bonjour chers amis developpeurs,je m'excuse pour le message que je vais publier sur le forum.J'ai une erreur que j'ai rencontré dans ma programmation et j'ai du mal à resoudre.J'ai besoin de votre aide.Lorsque j'execute mon code voici l'erreur que je rencontre:
Connection alias LocalSqlServer not resolved in web.config
<?xml version="1.0"?>
<configuration>
<configSections>
<sectionGroup name="DbNetGrid">
<section name="ConnectionAlias" type="System.Configuration.NameValueSectionHandler, system,Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
</sectionGroup>
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>
<DbNetGrid>
<ConnectionAlias>
<add name="LocalSqlServer" connectionString="Server=SVR2\SQLEXPRESS;Database=GESTETUDE;Integrated Security=true" />
</ConnectionAlias>
</DbNetGrid>
<appSettings>
<add key="DbNetGridLicenseId" value="" />
<add key="DbNetGridLicenseKey" value="iQWPQO5viS2jyoBDQ+wGOo/Xo3b/HIHuMr4S9kW2dkph5R8EvUHB4s66KRCXBoUfDP/JECFv4kHc1eHCev4rjFmsNOFNjbi2Ur9YQlleXyPugT5Op5TO2c6pu/r/GDqu5fsjqXP6SF/USxWkCytscDpzI2LUuBGnewIVlt59ytBxuhaF6ygwRHgeDZDPWYrT8cwLG172XtvFzbZUlXuvr3Rgr4tQX3z99ySWCJHybZHc2NraA7jQHOxfRNQTsijF9rh/n9199amVkIgw3OWFEmnKLniiFovjY7AUZ2jTZ8Fpd3JR47dVhotl8J/Ax8DQ" />
<add key="DbNetGridDesignerIPAccess" value="" />
<add key="DbNetGridProfileDb" value="designer" />
<add key="DbNetGridSubFolder" value="" />
<add key="DbNetGridWebSite" value="" />
<add key="DbNetGridVirtualDir" value="/dbnetgrid" />
<add key="DbNetGridCultureSource" value="client" />
</appSettings>
<system.web>
<!--
Set compilation debug="true" to insert debugging
symbols into the compiled page. Because this
affects performance, set this value to true only
during development.
-->
<compilation debug="true">
<assemblies>
<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
</assemblies>
</compilation>
<!--
The <authentication> section enables configuration
of the security authentication mode used by
ASP.NET to identify an incoming user.
-->

<customErrors mode="Off" />
<authentication mode="Windows">

</authentication>

<!--
The <customErrors> section enables configuration
of what to do if/when an unhandled error occurs
during the execution of a request. Specifically,
it enables developers to configure html error pages
to be displayed in place of a error stack trace.

<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<error statusCode="403" redirect="NoAccess.htm" />
<error statusCode="404" redirect="FileNotFound.htm" />
</customErrors>
-->
<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</controls>
</pages>
<httpHandlers>
<remove verb="*" path="*.asmx" />
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" />
</httpHandlers>
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpModules>
</system.web>
<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<providerOption name="CompilerVersion" value="v3.5" />
<providerOption name="WarnAsError" value="false" />
</compiler>
</compilers>
</system.codedom>
<!--
The system.webServer section is required for running ASP.NET AJAX under Internet
Information Services 7.0. It is not necessary for previous version of IIS.
-->
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules>
<remove name="ScriptModule" />
<add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</modules>
<handlers>

<add name="dbnetgrid_ashx" path="dbnetgrid.ashx" verb="*" type="DbNetLink.DbNetSuite.DbNetGrid" resourceType="Either" requireAccess="Script" />
<add name="dbnetedit_ashx" verb="*" path="dbnetedit.ashx" type="DbNetLink.DbNetSuite.DbNetEdit" />
<add name="dbnetfile_ashx" verb="*" path="dbnetfile.ashx" type="DbNetLink.DbNetSuite.DbNetFile" />
<add name="dbnetspell_ashx" verb="*" path="dbnetspell.ashx" type="DbNetLink.DbNetSuite.DbNetSpell" />
<add name="dbnetcombo_ashx" verb="*" path="dbnetcombo.ashx" type="DbNetLink.DbNetSuite.DbNetCombo" />
<add name="dbnetlist_ashx" verb="*" path="dbnetlist.ashx" type="DbNetLink.DbNetSuite.DbNetList" />
<add name="dbnetsuite_js_ashx" verb="*" path="dbnetsuite.js.ashx" type="DbNetLink.DbNetSuite.JS" />
<add name="dbnetsuite_css_ashx" verb="*" path="dbnetsuite.css.ashx" type="DbNetLink.DbNetSuite.CSS" />
</handlers>
<directoryBrowse enabled="true" />
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
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<?xml version="1.0"?>
<configuration> 
  <configSections>
    <sectionGroup name="DbNetGrid">
      <section name="ConnectionAlias" type="System.Configuration.NameValueSectionHandler, system,Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
          <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
          <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
            <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
            <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
          </sectionGroup>
        </sectionGroup>
      </sectionGroup>
    </sectionGroup>
  </configSections>
  <DbNetGrid>
    <ConnectionAlias>
      <add name="LocalSqlServer" connectionString="Server=SVR2\SQLEXPRESS;Database=GESTETUDE;Integrated Security=true" />
    </ConnectionAlias>
  </DbNetGrid>
  <appSettings>
    <add key="DbNetGridLicenseId" value="" />
    <add key="DbNetGridLicenseKey" value="iQWPQO5viS2jyoBDQ+wGOo/Xo3b/HIHuMr4S9kW2dkph5R8EvUHB4s66KRCXBoUfDP/JECFv4kHc1eHCev4rjFmsNOFNjbi2Ur9YQlleXyPugT5Op5TO2c6pu/r/GDqu5fsjqXP6SF/USxWkCytscDpzI2LUuBGnewIVlt59ytBxuhaF6ygwRHgeDZDPWYrT8cwLG172XtvFzbZUlXuvr3Rgr4tQX3z99ySWCJHybZHc2NraA7jQHOxfRNQTsijF9rh/n9199amVkIgw3OWFEmnKLniiFovjY7AUZ2jTZ8Fpd3JR47dVhotl8J/Ax8DQ" />
    <add key="DbNetGridDesignerIPAccess" value="" />
    <add key="DbNetGridProfileDb" value="designer" />
    <add key="DbNetGridSubFolder" value="" />
    <add key="DbNetGridWebSite" value="" />
    <add key="DbNetGridVirtualDir" value="/dbnetgrid" />
    <add key="DbNetGridCultureSource" value="client" />
  </appSettings>
   <system.web>
    <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
    <compilation debug="true">
      <assemblies>
        <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
        <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
        <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
      </assemblies>
    </compilation>
    <!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
 
    <customErrors mode="Off" />
    <authentication mode="Windows">
 
    </authentication>
 
    <!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.
 
        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
    <pages>
      <controls>
        <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      </controls>
    </pages>
    <httpHandlers>
      <remove verb="*" path="*.asmx" />
      <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" />
    </httpHandlers>
    <httpModules>
      <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    </httpModules>
  </system.web>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <providerOption name="CompilerVersion" value="v3.5" />
        <providerOption name="WarnAsError" value="false" />
      </compiler>
    </compilers>
  </system.codedom>
  <!-- 
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
    -->
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules>
      <remove name="ScriptModule" />
      <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    </modules>
    <handlers>
 
      <add name="dbnetgrid_ashx" path="dbnetgrid.ashx" verb="*" type="DbNetLink.DbNetSuite.DbNetGrid" resourceType="Either" requireAccess="Script" />
      <add name="dbnetedit_ashx" verb="*" path="dbnetedit.ashx" type="DbNetLink.DbNetSuite.DbNetEdit" />
      <add name="dbnetfile_ashx" verb="*" path="dbnetfile.ashx" type="DbNetLink.DbNetSuite.DbNetFile" />
      <add name="dbnetspell_ashx" verb="*" path="dbnetspell.ashx" type="DbNetLink.DbNetSuite.DbNetSpell" />
      <add name="dbnetcombo_ashx" verb="*" path="dbnetcombo.ashx" type="DbNetLink.DbNetSuite.DbNetCombo" />
      <add name="dbnetlist_ashx" verb="*" path="dbnetlist.ashx" type="DbNetLink.DbNetSuite.DbNetList" />
      <add name="dbnetsuite_js_ashx" verb="*" path="dbnetsuite.js.ashx" type="DbNetLink.DbNetSuite.JS" />
      <add name="dbnetsuite_css_ashx" verb="*" path="dbnetsuite.css.ashx" type="DbNetLink.DbNetSuite.CSS" />
    </handlers>
    <directoryBrowse enabled="true" />
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>