Filter GridView in .Net - ASP.Net

This tutorial is about how to add filter in gridview  in asp.net. It is very simple.
First you bind the GridView with database. if you not know how to bind than check the following tutorial:
http://developerqueries.blogspot.com/2012/08/display-data-in-gridview-from-database.html
Now add the DropDownList and fill it with all alphabets.

DropDownList

After that add another GridView. And on the selected index changed event of the DropDownList write following code:

DataTable dt = new DataTable();

        dt.Columns.Add("ID");

        dt.Columns.Add("Name");

        dt.Columns.Add("Father");

        int count = 0;

        for (int i = 0; i < GridView1.Rows.Count; i++)

        {

            if (GridView1.Rows[i].Cells[1].Text.StartsWith(DropDownList1.SelectedItem.Text.ToLower()))

            {

                DataRow dr = dt.NewRow();

                dr["ID"] = GridView1.Rows[i].Cells[0].Text;

                dr["Name"] = GridView1.Rows[i].Cells[1].Text;

                dr["Father"] = GridView1.Rows[i].Cells[2].Text;

                dt.Rows.Add(dr);

                count++;

            }

        }

        if (count == 0)

        {

            Response.Write("No Record Found.....!");

            GridView1.Visible = true;

            GridView2.Visible = false;

        }

        else

        {

            GridView1.Visible = false;

            GridView2.Visible = true;

            GridView2.DataSource = dt;

            GridView2.DataBind();

        }

Now run the project and select the item from the DropDownList.

Filterd Record

Record not found