There is no row at position 3

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Hye, I use this code to convert gridview dataset into new datable.
Then when certain row for DEPT cell meets same condition as variable prodName,it will delete the datarow.
If dtDeleteSh contains only 1 row, this codes work. However datatable with more than 1 datarow will display an error "There is no row at position 1/2/3"

SQL

Dim dtDeleteSh As New DataTable
                         dtDeleteSh.Columns.Add("check")
                         dtDeleteSh.Columns.Add("DEPT")
                         dtDeleteSh.Columns.Add("NAME_T")
                         dtDeleteSh.Columns.Add("EMPID_T")



For shRow As Integer = 0 To gdShop.Rows.Count - 1

      Dim rowdeleteSh As DataRow = dtDeleteSh.NewRow()
      rowdeleteSh = dtDeleteSh.NewRow
      rowdeleteSh("check") = gdShop.Rows(shRow).Cells(0).Text
      rowdeleteSh("DEPT") = gdShop.Rows(shRow).Cells(1).Text
      rowdeleteSh("EMPID_T") = gdShop.Rows(shRow).Cells(2).Text
      rowdeleteSh("NAME_T") = gdShop.Rows(shRow).Cells(3).Text

      dtDeleteSh.Rows.Add(rowdeleteSh)

Next


For countSh As Integer = 0 To dtDeleteSh.Rows.Count - 1


     If prodName = dtDeleteSh.Rows(countSh)("DEPT").ToString Then
             dtDeleteSh.Rows(countSh).Delete()

     End If
Next


     gdShop.DataSource = dtDeleteSh
     gdShop.DataBind()

The error occurs here

If prodName = dtDeleteSh.Rows(countSh)("DEPT").ToString Then

Posted 28-Aug-12 15:39pm

snamyna

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Comments

dimpledevani 29-Aug-12 0:46am

when you are deleting a row the total number of rows in your datatable also changes so the error is valid as you are in a loop.Try to make a copy of your datatable and in for loop for assigning the max value use one table and delete rows in other table

1 solution

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Kuthuparakkal · Accepted Answer · 2012-08-28T17:35:00

Solution 1

try this c#, plz convert to VB.net, I did some conversion hints try:

C#

dtDeleteSh =   dtDeleteSh.AsEnumerable().Where(a => a["DEPT"].ToString()!=prodName ).CopyToDataTable();

Sample vb:(dont know it's correct syntax)

VB

dtDeleteSh = (From del In dtDeleteSh _
Where del!DEPT.ToString <> prodName _
Select del).CopyToDataTable()

the logic is select rows that are to keep and avoid the one's to delete and reassign this to existing datatable.

Posted 28-Aug-12 17:35pm

Kuthuparakkal

Updated 28-Aug-12 20:06pm

v4

Comments

snamyna 29-Aug-12 0:45am

By using remove row, The next function would not execute because the datatable is modified. Am I right?

Kuthuparakkal 29-Aug-12 1:56am

updated soln, plz check.. thats Linq method.

snamyna 31-Aug-12 3:08am

Thanks. :)

Kuthuparakkal 31-Aug-12 9:11am

You're welcome... did it help you ? if so mark answer