CFile writes garbage value

Anu_Bala

Im writing some data in to file. For that, im taking values and assign it to the struct varaible and then i add that sruct to CPtrList. Then im writing this CPtrList in file. But it writes some garbage value. I dont know where im doing wrong. Assigning values to struct:

		sLbl= new SGraphLbl;
		sTagName = (CString)czTagGetVal;
		int pos = sTagName.Find("\\n");
		sName = sTagName.Left(pos-1);
		if(sName.Right(1) == "Y")
		{
			sTagName = sName.Left(sName.GetLength()-2);
			sTagName.TrimLeft();
			sTagName.TrimRight();
		
			sLbl->sTagName = sTagName;			
			sLbl->LblNo = Cnt;
			sLbl->iTagInd = Cnt;			
			sLbl->PageNo = iPage;

		}
		LblList\[iPage\].AddTail(sLbl);

I am writing in to file in a seperate function

void Listtofile()
{
CFile gpFile;
if (!gpFile.Open( sFileName,CFile::modeCreate|CFile::modeWrite))
{
AfxMessageBox( sFileName + (CString)" - File Write Error");
return;
}
for(int iPage =0; iPage

It writes some thing if file and also i cannot read the file also.

Anu

Jochen Arndt

I don't know if this solves your problem, but this code may fail:

sTagName = (CString)czTagGetVal;
int pos = sTagName.Find("\n");
sName = sTagName.Left(pos-1);

pos is -1 when the string did not contain a line feed. If it contains multiple line feeds, all charaters at and right of it are removed. You are using a CString. So this may be better (removes also carriage returns):

sName.Remove('\n');
sName.Remove('\r');

CPallini

Anu_Bala wrote:

gpFile.Write(Pd,sizeof( struct SGraphLbl));

Since your struct contains a reference to a CString object, the above line is not the right way to serialize it (you're just writing the address of the CString to the file, while yout should write its content).

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