[DotNetDevelopment] string conn = ConfigurationManager.ConnectionStrings["appConnection"].ConnectionString;

[hirendra singh]

i am find some error in my server runing code! how to finD  best solution

  string conn =
ConfigurationManager.ConnectionStrings["appConnection"].ConnectionString;

pllz any one can solve my problem

thanks

Server Error in '/' Application.
------------------------------
 *Object reference not set to an instance of an object.*  * Description: *An
unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error
and where it originated in the code.

* Exception Details: *System.NullReferenceException: Object reference not
set to an instance of an object.

*Source Error:*

  Line 14: {
Line 15:     SqlConnection con = new SqlConnection();
Line 16:     string conn =
ConfigurationManager.ConnectionStrings["appConnection"].ConnectionString;
Line 17:     protected void Page_Load(object sender, EventArgs e)
Line 18:     {


* Source File: * c:\inetpub\vhosts\vdnext.com\httpdocs\Default.aspx.cs*
Line: * 16

*Stack Trace:*

  [NullReferenceException: Object reference not set to an instance of
an object.]
   DashbordHome..ctor() in
c:\inetpub\vhosts\vdnext.com\httpdocs\Default.aspx.cs:16
   ASP.default_aspx..ctor() in
c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
Files\root\76234fdf\841788f2\App_Web_prgugeem.0.cs:0
   __ASP.FastObjectFactory_app_web_prgugeem.Create_ASP_default_aspx()
in c:\windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET
Files\root\76234fdf\841788f2\App_Web_prgugeem.4.cs:0
   System.Web.Compilation.BuildResultCompiledType.CreateInstance() +32
   System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath
virtualPath, Type requiredBaseType, HttpContext context, Boolean
allowCrossApp, Boolean noAssert) +119
   System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext
context, String requestType, VirtualPath virtualPath, String
physicalPath) +33
   
System.Web.UI.PageHandlerFactory.System.Web.IHttpHandlerFactory2.GetHandler(HttpContext
context, String requestType, VirtualPath virtualPath, String
physicalPath) +40
   System.Web.HttpApplication.MapHttpHandler(HttpContext context,
String requestType, VirtualPath path, String pathTranslated, Boolean
useAppConfig) +160
   
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+93
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step,
Boolean& completedSynchronously) +155


------------------------------
*Version Information:* Microsoft .NET Framework Version:2.0.50727.3053;
ASP.NET Version:2.0.50727.3053
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