C＃DataGridView单元格更新不更新最后一行

Question

I have a button which updates all values in column 3 (C) (except the header) with whatever has been selected in a combo box.

    private void updateExcel_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < dataGridView1.RowCount - 1; i++)
        {
            if (!RowIsEmpty(i))
            {
                dataGridView1[2, i].Value = Combo.Text;
            }
        }
    }

This works apart from it doesn't update the last row.

RowIsEmpty:

    private bool RowIsEmpty(int rowIndex)
    {
        for (int i = 0; i < dataGridView1.ColumnCount; i++)
        {
            if (dataGridView1.Rows[rowIndex].Cells[i].Value != null &&
                dataGridView1.Rows[rowIndex].Cells[i].Value.ToString() != "")
            {
                return false;
            }
        }
        return true;
    }

Answer 1

I think your problem is in the updateExcel_Click ..

The problem, in my point of view, is in this for:

for (int i = 0; i < dataGridView1.RowCount - 1; i++)

Because you are jumping rows here so, imagine dataGridView1.RowCount have a value of 3, and you are making dataGridView1.RowCount - 1 so dataGridView1.RowCount = 2 .

With this your for will running 0, 1 and 2. When the objective, in my point of view, you wanna him to run 0, 1, 2 and 3.

The problem you saying on your question is: Not updating last row, because for is jumping the last row..

Solution:

private void updateExcel_Click(object sender, EventArgs e)
{
   for (int i = 0; i < dataGridView1.RowCount; i++)
   {
      if (!RowIsEmpty(i))
      {
          dataGridView1[2, i].Value = Combo.Text;
      }
   }
}

Or if you want to keep the logic you have, you need on your for, add this < , something like this:

for (int i = 0; i <= dataGridView1.RowCount - 1; i++)