protected void Button1_Click(object sender, EventArgs e)
{
GridView_Purchase_BookList.DataSource = TransLogic.Searched(TextBox1.Text);
GridView_Purchase_BookList.DataBind();
}
protected void Button3_Click(object sender, EventArgs e)
{
GridView1.EditIndex = -1;
GridView1.DataSource = TransLogic.Searched(TextBox3.Text);
GridView1.DataBind();
}