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  Server Error '/'  Application Object reference not set to an instance of an object Description: An unhandled exception was generated during the execution of the current web request. please review the stack trace for more information about the error and where it orginated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Stack Trace: [NullReferenceException: Object reference not set to an instance of an object.]      Microsoft.office.server.Administration.UserProfileApplicationProxy.get_ApplicationProperties()  +134 Microsoft.office.server.Administration.UserProfileApplicationProxy.get_PartitionIDs() +44 Microsoft.office.server.Administration.UserProfileApplicationProxy.IsAvailable(SPServiceContext ServiceContext) +134 // ----------------------------------------------------------------------------------------------------------------------------- This error occurred in SharePoint i...

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Here .NET 4.0 added a new property called ShowHeaderWhenEmpty in the grid view. So you can make it true in the gridview tag. < asp : GridView ID ="gridAccounts" runat ="server" ShowHeaderWhenEmpty ="true" > But in the other versions you need to add a blank row manually if no data found.

If we are using SharePoint app model AutoHosted Environment we need to use Client Context model to access SharePoint. Therefore First you need to get a Valid Access Token from SharePoint Server. For that you need to pass the SharePoint Site Url (This is available as SPHostUrl in the Query String) and Context Token that we can generate from passing the request Object . TokenHelper Class provides methods that used can be used to access the SharePoint server and generate Access Tokens. 1. Get the Context Token by passing the HttpRequest String context = TokenHelper .GetContextTokenFromRequest(Request); 2.Then get the Uri from the query string which provides the path to SharePoint server. Uri SharePointUri = new Uri (Request.QueryString[ "SPHostUrl" ]); 3. Then validate and generate access Token SharePointContextToken contextToken = TokenHelper .ReadAndValidateContextToken(context, SharePointUri.Authority); String AcessToken = TokenHelper .GetAccessToken(contextToken, shar...