Datagridview checkbox checked when clicking the cell

问题

I handle my checkbox click event with the CurrentCellDirtyStateChanged. What I want to be able to do is handle the same event when I click the cell that contains the checkbox too, i.e. when I click the cell, check the checkbox and call the DirtyStateChanged. Using the following code does not help much, it does not even call the CurrentCellDirtyStateChanged. I've run out of ideas.

private void dataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
{
    if(dataGridView.Columns[e.ColumnIndex].ReadOnly != true)
    {       
          //option 1
          (dataGridView.CurrentRow.Cells[e.ColumnIndex] as DataGridViewCheckBoxCell).Value = true;
          //option 2
          DataGridViewCheckBoxCell cbc = (dataGridView.CurrentRow.Cells[e.ColumnIndex] as DataGridViewCheckBoxCell);
          cbc.Value = true;
          //option 3
          dataGridView.CurrentCell.Value = true;
    }

}

回答1:

As Bioukh points out, you must call NotifyCurrentCellDirty(true) to trigger your event handler. However, adding that line will no longer update your checked state. To finalize your checked state change on click we'll add a call to RefreshEdit. This will work to toggle your cell checked state when the cell is clicked, but it will also make the first click of the actual checkbox a bit buggy. So we add the CellContentClick event handler as shown below and you should be good to go.

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
  DataGridViewCheckBoxCell cell = this.dataGridView1.CurrentCell as DataGridViewCheckBoxCell;

  if (cell != null && !cell.ReadOnly)
  {
    cell.Value = cell.Value == null || !((bool)cell.Value);
    this.dataGridView1.RefreshEdit();
    this.dataGridView1.NotifyCurrentCellDirty(true);
  }
}

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
  this.dataGridView1.RefreshEdit();
}

回答2:

This should do what you want :

private void dataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
{
    if(dataGridView.Columns[e.ColumnIndex].ReadOnly != true)
    {       
        dataGridView.CurrentCell.Value = true;
        dataGridView.NotifyCurrentCellDirty(true);
    }
}

回答3:

private void dataGridView3_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (e.ColumnIndex == dataGridView3.Columns["Select"].Index)//checking for select click
        {
            dataGridView3.CurrentCell.Value = dataGridView3.CurrentCell.FormattedValue.ToString() == "True" ? false : true;
            dataGridView3.RefreshEdit();
        }
    }

These Changes had Worked for me!

来源：https://stackoverflow.com/questions/29398941/datagridview-checkbox-checked-when-clicking-the-cell

标签

winforms

checkbox

datagridview

checked