Search + Sum + GridView + Edit

[met0555]

i fixed the code at this line, but still get error.

Protected Sub GridView1_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs)
        Dim GridView1 As GridView = TryCast(LoginView1.FindControl("GridView1"), GridView)
 
        Dim dt = GetCustDT()
 
        'Update the values.
        Dim row = GridView1.Rows(e.RowIndex)
        dt.Rows(row.DataItemIndex)("Client") = (CType((row.Cells(3).Controls(0)), TextBox)).Text
 
        GridView1.EditIndex = -1
 
 
    End Sub

The error i get now is

No row at position 0

#
Public Function GetCustDT() As DataTable
#
        Dim dt As New DataTable
#
        dt.Columns.Add("Id", GetType(String))
#
        dt.Columns.Add("Day", GetType(String))
#
        dt.Columns.Add("Date", GetType(String))
#
        dt.Columns.Add("Client", GetType(String))
#
        dt.Columns.Add("From-To", GetType(String))
#
        dt.Columns.Add("Collect", GetType(String))
#
        dt.Columns.Add("Via", GetType(String))
#
        dt.Columns.Add("Gross", GetType(String))
#
        dt.Columns.Add("In-House", GetType(String))
#
        dt.Columns.Add("Payouts", GetType(String))
#
        dt.Columns.Add("Expenses", GetType(String))
#
        dt.Columns.Add("Net", GetType(String))
#
        dt.Columns.Add("Status", GetType(String))
#
        dt.Columns.Add("Farm", GetType(String))
#
        Return dt
#
    End Function