Server Error in '/' Application.

There is no row at position 0.

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.IndexOutOfRangeException: There is no row at position 0.

Source Error:


Line 104:    {
Line 105:        DataSet ds = Unit.ins.selectByID(UnitID);
Line 106:        Header = ds.Tables[0].Rows[0]["Subject"].ToString();
Line 107:        GradeName = ds.Tables[0].Rows[0]["Grade"].ToString();
Line 108:        UnitN = ds.Tables[0].Rows[0]["fld_title"].ToString();

Source File: c:\Seraj-Server\seraj-website\Seraj\unit.aspx.cs    Line: 106

Stack Trace:


[IndexOutOfRangeException: There is no row at position 0.]
   System.Data.RBTree`1.GetNodeByIndex(Int32 userIndex) +2508478
   System.Data.DataRowCollection.get_Item(Int32 index) +20
   Seraj_unit.FillHeader(String UnitID) in c:\Seraj-Server\seraj-website\Seraj\unit.aspx.cs:106
   Seraj_unit.Page_Load(Object sender, EventArgs e) in c:\Seraj-Server\seraj-website\Seraj\unit.aspx.cs:48
   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:4.8.4110.0