dataGridView DataGridViewCheckBoxColumn 列的选择与反选择

 注意设置 DataGridViewCheckBoxColumn 列的TrueValue 和 FalseValue 值分别为  true,false

    private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        { 
          
            if (e.RowIndex!=-1)
            {
                bool t = false;
                if (this.dataGridView1.Rows[e.RowIndex].Cells[0].Value != null)
                {
                    t = this.dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString()=="true"?true:false;
                     t = !t;
                    this.dataGridView1.Rows[e.RowIndex].Cells[0].Value = t;
                }
           }
        }