我在datagridview CellFormatting事件中收到此异常。 我在这个事件中所做的就是根据datagridview单元格值改变单元格样式。如何在此类操作中出现此错误？谁能帮我？ 事件方法如下：
private void datagridPM_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
try
{
if (datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 1].Value.ToString() == "RUNNING")
{
datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 1].Style = new DataGridViewCellStyle { ForeColor = Color.Green, BackColor = Color.White };
if (e.RowIndex == current_selected.RowIndex)
this.Invoke(new Action(() => strt_btn.Text = "STOP"));
}
else if (datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 1].Value.ToString() == "STOPPED")
{
datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 1].Style = new DataGridViewCellStyle { ForeColor = Color.Red, BackColor = Color.White };
if (e.RowIndex == current_selected.RowIndex)
this.Invoke(new Action(() => strt_btn.Text = "START"));
}
datagridPM.Columns[2].DefaultCellStyle.Font = new Font(DataGridView.DefaultFont, FontStyle.Bold);
datagridPM.Columns[datagridPM.ColumnCount - 1].DefaultCellStyle.Font = new Font(DataGridView.DefaultFont, FontStyle.Bold);
if (Convert.ToDouble(datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 6].Value)>80.00)
{
datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 6].Style = new DataGridViewCellStyle { ForeColor = Color.Red, BackColor = Color.Wheat };
}
else
{
datagridPM.Rows[e.RowIndex].Cells[datagridPM.ColumnCount - 6].Style = new DataGridViewCellStyle { ForeColor = Color.Black, BackColor = Color.White };
}
}
catch (Exception ex)
{
MDIParent.thisMdiObj.Invoke(new Action(() => MDIParent.thisMdiObj.txtLog.AppendText(DateTime.Now.ToString() + " : " + "CELL FORMATTING EXCEPTION : " + ex.Message.ToString() + "::" + ex.StackTrace + Environment.NewLine)));
}
}