protected void Button1_Click(object sender, EventArgs e)
{
switch (DropDownList1.SelectedValue)
{
case "1":
GridView1.DataSource = admin.memSelUsername(TextBox1.Text.ToString());
GridView1.DataBind();
break;
case "2":
GridView1.DataSource = admin.memSelName(TextBox1.Text.ToString());
GridView1.DataBind();
break;
}
}