protected void Button1_Click(object sender, EventArgs e) { dataclass d1 = new dataclass(); DataTable d2 = d1.getdate(TextBox1.Text); { if (d2.Rows.Count > 0) { GridView1.DataSource = d1.getdate(TextBox1.Text); GridView1.DataBind(); } else Response.Write("<script>alert('No data found on this date!')</script>"); TextBox1.Text = ""; } }