Prevent user change datagrid row if there is any null values in the cells.

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Hello all,

I have a datagrid,and i dont want the user to change go to any other rows if any of the datagrid cells is empty.Can anyone help?

Thnx in advance!

Posted 27-Jun-12 2:09am

IviKAZAZI

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2 solutions

Solution 1

First detect and then disable.

Detect:

if myGrid.CurrentCell.Value == null

Disable:

myGrid.Rows[0].ReadOnly = True

Refer similar post here [^]

Posted 27-Jun-12 2:50am

Rajeev Jayaram

Updated 27-Jun-12 3:05am

v2

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IviKAZAZI 27-Jun-12 8:52am

I dont want to disable it,i just want the user to be able to change the row only when all cells are filled.

Rajeev Jayaram 27-Jun-12 8:57am

Ok, then use DataGridView.CellValidating Event. Refer to the updated solution for a similar post.

IviKAZAZI 27-Jun-12 9:08am

i saw what you posted,but its not what i need. What i want is,when user tries to change the row,a check should occur.if there is any empty cell on the row he currently is,he cannot do that.I just dont know hot to prevent the rowchange. Anyway thnx for the help

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IviKAZAZI · Accepted Answer · 2012-06-27T22:02:00

C#

 private void datagridview1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
        {
            if (datagridview1.Rows[e.RowIndex].Cells[4].FormattedValue.ToString() == string.Empty)
            {
                e.Cancel = true;
                datagridview1.Rows[e.RowIndex].Cells[4].ErrorText = "Mandatory";
            }
            else
            {
                datagridview1.Rows[e.RowIndex].Cells[4].ErrorText = string.Empty;
            }
}

 private void datagridview1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
        {
            if (e.ColumnIndex == 4)
            {
                if (e.FormattedValue.ToString() == string.Empty)
                {
                    datagridview1[e.ColumnIndex, e.RowIndex].ErrorText = "Mandatory";
                    e.Cancel = true;
                }
                else
                {
                    datagridview1[e.ColumnIndex, e.RowIndex].ErrorText = string.Empty;
                }
            }
}