Datagridview 添加checkbox列，並判斷Datagridview 中的checkbox列是否被選中

Solution1:
//In Fill DataGridViewEvent :

DataGridViewCheckBoxColumn ChCol = new DataGridViewCheckBoxColumn();
ChCol.Name = "CheckBoxRow";
ChCol.HeaderText = "CheckboxSelection";
ChCol.Width = 50;
ChCol.TrueValue = "1";
ChCol.FalseValue = "0";
datagridview_tabpage1.Columns.Insert(0, ChCol);

// In Button Event put these codes:

datagridview 中的checkbox列是否被選中

private void button3_Click(object sender, EventArgs e)
{
string selectRows="";
for (int i = 0; i < dataGridView_tabPage1.Rows.Count - 1; i++) //循環datagridview每行
{
if ((bool)dataGridView_tabPage1.Rows[i].Cells[0].EditedFormattedValue == true)
{
selectRows = selectRows + "[" + i.ToString() + "]";

}
}

MessageBox.Show("Selected Rows:" + selectRows,"CheckBoxRows");

}

add check box in Datagridview

   // Initialize and add a check box column.
            DataGridViewColumn column = new DataGridViewTextBoxColumn();
            column = new DataGridViewCheckBoxColumn();
            column.DataPropertyName = "selection";
            column.Name = "selection";
            dataGridView_tabPage1.Columns.Add(column);

 

全選

  //循環dataGridView
   for (int i = 0; i < dataGridView_tabPage1.Rows.Count; i++)
   {
       //設置設置每一行的選擇框爲選中，第一列爲checkbox
      dataGridView_tabPage1.Rows[i].Cells[0].Value = true;
   }

反選

//循環dataGridView
for (int i = 0; i <dataGridView_tabPage1.Rows.Count; i++)
{
//判斷當前行是否被選中
  if ((bool)dataGridView_tabPage1.Rows[i].Cells[0].EditedFormattedValue == true)
      //設置每一行的選擇框爲未選中
    dataGridView_tabPage1.Rows[i].Cells[0].Value = false;
  else
     //設置每一行的選擇框爲選中
     dataGridView_tabPage1.Rows[i].Cells[0].Value = true;
 }