Question

我是.net编程的新手。我有一个产品供应商数据库，有一些供应商的详细信息。在phonetextbox上我希望电话号码至少为8位数。我编码了这个，但是没有用。你能帮我吗？

   'Dim numbers As Decimal = Convert.ToDecimal(PhoneTextBox.Text)
    Dim regex As Regex = New Regex("^\d{8}")
    Dim match As Match = regex.Match(numbers)
    If Not match.Success() Then
        MessageBox.Show("Attention!!!The phone number must be at least 8 digits")
        e.Cancel = True
    End If

End Sub`

Answer 1

这几乎可以完成你想要做的事情。正如评论中所说，不需要正则表达式进行长度检查，它绝对应该是字符串而不是数字类型。

    Dim submission = "1234567"
    If (submission.Length <= 8 ) Then
        Console.WriteLine("Attention!!!The phone number must be at least 8 digits")
    'e.Cancel = True
    End If

Answer 2

    Sub Main()
        Dim phonePattern As New Regex("^\d{3}-\d{7}$")
        Dim phoneNumber As String = "210-1234567"

        If (Not phonePattern.IsMatch(phoneNumber)) Then
            Console.WriteLine("Number {0} is not in right format [999-9999999]", phoneNumber)
        Else
            Console.WriteLine("Number {0} is in right format [999-9999999]", phoneNumber)
        End If


        Console.ReadLine()
    End Sub

.net上可接受的电话号码

2 个答案: