vb.net根据条件编辑文件并将其保存

Question

我有一个文件，其中包含测试的日期和结果，逐行写入。我想编辑文件，以便任何没有今天日期的行被删除，然后文件被保存（不需要的行被删除）。帮助将不胜感激。

Dim rawlines() As String Dim outputlines As New List(Of String) rawlines = File.ReadAllLines("C:\users\user10\rslts.csv") For Each line As String In rawlines If line.Contains(today()) = True Then outputlines.Add(line) End If Next

Answer 1

读取线：

Dim rawlines() As String 
    Dim outputlines As New List(Of String) 
    rawlines = File.ReadAllLines("C:\users\user10\rslts.csv") 
    For Each line As String In rawlines 
     If line.Contains(today()) = True Then 
      outputlines.Add(line) 
     End If 
    Next 

写入线到新文件：

Dim MyFile As StreamWriter 
    File.Create("c:\test\TheResults.csv").Close() 
    MyFile = File.AppendText("c:\test\TheResults.csv") 
    For Each Line As String In outputlines 
     MyFile.WriteLine(Line) 
    Next 
    MyFile.Close()