创建文本文件并写入该文件
创建文本文件并写入该文件
提问于 2012-05-05 12:48:20
我想创建一个文本文件并向该文件中写入一些文本，但我的代码无法创建该文本文件。
错误消息：
UnauthorizedAccessExcepion was unhandled by user code
Access to the path 'c:\save.txt' is denied.我的代码：
Dim fileLoc As String = "c:\save.txt"
Dim fs As FileStream = Nothing
If (Not File.Exists(fileLoc)) Then
fs = File.Create(fileLoc)
Using fs
End Using
End If
If File.Exists(fileLoc) Then
Using sw As StreamWriter = New StreamWriter(fileLoc)
a = "Test: " + TextBox1.Text
c = "=============================================="
sw.Write(a)
sw.Write(c)
End Using
End IfStack Overflow用户
发布于 2012-05-05 23:00:20
如果您有点着迷，并且想要直接写入C驱动器目录，您可以使用以下命令：
Imports System.Security.Principal
Module VistaSecurity
'Declare API
Private Declare Ansi Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As String) As Integer
Private Const BCM_FIRST As Int32 = &H1600
Private Const BCM_SETSHIELD As Int32 = (BCM_FIRST + &HC)
Public Function IsVistaOrHigher() As Boolean
Return Environment.OSVersion.Version.Major < 6
End Function
' Checks if the process is elevated
Public Function IsAdmin() As Boolean
Dim id As WindowsIdentity = WindowsIdentity.GetCurrent()
Dim p As WindowsPrincipal = New WindowsPrincipal(id)
Return p.IsInRole(WindowsBuiltInRole.Administrator)
End Function
' Add a shield icon to a button
Public Sub AddShieldToButton(ByRef b As Button)
b.FlatStyle = FlatStyle.System
SendMessage(b.Handle, BCM_SETSHIELD, 0, &HFFFFFFFF)
End Sub
' Restart the current process with administrator credentials
Public Sub RestartElevated()
Dim startInfo As ProcessStartInfo = New ProcessStartInfo()
startInfo.UseShellExecute = True
startInfo.WorkingDirectory = Environment.CurrentDirectory
startInfo.FileName = Application.ExecutablePath
startInfo.Verb = "runas"
Try
Dim p As Process = Process.Start(startInfo)
Catch ex As Exception
Return 'If cancelled, do nothing
End Try
Application.Exit()
End Sub
End Module页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10458942
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