[英]Reading from an INI file
我發現寫入INI文件非常容易,但是從已經創建的INI文件中檢索數據時遇到了一些麻煩。
我正在使用此功能:
Public Declare Unicode Function GetPrivateProfileString Lib "kernel32" _
Alias "GetPrivateProfileStringW" (ByVal lpApplicationName As String, _
ByVal lpKeyName As String, ByVal lpDefault As String, _
ByVal lpReturnedString As String, ByVal nSize As Int32, _
ByVal lpFileName As String) As Int32
如果我有一個名為'c:\\ temp \\ test.ini'的INI文件,其中包含以下數據:
[testApp]
KeyName=keyValue
KeyName2=keyValue2
如何檢索KeyName和KeyName2的值?
我嘗試了這段代碼,但沒有成功:
Dim strData As String
GetPrivateProfileString("testApp", "KeyName", "Nothing", strData, Len(strData), "c:\temp\test.ini")
MsgBox(strData)
轉到Pinvoke.Net網站並修改其示例后,它們的Function聲明就不同了。
修改示例
Imports System.Runtime.InteropServices
Imports System.Text
Module Module1
Private Declare Auto Function GetPrivateProfileString Lib "kernel32" (ByVal lpAppName As String, _
ByVal lpKeyName As String, _
ByVal lpDefault As String, _
ByVal lpReturnedString As StringBuilder, _
ByVal nSize As Integer, _
ByVal lpFileName As String) As Integer
Sub Main()
Dim res As Integer
Dim sb As StringBuilder
sb = New StringBuilder(500)
res = GetPrivateProfileString("testApp", "KeyName", "", sb, sb.Capacity, "c:\temp\test.ini")
Console.WriteLine("GetPrivateProfileStrng returned : " & res.ToString())
Console.WriteLine("KeyName is : " & sb.ToString())
Console.ReadLine();
End Sub
End Module
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