public void Showcolumns()
{
dataGridView1.Columns["IDCatalogue"].Visible = false;
dataGridView1.Columns["IDQuestion"].Visible = false;
dataGridView1.Columns["NameCatalogue"].Visible = false;
dataGridView1.Columns["AnswerContent"].Visible = false;
dataGridView1.Columns["Catalogue"].Visible = false;
//dataGridView1.Columns["TypeQuestion"].Visible = false;
dataGridView1.Columns["Date"].Visible = false;
dataGridView1.Columns["Sequence"].HeaderText = "STT";
dataGridView1.Columns["NameQuestion"].HeaderText = "Nội Dung Câu Hỏi";
dataGridView1.Columns["TypeQuestion"].HeaderText = "Loại Câu Hỏi";
//
dataGridView1.Columns["QuestionTitle"].HeaderText = "Tên câu hỏi";
dataGridView1.Columns["Sequence"].ReadOnly = true;
//
dataGridView1.Columns["QuestionTitle"].ReadOnly = true;
dataGridView1.Columns["NameQuestion"].ReadOnly = true;
dataGridView1.Columns["TypeQuestion"].ReadOnly = true;
dataGridView1.Columns["Sequence"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
dataGridView1.Columns["TypeQuestion"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
//
dataGridView1.Columns["QuestionTitle"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
DataGridViewCheckBoxColumn CheckColumn = new DataGridViewCheckBoxColumn();
CheckColumn.Name = "Check";
dataGridView1.Columns.Add(CheckColumn);
dataGridView1.Columns["Check"].HeaderText = "Chọn";
dataGridView1.Columns["Check"].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
}