String.Join(",",YourArray)

另外,如果要从复选列表(或radiobuttonlist)中获取所有选定的项目,您可以使用扩展方法(如下所示的复选框)：

调用语法：Dim sResults As String = MyCheckBoxList.ToStringList()

<Extension()> _
    Public Function ToStringList(ByVal cbl As System.Web.UI.WebControls.CheckBoxList) As String
        Dim separator As String = ","
        Dim values As New ArrayList
        For Each objItem As UI.WebControls.ListItem In cbl.Items
            If objItem.Selected Then
                values.Add(objItem.Value.ToString)
            End If
        Next
        Return String.Join(separator,values.ToArray(GetType(String)))
    End Function