vb.net - 未为 '<='和 'Integer'类型定义运算符 'System.Windows.Forms.TextBox'

Question

这是我正在尝试的代码:

If txtMonths >= 1 And txtMonths <= 6 Then
    additionalDiscount = 0

Answer 1

intMonths是TextBox，而不是int，因此您不能仅将其用作int。您必须提取其文本值并将其首先转换为int:

Dim intMonthsVal As Integer = Integer.Parse(txtMonths.Text)
If intMonthsVal >= 1 AndAlso intMonthsVal <= 6 Then
    additionalDiscount = 0
End If