Server Error in '/' Application.

Invalid attempt to read when no data is present.

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.InvalidOperationException: Invalid attempt to read when no data is present.

Source Error:


Line 54:                 SqlDataReader idr2 = cmd.ExecuteReader();
Line 55:                 idr2.Read();
Line 56:                 AuthorCode = Convert.ToString(idr2[8]);
Line 57:                 idr2.Close();
Line 58:                 con.Close();

Source File: c:\inetpub\vhosts\korraniha.ir\httpdocs\NewsDescription.aspx.cs    Line: 56

Stack Trace:


[InvalidOperationException: Invalid attempt to read when no data is present.]
   System.Data.SqlClient.SqlDataReader.CheckDataIsReady(Int32 columnIndex, Boolean allowPartiallyReadColumn, Boolean permitAsync, String methodName) +1769206
   System.Data.SqlClient.SqlDataReader.TryReadColumn(Int32 i, Boolean setTimeout, Boolean allowPartiallyReadColumn) +49
   System.Data.SqlClient.SqlDataReader.GetValueInternal(Int32 i) +32
   System.Data.SqlClient.SqlDataReader.GetValue(Int32 i) +76
   System.Data.SqlClient.SqlDataReader.get_Item(Int32 i) +12
   NewsDescription.GetNews(Int32 pageIndex) in c:\inetpub\vhosts\korraniha.ir\httpdocs\NewsDescription.aspx.cs:56
   NewsDescription.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\korraniha.ir\httpdocs\NewsDescription.aspx.cs:19
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0