QDataStream reading into QString

[miaoliang]

The QDataStream allows you to serialize some of the Qt data types. For QString, char pointer is right. These are my example:
First is used to write a QString into a file:

QFile file("file.dat");
                    file.open(QIODevice::WriteOnly);
                    QDataStream out(&file);
    	    out << "Hello World!";

QFile file("file.dat");
                    file.open(QIODevice::WriteOnly);
                    QDataStream out(&file);
    	    out << "Hello World!";

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Second is used to read content from a file:

char *ch;
	    QFile file("file.dat");
                    file.open(QIODevice::ReadOnly);
                    QDataStream in(&file);
    	    in >> ch;
                    QString str(ch);

char *ch;
	    QFile file("file.dat");
                    file.open(QIODevice::ReadOnly);
                    QDataStream in(&file);
    	    in >> ch;
                    QString str(ch);

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The "str" is your result!