VB.NET如何读INI文件

[william78]

用了.NET就不想用以前的API函数了，但是要读INI文件，不知道有没有方法可以替代以前的GetPrivateProfileString呢？

[机器人]

呵呵，VB.NET 里读写ini 依旧是调用win32 API.如果不想用，建议使用xml配置文件。

项目里添加App.Config的xml文件。

App.Config 文件结构：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="Name" value="Peter" />
</appSettings>
</configuration>


读取也方便：System.Configuration.ConfigurationSettings.AppSettings("Name")

[机器人]

调用API读取ini文件：
<DllImport("kernel32")> _
Private Function GetPrivateProfileString(ByVal section As String, _
ByVal key As String, _
ByVal def As String, _
ByVal retVal As StringBuilder, _
ByVal size As Integer, _
ByVal filePath As String) As Integer
End Function

[william78]

不是说微软的下一代操作系统就放弃API了么？那个时候怎么办啊，都用XML文件而不再使用现在的这种INI文件了么？疑惑中

[chenyuming2004]

不是说微软的下一代操作系统就放弃API了么?

晕，它只是封级的程度更高一些，
WIN 32应用程序最终不还得建筑在WIN 32API基础上来完成。

MFC，.Net Framework都只是对WIN 32的封装。

[chenhui530]

这个很好～～你自己消化下吧
'获得指定ini文件中某个节下面的所有键值 TrueZq,,需要下面的API声明
Private Declare Function GetPrivateProfileSection Lib "kernel32" Alias "GetPrivateProfileSectionA" (ByVal lpAppName As String, ByVal lpReturnedString As String, ByVal nSize As Int32, ByVal lpFileName As String) As Int32
'返回一个字符串数组
'调用举例：
'获得指定ini文件中某个节下面某个子键的键值,需要下面的API声明
Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (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
Public arrClass() As String
'返回一个字符串
'调用举例：
'Dim strRun As String
'strRun = GetiniValue("Windows", "Run", "C:\Windows\Win.ini")

Public Function GetiniValue(ByVal lpKeyName As String, ByVal strName As String, ByVal strIniFile As String) As String
Dim strTmp As String
strTmp = New String(" ", 100)

Call GetPrivateProfileString(lpKeyName, strName, "", _
strTmp, Len(strTmp), strIniFile)
GetiniValue = Left$(strTmp, InStr(strTmp, vbNullChar) - 1)

End Function






'Dim k As Integer = 0
Public Function GetInfoSection(ByVal strSection As String, ByVal strIniFile As String) As String()
Dim strReturn As String = New String(" ", 32767)
Dim strTmp As String
Dim nStart As Integer, nEnd As Integer, i As Integer
Dim sArray() As String
sArray = New String() {"", ""}


Call GetPrivateProfileSection(strSection, strReturn, Len(strReturn), "e:\vb\a.ini")

strTmp = strReturn





Dim k As Integer = 0


Do While strTmp <> ""
nStart = nEnd + 1

nEnd = InStr(nStart, strReturn, vbNullChar)


strTmp = Mid$(strReturn, nStart, nEnd - nStart)

If Len(strTmp) > 0 Then


sArray(k) = strTmp

ReDim Preserve sArray(UBound(sArray) + 1)


k = k + 1

End If

Loop
ReDim Preserve sArray(UBound(sArray) - 1)

GetInfoSection = sArray

End Function

'————————（2）————————————
'作用：去掉字符串中的首尾空格、所有无效字符
'测试用例
'Dim strRes As String
'Dim strSour As String
'
'strSour = " " & vbNullChar & vbNullChar & " ab cd" & vbNullChar
'strRes = zqTrim(strSour)
'MsgBox " 长度=" & Len(strSour) & "值=111" & strRes & "222"
Public Function zqTrim(ByVal strSour As String) As String
Dim strTmp As String
Dim nLen As Integer
Dim i As Integer, j As Integer
Dim strNow As String, strValid() As String, strNew As String
'strNow 当前字符
'strValid 有效字符
'strNew 最后生成的新字符

strTmp = Trim$(strSour)
nLen = Len(strTmp)
If nLen < 1 Then
zqTrim = ""
Exit Function
End If
j = 0
For i = 1 To nLen
strNow = Mid(strTmp, i, 1) '每次读取一个字符
'MsgBox Asc(strNow)
If strNow <> vbNullChar And Asc(strNow) <> 9 Then '如果有效，则存入有效数组
ReDim Preserve strValid(j)
strValid(j) = strNow
j = j + 1
End If

Next i

strNew = Join(strValid, "") '将所有有效字符连接起来
zqTrim = Trim$(strNew) '去掉字符串中的首尾空格
End Function

[william78]

谢谢哦。原来只是封装的更高级了，我以为微软另起炉灶吧