CString return
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You said: "The index is 4" and "rite now listbox has only one entry." Are you calling CListBox::GetText( 4, _case) in a CListBox that has only 1 entry?
Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words -
Okey let me explain in detail. void CMyProj::OnSelchangeList() { CClientdemoDlg dlgobj; dlgobj.OnClientChangeListbox(); } void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnTextList(); } CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } notice the classes....... NT -- modified at 5:54 Thursday 16th August, 2007 NT
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You said: "The index is 4" and "rite now listbox has only one entry." Are you calling CListBox::GetText( 4, _case) in a CListBox that has only 1 entry?
Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words -
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Okey let me explain in detail. void CMyProj::OnSelchangeList() { CClientdemoDlg dlgobj; dlgobj.OnClientChangeListbox(); } void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnTextList(); } CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } notice the classes....... NT -- modified at 5:54 Thursday 16th August, 2007 NT
tyagineha wrote:
void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnText(); }
But in your example you show the code for CMyProj::OnTextList(). It seems as you think you are calling CMyProj::OnTextList(), but in your sample you call CMyProj::OnText() Maybe you should look for the problem in CMyProj::OnText() ?
Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson
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Okey let me explain in detail. void CMyProj::OnSelchangeList() { CClientdemoDlg dlgobj; dlgobj.OnClientChangeListbox(); } void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnTextList(); } CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } notice the classes....... NT -- modified at 5:54 Thursday 16th August, 2007 NT
Ok. What and where is your Error? Not just "Debug Assert", but complete details, please. I get from what you have written, that
_caseist still OK, but after it has been assigned to_tempit is no longer OK?
Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words -
Okey let me explain in detail. void CMyProj::OnSelchangeList() { CClientdemoDlg dlgobj; dlgobj.OnClientChangeListbox(); } void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnTextList(); } CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } notice the classes....... NT -- modified at 5:54 Thursday 16th August, 2007 NT
So you corrected your code sample without telling anyone? I suggest you do like this: 1. Learn how to use the debugger. (It's not too hard). 2. Put a breakpoint on this line: _temp=objnew.OnTextList(); 3. Single-step your code, line by line and examine what's happening. That's it. And that's exactly what other people do, IMO. For a good reason.
Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson
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Okey let me explain in detail. void CMyProj::OnSelchangeList() { CClientdemoDlg dlgobj; dlgobj.OnClientChangeListbox(); } void CClientdemoDlg::OnClientChangeListbox() { CMyProj objnew; CString _temp; _temp=objnew.OnTextList(); } CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } notice the classes....... NT -- modified at 5:54 Thursday 16th August, 2007 NT
Short answer: You have created an object of type CClinetdemoDlg but you have not created the actual dialog. The call to both GetCurSel and GetText will fail because they required a window to operate on. Long answer: You appear to be creating lots of temporary instances of the dialog and your CMyProj class. The act of creating the instance does NOT associate the just-created instance with the already existing one. In OnSelChangeList, you create a CClientdemoDlg. This is NOT associated with the actual dialog that I assume you created elsewhere. You then call OnClientChangeListbox in an instance not associated with a window. This causes the problem I mentioned earlier. Also, in that function, you create an instance of CMyProj. This instance is NOT the same as the one that called the function. This is important because you then call OnTextList in the just-created instance of CMyProj and in that function reference the member variable m_caselist. This variable is not the same as the one in the original class that started this calling chain. Accessing this variable will not affect the original caller. Judy
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What line of what file is asserting?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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i m using following function in my project but gtng an exception error: CString CMyProj::OnTextList() { int index; CString _case; index = m_caselist.GetCurSel(); m_caselist.GetText(index,_case); return _case; } can any body tell me why i m getting error in this code????????? NT
tyagineha wrote:
can any body tell me why i m getting error in this code?????????
You failed to indicate the error. We are not mind readers. :rolleyes: Set a breakpoint on the
GetCurSel()statement and single-step over each statement, noting the values ofindexand_casealong the way.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne