protected void gdvtweet_RowUpdating(object sender, GridViewUpdateEventArgs e) { int id = Convert.ToInt32(gdvtweet.DataKeys[e.RowIndex].Value.ToString()); int index = gdvtweet.EditIndex; GridViewRow row = gdvtweet.Rows[index]; TextBox uptweet = row.FindControl("TextBox1") as TextBox; m.UpdTweet(id, uptweet.Text); gdvtweet.EditIndex = -1; List <Tweet> twee = m.getTweet(per.user_id); gdvtweet.DataSource = twee; gdvtweet.DataBind(); }