C / C++ / MFC

19-Oct-09 21:13

Hi all, can comeone help me with this? I am having error with it. Thanks alot

CStdioFile fp2(_T("C:/abc"), CFile::modeRead | CFile::shareExclusive);
CString fp2_rdtxt;
while (fp2.Read(fp2_rdtxt, fp2_rdtxt.GetLength()) != EOF)
{
fp2_rdtxt.Format("%lf %lf %lf\n", &a, &b, &c);
.........
.........
}
fp2.Close();

Richard MacCutchan19-Oct-09 21:59

Richard MacCutchan

19-Oct-09 21:59

Nicholas Amh wrote:
Hi all, can comeone help me with this? I am having error with it. Thanks alot

Well you don't explain what your error is and I'm not an expert in MFC, but I can guess from the code above that you are fairly new to this. The line

while (fp2.Read(fp2_rdtxt, fp2_rdtxt.GetLength()) != EOF)

uses the GetLength() method on fp2_rdtxt, but you have not initialised the variable so it has no length. Hence you will not be able to read data into it. The statement

fp2_rdtxt.Format("%lf %lf %lf\n", &a, &b, &c);

will also not work in my view.
I suggest you spend some more time with the documentation and learn the fundamentals of these classes and their methods.

Nicholas Amh19-Oct-09 22:21

19-Oct-09 22:21

I am having error that shown below

Unhandled exception at 0x7c812afb in GUI2.exe: Microsoft C++ exception: CFileException at memory location 0x015ff79c..

fp2.Read(text, text.Getlength()) can't work

Richard MacCutchan19-Oct-09 22:52

Richard MacCutchan

19-Oct-09 22:52

Nicholas Amh wrote:
fp2.Read(text, text.Getlength()) can't work

That's what I previously explained to you. Please read the documentation and learn how to use variables, classes, their properties and methods.

theCPkid19-Oct-09 22:28

19-Oct-09 22:28

CStdioFile ipFile;

if(ipFile.Open(_T("C:\\abc.txt"), CFile::modeRead | CFile::shareExclusive | CFile::typeText) == 0)
{
    cout<<"unable to open file.";
    return 0;
}

CString str;

while( ipFile.ReadString(str) != NULL)
{
    cout<<str<<endl;
}

ipFile.Close();

This code works inside your project? no?

Nicholas Amh19-Oct-09 23:11

19-Oct-09 23:11

Hi, Thanks for helping out. But it don't work.

theCPkid19-Oct-09 23:11

19-Oct-09 23:11

some error, exception or just wrong output?

Nicholas Amh19-Oct-09 23:29

19-Oct-09 23:29

Thank you theCPkid. I knew where is the error. I can't put CFile::shareExculsive or shareDenyRead ot etc. Thanks alot

theCPkid19-Oct-09 23:42

19-Oct-09 23:42

glad your problem is solved now.

coloring a button

ratprita19-Oct-09 20:28

ratprita

19-Oct-09 20:28

Anyone know how to color the background , Text and the border of the an owner drawn CButton ?

theCPkid19-Oct-09 20:52

19-Oct-09 20:52

[this]shows how to set text color. inside the same function, you can draw a background color and border.

Iain Wiseman19-Oct-09 20:54

Iain Wiseman

19-Oct-09 20:54

http://www.codeguru.com/forum/archive/index.php/t-225925.html[^] might help

Nishad S19-Oct-09 22:07

Nishad S

19-Oct-09 22:07

Have a look at this[^]

- ns ami -

Naveen19-Oct-09 22:07

Naveen

19-Oct-09 22:07

There is no simple set functions to change the color of a button. You have to owner draw it. She the Owner Draw Button Step-by-Step [^] article.

nave

[OpenedFileFinder] [My Blog]

modified on Wednesday, October 21, 2009 8:04 AM

carly3321-Oct-09 0:34

carly33

21-Oct-09 0:34

No.
You can use Shell buttons