datagrid column widths - remember after postback

[wh1974]

I'm not sure if i'm heading in the right direction so would appreciate
any comments on what I'm trying to do.

Basically I have a DataGrid on a page which has columns whose width's I
set in the DataGrid's ItemCreated event and which need to be remembered
after a postback.

I bind to the DataGrid in the Page_Load event when PostBack is false.

The DataGrid displays the data horizontally so I set the RepeatColumns
property as so:

MyDataGrid.Repe atColumns = m_MyDataTable.R ows.Count;
MyDataGrid.Data Source = m_MyDataTable;
MyDataGrid.Data Bind();

The DataTable that I am binding to the grid contains a field that I
need to use to set the width of each column in the DataGrid:

private void ColumnList_Item Created(...)
{
// ...
DataRowView rv = (DataRowView) e.Item.DataItem ;
int colWidth = Convert.ToInt32 (rv["ColWidth"].ToString());
e.Item.Width = Unit.Pixel(colW idth);
}

This works when the page is first loaded.

However, upon postback i'm not binding to the DataGrid again so the
code in the ItemCreated event doesn't work as there is no DataItem
attached.

The reason I am unable to bind to the DataGrid upon postback is because
the grid contains further usercontrols whose viewstate needs to be
remembered. By binding to the grid every time the page is loaded, the
viewstate of individual usercontrols appears to be lost.
Any help would be appreciated,
Thanks,
Wayne.

[Fernando Hunth]

RE: datagrid column widths - remember after postback

Do it on the ItemDataBound Event and be sure to work the ViewState on your
control.




Fernando Hunth
Senior Developer
Huddle Group S.A.
fernando@huddle .com.ar



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"wh1974" wrote:
[color=blue]
> I'm not sure if i'm heading in the right direction so would appreciate
> any comments on what I'm trying to do.
>
> Basically I have a DataGrid on a page which has columns whose width's I
> set in the DataGrid's ItemCreated event and which need to be remembered
> after a postback.
>
> I bind to the DataGrid in the Page_Load event when PostBack is false.
>
> The DataGrid displays the data horizontally so I set the RepeatColumns
> property as so:
>
> MyDataGrid.Repe atColumns = m_MyDataTable.R ows.Count;
> MyDataGrid.Data Source = m_MyDataTable;
> MyDataGrid.Data Bind();
>
> The DataTable that I am binding to the grid contains a field that I
> need to use to set the width of each column in the DataGrid:
>
> private void ColumnList_Item Created(...)
> {
> // ...
> DataRowView rv = (DataRowView) e.Item.DataItem ;
> int colWidth = Convert.ToInt32 (rv["ColWidth"].ToString());
> e.Item.Width = Unit.Pixel(colW idth);
> }
>
> This works when the page is first loaded.
>
> However, upon postback i'm not binding to the DataGrid again so the
> code in the ItemCreated event doesn't work as there is no DataItem
> attached.
>
> The reason I am unable to bind to the DataGrid upon postback is because
> the grid contains further usercontrols whose viewstate needs to be
> remembered. By binding to the grid every time the page is loaded, the
> viewstate of individual usercontrols appears to be lost.
> Any help would be appreciated,
> Thanks,
> Wayne.
>
>[/color]