[Solved] Postback removes template columns

[VS]

Hi,

I am dynamically creating a radgrid as,

protected

void Page_Load(object sender, EventArgs e)

 

{

 

if (!Page.IsPostBack)

 

{

rgTest.AutoGenerateColumns =

false;

 

 

GridBoundColumn boundColumn;

 

 

GridButtonColumn btnColOk;

 

 

GridButtonColumn btnColCancel;

 

 

GridTemplateColumn templateColumn;

 

dt = GetDataSource();

ViewState[

"dt"] = dt;

 

 

for (int i = 0; i < dt.Columns.Count - 1; i++)

 

{

 

if (i == 0)

 

{

boundColumn =

new GridBoundColumn();

 

rgTest.MasterTableView.Columns.Add(boundColumn);

boundColumn.DataField = dt.Columns[i].ColumnName;

boundColumn.HeaderText = dt.Columns[i].ColumnName;

}

 

if (i > 0)

 

{

templateColumn =

new GridTemplateColumn();

 

rgTest.MasterTableView.Columns.Add(templateColumn);

templateColumn.ItemTemplate =

new GridTemplate(dt.Columns[i].ColumnName);

 

templateColumn.HeaderText = dt.Columns[i].ColumnName;

templateColumn.DataField = dt.Columns[i].ColumnName;

 

 

btnColOk =

new GridButtonColumn();

 

rgTest.MasterTableView.Columns.Add(btnColOk);

btnColOk.UniqueName =

"btnColOk";

 

btnColOk.ButtonType =

GridButtonColumnType.ImageButton;

 

btnColOk.ImageUrl =

@"~\Images\tick.png";

 

btnColOk.CommandName =

"btnColOk_Click";

 

 

btnColCancel =

new GridButtonColumn();

 

rgTest.MasterTableView.Columns.Add(btnColCancel);

btnColCancel.ButtonType =

GridButtonColumnType.ImageButton;

 

btnColCancel.ImageUrl =

@"~\Images\delete.png";

 

btnColCancel.Visible =

false;

 

 

}

}

}

}

It works perfect. But when i click on the image button, the postback removes all template columns?

Can anyone help, what am i doing wrong?

Thanks

[Princy]

Hi,

"Creating columns in the Page_Load event handler does not work for template columns. For the controls inside a template to persist their ViewState, the grid must be generated completely in the code-behind using the Page_Init event (see below). That way, template controls are instantiated before the LoadViewState event of the page."

You can refer to the link below to know more on Programmatic Creation

Thanks,
Princy