CodeProject Latest postings for ASP.NET

HOW TO ANSWER A QUESTION

Chris Maunder — Mon, 13 Jul 2009 08:39:00 GMT

Apologies for the shouting but this is important.

When answering a question please:

Read the question carefully
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar
If a question is poorly phrased then either ask for clarification, ignore it, or mark it down. Insults are not welcome
If the question is inappropriate then click the 'vote to remove message' button

Insults, slap-downs and sarcasm aren't welcome. Let's work to help developers, not make them feel stupid.

cheers,
Chris Maunder

The Code Project Co-founder
Microsoft C++ MVP

Api call connection resets

Fred2834 — Tue, 16 Jul 2024 13:56:00 GMT

Hello,

In an ASP .Net Core 8 API, we have an issue with the processing of a call that lasts longer than 2 minutes.
It lasts long because we have to parse a ton of files (call can be 5-6 minutes), we know this should be improved, but that's beside the point here.

In a previous version of this API (.Net Framework 4.8), this call used to last just as long, and the API did not reset the connection.

In the .Net 8 version, we get such a message :

Connection id "xxx" reset.
Connection id "xxx" sending FIN because: "The Socket transport's send loop completed gracefully."
Connection id "xxx" disconnecting.

After some googling and copilot'ing, we found that this seems related to Kestrel configuration, so we tried several things:

- serverOptions.Limits.KeepAliveTimeout = TimeSpan.FromMinutes(5);
- Changed a few parameters related to timeouts in IIS
- Changed the timeout parameter from the client app calling the API

.. but nothing works.

Does anyone have experience with this ?

It's clear that the timeout duration has to be adjusted somewhere, but we have no idea where to look.

Thanks in advance

Do ASP.net MVC5 apps require Full trust on IIS10?

Jean Vallee — Mon, 08 Jul 2024 14:40:00 GMT

I have an ASP.net MVC5 app publish on a host provider.
CAS trust level is FULL and app runs fine.

I want to move the app to another host but they only sport CAS Trust level High and below.

I found this reference earlier:

"ASP.NET MVC 5 does not support running in anything other than full trust. Microsoft have provided guidance for hosters to move away from using CAS trust levels and use proper OS-level isolation instead."

and forwarded it to the new provider.
They responded that they are running IIS10 and Windows Server 2019 and the statement above does not apply.

Could someone please answer definitively as to whether ASP.Net MVS5 apps require FULL Trust level on IIS10/Server 2019? Current link to source would be appreciated.

Change Code Access Security Level on Plesk

Jean Vallee — Wed, 03 Jul 2024 17:51:00 GMT

I built a simple 1 page site with Visual Studio 2022 using asp.net. It has a few buttons that display some images and 2 links to a subdomain. No additional modules were used... just published with straight VS.

The host I am using has the CAS trust level default as FULL and it works successfully if I leave it that way.

Now I want to change hosts and the new host does not support a FULL CAS Trust Level, only HIGH.

This is my web.config:

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  https://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <customErrors mode="Off" />
    <compilation targetFramework="4.8" tempDirectory="D:\InetPub\vhosts\permitlvonline.com\tmp" />
    <httpRuntime targetFramework="4.8" />
    <securityPolicy>
      <trustLevel name="Full" policyFile="internal" />
      <trustLevel name="High" policyFile="web_hightrust.config" />
      <trustLevel name="Medium" policyFile="web_mediumtrust.config" />
      <trustLevel name="Low" policyFile="web_lowtrust.config" />
      <trustLevel name="Minimal" policyFile="web_minimaltrust.config" />
    </securityPolicy>
    <trust level="High" />
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" />
        <bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-12.0.0.0" newVersion="12.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.7.0" newVersion="5.2.7.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.codedom>
  </system.codedom>
</configuration>
<!--ProjectGuid: 341B6D57-1384-4224-8AC6-C7F85BF0A4E3-->

I placed the web_hightrust.config file in the same folder as web.config.

This is the error message generated when I set CAS trust level to High. (instead of Full)

[SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
   System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0
   System.Security.CodeAccessPermission.Demand() +57
   System.Web.HttpContext.System.IServiceProvider.GetService(Type service) +79
   System.Web.WebPages.UrlRewriterHelper.IsUrlRewriterTurnedOn(HttpContextBase httpContext) +128
   System.Web.WebPages.UrlRewriterHelper.WasRequestRewritten(HttpContextBase httpContext) +16
   System.Web.WebPages.UrlUtil.GenerateClientUrlInternal(HttpContextBase httpContext, String contentPath) +167
   System.Web.WebPages.UrlUtil.GenerateClientUrlInternal(HttpContextBase httpContext, String contentPath) +113
   System.Web.WebPages.UrlUtil.GenerateClientUrl(HttpContextBase httpContext, String basePath, String path, Object[] pathParts) +150
   ASP._Page_Views_Shared__Layout_cshtml.Execute() +620
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +148
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +122
   System.Web.WebPages.<>c__DisplayClass40_0.<RenderPageCore>b__0(TextWriter writer) +309
   System.Web.WebPages.HelperResult.WriteTo(TextWriter writer) +18
   System.Web.WebPages.WebPageBase.Write(HelperResult result) +108
   System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body) +89
   System.Web.WebPages.WebPageBase.PopContext() +310
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +152
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +378
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +17
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +91
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +795
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81
   System.Web.Mvc.Async.<>c__DisplayClass3_6.<BeginInvokeAction>b__4() +262
   System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__1(IAsyncResult asyncResult) +188
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +60
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +60
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
   System.Web.Mvc.<>c.<BeginExecute>b__151_2(IAsyncResult asyncResult, Controller controller) +17
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +60
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +14
   System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +43
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +60
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +13
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4718.0

I asked my current host for tech assistance and they did not have an answer but suggested I comment code out of the <system.codedom> section. There is no code to comment out so it's obvious they did not even look at my web.config file.

What do I need to change either in web.config or VS to get it change to a CAS level of HIGH?

ASP.NET Web Application Deploy on IIS problem : Image / Icon not display

SHAHROL AZMI BIN AMZAT — Thu, 13 Jun 2024 02:56:00 GMT

Hi Sir,

I'm already develop asp.net web application using Visual Studio 2019, when i want to publish the wep app on IIS, all the icon / image on my page not appear. Also no all folder that i create such as Images folder , Logs Folder not included in publish folder.

Can anyone help me? Really appreciate. Thanks

How to point an application to a new DB server

Richard Andrew x64 — Thu, 06 Jun 2024 15:05:00 GMT

I have created a test ASP.NET Core MVC application in VS 2022.

I configured individual authentication so it automatically created a database in the (localdb)\MSSQLLocalDB database server for all authentication chores.

I need to deploy the test application to a web server along with its database.

Where in the application do I point it to the web server's database server? The appsettings.json file doesn't contain a connection string for the (localdb), so I don't know if that's the right place for a different connection string.

If you could point me in the right direction, I'll be grateful.

The difficult we do right away...
...the impossible takes slightly longer.

How C Programming Principles Shape C# .NET Development

Member 16280786 — Thu, 06 Jun 2024 13:53:00 GMT

How do C programming principles influence C# .NET development, and how can understanding C help in mastering C#? Discuss the similarities in syntax, differences in memory management, the role of pointers, object-oriented programming concepts, platform independence, and use case differences. Share your experiences and insights on transitioning from C to C#.

assertion failed : unrecognized tag script

Patil Anant — Sat, 09 Mar 2024 13:07:00 GMT

how to fix "assertion failed : unrecognized tag script" error

Anant Patil
Broadllyne Technology

is it hard to add new module into Umbraco CMS?

Southmountain — Wed, 07 Feb 2024 19:23:00 GMT

I want to build my own gallery module and add it into Umbraco CMS.

is it difficult to do this?

diligent hands rule....

UI library for ASP.NET Core MVC Razor

Mark Pelf — Fri, 08 Dec 2023 16:18:00 GMT

I am planning the development of ASP.NET Core MVC Razor application and am looking for FREE library of some quality that supports MVC/Razor development. I see plenty of commercial libraries like Kendo UI that can be used, but I am looking for something like Open Source Material Design. As far as I know, Material UI is usable only from SPA/React, and I want to develop MVC/Razor application that is Round-trip (Request/Response), not an SPA application like React.

Coding Help

appache05 — Sat, 25 Nov 2023 05:04:00 GMT

Hello

Please note that I am sorry to take anyone's time out of whatever busy life they might have. So I have a professional class project which unfortunatly is related to coding even though its just about the first and last time this is supposed to happen. I am supposed to write a .net code in VS for windows VM that will show ip address of the VM from a browser. I am not a programmer nor any career close to that so I am completely stuck and dont want to just call it a day without trying every possible avenue on the internet. I have been on this for 24hrs trying on my own with different online forums even chatgpt/Bard but to no avail so I need help. Just help write the code to help a brother out please. I saw that VS has a bunch of asp.net templates so I kept shoveling between asp.net core web api and asp.net web app (razor pages) but no luck. This project is in aws and its part of the requirement I need to complete the project.

Am gratefull

What should I start reading to get to where I want to go?

DalTXColtsFan — Tue, 21 Nov 2023 22:46:00 GMT

I am a consultant, not a developer, so I mainly develop small customizations to my company's software as opposed to coding entire applications from scratch and selling them.

I have basic experience with HTML, though admittedly I've never personally written HTML code that has a div tag. I'm somewhat familiar with XML style sheets but it's been awhile. I remember that classic ASP code basically just dynamically produced HTML and sent it from the server to the client - I'm honestly not sure whether or not ASP.Net does the same thing. I'm somewhat familiar with JavaScript and VBScript and somewhat understand the difference between client-side code and server-side code. I've heard that there's this thing called Ajax - all I really know about it is that it makes it easier to write client-side code that actually interacts with the server. I've heard that my company's website uses the React framework but I don't know what that is. Regardless, ASP.Net web parts can be coded and then "pasted into" custom areas on the company's website. There are very rare needs to code entire ASPX web pages, but the ASCX controls are used a LOT.

I need to get to the point where I can code reasonably complex and dynamic ASP.Net web parts to paste into the main website. There are frequent business needs for which the right technical solution is either client-side code, server-side code or both. In most cases, the user interface is fairly simple, but I've seen some get fairly complex, i.e. the entire form can change based on a selection in a dropdown (i.e. a dropdown could include 4 or 5 different reports they can generate, and the input into each report could be totally different). I've also seen web parts that actually have a dynamic number of dropdowns on them (how that could POSSIBLY be the most efficient user interface for a given business need is beyond me, but I've seen it happen.

So here's the question - based on what little I know, what should I start studying/reading/practicing to get to where I can reach my goal? Any suggested online training sites and/or books I could buy to start learning?

Hope I elucidated the question sufficiently for it to be actionable.

Thanks
DalTXColtsFan

SelectedIndexChanged for DropDown not fired when first item selected

DalTXColtsFan — Fri, 17 Nov 2023 18:41:00 GMT

I wish it was a little easier to post screenshots here, but what's going on is my SelectedIndexChanged event handler is being triggered if I choose any item in the dropdown OTHER THAN THE TOP ONE. When I choose the top item in the dropdown, Page_Load is getting fired, but not SelectedIndexChanged. What's going on?

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="First2023WebUserControl.ascx.cs" Inherits="First2023Control.UserControls.First2023WebUserControl" %>
<asp:Label ID="Label1" runat="server" Text="Hello Year 2023"></asp:Label>
<p>
     </p>
Category:<asp:DropDownList ID="ddlCategory" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlCategory_SelectedIndexChanged">
</asp:DropDownList>
<p>
    Subcategory:
    <asp:DropDownList ID="ddlSubcategory" runat="server" AutoPostBack="True">
    </asp:DropDownList>
</p>
<p>
    <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</p>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>

protected void Page_Load(object sender, EventArgs e)
{

        Label3.Text = "In Page Load selected index is " + ddlCategory.SelectedIndex.ToString();
        XXXDbSupport objDBSupport = new XXXDbSupport();
        DbCommand objDBCommand = objDBSupport.CreateDbCommand();
        objDBCommand.CommandType = CommandType.Text;
        string sSQL = "select distinct isnull(Category,'(blank)') as ProdCat from xxx_product order by isnull(Category,'(blank)')";
        objDBCommand.CommandText = sSQL;
        DataTable objDBTable = objDBSupport.FillDataTable(objDBCommand);
        if (objDBTable.Rows.Count > 0)
        {
            ddlCategory.DataTextField = "ProdCat";
            ddlCategory.DataValueField = "ProdCat";
            ddlCategory.DataSource = objDBTable;
            ddlCategory.DataBind();
        }
        else
        {
            ddlCategory.Text = "n/a";
        }

}

protected void ddlCategory_SelectedIndexChanged(object sender, EventArgs e)
{
    Label2.Text = "The selected index changed to " + ddlCategory.SelectedIndex.ToString();
    XXXDbSupport objDBSupport = new XXXDbSupport();
    DbCommand objDBCommand = objDBSupport.CreateDbCommand();
    objDBCommand.CommandType = CommandType.Text;
    string sSQL = "select distinct isnull(SubCategory,'(blank)') as SubCat from xxx_product ";
    if (ddlCategory.Text == "(blank)")
    {
        sSQL = sSQL + "where isnull(Category,'(blank)') = '(blank)' order by isnull(SubCategory,'(blank)')";
    }
    else
    {
        sSQL = sSQL + "where Category = '" + ddlCategory.Text + "' order by isnull(SubCategory,'(blank)')";
    }
    objDBCommand.CommandText = sSQL;
    DataTable objDBTable = objDBSupport.FillDataTable(objDBCommand);
    if (objDBTable.Rows.Count > 0)
    {
        ddlSubcategory.DataTextField = "SubCat";
        ddlSubcategory.DataValueField = "SubCat";
        ddlSubcategory.DataSource = objDBTable;
        ddlSubcategory.DataBind();
    }
    else
    {
        ddlSubcategory.Text = "n/a";
    }

}

Dumb it down for one who's basically a beginner

DalTXColtsFan — Wed, 15 Nov 2023 16:31:00 GMT

OK, I'll put this in as few words as possible, and please bear with me if I am not clear, I'm still relatively new to this stuff:

So my company has a website we roll out to our customers, and the developers provided a base class to the consultants to use to create custom web parts. The website has a "design mode" built into it where an admin can divide the page up into sections, and basically assign a custom web part to that section of the page. The ascx and dll for the web part obviously have to be on the IIS server where the website can "see" it. I'm not sure exactly how that works technologically, i.e. if it's a master page with individual pages or if it's like a div or whatever.

Anyway, I tried to create a simple webpart with two dropdowns, one of which depends on the other, and a button. The labels and dropdowns appear to be initializing correctly. When I click the button, it correctly updates the label but it clears the dropdowns. Changing the selection in either dropdown appears to re-initialize the entire form including clearing the dropdowns.

Lastly, I could be wrong but I don't believe that the code in ddlCategory_SelectedIndexChanged is getting fired as a result of the dropdown getting clicked - I think it's only getting ran when I call it explicitly. Again, I could be wrong, but I feel like any time a "postback" is issued, only Page_Load is getting fired off, and the controls are all getting cleared/initialized before any of the code in Page_Load is actually run.

I'll pause there for a moment - does anyone see anything in *my* code that could be causing this incorrect result? Before I talk about how I could troubleshoot it within the framework of the rest of my company's website let's establish that.

Thanks
DTXCF

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="First2023WebUserControl.ascx.cs" Inherits="First2023Control.UserControls.First2023WebUserControl" %>
<asp:Label ID="Label1" runat="server" Text="Hello Year 2023"></asp:Label>
<p>
     </p>
Category:<asp:DropDownList ID="ddlCategory" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlCategory_SelectedIndexChanged">
</asp:DropDownList>
<p>
    Subcategory:
    <asp:DropDownList ID="ddlSubcategory" runat="server" AutoPostBack="True">
    </asp:DropDownList>
</p>
<p>
    <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</p>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Custom1.Custom2.Web.Framework;

namespace First2023Control.UserControls
{
//public partial class First2023WebUserControl : System.Web.UI.UserControl
public partial class First2023WebUserControl : Custom1.Custom2.Web.Framework.UserControlBase
{
[Property(DisplayName = "Message Text")]
public string MessageText
{
get
{
return Label1.Text;
}
set
{
Label1.Text = value;
}
}
protected void Page_Load(object sender, EventArgs e)
{

if (IsPostBack == false)
{
ddlCategory.Items.Add("FirstCat");
ddlCategory.Items.Add("SecondCat");
ddlCategory_SelectedIndexChanged(sender, e);
}
else
{
Label1.Text = "I posted back";
}
}

protected void ddlCategory_SelectedIndexChanged(object sender, EventArgs e)
{
Label2.Text = "The selected index changed";
if (ddlCategory.SelectedValue == "FirstCat")
{
ddlSubcategory.Items.Clear();
ddlSubcategory.Items.Add("FirstCatFirstSubCat");
ddlSubcategory.Items.Add("FirstCatSecondSubCat");
}
else
{
ddlSubcategory.Items.Clear();
ddlSubcategory.Items.Add("SecondCatFirstSubCat");
ddlSubcategory.Items.Add("SecondCatSecondSubCat");
}

}

protected void Button1_Click(object sender, EventArgs e)
{
Label3.Text = "Someone clicked the button";
}
}
}

can't build blazor library in azure pipeline

Super Lloyd — Thu, 07 Sep 2023 03:08:00 GMT

When I try to build my project with azure pipeline (or even my PC), using that command line:

dotnet.exe publish C:\..\Produce.csproj --configuration Release -r win-x64 --self-contained true --output C:\..\Produce5

I got same version number as my computer and this error, all the time, almost immediately:

MSBuild version 17.7.1+971bf70db for .NET
...
C:\Program Files\dotnet\sdk\7.0.400\Sdks\Microsoft.NET.Sdk.BlazorWebAssembly\targets\Microsoft.NET.Sdk.BlazorWebAssembly.6_0.targets(325,5)
error MSB4018: 
The "GenerateBlazorWebAssemblyBootJson" task failed unexpectedly. [C:\...\Parts.Production.Blazor.csproj]
System.IO.IOException: The process cannot access the file 'C:\..\Parts.Production.Blazor\obj\Release\net7.0\blazor.boot.json' because it is being used by another process. [C:\..\Parts.Production.Blazor.csproj]

The funny thing is, the whole thing build fine with visual studio!
Any idea what's wrong, or what I could do?

Perhaps, Visual Studio 2022 is not using Microsoft.NET.Sdk.BlazorWebAssembly.6_0.targets and I too can avoid it with the command line?

REMARK
adding -maxcpucount:1 to the command line fixes this build job step, but it's a lot slower (obviously) and the whole solution pipeline build job still fails because it's now taking more than an hour...

A new .NET Serializer
All in one Menu-Ribbon Bar
Taking over the world since 1371!

Blazor component debugging

Super Lloyd — Thu, 24 Aug 2023 00:16:00 GMT

I have an existing MVC app, to which I added some Blazor components on some pages.
I.e. instead of starting a new fully Blazor app, I am trying to extend the functionality of an existing app.

I am using WebAssembly rendering, particularly as they are interactive components (updating the UI, doing web service calls, etc..)

It's all working very well except... I can't use breakpoint / debug the components!
Any clue on how to enable debugging of Blazor component on an MVC view?

A new .NET Serializer
All in one Menu-Ribbon Bar
Taking over the world since 1371!

HTML SELECT CONTROL WITH RUNAT="SERVER

tchia_k — Sun, 30 Jul 2023 13:53:00 GMT

How cam i keep the data source of htmlselect control after postback ?
( I have 14 select controls and don ot wantto load data from db)
**I need the control to not do postback when changed and have both server and client script there for I diddn't use

"Context.UserIdentifier" of SignalR is always null when I use CustomAuthenticationStateProvider in Blazor Server App

Alex Wright 2022 — Fri, 21 Jul 2023 13:45:00 GMT

I'm working on Blazor server App project. I have the following codes for CustomAuthenticationStateProvider:

CustomAuthenticationStateProvider.cs

public class CustomAuthenticationStateProvider : AuthenticationStateProvider
    {
        private readonly ProtectedSessionStorage _sessionStorage;
        private ClaimsPrincipal _anonymous = new ClaimsPrincipal(new ClaimsIdentity());
        public CustomAuthenticationStateProvider(ProtectedSessionStorage sessionStorage)
        {
            _sessionStorage = sessionStorage;
        }

        public override async Task<AuthenticationState> GetAuthenticationStateAsync()
        {
            try
            {
                var userSessionStorageResult = await _sessionStorage.GetAsync<UserSession>("UserSession");
                var userSession = userSessionStorageResult.Success ? userSessionStorageResult.Value : null;
                if (userSession == null)
                {
                    return await Task.FromResult(new AuthenticationState(_anonymous));
                }
                var claimsPrincipal = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim> {
                new Claim(ClaimTypes.Name, userSession.Username),
                new Claim(ClaimTypes.Role, userSession.UserRole),
                new Claim(ClaimTypes.NameIdentifier, userSession.UserId.ToString())
            }, "Jwt"));

                return await Task.FromResult(new AuthenticationState(claimsPrincipal));
            }
            catch (Exception)
            {
                return await Task.FromResult(new AuthenticationState(_anonymous));
            }
        }

        public async Task UpdateAuthenticationState(UserSession userSession)
        {
            ClaimsPrincipal claimsPrincipal;

            if (userSession != null)
            {
                await _sessionStorage.SetAsync("UserSession", userSession);
                await _sessionStorage.SetAsync("Token", userSession.TokenText);
                claimsPrincipal = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim>
                {
                    new Claim(ClaimTypes.Name, userSession.Username),
                    new Claim(ClaimTypes.Role, userSession.UserRole),
                    new Claim(ClaimTypes.NameIdentifier, userSession.UserId.ToString())
                }));
            }
            else
            {
                await _sessionStorage.DeleteAsync("UserSession");
                claimsPrincipal = _anonymous;
            }

            NotifyAuthenticationStateChanged(Task.FromResult(new AuthenticationState(claimsPrincipal)));
        }
    }

UserSession.cs

public class UserSession
{
    public int UserId { get; set; }
    public string Username { get; set; }
    public string UserRole { get; set; }
    public string Name { get; set; }
    public string TokenText { get; set; }
}

LoginController:

[Route("api/[controller]/[action]")]
    [ApiController]
    public class ApiLoginController : ControllerBase
    {
        private readonly SqliteContext _sqlServerContext;
        private readonly IConfiguration _configuration;
        private readonly IUserService _userService;

        public ApiLoginController(SqliteContext sqlServerContext, IConfiguration configuration, IUserService userService)
        {
            _sqlServerContext = sqlServerContext;
            _configuration = configuration;
            _userService = userService;
        }

        [HttpPost]
        public async Task<IActionResult> LoginSystem([FromBody] UserLoginVM loginModel)
        {
            var user = await _sqlServerContext.Users.Include(x => x.RoleRefNavigation)
                .FirstOrDefaultAsync(x => x.Username == loginModel.Username && x.IsActive);
            if (user == null)
            {
                return BadRequest("Invalid credentials.");
            }

            if (!MatchPasswordHash(loginModel.Password, user.Password, user.SaltPassword))
            {
                return BadRequest("Invalid credentials.");
            }
            if (!user.IsActive)
            {
                return StatusCode(403, "User is not active.");
            }
            if (user.IsLocked)
            {
                DateTime setDate = (DateTime)user.LockUntil;
                DateTime current = DateTime.Now;
                if (setDate > current)
                {
                    return StatusCode(403, "User is restricted.");
                }
                await _userService.UnsetUserLimits(user.UserId);
            }

            user.RoleRefNavigation = await _sqlServerContext.Roles.FirstOrDefaultAsync(x => x.RoleId == user.RoleRef);
            string token = CreateToken(user);

            var data = new
            {
                tokenText = token,
                username = user.Username,
                userId = user.UserId.ToString(),
                name = user.Name,
                role = user.RoleRefNavigation.User_Role
            };

            await _userService.RegisterLoginTime(user.UserId);

            return Ok(data);
        }

        private string CreateToken(User user)
        {
            List<Claim> claims = new List<Claim>()
            {
                new Claim(ClaimTypes.NameIdentifier, user.Username),
                new Claim(ClaimTypes.Role, user.RoleRefNavigation.User_Role),
                new Claim(type: "UserId", value: user.UserId.ToString())
            };

            var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration.GetSection("Jwt:Key").Value!));
            var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha512Signature);
            var token = new JwtSecurityToken(
                claims: claims,
                issuer: _configuration["Jwt:Issuer"],
                audience: _configuration["Jwt:Issuer"],
                expires: DateTime.Now.AddHours(8),
                signingCredentials: creds
                );

            var jwt = new JwtSecurityTokenHandler().WriteToken(token);

            return jwt;
        }

        private bool MatchPasswordHash(string passwordText, byte[] password, byte[] passwordKey)
        {
            using (var hmac = new HMACSHA512(passwordKey))
            {
                var passwordHash = hmac.ComputeHash(Encoding.UTF8.GetBytes(passwordText));

                for (int i = 0; i < passwordHash.Length; i++)
                {
                    if (passwordHash[i] != password[i])
                    {
                        return false;
                    }
                }
                return true;
            }
        }
    }

The problem is that when I check Context.User?.Claims.FirstOrDefault(x => x.Type == ClaimTypes.NameIdentifier)?.Value; in SignalR hub, Context.UserIdentifier is always null. How can I fix this?

Is is possible to import an excel file with hyperlinks?

samflex — Mon, 17 Jul 2023 03:25:00 GMT

I have an excel file with five (5) columns.

All the records in the second column are hyperlinked.

When I tried importing the file to SQL Server, the hyperlinks are gone.

I have spent almost 4 days googling to see if there is a way to do import this excel file with hyperlink either to a SQL Server DB or asp.net application but to no avail.

Wondering if any of you experts has an idea how to do solve this problem?

Many thanks in advance.

Illustrating ad emails

Ali Al Omairi(Abu AlHassan) — Mon, 10 Jul 2023 12:35:00 GMT

Hi guys
I am writing a tool for meeting management in my organization so I use ews managed api to call the exchange server
What I need to do is showing the ad user emails just like when you press to button in the outlook
Anyone can help me with this

Help people,so poeple can help you.