Autogenerate edit in gridview

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C#

ASP.NET

i hav use autogenerate adit link in gridview.i have write code that ,when i click on edit link data on that line comes in textbox.here is my code.

int Editid =Convert.ToInt16(GridView1.DataKeys[e.NewEditIndex].Values[0].ToString());
           objdal.Editid=Editid;
           dv=objdal.Edit_Data();

           ddlGroupName.SelectedValue= dv.Table.Rows[0]["Groupid"].ToString();
           ddlName.SelectedValue = dv.Table.Rows[0]["Name"].ToString();
           txt_LeaveFrom.Text = dv.Table.Rows[0]["LeaveFrom"].ToString();
           txt_LeaveTo.Text = dv.Table.Rows[0]["LeaveTo"].ToString();

Edit_data() function.....

public DataView Edit_Data()
{

    cmd = new SqlCommand("LeaveForm_Select_Data", cnn);
    cmd.CommandType = CommandType.StoredProcedure;


    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataSet ds = new DataSet();
    da.Fill(ds);

    DataView dv = new System.Data.DataView();
    dv.Table = ds.Tables[0];
    return dv;




}

when i click on edit datacomes in textbox.but when i click on other edit link at the same time,Update and Cancle link autometicaly genrate at row which i have click first one.
what is solution for that.