C# DataGridView Color text of single row

Question

I have a DataGridView that has a class as its DataSource.

The class contains an ID string, 2x DateTimes and a Boolean.

I have written some code to change the text of a row that matches an ID I pass to method to Red, but nothing I have tried works.

This is what I have so far:

public void ShowInstanceAsTerminated(String id)
{
    foreach (DataGridViewRow dgvRow in dgvRIM.Rows)
    {
     if (dgvRow.Cells[0].Value.ToString() == id)
     {
      dgvRow.DefaultCellStyle.ForeColor = Color.Red;
     }
    }
}

This is one of many variations of code I have tried, but the cells in question never change!!

Thanks Neil

Answer 1

You need to change the individual cells.

This is VB code lifted from an app where I am able to successfully do this, but it shouldn't be to hard to convert this to c#.

For i As Integer = 0 To ds.Tables("AddressChanges").Rows.Count - 1
                If ds.Tables("AddressChanges").Rows(i)("iSeriesAddress").ToString <> ds.Tables("AddressChanges").Rows(i)("CSIAddress").ToString() Then
                    Me.dgAddressDiscrepancies.Rows(i).Cells("iSeriesAddress").Style.BackColor = Color.Yellow
                    Me.dgAddressDiscrepancies.Rows(i).Cells("CSIAddress").Style.BackColor = Color.Yellow
                End If
Next

Answer 2

Try this format:

dgvRIM.Rows[myRow].Cells[0].Style.ForeColor = Color.Red;

If you want to set the entire row, loop over all cells.

Answer 3

Use the DataGridView's CellFormatting event to make changes to individual cells that compose a row.

Something like this (beware, not tested):

private void dgvRIM_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) {
  if (dgvRIM.Rows[e.RowIndex].Cells[0].Value.ToString() == id) {
    e.CellStyle.ForeColor = Color.Red;
  }
}

Answer 4

I just tested your code (setting the ForeColor with DefaultCellStyle) and it DOES work (with .NET 3.5, but I don't think Winforms has evolved since 2.0).

Now I don't know why it doesn't work for you... maybe you call the code before rows are added, or you reload the rows after your code is called??

Either way, you're probably better off with Jay Riggs's solution, as it will work even if you add new rows afterwards.