C# How to check if any datagridview checkbox is check

Question

I want to fire an event when any of the datagridviewcheckbox is checked. I tried the foreach but it only trigger when all the datagridviewcheck is checked. I want to fire an event if any of the datagridviewcheckboxcell is checked.

foreach (DataGridViewRow row in dgvLocal.Rows)
{
    if ((Convert.ToBoolean(row.Cells[0].Value) == true))
    {
        //
    }               
}

What is "triggering" this foreach? I think we're missing some context here. — Broots Waymb
– Broots Waymb, Commented Sep 24, 2018 at 12:40
That code looks like it will do something when it finds the first item that's checked, you only need a break inside the if so it stops checking when one is found. If you have that, then there must be something else. — littlerufe
– littlerufe, Commented Sep 24, 2018 at 12:41
I just want to show a messagebox when I check any checkboxcell in datagridview. — Kcird
– Kcird, Commented Sep 24, 2018 at 12:49

Sreenath Ganga · Accepted Answer · 2018-09-24 12:54:53Z

Use the cellcontentclicked event of the datagridview Also use the CurrentCellDirtystateChanged to make sure the last click is commited

  void grd_CurrentCellDirtyStateChanged(object sender, EventArgs e)
            {
                if (grd.IsCurrentCellDirty)
                    grd.CommitEdit(DataGridViewDataErrorContexts.Commit);
            }


    private void grd_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {


            if (e.ColumnIndex == 1) //compare to checkBox column index
            {
                DataGridViewCheckBoxCell cbx = (DataGridViewCheckBoxCell)grd[e.ColumnIndex, e.RowIndex];
                if (!DBNull.Value.Equals(cbx.Value) && (bool)cbx.Value == true)
                {
                    //checkBox is checked - do the code in here!
                }
                else
                {
                    //if checkBox is NOT checked (unchecked)
                }
            }
        }

PrathapG · Accepted Answer · 2018-09-26 07:34:57Z

0

Try this out

foreach (DataGridViewRow row in dataGridView1.Rows)
{
 DataGridViewCheckBoxCell check = (DataGridViewCheckBoxCell)row.Cells[1];
 if (check.Value  == check.TrueValue)
  {
    //dosomething
  }
 else
  {
   //dosomething
  }
}

edited Sep 26, 2018 at 7:34

answered Sep 24, 2018 at 13:58

PrathapG

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2 Comments

Kcird Over a year ago

Error 5 Operator '==' cannot be applied to operands of type 'object' and 'bool' C:\Users\MOMO\Desktop\MLQ System 9.26\MLQ SYTSTEM 9.26\MLQSystem\UpdateVisitors.cs 924 21 MLQSystem

PrathapG Over a year ago

try to use '=' instead of '=='

yogibaba · Accepted Answer · 2018-09-26 07:40:58Z

0

Trigger CellValueChanged

private void dgvProducts_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        if (dgvProducts.DataSource != null)
        {
            if (dgvProducts.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() == "True")
            {
                //do something
            }
            else
            {
               //do something
            }
        }
    }

answered Sep 26, 2018 at 7:40

yogibaba

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