ReadString读INI文件的问题

[fkueffff20070302]

我有一个INI文件，内容如下：
[Form]
Data Source=192.168.1.100
ID=sa
Password=070302
DataBase=AoKai

我怎么用ReadString读出上面几个值呢？如
Edit1->Text=ini->ReadString("Form","Data Source",变量）；
192.168.1.100怎么用变量代呀？？

[hyz_cs]

你上面"变量"位置应该是默认返回值的参数吧,也就是没有"Data Source"这一项时情函数的返回值.

[Persistent8813]

那地方是默认值,可以用""或一个固定值

[xjq2003]

Edit1->Text=ini->ReadString("Form","Data Source",变量）；
你说的“变量”不是将数据给“变量”，而是将“变量”内容做为默认值。

这里“变量”可以使用String类型的

[xjq2003]

void __fastcall TForm1::FormCreate(TObject *Sender)

{
  TIniFile *pIniFile = new TIniFile("c:\\MyApp\\bin\\MyApp.ini");
  if (pIniFile->ReadBool("AutoLoad", "FormProperties", false) == true)
  {
    Visible = pIniFile->ReadBool("FormOptions", "Visible", true);
    Color = (Graphics::TColor)pIniFile->ReadInteger("FormOptions", "Color", clWindow);
    Caption = pIniFile->ReadString("FormOptions", "Caption", "Main");
  }
  delete pIniFile;
}

virtual AnsiString __fastcall ReadString(const AnsiString Section, const AnsiString Ident, const AnsiString Default);

Description

Call ReadString to read a string value from an INI file. Section identifies the section in the file that contains the desired key. Ident is the name of the key from which to retrieve the value. Default is the string value to return if the:

Section does not exist.

Key does not exist.
Data value for the key is not assigned.

The ReadString method inherited from TCustomIniFile is modified to operate on the in-memory copy of the INI file data. The read methods for all other data types use ReadString internally and then translate to the appropriate data type.

[ccrun.com]

String strDefault = "192.168.1.100";
Edit1->Text = ini->ReadString("Form", "Data Source", strDefault);

[bigfog]

没默认就用空值,如下
Edit1->Text = ini->ReadString("Form", "Data Source", "");

[魔方幻影]

TIniFile *IniKey;
AnsiString ExePath = ExtractFilePath(ParamStr(0));
IniKey = new TIniFile (ExePath + "/config.ini");
Edit1->Text = IniKey->ReadString("Form","Data Source",ExePath).Trim();
delete IniKey;