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 80:     {
Line 81:         DataSet ds = Subject.ins.selectByID(SubID);
Line 82:         Header = ds.Tables[0].Rows[0]["fld_title"].ToString();
Line 83:         GradeName = ds.Tables[0].Rows[0]["Grade"].ToString();
Line 84: 

Source File: c:\Seraj-Server\seraj-website\Seraj\Exams.aspx.cs    Line: 82

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_Exams.FillHeader(String SubID) in c:\Seraj-Server\seraj-website\Seraj\Exams.aspx.cs:82
   Seraj_Exams.FillExams(String period) in c:\Seraj-Server\seraj-website\Seraj\Exams.aspx.cs:56
   ASP.seraj_exams_aspx.__DataBinding__control4(Object sender, EventArgs e) in c:\Seraj-Server\seraj-website\Seraj\Exams.aspx:114
   System.Web.UI.Control.OnDataBinding(EventArgs e) +100
   System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) +17
   System.Web.UI.Control.DataBindChildren() +248
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +195
   System.Web.UI.WebControls.Repeater.CreateItem(Int32 itemIndex, ListItemType itemType, Boolean dataBind, Object dataItem) +174
   System.Web.UI.WebControls.Repeater.AddDataItemsIntoItemsArray(IEnumerable dataSource, Boolean useDataSource) +291
   System.Web.UI.WebControls.Repeater.PostGetDataAction(IEnumerable dataSource) +109
   System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) +81
   Seraj_Exams.FillPeriod() in c:\Seraj-Server\seraj-website\Seraj\Exams.aspx.cs:64
   Seraj_Exams.Page_Load(Object sender, EventArgs e) in c:\Seraj-Server\seraj-website\Seraj\Exams.aspx.cs:42
   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