Question

我想知道如何在c ++ builder中的xml或ini文件中保存应用程序的设置。知道visual studio在“设置”中有这些功能，我在c ++ builder中搜索相同的功能。

用什么方法来解决这个问题。

Answer 1

使用C ++ Builder创建VCL应用程序时，可以使用ini文件保存下次启动应用程序时要恢复的设置和值。

首先，包括IniFiles.hpp标题。

#include <IniFiles.hpp>

要保存设置和值，请创建一个新的TIniFile并在OnClose事件中写入它。

void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{
    bool booleanValueToSave = true;
    int integerValueToSave = 42;

    TIniFile *ini = new TIniFile(ChangeFileExt(Application->ExeName, ".ini"));

    ini->WriteString("SectionName", "KeyName", "Value to save as KeyName");
    ini->WriteBool("SectionName", "AnotherKeyName", booleanValueToSave);
    ini->WriteInteger("SectionName", "YetAnotherKeyName", integerValueToSave);

    // To save something like the window size and position
    ini->WriteInteger("Settings", "WindowState", Form1->WindowState);
    if (Form1->WindowState == wsNormal)
    {
        ini->WriteInteger("Settings", "MainFrm Top", Form1->Top);
        ini->WriteInteger("Settings", "MainFrm Left", Form1->Left);
        ini->WriteInteger("Settings", "MainFrm Height", Form1->Height);
        ini->WriteInteger("Settings", "MainFrm Width", Form1->Width);
    }

    delete ini;
}

不要忘记删除!!

该代码将创建一个与您的可执行文件同名但扩展名为.ini的ini文件。将有两个标题，“SectionName”和“Settings”。在标题下，您将看到键值对，例如“AnotherKeyName = true”和“YetAnotherKeyName = 42。”

然后，要在启动应用程序时恢复值，请创建一个新的TIniFile并在OnCreate事件中从中读取。

void __fastcall TForm1::FormCreate(TObject *Sender)
{
    TWindowState ws;
    int integerValueToRestore;
    bool booleanValueToRestore;
    int someDefaultIntegerValueIfTheKeyDoesntExist = 7;
    bool someDefaultBooleanValueIfTheKeyDoesntExist = false;

    TIniFile *ini = new TIniFile(ChangeFileExt(Application->ExeName, ".ini"));

    integerValueToRestore = ini->ReadInteger("SectionName", "YetAnotherKeyName", someDefaultIntegerValueIfTheKeyDoesntExist);
    booleanValueToRestore = ini->ReadBool("SectionName", "AnotherKeyName", someDefaultBooleanValueIfTheKeyDoesntExist);

    // To restore the window size and position you saved on FormClose
    ws = (TWindowState)ini->ReadInteger("Settings", "WindowState", wsNormal);
    if (ws == wsMinimized)
        ws = wsNormal;
    if (ws == wsNormal)
    {
        Form1->Top = ini->ReadInteger("Settings", "MainFrm Top", 10);
        Form1->Left = ini->ReadInteger("Settings", "MainFrm Left", 10);
        Form1->Height = ini->ReadInteger("Settings", "MainFrm Height", 730);
        Form1->Width = ini->ReadInteger("Settings", "MainFrm Width", 1028);
    }

    Form1->WindowState = ws;

    delete ini;
}

希望有所帮助。

C ++ builder应用程序设置？

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