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 114:        string str1 = "", str2 = "", str3 = "", str4 = "", str5 = "";
Line 115:        //بدست آوردن کلمات کلیدی 
Line 116:        str1 = dr_seo["menuTitle"].ToString();
Line 117:        str2 = dr_seo["description"].ToString();
Line 118:        str3 = dr_seo["keywords"].ToString();

Source File: c:\inetpub\vhosts\changmusic.ir\httpdocs\articles.aspx.cs    Line: 116

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) +2742428
   System.Data.SqlClient.SqlDataReader.TryReadColumn(Int32 i, Boolean setTimeout, Boolean allowPartiallyReadColumn) +55
   System.Data.SqlClient.SqlDataReader.GetValueInternal(Int32 i) +42
   System.Data.SqlClient.SqlDataReader.GetValue(Int32 i) +95
   articles.seo() in c:\inetpub\vhosts\changmusic.ir\httpdocs\articles.aspx.cs:116
   articles.Page_Load(Object sender, EventArgs e) in c:\inetpub\vhosts\changmusic.ir\httpdocs\articles.aspx.cs:26
   System.Web.UI.Control.OnLoad(EventArgs e) +108
   System.Web.UI.Control.LoadRecursive() +90
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1533


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4494.0