how to add footer template dynamically in asp.net - asp.net

Question

I have created a gridview dynamically. There is template fields described in designing portion. All the columns were created thru code behind as follows. Its works fine. Here I can listed the pages for each rows. But I dont know how to implement the sum of pages in the footer template thru code behind.
TemplateField Pages = new TemplateField();
Pages.HeaderText = "Pages";
Pages.ItemTemplate = new GridViewTemplate_Pages();
gv1.Columns.Add(Pages);
public class GridViewTemplate_Pages : ITemplate
{
void ITemplate.InstantiateIn(Control container)
{
Label PagesLabel = new Label();
PagesLabel.DataBinding += new EventHandler(this.PagesLabel_DataBinding);
container.Controls.Add(PagesLabel);
}
void PagesLabel_DataBinding(object sender, EventArgs e)
{
Label lbl1 = (Label)sender;
GridViewRow row = (GridViewRow)lbl1.NamingContainer;
lbl1.Text = DataBinder.Eval(row.DataItem, "PagesReceived").ToString();
}
}
Given ShowFooter="True" in aspx page and RowDataBound written separately. The following code works fine if I given footer template in aspx page but do not know how to get the result in programmatically. Please advice.
protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
int RowTotalPages = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "PagesReceived"));
TotalPages = TotalPages + RowTotalPages;
}
if (e.Row.RowType == DataControlRowType.Footer)
{
Label m = (Label)e.Row.FindControl("gv1TotalPages");
m.Text = TotalPages.ToString();
}
}

Answer 1

You can create the footer to a gridview like this.
//Code
GridView gv = new GridView();
gv.RowCreated += delegate(object dsender, GridViewRowEventArgs ge)
{
if (ge.Row.RowType == DataControlRowType.Footer)
ge.Row.Cells[0].Text = "Something";
};
gv.AutoGenerateColumns = false;
gv.ShowFooter = true;
BoundField bf = new BoundField();
bf.HeaderText = "col 1";
bf.DataField = "Length";
gv.Columns.Add(bf);
gv.DataSource = new string[] { "One", "Two", "Three" };
gv.DataBind();
Form.Controls.Add(gv);
This is for the dynamically created gridview and a footer. You can change accordingly.

Answer 2

Its a silly thing. I made it complex. I need the sum of pages in the footer row, then why should I think and confuse about GridViewTemplate and Itemplate class. Simply I added the Total pages in the session and recollect it in the DataControlRowType.Footer. Here is the code:
protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
int RowTotalPages = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "PagesReceived"));
int RowTotalCharges = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "ChargesReceived"));
TotalPages = TotalPages + RowTotalPages;
TotalCharges = TotalCharges + RowTotalCharges;
Session.Add("TotalPages", TotalPages.ToString());
Session.Add("TotalCharges", TotalCharges.ToString());
}
if (e.Row.RowType == DataControlRowType.Footer)
{
e.Row.Cells[4].Text = "Batches Count: " + gv1.Rows.Count.ToString();
e.Row.Cells[5].Text = Session["TotalPages"].ToString();
e.Row.Cells[6].Text = Session["TotalCharges"].ToString();
}
}