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 162:        string str1 = "", str2 = "", str3 = "", str4 = "", str5 = "";
Line 163:        //بدست آوردن کلمات کلیدی 
Line 164:        str1 = dr_seo["faname"].ToString();
Line 165:        str2 = dr_seo["tags"].ToString();
Line 166:        str3 = dr_seo["tags"].ToString();

Source File: d:\hostingspaces\carjob.ir\httpdocs\shopproductsview.aspx.cs    Line: 164

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) +2742604
   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
   shopproductsview.Page_Load(Object sender, EventArgs e) in d:\hostingspaces\carjob.ir\httpdocs\shopproductsview.aspx.cs:164
   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:4.8.4700.0