Export Excel with Updated Column Value

[Joe]

Hi,
I'm trying to export a grouped grid to excel. Only one issue left...

In RadGrid1_ItemDataBound I change the value of a column "totalseconds" from a number (92) to a string (1:32). Basically I'm converting seconds to a minute string. When I export to Excel, the column "totalseconds" spits out a bunch of zeros, instead of the updated value. The zeroes are not even the correct "original" values.

I think the question is... how do I maintain the updated value, from ItemDataBound, when exporting to Excel? I tried changing the value in ItemCreated and PreRender, but that didn't seem to work either. I have also tried everything in "Exporting Tips and Tricks" to no avail.

Here's the relevant code:

 

<telerik:radgrid AllowSorting="true" AutoGenerateColumns="false" AllowFilteringByColumn="False"
            AllowPaging="true" PageSize="20" id="RadGrid1" Skin="Gray" runat="server" OnExcelExportCellFormatting="RadGrid1_ExcelExportCellFormatting">
            <MasterTableView>
               <GroupByExpressions>
                 <telerik:GridGroupByExpression>
                   <SelectFields>
                       <telerik:GridGroupByField FieldAlias="Activity" FieldName="daterounded" FormatString="{0:D}" HeaderValueSeparator=" from date: "></telerik:GridGroupByField>
                   </SelectFields>
                   <GroupByFields>
                       <telerik:GridGroupByField FieldName="daterounded" SortOrder="Descending"></telerik:GridGroupByField>
                   </GroupByFields>
                 </telerik:GridGroupByExpression>
                </GroupByExpressions>
                <SortExpressions>
                    <telerik:GridSortExpression FieldName="dateadded" SortOrder="Descending" />
                </SortExpressions>
                <Columns>
                    <telerik:GridBoundColumn DataField="dateadded" UniqueName="dateadded" HeaderText="Activity Date (EST)" />
                    <telerik:GridBoundColumn DataField="title" UniqueName="title" HeaderText="Lesson Title" />
                    <telerik:GridBoundColumn DataField="status" UniqueName="status" HeaderText="Lesson Status" />
                    <telerik:GridBoundColumn DataField="totalseconds" UniqueName="totalseconds" HeaderText="Total Time" />
                </Columns>
            </MasterTableView>
</telerik:radgrid>

 

Private Sub RadGrid1_NeedDataSource(ByVal [source] As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs)_ Handles RadGrid1.NeedDataSource
        ' Populate RadGrid from DB
End Sub

Private Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemDataBound
        If TypeOf e.Item Is GridDataItem Then
            Dim item As GridDataItem = e.Item
            Dim totalseconds As Integer = CInt(item("totalseconds").Text)
            Dim totaltime As String = formatTime(totalseconds) 'formatTime returns a string
            item("totalseconds").Text = totaltime
        End If
End Sub

Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnExport.Click
        RadGrid1.ExportSettings.ExportOnlyData = True
        RadGrid1.ExportSettings.IgnorePaging = True
        RadGrid1.ExportSettings.OpenInNewWindow = True
        RadGrid1.MasterTableView.ExportToExcel()
End Sub

Any ideas?
Thanks,
Joe

[Yavor]

Hi Joe,

When exporting, the grid control will export the data from the underlying datasource.
Having this in mind, one possible option in this case, would be to use the NeedDataSource event handler, and pass a temporary datasource, which contains the formatted data. This way, it will be reflected when exported under excel.
I hope this suggestion helps.

All the best,
Yavor
the Telerik team

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[Joe]

That makes sense. I'll give it a go...
Thanks Yavor,
Joe