//5_1_a_s_p_x
private void GridviewBind()
{
string timeF = ddlyearF.SelectedItem.Text + "-" + ddlMonthF.SelectedItem.Text + "-" + "1";
string timeT = ddlYearT.SelectedItem.Text + "-" + ddlMonthT.SelectedItem.Text + "-" + "1";
string title = txtdocTitle.Text;
string column = ddlColumn.SelectedValue;
string keyword = txtKeywords.Text;
Doc dc = new Doc();
DataSet ds = dc.AllDoc(title, column, keyword, timeF, timeT);
lblCount.Text = Convert.ToString(ds.Tables[0].Rows.Count);
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}