Index was out of range

[taree]

I get the below error
I have a field that I bound with the gridview. when the value for the row is the same I just only display one row and ignore the other until the row value is different.

     <asp:BoundField  DataField="lettingdate" HeaderText="Letting Date"  >           
              <HeaderStyle Wrap="False" />
            <ItemStyle Wrap="False" />
            </asp:BoundField>

             <asp:TemplateField HeaderText="View Abstract (PDF)">              
             <ItemTemplate>             
                    <asp:HyperLink ID="abstractPDF" runat="server"   Target="_blank" Text='<%# Eval("contractid","Abstract (PDF)") %>' > </asp:HyperLink>
             </ItemTemplate>
                  <HeaderStyle Wrap="False" />
                  <ItemStyle Wrap="False" />
             </asp:TemplateField>


Partial Class abstractMenu
    Inherits System.Web.UI.Page
    Private previousCat As String = ""
    Private firstRow As Integer = -1
    Dim dsabstract As New DataSet



Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index 
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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Source Error: 


Line 55: 
Line 56:             If previousCat = drv("lettingdate").ToString() Then
Line 57:                 If gvabstract.Rows(firstRow).Cells(0).RowSpan = 0 Then
Line 58:                     gvabstract.Rows(firstRow).Cells(0).RowSpan = 2
Line 59:                 Else
 

[code]

 

[ca8msm]

You are trying to access an item in an array (either the Rows or Cells collection) that does not exist. Have you tried stepping through using the debugger to find out which one (and therefore why)?

Mark,

Darlington Web Design[tab]|[tab]Experts, Information, Ideas & Knowledge[tab]|[tab]ASP.NET Tips & Tricks

 

[taree]

once I delete this line the code works fine. I wonder why though? can someone help to clarify this for me.
Handles gvabstract.RowDataBound





 Protected Sub gvabstract_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvabstract.RowDataBound

   <asp:GridView ID="gvabstract" runat="server"       
                    AutoGenerateColumns="False"  
                    GridLines="None" 
                    CssClass="mGrid"                             
                    HorizontalAlign="Left"    
                    OnRowDataBound = "gvabstract_RowDataBound"                      
                    AlternatingRowStyle-CssClass="alt" Width="100%" EnableModelValidation="True"

 

[ca8msm]

If you delete the "Handles gvabstract.RowDataBound" action, then that event will not be fired so it won't error as it isn't running your code...

Mark,

Darlington Web Design[tab]|[tab]Experts, Information, Ideas & Knowledge[tab]|[tab]ASP.NET Tips & Tricks

 

[taree]

Mark,

I removed the line "OnRowDataBound = "gvabstract_RowDataBound" from here

 <asp:GridView ID="gvabstract" runat="server"                           AutoGenerateColumns="False"                      GridLines="None"                     CssClass="mGrid"                                                 HorizontalAlign="Left"                                                                  AlternatingRowStyle-CssClass="alt" Width="100%" EnableModelValidation="True"

and added back to the event and works without any problem.

Protected Sub gvabstract_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvabstract.RowDataBound

 

[ca8msm]

If you had the OnRowDataBound="gvabstract_RowDataBound and Handles gvabstract.RowDataBound action set then the event would fire twice maybe causing problems.

I suggest you set some breakpoints in the debugger on the event in question to test all of this out for yourself.

Mark,

Darlington Web Design[tab]|[tab]Experts, Information, Ideas & Knowledge[tab]|[tab]ASP.NET Tips & Tricks