xstrm.read();

[mickey]

yes it was the error; but if I use .read() my app doesn't respond....
I coded this also:

QFile f(file);
f.open(IO_ReadOnly | IO_WriteOnly);
QTextStream xstrm(&f);
Class.Write(QTextStream(&f));   
QString plainText =  xstrm.readLine(); // or .read()
QDomText t1 = doc.createTextNode(plainText);
//QDomText t1 = doc.createTextNode("hello"); //with this ok
tag1.appendChild(t1);

QFile f(file);
f.open(IO_ReadOnly | IO_WriteOnly);
QTextStream xstrm(&f);
Class.Write(QTextStream(&f));   
QString plainText =  xstrm.readLine(); // or .read()
QDomText t1 = doc.createTextNode(plainText);
//QDomText t1 = doc.createTextNode("hello"); //with this ok
tag1.appendChild(t1);

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void Class::Write(QTextStream &xstrm) {
	xstrm << "hello\n";
}

void Class::Write(QTextStream &xstrm) {
	xstrm << "hello\n";
}

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after this in my file I found:

hello
a line of ascii code

hello
a line of ascii code

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why? "hello" is right...with "QDomText t1 = doc.createTextNode(plainText)" I'm trying to insert again "hello" in the file.....thanks