protected void btn_cat_Click(object sender, EventArgs e) { DataSet_categoryTableAdapters.categoryTableAdapter cta = new DataSet_categoryTableAdapters.categoryTableAdapter(); cta.Insert_category(txt_catname.Text); lbl_cat.Text = "موضوع با موفقیت ثبت گردید"; GridView1.DataBind(); txt_catname.Text = ""; }