ASP.net VB-修剪/替换问题

试着把它分成几个部分,这样你就能正确地计算字符串。在一行上执行所有这些操作的可读性较差,而且更容易出错。另外,不要使用带UCase、CStr、Len等的旧VB6表示法。它们在Microsoft.VisualBasic命名空间中仍然有效(MS向我们保证它不会出现在任何地方),但是只要熟悉.Net对象结构,您就会发现示例代码更容易翻译。

' Get the row string out using ToString to force the typing
Dim rowPostCode As String = drSet5c.Tables(0).Rows(0).Item("post_code").ToString()

' Perform the case manipulation and replace function, then assign to new string
Dim tbPostCodeFormatted As String = tbPostcode.Text.Trim().ToUpper().Replace(" ", "")

' Perform the string comparison. Because we're ignoring case here, the ToUpper()
' used above may not be necessary
If rowPostCode.Equals(tbPostCodeFormatted, StringComparison.OrdinalIgnoreCase) Then 
    response.write("Postcodes match") 
Else 
    response.write("Postcodes DON'T match") 
End If

那是因为 Ucase Replace 是实例方法。试试这个:

tbPostcode.Text.Replace(" ","").ToUpper

创建临时控制台应用程序并运行以下代码:

Module Module1
    Sub Main()
        Dim dbaseValue = "AB12CD"
        Dim userInput = "AB1 2CD"
        If UCase(dbaseValue) <> UCase(Replace(userInput, " ", "")) Then
            Console.WriteLine("You need a new machine")
        Else
            Console.WriteLine("The bug is elsewhere")
        End If
        Console.ReadLine()
    End Sub
End Module

上面说什么?

Replace() 但是 String.Replace()