用ForEach迭代列表

我不知道为什么要使用foreach而不是String.Join语句。您可以简单地使用分号作为连接字符来String.Join()列表。

String.Join(";", emailList.ToArray())

你可以试试

Dim stringValue As String = String.Join(";", emailList.ToArray)

String.Join Method

我不会用ForEach循环来实现这个。下面是我要做的:

String.Join(";", emailList.ToArray());

       Dim emailList As New List(Of String)
    emailList.Add("one@domain.com")
    emailList.Add("two@domain.com")
    emailList.Add("three@domain.com")

    Dim output As StringBuilder = New StringBuilder
    For Each Email As String In emailList
        output.Append(IIf(String.IsNullOrEmpty(output.ToString), "", ";") & Email)
    Next

Dim emailList As New StringBuilder()

For Each (email As String In emails)
     emailList.Append(String.Format("{0};", email))
Next

Return emailList.ToString()

如果有语法错误请原谅。。。我的VB.NET有点生锈了,我手边没有编译器。