datagridview with checkbox column

Question

i have a datagridview with checkbox column
i want to know the method that when i directly on check or uncheck the checkbox cell

to do my code

i wrote this code but it's didnt work

 

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)

{

 

if (e.ColumnIndex == 0)

{

 

if (Convert.ToBoolean(dataGridView1.Rows[e.RowIndex].Cells[0].Value) == false)

{

 

MessageBox.Show("you uncheck the row ="+e.RowIndex.ToString());

}

}

}

can any on help me

Answer 1

Hi,

Try the following links

http://social.msdn.microsoft.com/Forums/en-US/winformsdatacontrols/thread/07ac5acf-d8cd-4995-bdc8-1097206f9a2e

http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellclick.aspx

http://social.msdn.microsoft.com/Forums/en-US/winformsdatacontrols/thread/44bcbbb5-3c12-4fe0-a633-b889f71ba1b9

Hope it helps.

Regards,
A.Murugan

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Answer 2

Hi, make sure the cell *has* a value and ...

...(this will report the current state of the checkbox, so it will report when you change the state of the checkBox)

 

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            //maybe use a different ErrorContext
            if (e.RowIndex > -1 && this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value != null)
                MessageBox.Show(((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex]).GetEditedFormattedValue(e.RowIndex, DataGridViewDataErrorContexts.Formatting).ToString());
        }

Regards,

  Thorsten

Answer 3

... respectively (works also if the value previously was null):

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            //maybe use a different ErrorContext
            if (e.RowIndex > -1)
                MessageBox.Show(((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex]).GetEditedFormattedValue(e.RowIndex, DataGridViewDataErrorContexts.Formatting).ToString());
        }

Regards,

  Thorsten

Answer 4

To get the current state of the clicked checkBox, you will have to subscribe to two (2) event:

- CurrentCellDirtyStateChanged

- CellValueChanged

 

This is then the code which will get the current state of clicked checkedBox:

        void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
        {
            if (dataGridView1.IsCurrentCellDirty)
                dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
        }

        private void dataGridView1_CellValueChanged(object obj, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == 0) //compare to checkBox column index
            {
                DataGridViewCheckBoxCell cbx = (DataGridViewCheckBoxCell)dataGridView1[e.ColumnIndex, e.RowIndex];
                if (!DBNull.Value.Equals(cbx.Value) && (bool)cbx.Value == true)
                {                 
                    //checkBox is checked - do the code in here (show a message as you did in your example!
                }
                else
                {
                   //if checkBox is NOT checked (unchecked)
                }
            }
        }

 

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Mitja