I need to add Template column dynamically to datagrid in my webpart.
I am getting an error like TemplateColumn.ItemTemplate as NULL
Exception...Here is my code.

ProjectGrid.ItemDataBound += new
DataGridItemEventHandler(ProjectGrid_ItemDataBound);
TemplateColumn TempCol = new TemplateColumn();
Innerpan = new Panel();
Innerpan.ID = "innerpanel";
TempCol.ItemTemplate.InstantiateIn(Innerpan);


TempCol.ItemTemplate is Null in the above code.
"It may not be correct approach to add Template Column to DataGrid".

Please help me out and Give me different approach to ADD Template
Column.