Edit Data in GridView

bound the Gridview to the database,Now I want that in each row edit link is there,When i click on dat,then the data of data row comes to edit mode...


SOURCE TAB

Code:

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  <asp:GridView ID="GridView1" runat="server"  onrowediting="GridView1_RowEditing"  AutoGenerateColumns="False">
                        <Columns>
                            <asp:BoundField HeaderText="SNo" DataField ="UID" />
                            <asp:BoundField HeaderText="First Name" DataField ="FirstName" />
                            <asp:BoundField HeaderText="Last Name"  DataField ="LastName" />
                            <asp:BoundField HeaderText="EMail"  DataField ="EMail" />
                            <asp:BoundField HeaderText="Address" DataField ="Address" />
                            <asp:BoundField HeaderText="Phone No"  DataField ="PhoneNo" />
                            <asp:TemplateField >
                            <ItemTemplate>
                    <asp:LinkButton ID="lnkEdit" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" ></asp:LinkButton>
                </ItemTemplate>
                </asp:TemplateField>
                        </Columns>
                    </asp:GridView>

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CODE BEHIND

Code:

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data .SqlClient ;

public partial class FrmShowData1 : System.Web.UI.Page
{
    string Query;
    SqlCommand cmd;
    SqlConnection conn;
 
 

    protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            if (!IsPostBack)
            {
                OpenSQLConnection();
                Query = "SELECT * FROM Info1";
                cmd = new SqlCommand(Query, conn);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();
                da.Fill (ds);
                GridView1.DataSource = ds;
                GridView1.DataBind();
            }
        }

        catch (Exception ex)
        {
            Label1.Text = ex.Message.ToString();
        }

    }

    private void OpenSQLConnection()
    {
        try
        {
            conn = new SqlConnection("Data Source=SONIA-B408A4159\\SQLEXPRESS;Initial catalog=Sonia;Integrated Security=true;");
            conn.Open();
        }
        catch (Exception ex)
        {
            Label1 .Text = ex.Message.ToString();
        }

    }
 
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
    }
   
 
}

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When i click on the edit link,then firstly page is postbacked,& when i click again,then in current row textboxes come,but i also want the data to come in textboxes of the current cell....Can someebody tell me ,how to have data in textboxes???