你好这段代码是Chris,结合MackieChan解决方案
查看我丢失的代码,我无法弄清楚如何添加范围。
我的意思是:
我正在尝试更改或更新代码,以检测页面的逗号,
以下代码显示了如何使用逗号输入页面
示例:1,2,5,3,8并且它不接受0或大于最大页面
我要问的是添加可以接受的代码:
2-5,8,9 要么 8,9,2-5 所以这意味着,要打印的页面是2,3,4,5,8,9
或 2,4-6,9,8 所以这意味着,要打印的页面是2,4,5,6,8,9
private rgxNumberWithComma As New System.Text.RegularExpressions.Regex("^([0-9]+,?)+$")
Public Function CheckInput(ByVal valyo As String, _
ByVal origMaxPage As Integer) As Boolean
Dim match = rgxNumberWithComma.Match(valyo)
If Not match.Success Then
Return False
Else
Dim numbers as new List(Of Integer) ‘will store added numbers
For Each Item In valyo.Split(","c)
Dim intValue As Integer
‘Check if number is a valid integer
‘Check if number is 0
‘Check if number has already added the number list
‘Check if number is greater that MaxPage
If Not Integer.TryParse(Item, intValue) _
OrElse intValue > origMaxPage _
OrElse intValue = 0 _
OrElse numbers.Contains(IntValue) Then
Return False
Else
‘Item is valid, continue
Numbers.Add(intValue)
End If
Next
End If
Return True
End Function
答案 0 :(得分:1)
您可以使用它来验证字符串:
^[0-9]+(-[0-9]+)?(,[0-9]+(-[0-9]+)?)+$
这也将确保字符串不以逗号开头或结尾。
为了评估字符串,我建议:
Dim numbers as new List(Of Integer) ‘will store added numbers
For Each Item In valyo.Split(","c)
Dim parts = Item.Split("-"c)
If parts.Length > 1 Then
‘Evaluate range
Dim minValue As Integer
Dim maxValue As Integer
If Not Integer.TryParse(Item, minValue) _
OrElse Not Integer.TryParse(Item, maxValue) _
OrElse minValue > maxValue _
OrElse maxValue > origMaxPage _
OrElse minValue = 0 Then
Return False
Else
For value As Integer = minValue To maxValue
If numbers.Contains(value) Then
Return False
End If
‘Item is valid, continue
numbers.Add(value)
Next
End If
Else
Dim intValue As Integer
If Not Integer.TryParse(Item, intValue) _
OrElse intValue > origMaxPage _
OrElse intValue = 0 _
OrElse numbers.Contains(IntValue) Then
Return False
Else
‘Item is valid, continue
numbers.Add(intValue)
End If
End If
Next