vb.net條件格式Gridview單元格

Question

這是我的代碼，有條件地格式化特定的Gridview單元格（該值是我轉換為十進制的字符串）

 If e.Row.Cells(0).Text = "Total" Then
        Dim c2 As Decimal
        Decimal.TryParse(e.Row.Cells(7).Text, c2)
        If c2 >= 0 And c2 <= 84 Then
            e.Row.Cells(7).BackColor = Drawing.Color.Firebrick
            e.Row.Cells(7).ForeColor = Drawing.Color.White
        End If
        If c2 >= 85 Then
            e.Row.Cells(7).BackColor = Drawing.Color.LimeGreen
            e.Row.Cells(7).ForeColor = Drawing.Color.Black
        End If
    End If

問題是小數沒有空值

因此，我希望單元格背景色為空時為白色（無編號），當前顯示為Firebrick，因為它將0歸類為無/空

關於如何實現這一目標的任何想法？

Answer 1

如果解析成功，Decimal.TryParse（）應該具有返回值

嘗試：

'Code is not tested
Dim c2 As Decimal

If Not Decimal.TryParse(e.Row.Cells(7).Text, c2) Then
    'No double value found
    'Color as you wish
Else If c2 >= 0 And c2 <= 84 Then
    e.Row.Cells(7).BackColor = Drawing.Color.Firebrick
    e.Row.Cells(7).ForeColor = Drawing.Color.White
Else If c2 >= 85 Then
    e.Row.Cells(7).BackColor = Drawing.Color.LimeGreen
    e.Row.Cells(7).ForeColor = Drawing.Color.Black
End If