Reading Text line from .txt File

Hello
I want to read line from txt file when i pressed the button
please any one have code using MFC.

Read up on CStdioFile

CStdioFile inFile;
CFileException efile;
CString strFirstLine;
inFile.Open("test.txt",CFile::modeRead|CFile::typeText);
inFile.ReadString(strFirstLine);

m_List1.AddString(inFile);


am doing this , but giving me error

When i Used fstream..

CString str,Str1;
int a;


UpdateData();

str= m_EditBox;

fout.open("abc.txt");
fout<< "Name";
fout.close();
ifstream in;
in.open("abc.txt");
while(!in.eof())
{
in >> Str1; /// Error Comes here no operator ">>" matches these operands

}
UpdateData(FALSE);
m__myListBox.AddString(Str1);

use ifstream with char or char string.

Code:

---

char readStr[512];

ifstream myFile("fileName");
while (!myFile.eof())
{
  myFile >> readStr;
}

myFile.close();

---

And from next post use CODE tag.

Thanks for the Help.
I did this but this time nothing is getting in the ReadStr variable :(

It perfectly does. Check the loop, it read and store each strings from file, then again reads next string. For storing all string in a single buffer you need to add each readStr in a buffer. ie:

Code:

---

while (!myFile.eof())
{
  myFile >> readStr;
  szBuf += readStr;    //CString szBuf
}

// now you have all the txt from file in CString szBuf here.

---

Check the file name and path for be sure that you are reading correct file.

And for using fstream did you put using namespace std; at the top. ?

Yup i did..its working :)
in this program i given the string.
Now i am trying to do to take string from the Edit Box but its not Writing in the file puts ASCI and radam numbers

Quote:

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Originally Posted by adnan86

Code:

---

CStdioFile inFile;
        CFileException efile;
        CString strFirstLine;       
        inFile.Open("test.txt",CFile::modeRead|CFile::typeText);
        inFile.ReadString(strFirstLine);

        m_List1.AddString(inFile);

---

am doing this , but giving me error

---

1. Please, use Code tags around code snippets.
2. To help us to help you you should always explain what exact error you had and, if possible, show the exact error message.
3. What is m_List1? Is it a CListBox instance? If *yes* then what can it have to do with a CStdioFile object passed in as a parameter? :confused:
You, perhaps, wanted to pass in the CString strFirstLine object containing the text you had read from a file?

VictorN thanks for your reply. this prob is solved
now i want to write data from the Edit Box.. its writing random numbers not the string

@code:
ofstream Students("test.txt", ios::out);
CString name;
name=m_editbox;
Students << name ;
Students.close();

I think you need some books and study about windows programming (as well as basic c++) then try to develop some application, rather than asking each steps in forum.

I dont know eactly how to tag code...SOrry :(

hypheni : Yup i am new to MFC Windows programming. i asked for the related to this ..but no body tell me, so thats why am facing problem in syntax mostly

Quote:

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Originally Posted by adnan86

hypheni : Yup i am new to MFC Windows programming. i asked for the related to this ..but no body tell me, so thats why am facing problem in syntax mostly

---

New to MFC, Start off with some windows programming book then move to MFC.

Quote:

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Originally Posted by adnan86

...
now i want to write data from the Edit Box.. its writing random numbers not the string

@code:
ofstream Students("test.txt", ios::out);
CString name;
name=m_editbox;
Students << name ;
Students.close();

---

As you were already told in your another thread:

Quote:

---

Originally Posted by GCDEF

... CStdioFile makes more sense in an MFC app than streams because it will write directly to a CString and uses MFC Exceptions.

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hypheni : Can you tell me any which is related to the Windows Programming.?
Iwil be very very thankful to you
VictorN: Thanks Buddy so nice of you

Any what book ?.

then start off with this.

Quote:

---

Originally Posted by adnan86

CStdioFile inFile;
CFileException efile;
CString strFirstLine;
inFile.Open("test.txt",CFile::modeRead|CFile::typeText);
inFile.ReadString(strFirstLine);

m_List1.AddString(inFile);


am doing this , but giving me error

---

Nevertheless, it's still the best approach. Getting and fixing errors is part of programming. Why are you passing a CStdilFile to your list? The compiler probably told you exactly what was wrong.

You're still just guessing and that still isn't working for you.

Hey, why not try CFile ? Cstdiofile is different from cfile

Quote:

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Originally Posted by Sharpie

Hey, why not try CFile ? Cstdiofile is different from cfile

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How would that help in this situation?

Quote:

---

Originally Posted by Sharpie

Hey, why not try CFile ? Cstdiofile is different from cfile

---

1. Yes. CStdioFile is different from CFile, however, it is derived from CFIle.
2. None of CFile methods takes CString as a parameter, however CStdioFile::ReadString and CStdioFile::WriteString do. And it is what OP needs!