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hello "kakan"
I used the method u specified but its giving the following error
C:\Program Files\Microsoft Visual Studio\MyProjects\interface\interfacedialog1.cpp(245) : error C2440: 'initializing' : cannot convert from 'const char *' to 'char *'
Thanx
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Hello.
That's right, operator LPCTSTR returns a const char * (The 'C' stands for 'const')
The reason for returning a const char * is that the contents of what the const char * points to must be unaltered.
So if you call a function that acually changes the content of the CString, then you have to use the CString methods GetBuffer() and ReleaseBuffer().
GetBuffer() returns a LPTSTR (a char *).
But if you use GetBuffer(), then you must call ReleaseBuffer()
So in your case, use GetBuffer() and ReleaseBuffer().
And check out the CString documentation at MSDN.
I.e here[^]
Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson
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namy1 wrote: basically i have a cstring and i want to use one function which takes char * parameters now i want to pass the value that is in cstring to this function how can i do that
Well if _UNICODE is defined then you will have to do some additional chores for converting to char* (Read this[^] for more info), else it's quite easy
CString csStr = "Non unicode string";
char *szStr = csStr.GetBuffer(0);
AFunctionToCall( szStr );
csStr.ReleaseBuffer(); Well if you need a const char*, it's much more easier
CString csStr = "Non unicode string";
const char* szStr = csStr;
AFunctionToCall( szStr );
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use CString::GetBuffer() with CString::GetLength() to copy the enitre string into the char*.
<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[![Jig | [Dance]](https://codeproject.freetls.fastly.net/script/Forums/Images/jig.gif) ]--
[My Current Status]
Link2006 wrote:Let's take it outside of CP
Jeremy : Please don't.I would love to see this.I'm making the popcorn already.
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Unless a copy is actually what is desired, there is no need to copy the data for this. GetBuffer returns a valid char* that can be used until you call ReleaseBuffer (at which time the CString object will be updated with the changes you made to the buffer).
If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week
Zac
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CString is replacable with char, ie you can put in a CString when a char[] is required.
try putting in a reference to your CString ie &string
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I use SHBrowseForFolder to display folder select dialog. How detect folder change (create new, delete, ...) while this dialog displaying.
Thank for your answer.
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Can you be more specific.
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I use SHBrowseForFolder to display BrowforFolder dialog box.
And i create a button to create new folder.
Then, i don't know how to refresh the BrowseforFolder dialog box to update this folder i've created.
Yes, i know in SHBrowseForFolder has the new style dialog which may help us to create new folder.
But i want to create by my self and update to BrowforFolder dialog box is displyaing.
thank for your help.
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Hope I understood your question
if you want to insert your buttons to SHBrowseForFolder for update or delete I see exmples of SHBrowseForFolder on codeproject
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To update folder dialog, you can do follow:
Use SHGetPathFromIDList( m_bi.pidlRoot, pszPath ) to get root folder path
Use IShellFolder::ParseDisplayName to convert root folder path to LPITEMIDLIST (pidlRoot)
Assign this pointer (pidlRoot) to m_bi.pidlRoot:
m_bi.pidlRoot = pidlRoot;
to refresh folder dialog.
This code i didn't test, but i think it can do.
-----------------
Best Regards,
Le Thanh Cong
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How can i write a select SQL statement for the DB that uses the string from CEdit1 ?
lets say database name : "Names_City" class : CNames_City
col 1 : "name"
col 2 : "city"
col 3 : "country"
CEdit1 : "m_name"
CEdit2 : "m_city"
CEdit3 : "m_country"
1) i have onChange for "m_name .When i write some txt in m_name i need to search in "Names_City > name = and if it matches i need the city in m_city and the country in m_country "
2)when i write in m_city and then in m_name i need to search in "name","city" and if m_name == "name" and m_city == "city" i need "country" in m_country.
* Remember i have ~260.000 Records ;
thank you in advance !
- please i need that information !
Bravoone
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I wrote an example of SELECT for you did you see it?
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yes but i dont understand it please write again for this example !
Bravoone
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I think you need to reading a book about sql.For example you have a table1 with three cols you can use:
SELECT col1,col2,col3 FROM table1 WHERE name LIKE '%hello%'
(you can ask your question about sql on SQL / ADO / ADO.NET forum)
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this i dont understand what is this :'%hello%' i need to search for the string lets say CString sName ;
m_name.GetWindowText(sName);
Bravoone
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with LIKE you can retrive rows you can use LIKE with char,varchar,...
and in LIKE you have
% strings of any or some characters
- a character and,[],...
In VC you read your data with GetWindowText and insert your data to a statement sql
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i think i start to understand the ideea but for that i need an ... example to understand thats way i request examples !
please , please , please write the SQL statement and m_name.GetWindowText( -->HERE<-- what!) for full understand !
thanks , and i will wait your answer ! please ...
-- modified at 3:08 Friday 22nd September, 2006
How can i write a select SQL statement for the DB that uses the string from CEdit1 ?
lets say database name : "Names_City" class : CNames_City
col 1 : "name"
col 2 : "city"
col 3 : "country"
CEdit1 : "m_name"
CEdit2 : "m_city"
CEdit3 : "m_country"
1) i have onChange for "m_name .When i write some txt in m_name i need to search in "Names_City > name = and if it matches i need the city in m_city and the country in m_country "
2)when i write in m_city and then in m_name i need to search in "name","city" and if m_name == "name" and m_city == "city" i need "country" in m_country.
Bravoone
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i have try with CListCtrl you now , but it takes 5-6 mun to fill my list with data from DB and is not good maybe this is the solution my only problem is this : i want to search into DB from CEdit and i need to do fast !
Bravoone
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Dear Bravoone_2006,
This forum is VC not SQL maybe some members dont like to see these threads that is for sql but I think you can see MSDN for learning SQl without know sql your work is hard.Two Strings first string for read of editbox and another string for sql statement and also see CString::Insert
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seriously, did you understand what i told you yesterday[^] ???
couldn't you just write a more explicit Subject for your thread once again ? 
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Bravoone, Please remove those Guards around the title. It looks annoying.
write a function searchName that gets CString as the param.
<br />
searchName(CString)<br />
{<br />
// Though you can right a select statment straight from here, better create a stored procedure to find name.
//Call the Stored procedure here. In your stored procedure have an Ouput Parameter that returns the found name.
CString csFoundCity;
//So, you take this returned value in a CString.
<br />
m_city.SetWindowText(csFoundCity);<br />
so in m_city's onchange, call similar function that searches and fills the corresponding CEdits.
<br />
}<br />
<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[ ]--
[My Current Status]
Link2006 wrote:Let's take it outside of CP
Jeremy : Please don't.I would love to see this.I'm making the popcorn already.
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can you ... write more because i dont now what do you mean ?!
Bravoone
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hi
i m using openfilemapping function in vc++ and sometimes it will return error code 20 that means Error-bad unit.if any one knows can u please tell me what is the reason of this error and how to resolve this problem.
thanks in advance.
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