private void CreateDataGrid()
{
// Set DataGrid properties
DataGrid1.AutoGenerateColumns = false;

// Get a DataSet object filled with data
DataSet ds = DB.GetDataSet();

// Create ID column & add to DataGrid
BoundColumn col = new BoundColumn();
col.HeaderText="User ID";
col.DataField="ID";
DataGrid1.Columns.Add(col);

// Create Name column & add to DataGrid
col = new BoundColumn();
col.HeaderText="User Name";
col.DataField="Name";
DataGrid1.Columns.Add(col);

// Create Address column & add to DataGrid
col = new BoundColumn();
col.HeaderText="User Address";
col.DataField="Address";
DataGrid1.Columns.Add(col);

// DataGrid data binding
DataGrid1.DataSource = ds.Tables[0];
DataGrid1.DataBind();
}

private void FillColumnsList(DataGrid grid)
{
foreach (DataGridColumn col in grid.Columns)
{
ColumnsList.Items.Add(col.HeaderText);
}
}

private void HideDataGridColumn(int index, bool show)
{
DataGrid1.Columns[index].Visible = show;
}

private void HideColumnBtn_Click(object sender, System.EventArgs e)
{
HideDataGridColumn(ColumnsList.SelectedIndex, false);
this.DataBind();
}
private void ShowColumnBtn_Click(object sender, System.EventArgs e)
{
HideDataGridColumn(ColumnsList.SelectedIndex, true);
this.DataBind();
}