public void Showcolumns()
{
dgv_Question.Columns["IDCatalogue"].Visible = false;
dgv_Question.Columns["IDQuestion"].Visible = false;
dgv_Question.Columns["NameCatalogue"].Visible = false;
dgv_Question.Columns["AnswerContent"].Visible = false;
dgv_Question.Columns["Catalogue"].Visible = false;
dgv_Question.Columns["Date"].Visible = false;
dgv_Question.Columns["Sequence"].HeaderText = "STT";
dgv_Question.Columns["NameQuestion"].HeaderText = "Nội dung Câu Hỏi";
dgv_Question.Columns["TypeQuestion"].HeaderText = "Loại Câu Hỏi";
dgv_Question.Columns["QuestionTitle"].HeaderText = "Tên câu hỏi";
dgv_Question.Columns["Sequence"].ReadOnly = true;
dgv_Question.Columns["NameQuestion"].ReadOnly = true;
dgv_Question.Columns["TypeQuestion"].ReadOnly = true;
dgv_Question.Columns["QuestionTitle"].ReadOnly = true;
dgv_Question.Columns["Sequence"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
dgv_Question.Columns["TypeQuestion"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
dgv_Question.Columns["QuestionTitle"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
DataGridViewCheckBoxColumn CheckColumn = new DataGridViewCheckBoxColumn();
CheckColumn.Name = "Check";
dgv_Question.Columns.Add(CheckColumn);
dgv_Question.Columns["Check"].HeaderText = "Chọn";
dgv_Question.Columns["Check"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
}