DataGridView with a checkbox with default value checked

Question

I have a dataGridView in a Winform, I added to the datagrid a column with a checkbox using a code I saw here :

    DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();
    {
        column.HeaderText = "Export";
        column.Name = "Export";
        column.AutoSizeMode =
            DataGridViewAutoSizeColumnMode.DisplayedCells;
        column.FlatStyle = FlatStyle.Standard;
        column.CellTemplate = new DataGridViewCheckBoxCell(false);
        column.CellTemplate.Style.BackColor = Color.White;
    }

    gStudyTable.Columns.Insert(0, column);

this works but I want the checkBox to be checked as a default saw I added :

    foreach (DataGridViewRow row in gStudyTable.Rows)
    {                
        row.Cells[0].Value = true;
    }

but the checkbox col is still unchecked. I'm using a collection as my data source and I change the value of the col after I added the data source.

You could try changing the the data source's collection instead of the cell value itself. Something like `dataSourceCollection[0].Export = true` etc... — kor_, Dec 10 '12 at 06:56
you can set checkbox value to true whenever your datagrid DataBindingComplete event raised : http://social.msdn.microsoft.com/Forums/en/csharplanguage/thread/2c7fe077-095e-472f-9833-c0633eb7035f — Mate, Dec 10 '12 at 07:11
Related [Check/Uncheck a checkbox on datagridview](http://stackoverflow.com/q/13338837/1577396) — Mr_Green, Dec 10 '12 at 08:11

score 12 · Accepted Answer · edited Jun 25 '20 at 06:14

12

I think there is no way of setting the checked value on column declaration. You will have to iterate through the rows checking it after datasource is set (for example in DataBindingComplete event):

for (int i = 0; i < dataGridView1.Rows.Count -1; i++)
{
dataGridView1.Rows[i].Cells[0].Value = true;
}

With your column name:

for (int i = 0; i < dataGridView1.Rows.Count -1; i++)
{
   dataGridView1.Rows[i].Cells["Export"].Value = true;
}

edited Jun 25 '20 at 06:14

Daniel

398
2
16

answered Dec 10 '12 at 07:10

Carlos Landeras

11,025
11
56
82

2

It applies to all rows except the last one. Please Change the for loop to: for (int i = 0; i < dataGridView1.Rows.Count; i++), without -1 – dsmyrnaios Oct 24 '16 at 12:05

score 3 · Answer 2 · answered Dec 10 '12 at 07:19

3

Try to do it like this:

foreach (DataGridViewRow row in dgv.Rows)     
{
    row.Cells[CheckBoxColumn.Name].Value = true;     
}

answered Dec 10 '12 at 07:19

Sylca

2,523
4
31
51

score 1 · Answer 3 · answered Nov 20 '18 at 09:36

Make sure your DataGridView is shown when you set the value of your DataGridViewCheckBoxCells: I had mine in the second tab of a TabControl and the cells were always unchecked after initialization. To solve this, I had to move cell initialization to TabControl's SelectedIndexChanged event.

private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (this.tabControl1.SelectedIndex == 1)
    {
        foreach (DataGridViewRow row in this.myGridView.Rows)
        {
            ((DataGridViewCheckBoxCell)row.Cells[0]).Value = true;
        }
    }
}

score 0 · Answer 4 · answered May 22 '13 at 11:20

0

You can use datatable and create columns in datagridview and then add rows, provided first column value as 'True' or 'False' for each row.

try this

answered May 22 '13 at 11:20

Degoldeni

1

score 0 · Answer 5 · answered Jul 05 '13 at 17:22

0

if ((bool)this.dataGridView2.Rows[i].Cells[0].FormattedValue == true)

answered Jul 05 '13 at 17:22

nadeera

1

1

You probably want to put short answers like this as comments in the future. – Keith Smiley Jul 05 '13 at 17:40

score 0 · Answer 6 · answered Sep 14 '16 at 14:01

0

During or after load the value in a grid, for check the value in grid use this code and set the properties of grid column

foreach (DataGridViewRow row in dataGridView.Rows)
{
    row.Cells[0].Value = 1;
}

answered Sep 14 '16 at 14:01

daniele3004

13,072
12
67
75

score 0 · Answer 7 · edited Nov 15 '21 at 12:46

0

Have a look at the properties within your .xsd file for the table format:

Then make sure you set the default value to something sensible:

It will then automatically set the default value to the binding source.

edited Nov 15 '21 at 12:46

Draken

3,134
13
34
54

answered Nov 14 '21 at 22:42

Phill

1

score -2 · Answer 8 · edited Mar 09 '17 at 17:39

-2

An easy way is to use the property NewRowIndex as shown below:

dvgInvoiceItems.Rows[dvgInvoiceItems.NewRowIndex-1].Cells[5].Value = true;
dvgInvoiceItems.Rows[dvgInvoiceItems.NewRowIndex-1].Cells[6].Value = true;

edited Mar 09 '17 at 17:39

FelixSFD

6,052
10
43
117

answered Mar 09 '17 at 16:31

user5229434

1

DataGridView with a checkbox with default value checked

8 Answers8