CODEWITHSUNDEEP
c#winformsdatagridviewcheckbox
user1647667
user1647667

Reputation: 1309

Check All Checkbox items on DataGridView

Here's the scenario.

I have checkbox(Name:"Check All" ID:chkItems) and datagridview. And when I click on this checkbox, all checkboxes on the datagridview will also be checked.

I've also added the checkbox column on the grid.

DataGridViewCheckBoxColumn CheckboxColumn = new DataGridViewCheckBoxColumn();
CheckBox chk = new CheckBox();
CheckboxColumn.Width = 20;
GridView1.Columns.Add(CheckboxColumn);

Here is the code behind of the checkbox. There is a problem on the row.Cell

private void chkItems_CheckedChanged(object sender, EventArgs e)
{
    foreach (DataGridViewRow row in GridView1.Rows)
    {
        DataGridViewCheckBoxCell chk = e.row.Cells(0);
        if (chk.Selected == false)
        {
            row.Cells(0).Value = true;
        }
    }
}

Upvotes: 7

Views: 68172

Answers (8)

Will-ty
Will-ty

Reputation: 1

This is my version, which allows a more natural behavior I'd say; if one of the checkboxes is ticked, all checkboxes are ticked as well when selecting all.

How it'll be usefull to you :)

private void BtnSelectAll_Click(object sender, EventArgs e)
    {
        List<Boolean> chkList = new List<Boolean>();
        bool ticked = false;
    
        foreach (DataGridViewRow row in dataGrid.Rows)
        {
            DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)row.Cells[0];
            chkList.Add((bool)chk.Value);
        }
    
        if (!chkList.Contains(true))
        {
            ticked = true;
        }
        else if (!chkList.Contains(false))
        {
            ticked = false;
        } else
        {
            ticked = true;
        }
    
        foreach (DataGridViewRow row in dataGrid.Rows)
        {
            DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)row.Cells[0];
            chk.Value = ticked;
        }
    }

Upvotes: 0

Hidayet R. Colkusu
Hidayet R. Colkusu

Reputation: 384

You can check all cells like this:

private void CheckAllCheckboxItemsOnDataGridView(int columnIndex)
{ 
    foreach (DataGridViewRow row in dgFiles.Rows)
    {
        DataGridViewCheckBoxCell cell = (DataGridViewCheckBoxCell)row.Cells[columnIndex];

        cell.Value = !(cell.Value == null ? false : (bool)cell.Value); 
    }
}

You can use method in CheckedChanged event like this:

private void chkItems_CheckedChanged(object sender, EventArgs e)
{
    CheckAllCheckboxItemsOnDataGridView(columnIndex: 0);
}

Upvotes: 0

Abdullah
Abdullah

Reputation: 1021

1- Create new button.

2- You can use the following code when click checkAll button

3- when click the button it will check all checkboxes in datagridview and when click again it will uncheck all boxes.

private void btncheckall_Click(object sender, EventArgs e)
        {
            foreach (DataGridViewRow row in dgvResult.Rows)
            {
                row.Cells[0].Value = row.Cells[0].Value == null ? false : !(bool)row.Cells[0].Value;
            }
        }

Note: in some cases you have to click in datagridview first then click the button.

Upvotes: 0

Ramgy Borja
Ramgy Borja

Reputation: 2458

Try this one

foreach (DataGridViewRow row in this.dataGridView1.Rows)
{
      row.Cells[0].Value = row.Cells[0].Value == false ? true : false;

}

Upvotes: 1

Elliott Marshall
Elliott Marshall

Reputation: 39

    private void setCheckBoxInDataGrid(DataGridView dgv, int pos, bool isChecked)
    {
        for (int i = 0; i < dgv.RowCount; i++)
        {
            dgv.Rows[i].DataGridView[pos, i].Value = isChecked;
        }
    }

This is how I did it

Upvotes: 3

Ata
Ata

Reputation: 1

I tried to select all checkbox or select it mutuality and calculate some value...so wrote this code that's maybe helpful.

foreach (DataGridViewRow item in DGDoc.Rows)
{
    if (item.Cells[0].Value == null)
        item.Cells[0].Value = "True";
    if (bool.Parse(item.Cells[0].Value.ToString()))
    {
        item.DefaultCellStyle.BackColor = System.Drawing.Color.FromArgb(241, 215, 215);
        strIDs += "," + item.Cells[1].Value.ToString();
        intSumPrice += Int64.Parse(item.Cells[4].Value.ToString());
        intSumTax += Int64.Parse(item.Cells[5].Value.ToString());
        intSumPay += Int64.Parse(item.Cells[6].Value.ToString());
    }
    else
    {
        item.DefaultCellStyle.BackColor = System.Drawing.Color.Empty;
    }
}
DGDoc.EndEdit();

Upvotes: 0

SALZZZ
SALZZZ

Reputation: 113

If you are okay with providing a default state to the checkboxes of datagridview on your own i.e either True or False[Do not assign a null state] state(Reason for doing this would be explained in the latter).

Which could be done by the following code,(type in this code when you search for results to be viewed in DataGridView)
dgv is the object of the DataGridView that you are using.

for (int i = 0; i < dgv.RowCount - 1; i++)
{
     dgv.Rows[i].DataGridView[0, i].Value = true;
}

Where DataGridView[0, i] indicates 0th column ith row
The Reason for doing this is,On load the checkbox is by default in a null state. The code isn't comparing for null state(Creating a object null reference exception). So, once when u assign it a state either a false or true . It can never undergo into null state.
Type in the following code inside the button_click_event using which you are going to check

for (int i = 0; i < dgv.RowCount-1; i++)
{
    if (dgv.Rows[i].Cells[0].Value.ToString() != "")
    {
        dgv.Rows[i].Cells[0].Value = false;
    }
    else
    {
        dgv.Rows[i].Cells[0].Value = true;
    }
}

It Worked for me, I hope it does for you.

Upvotes: 0

Nikola Davidovic
Nikola Davidovic

Reputation: 8656

DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell) row.Cells[0];

instead of 

DataGridViewCheckBoxCell chk = e.row.Cell(0);

*EDIT:*I think you really want to do this:

foreach (DataGridViewRow row in dataGridView1.Rows)
{
       DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell) row.Cells[0];
       chk.Value = !(chk.Value == null ? false : (bool) chk.Value); //because chk.Value is initialy null
}

Upvotes: 17

Related Questions