打开INI文件并将内容放置在不同的文本框中

Question

我正在VB.net中创建一个程序，该程序打开.INI文件并读取内容。 我写了以下代码：

   Private Sub OpenINIButton_Click(sender As Object, e As EventArgs) Handles OpenINIButton.Click
    Dim OpenDLG As New OpenFileDialog
    Dim FileLocation = OpenDLG.FileName.ToString()

    OpenDLG.Filter = "INI File (*.ini)|*.ini"
    OpenDLG.Title = "Open INI File"
    OpenDLG.InitialDirectory = "C:\"
    OpenDLG.RestoreDirectory = True

    DialogResult = OpenDLG.ShowDialog

    If DialogResult = Windows.Forms.DialogResult.OK Then

        TextBox1.Text = ReadIni(FileLocation, INIkey, INIvalue, "")

    ElseIf DialogResult = Windows.Forms.DialogResult.Cancel Then

    End If

End Sub

打开文件对话框打开，我可以打开一个INI文件，但INIkey的值未放置在TextBox1中。

知道我该如何解决吗？

Answer 1

您初始化path beore用户已选择它：

Dim FileLocation = OpenDLG.FileName.ToString()

在ShowDialog之后执行此操作，因此这里是正确的位置：

If DialogResult = Windows.Forms.DialogResult.OK Then
    Dim FileLocation = OpenDLG.FileName.ToString() 
    TextBox1.Text = ReadIni(FileLocation, INIkey, INIvalue, "")
ElseIf DialogResult = Windows.Forms.DialogResult.Cancel Then

End If

但是，为什么不注意到异常呢？ 我假设您有一个空的catch块，您尝试在其中打开ReadIni的文件。 反正这是个坏习惯。

请注意，代码中的FileLocation变量在分配时引用了String OpenDLG.FileName ，两者之间没有永久连接。 因此，如果以后更改，变量仍将引用旧字符串。

Answer 2

最好的方法是制作一个如下所示的iniParse模块，并仅使用如下所示的函数：

Module iniParse
Public readwrtie As Integer
Public settingValueReturn As New System.Text.StringBuilder(255)

Private Declare Auto Function WritePrivateProfileString Lib "Kernel32" _
(ByVal IpApplication As String, ByVal Ipkeyname As String, _
ByVal IpString As String, ByVal IpFileName As String) As Integer

Private Declare Auto Function GetPrivateProfileString Lib "Kernel32" _
(ByVal IpApplicationName As String, ByVal IpKeyName As String, _
ByVal IpDefault As String, ByVal IPReturnedString As System.Text.StringBuilder, _
ByVal nsize As Integer, ByVal IpFileName As String) As Integer

Public Sub WriteINIFile(heading As String, setting As String, settingvalue As String, path As String)
    WritePrivateProfileString(heading, setting, settingvalue, path)
End Sub

Public Sub ReadIniFile(heading As String, setting As String, path As String)
    GetPrivateProfileString(heading, setting, "", settingValueReturn, 100, path)
End Sub

End Module

例：

Button1_click blah blah blah handles button1.click...
     ReadIniFile("MAIN", "test", "C:\config.ini")
'this would read the following ini file: 
'[MAIN]
'test=hi
'to get that 'hi' value you would use this code:
textbox1.text = settingReturnValue.tostring '(settingValueReturn Will always be the value of the setting entered in the function args)

'to write ini file:
Button1_click blah blah blah handles button1.click...
WriteIniFile("MAIN", "test2", "hi2", "C:\config.ini") 
'this would write the following to the ini @ C:\config.ini file:
'[MAIN]
'test2=hi2

希望这可以满足您的需求！