"Scott Mitchell [MVP]" <mitchell@4guysfromrolla.com> wrote in message
news:Nmyfd.487$zx1.66@newssvr13.news.prodigy.com...
> Joel, the DataItem is only not-null during the visit when you call the
> DataBind() method. I am assuming when the SelectedIndexChanged event
> handler is running, it's on a postback, and you are only binding the data
> to the grid on the first page load, no? This is why DataItem is null in
> the SelectedIndexChanged event handler.
>
> Typically what is done is the DataKeyField property is set to the primary
> key field of the data being displayed in the grid. Then, in the
> SelectedIndexChanged event handler, you could get the primary key field,
> then hit the database and get the detailed information about this row.
>
> hth
>
>
> Joel Lyons wrote:
>> The help pages make it look like the DataGridItem.DataItem property would
>> return a row from the bound table. Like so:
>>
>> //(during setup)
>> myGrid.DataSource = myDataset.MyTable;
>> myGrid.DataBind();
>>
>> //(in OnSelectedIndexChanged)
>> MyTableRow row = myGrid.SelectedItem.DataItem as MyTableRow;
>> myLabel.Text = "You selected: " + row.Name;
>>
>>
>> But this doesn't work! The DataItem property always returns null (so the
>> cast does also). Am I using this correctly? Is there a different way to
>> retrieve the DataSet row that was bound to the Grid row?
>
>
> --
>
> Scott Mitchell
> mitchell@4guysfromrolla.com
> http://www.4GuysFromRolla.com
>
> * When you think ASP.NET, think 4GuysFromRolla.com!

Joel Lyons wrote:
> The help pages make it look like the DataGridItem.DataItem property would
> return a row from the bound table. Like so:
>
> //(during setup)
> myGrid.DataSource = myDataset.MyTable;
> myGrid.DataBind();
>
> //(in OnSelectedIndexChanged)
> MyTableRow row = myGrid.SelectedItem.DataItem as MyTableRow;
> myLabel.Text = "You selected: " + row.Name;
>
>
> But this doesn't work! The DataItem property always returns null (so the
> cast does also). Am I using this correctly? Is there a different way to
> retrieve the DataSet row that was bound to the Grid row?