how to edit perticular cell in a gv using single click ?

how to edit the perticular cell without using button... if i click the the perticular cell so data should be updated .. Design page-- code--- protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { DataTable dt = new DataTable(); dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id"), new DataColumn("Name"), new DataColumn("City") }); dt.Rows.Add(1, "Anamika", "Bangalore"); dt.Rows.Add(2, "Sunny", "Chennai"); dt.Rows.Add(3, "Monika", "Bangalore"); dt.Rows.Add(4, "Jyoti", "Chennai"); gridview1.DataSource = dt; gridview1.DataBind(); } } protected void gridview1_OnRowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { for (int i = 0; i < e.Row.Cells.Count; i++) { TextBox txt = new TextBox(); txt.Text = e.Row.Cells[i].Text; e.Row.Cells[i].Text = ""; e.Row.Cells[i].Controls.Add(txt); } } } }