编程开发 > DotNET > VB.Net > 文章内容

VB.NET校验字符串函数

2017-7-26编辑:daibenhua

VB.NET校验字符串是否是日期

1
2
3
4
5
6
7
8
9
'Validate for a date
Shared Function checkdate(ByVal thisvalue As String) As String
  If Not IsDate(thisvalue) Then
    checkdate = "NULL"
  Else
    checkdate = "'" & thisvalue & "'"
  End If
  Return checkdate
End Function ' END checkdate

VB.NET检查字符串是否是数字

1
2
3
4
5
6
7
8
9
10
11
12
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
'Used to submit values to the database, check for empty value, replace w/ "NULL"
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   
Shared Function checkNumber(ByVal thisvalue As String) As String
  If IsDBNull(thisvalue) Or Len(thisvalue) = 0 Or Not IsNumeric(thisvalue) Then
    checkNumber = "NULL"
  Else
    checkNumber = thisvalue
  End If
  Return checkNumber
End Function ' END checkNumber

以上所述就是本文的全部内容了,希望大家能够喜欢。

VB.NET实现验证信用卡卡号

热点推荐

登录注册
触屏版电脑版网站地图