Question

我需要比较两个字符串并获得重复和原始值在调用chkDuplicateValue函数时，我需要在返回值中获取重复和原始值吗？，充当字符串的分隔符。 Dim oldStr As String =“test1，test2，test” Dim newStr As String =“test，test53” 示例输出：原始值：test1，test2，test，test53 duplicate值：test

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim oldStr As String = "test1,test2,test"
Dim newStr As String = "test,test53"
Dim refinedString As String = chkDuplicateValue(newStr, oldStr)

'在调用此函数时，我需要在返回值中同时获取重复和原始文件吗？

Response.Write("Original Value" & refinedString(0))
Response.Write("duplicate Value" & refinedString(1))
'Example out put : Original Value :test1,test2,test,test53  duplicate Value : test
End Sub

Function chkDuplicateValue(ByVal newStr As String, ByVal oldStr As String) As String
    Dim duplicate As String = ""
End Function

Answer 1

return oldStr.Split(',').Union(newStr.Spit(','));

如果使用Join linq扩展方法

不起作用

Answer 2

使用Linq Intersect 返回重复项，使用 Union 返回Distinctlist。传递 newStr ByRef ，因此， newStr 将返回未重复的字符串。另外，请记住参考 System.Linq

Function chkDuplicateValue(ByRef newStr As String, ByVal oldStr As String) As String
     Dim duplicate As String = ""
     duplicate = String.Join(",",(newStr.Split(',').Intersect(oldStr.Split(','))).ToArray())
     newStr = String.Join(",",(newStr.Split(',').Union(oldStr.Split(','))).ToArray())
     return uplicate
End Function

比较功能问题asp.net

2 个答案: