C# DataGridView 更改类型 重绘

DataGridView   更改类型

需要用到重绘

            DataGridViewTextBoxColumn aa01 = new DataGridViewTextBoxColumn();
            aa00.DataPropertyName = "题目"; //绑定数据源的名称
            aa00.HeaderText = "题目00000";  //显示的名称
            aa00.Name = "题目"; //列的名称
            dataGridView1.Columns.Insert(1, aa01);

//绑定重绘事件

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            try
            {
                int index = dataGridView1.Columns["题目"].Index;  //获取列的索引值
                if (e.ColumnIndex == index) // ColumnIndex 正在格式化单元格的索引
                {
                    //类型名称 DataGridViewCellFormattingEventArgs //全名System.Windows.Forms.DataGridViewCellFormattingEventArgs
                    var t = e.GetType();
                    //e.DesiredType  //只读
                    //e.Value //可读可写

                    e.Value = "✔";
               }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

数据源

            DataTable dt = new DataTable();
            dt.Columns.Add("科目名称", typeof(string));
            dt.Columns.Add("题目", typeof(bool));

            DataRow dr = dt.NewRow();
            dr["科目名称"] = "000";
            dr["题目"] = true;
           
            dt.Rows.Add(dr);
            dataGridView1.DataSource = dt;