Programmatically uncheck checkboxcolumn in datagridview

Question

How can I programmatically strip all rows in a DataGridViewCheckboxColumn in a datagridview?

I can get the correct checkbox value using

(bool)row.Cells[CheckBoxColumn.Index].FormattedValue

but this is just a getter.

I tried to set the cell value using

(bool)row.Cells[CheckBoxColumn.Index].value = false

but this does not affect FormattedValue.

How can i solve this?

Answer 1

You do. as:

(row.Cells[CheckBoxColumn.Index] as DataGridViewCheckBoxCell).value = false;

You just forgot to specify the correct type, the general DataGridViewCell does not know its value type.

Answer 2

Have you tried to set the first control in the checkbox column to set the checkbox and then set the Checked parameter to true?

Try something like that.

((DataGridViewCheckBoxCell)e.Rows[0].Cells[0]).Selected = true

Answer 3

, :

CheckBox cb = (row.Cells[CheckBoxColumn.Index].Controls[0] as CheckBox);
if(cb != null)
{
    cb.Checked = false;
}

Type may vary. Just debug and apply it to what is.

Answer 4

foreach (DataGridViewRow dr in dataGridView1.Rows)
{
  dr.Cells[0].Value = true;//sıfırın
}

Answer 5

If you use dataGridView1_ContextClick, just for do "false" datagidviewCheckBox Column you need this code:

dataGridView1.CancelEdit();

but if you need all the rows of the CheckBoxColumns DataGrid:

private void button1_Click(object sender, EventArgs e)
{
    foreach (DataGridViewRow r in dataGridView1.Rows)
    {
        r.Cells["statusBox"].Value = true;
    }
}

Answer 6

Scroll through each grid line and use the find control method:

foreach ( GridViewRow row in myGridView )
{
     CheckBox checkBox = ( CheckBox ) row.FindControl( "myCheckBox" );
     checkbox.Checked = false;
}

Answer 7

 foreach (DataGridViewRow row in datagridviewname.Rows)

  {
    row.Cells[CheckBoxColumn1_Name].Value = false;
  }