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      VB.net 2010 視頻教程 VB.net 2010 視頻教程 VB.net 2010 視頻教程
      SQL Server 2008 視頻教程 c#入門經典教程 Visual Basic從門到精通視頻教程
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      首頁 > 編程開發 > .net教程 >
      • vb.net教程之有關文件、文件夾操作的控件

      • 2015-01-18 15:16 來源:未知
      有關文件、文件夾操作的控件 (相關vb.net教程)
      文件操作是通過文件系統對象file directory來完成的,它可以完成文件(夾)的如下操作:創建、刪除、復制、更名等。
      復習通用對話框控件OpenFileDialog1及方法、屬性:ShowDialog、FileName
      (一)、File對象
      命名空間:System.IO.File
      作用:完成文件的創建、復制、移動、刪除、打開等操作
      常用方法:
      Copy—復制文件
      Create—創建新文件
      Delete—刪除文件
      Move—移動文件
      Open—打開文件,如果文件不存在,有創建功能。
      Openread—打開文件并讀出。
      Openwrite—打開文件并寫入。
      應用實例:以文件的創建、復制、移動、刪除為例來說一下文件操作的應用。[實驗報告43]
      程序見,file對象與文件操作
      程序清單為:
      Public Class Form1
          Dim f As System.IO.File
          Dim sourcename, desname As String
          Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
              OpenFileDialog1.ShowDialog()
              sourcename = OpenFileDialog1.FileName
              TextBox1.Text = sourcename
              desname = InputBox("請輸入目標文件名", "目標文件")
              f.Copy(sourcename, desname, True)
              TextBox2.Text = desname
          End Sub
       
          Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
              OpenFileDialog1.ShowDialog()
              sourcename = OpenFileDialog1.FileName
              TextBox1.Text = sourcename
              f.Delete(sourcename)
          End Sub
       
          Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
              OpenFileDialog1.ShowDialog()
              sourcename = OpenFileDialog1.FileName
              TextBox1.Text = sourcename
              desname = InputBox("請輸入要移動的目標文件名", "移動文件")
              f.Move(sourcename, desname)
              TextBox2.Text = desname
          End Sub
       
          Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
              desname = InputBox("請輸入要新建的目標文件名", "新建文件")
              TextBox1.Text = desname
              f.Create(desname)
          End Sub
       
          Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
              desname = InputBox("請輸入要打開的目標文件名", "打開文件")
              TextBox1.Text = desname
              f.Open(desname, IO.FileMode.Create, IO.FileAccess.Write)
      End Sub
       
          Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
              End
          End Sub
       
      End Class
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