Why am I getting an error in web config in ASP.NET?

Question

I'm a beginner in ASP.NET and in the web config file get the this error:

web config section must only appear once per config file

My web config file:

<system.web>
    <httpRuntime maxRequestLength="1048576" executionTimeout="3600" />
    <httpHandlers>
      <add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
    </httpHandlers>
    <pages>
      <controls>
        <add tagPrefix="asp" namespace="System.Web.UI.DataVisualization.Charting" assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      </controls>
    </pages>
    <compilation targetFramework="4.0">
      <assemblies>
        <add assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      </assemblies>
    </compilation>
    <httpRuntime/>
  </system.web>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4" compilerOptions="/langversion:4 /nowarn:1659;1699;1701">
          <providerOption name="CompilerVersion" value="v4.0"/>
      </compiler>
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+"/>
    </compilers>
  </system.codedom>
  <connectionStrings>
    <add name="myCaseLoginEntities" connectionString="metadata=res://*/MyEntity.LoginModel.csdl|res://*/MyEntity.LoginModel.ssdl|res://*/MyEntity.LoginModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=myCase;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient"/>
    <add name="myCaseConnectionString" connectionString="Data Source=.;Initial Catalog=myCase;Integrated Security=True" providerName="System.Data.SqlClient"/>
    <add name="CaseManagementConnectionString" connectionString="Data Source=.;Initial Catalog=CaseManagement;Integrated Security=True" providerName="System.Data.SqlClient"/>
  </connectionStrings>

I added this line to that file:

<httpRuntime maxRequestLength="1048576" executionTimeout="3600" />

Before that I did not have any errors. How can I solve that problem Thanks.

Maybe because you declarere it twice as self-closing?

Randy
– Randy

2016-08-07 11:58:40 +00:00
Commented Aug 7, 2016 at 11:58 — Randy
– Randy, Commented Aug 7, 2016 at 11:58
If only error messages would say what was wrong.

Jeroen Vannevel
– Jeroen Vannevel

2016-08-07 12:14:55 +00:00
Commented Aug 7, 2016 at 12:14 — Jeroen Vannevel
– Jeroen Vannevel, Commented Aug 7, 2016 at 12:14

krivtom · Accepted Answer · 2016-08-07 11:59:02Z

3

You have section httpRuntime twice in your config file:

<httpRuntime maxRequestLength="1048576" executionTimeout="3600" />

and

<httpRuntime/>

Just like it says in the error message that you posted, section must only appear once per config file. So in order to fix the issue remove one of the httpRuntime sections and configuration file should be valid.

answered Aug 7, 2016 at 11:59

krivtom

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2 Comments

behzad razzaqi Over a year ago

you say remove the <httpRuntime maxRequestLength="1048576" executionTimeout="3600" />? line?

krivtom Over a year ago

@behzadrazzaqi You need to remove one of two lines that I mentioned - either one, or another.

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