Visual Basic单选按钮计算

Question

我首先在VB中使用单选按钮，但我无法弄清楚我做错了什么。 click事件假设是将两个输入相乘，但无论输入什么数字，结果都会返回0。

我正在使用的代码是：

回

Dim decTotal As Decimal       'Total charge for choice plan

Dim intMinutes As Integer         'Duration of phone calls
 　
 'Declare constants for Rates

 Const decDaytimeRate As Decimal = 0.07D

Const decEveningRate As Decimal = 0.12D

Const decOffPeakRate As Decimal = 0.05D
　
 'Dispay Total charge

lblTotal.Text = decTotal.ToString("c")
　
　
　

'Calculate total amount the user is expected to pay according to rate plan

 If radDaytime.Checked = True Then

decTotal = intMinutes * decDaytimeRate

End If

 If radEvening.Checked = True Then

 decTotal = decEveningRate * intMinutes

End If 

我确信这是一个简单的修复，因为我没有丢失任何错误消息，但我仍然被卡住了。

Answer 1

将lblTotal.Text = decTotal.ToString（“c”）行移至末尾。它在你计算之前显示结果。