yes, thankyou!

Hi All, Is it possible to open the file twice? I am using CStdioFile, i created two objects of type CStdioFile and assigning the same file for both the objects. one file opened for writing(modeReadWrite) the data and the other file opened for reading(modeRead) the data. In this case my application is crashing. please give me some solution. CStdioFile obj1; CStdioFile obj2; obj1.Open("file1.txt", CStdioFile::modeReadWrite); ..... ..... ..... obj2.open("file1.txt", CStdioFile::modeRead); ..... ..... obj2.close(); .... ... obj1.close(); Thanks in advance! Regards, Anil

Hi All, I am reading some big files having thousands of lines, my requirement is to write some thing on the last but one line(i know the length of last line). how to seek my file pointer to last but one line with out seeking all the position from the beginning of the file? i tried with some code, but not achieving the right goal. please check the code

		long seekval = assfile.SeekToEnd();
		assfile.Seek((seekval - 4.0),0);
		assfile.WriteString(\_T("some text"));

assfile is the CStdioFile obj. 4 is the length of the last line. Thanks in advance. Regards, Kumar

Hi all, I am trying to convert CString value to double value. see below

               if(pos == 0)
		{
			assfile.ReadString(nextLine);
			pos = nextLine.Find(\_T(","));
			temp = nextLine.Left(pos);
			dValue = \_wtof(temp);    // dValue is double variable
			
			if (dValue < minval)
				minval = dValue;
		}

i am using _wtof() to convert string to double. The problem here is after conversion the double value has more decimal points every time. for example str = "234.555" after conversion the double value will be like this 234.55500005 i want the double value to be as it is in the string. how to resolve this? Thanks in advance. Regards, kumar

hi

Thanks Cedric! The given article is very help full Can't we convert the char array like this? Cstring str(charr); //charr is char array Regards, Kumar

Hi All, How to convert a char array into CString? I have one array like this char charr[1000]; .... drwFile.Read(charr,656); //reading some characters from the file CString str; how to store the charr array in to str? Regards, Kumar

HI, Along with strings and arrays i want to use CDilogs also, please provide the solution for adding the MFC stuff to CLR Console Application. Regards, Kumar

Thanks for your reply Superman :) still is there any way to use MFC in CLR Console Application? Thanks in advance. Regards, Kumar

Hi All, I am beginner to MFC programming. I created one CLR Console Applications project, here in this project I want to use MFC classes like CString,CArray,CFile....etc. In project settings I used "Use MFC in a shared DLL" And in project stdafx.h file I am adding

#include<afx.h>

I also used few classes from MFC in the application and complied, I am not getting any errors. But while running the application, I am facing crash in the application. and the error message is as follows An unhandled exception of type 'System.AccessViolationException' occurred in Unknown Module. Additional information:Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Please provide some solution for this. Thanks in advance. Regards, Kumar

Thank you very much Pallini :) The problem is fixed! Is there any documentation available on this topic. Regards, Anil

Dear Pallini thanks for your reply! I tried with \0 still dialog not filtering. please check the code below.

CFileDialog dlgFile(TRUE);
CString fileName;
const int c\_cMaxFiles = 100;
const int c\_cbBuffSize = (c\_cMaxFiles \* (MAX\_PATH + 1)) + 1;
dlgFile.GetOFN().lpstrFile = fileName.GetBuffer(c\_cbBuffSize);
dlgFile.GetOFN().nMaxFile = c\_cMaxFiles;
dlgFile.m\_ofn.lpstrInitialDir = m\_sWorkpathPdm;
dlgFile.m\_ofn.lpstrFilter = \_T("\*.sct\\0");
dlgFile.DoModal();
fileName.ReleaseBuffer();
if (!fileName.IsEmpty())
	m\_sMapFileName = fileName;
UpdateData(FALSE);

Regards, Anil

hi

Thanks Pallini :) I have problem with filter, i am adding filter like this dlgFile.m_ofn.lpstrFilter = _T("*.pdm"); it has to display all .pdm files, but its not displaying .pdm files in the dialog. please help me in this regard. Thanks in advance. Regards, Anil

Hi All, I am using CFileDialog class in my application to browse a file. when i click on browse always by default application is opening desktop folder. I have one default path how to open that path instead of desktop. Thanks in advance. Regards, anil

Thanks Maya! :) what you said is correct... but i solved that problem in different way, I guess this is the easiest way. any how I am keeping that code here, it will be helpful for others. I used CStdioFile instead of CFile, that really simplifies my work.

CStdioFile pdmFile;
CStdioFile pdmSecFile;

pdmFile.Open(m\_sPdmFileName, CStdioFile::modeRead);
pdmSecFile.Open(\_T("testpdms\_changed.pdm"),CStdioFile::modeCreate | CStdioFile::modeReadWrite);

CString sKey;
CString sValue;
POSITION pos;
while(pdmFile.ReadString(strLine))
{
	pos =  mapingStrings.GetStartPosition();
	while(pos != NULL)
	{
		mapingStrings.GetNextAssoc(pos, sKey, sValue);
		strLine.Replace(sKey,sValue);
	}
	pdmSecFile.WriteString(strLine);
	pdmSecFile.WriteString(\_T("\\n"));
}
pdmFile.Close();
pdmSecFile.Close();

Regards, Jo

hi

Thanks joe for your comments. i changed code like this to eliminate char array.

CFile pdmFile;
CFile pdmSecFile;

pdmFile.Open(\_T("c:\\\\strucadv15\\\\Work\\\\testpdms\\\\mod\\\\testpdms.pdm"),CFile::modeRead);
pdmSecFile.Open(\_T("c:\\\\strucadv15\\\\Work\\\\testpdms\\\\mod\\\\testpdms\_changed.pdm"),CFile::modeCreate | CFile::modeReadWrite);


CString strLinee;
totlen = pdmFile.GetLength();
for(int i = 0; i < totlen; i++)
{
	UINT lBytesRead = pdmFile.Read(ch,1);
	if(ch\[0\] == '\\n')
	{
		pdmSecFile.Write(strLinee, strLinee.GetLength());
		strLinee.Empty();
	}
	strLinee.AppendChar(ch\[0\]);
}
pdmFile.Close();
pdmSecFile.Close();

but still i got the same output like, after every character its appending one NULL please give me some solution. :) Regards, Jo

hi

Thanks joe :) i have one more problem. please check the code below here pdmFile,pdmSecFile are two CFile objs.

CString strLine;
totlen = pdmFile.GetLength();
for(int i = 0; i < totlen; i++)
{
	UINT lBytesRead = pdmFile.Read(ch,1);
	if(ch\[0\] == '\\n')
	{
		int totl = strLine.GetLength();

		TCHAR\* pStr = new TCHAR\[strLine.GetLength() + 1\];
		lstrcpy(pStr, strLine);

		pdmSecFile.Write(pStr, totl+1);
		delete \[\] pStr;
		pdmSecFile.Flush();
		strLine.ReleaseBuffer(); 
		strLine.Empty();
	}
	strLine.AppendChar(ch\[0\]);
}
pdmFile.Close();
pdmSecFile.Close();

iam trying to read each line from the first file and writing to second file. i am getting the out put but after every character its printing NULL character. please check the code and give me some solution to get the desired output. Thanks in advance! Regards, jo

hi

Hi, Is there any MFC method to convert CString object to char array? please tell me how to do this. Thanks in advance. Regards, jo

hi

thanks dude :)

hi

Hi, How to split a String(CString obj) in MFC based on some tokens like spaces. is there any method for this? Thanks in advance. Regards, srinu

hi

Is there any file browser control in MFC? my requirement is, the application should allow the user to browse a file, based on the user selection i should get the selected file name and the corresponding file path to do some operations on that file. please provide the solution for this problem, thanks in advance Regards, Anil

hi