使用VB.NET读写文本文件，中间使用单词

Question

我想打开一个txt文件，并写入到它numbers从1 to 100 ，每个号码之间放enter 。

Answer 1

您可以尝试的一种方法是将数字写入StringBuilder，然后使用其ToString（）方法获取结果文本：

Imports System.IO
Imports System.Text


Public Class NumberWriter
   Private ReadOnly OutputPath as String = _
          Path.Combine(Application.StartupPath, "out.txt")


   Public Sub WriteOut()
       Dim outbuffer as New StringBuilder()

       For i as integer = 1 to 100
          outbuffer.AppendLine(System.Convert.ToString(i))
       Next i

       File.WriteAllText(OutputPath, outbuffer.ToString(), true)
   End Sub

   Public Shared Sub Main()
      Dim writer as New NumberWriter()
      Try
        writer.WriteOut()
      Catch ex as Exception
        Console.WriteLine(ex.Message)
      End Try
   End Sub
End Class

Answer 2

在家学习中有一个很好的例子

 Dim FILE_NAME As String = "C:\test2.txt"

If System.IO.File.Exists(FILE_NAME) = True Then
    Dim objWriter As New System.IO.StreamWriter(FILE_NAME)
    objWriter.Write(TextBox1.Text)
    objWriter.Close()
    MsgBox("Text written to file")
Else
    MsgBox("File Does Not Exist")
End If

Answer 3

您还可以使用“ My.Computer.FileSystem”命名空间，例如：

Dim str As String = ""
For num As Int16 = 1 To 100
  str += num.ToString & vbCrLf
Next
My.Computer.FileSystem.WriteAllText("C:\Working\Output.txt", str, False)

Answer 4

请参见System.IO命名空间 ，尤其是System.IO.File类 。