C++博客-宝杉的博客-最新评论http://www.cppblog.com/robinson119/CommentsRSS.aspxUNIX/LINUX;ACE;SNMP;C++zh-cnFri, 06 Nov 2009 01:41:00 GMTFri, 06 Nov 2009 01:41:00 GMTcnblogsre: CString,string,char*之间的转换http://www.cppblog.com/robinson119/archive/2009/11/23/22870.html#101681liubaosenliubaosenMon, 23 Nov 2009 01:58:00 GMThttp://www.cppblog.com/robinson119/archive/2009/11/23/22870.html#101681

liubaosen 2009-11-23 09:58 发表评论
]]>re: CString,string,char*之间的转换http://www.cppblog.com/robinson119/archive/2009/11/06/22870.html#100271溪流溪流Fri, 06 Nov 2009 01:41:00 GMThttp://www.cppblog.com/robinson119/archive/2009/11/06/22870.html#100271LZ 也没有搞得很清楚么。。。
另外，CString 可能是 CStringW/CStringA，在与 string 转换时，如果是 CStringW，还涉及编码转换问题。下面以 CStringA 来说明。

 

1 string to CString  

  CString.format("%s",string.c_str());

 

CStringA = string.c_str() 就可以了

 

2 CString to string

string str(CString.GetBuffer(str.GetLength()));

 

GetBuffer 有参数的话，可能导致内部的分配空间动作，要进行后续 ReleaseBuffer 操作。


string = CStringA


string = CStringA.GetBuffer();

 



3 string to char *

char *p=string.c_str();

4 char * to string

string str(char*);

5 CString to char *

strcpy(char *,CString,sizeof(char));

按照 3 风格，这里应该 char *  = CStringA; 或者 char *p = CStringA.GetBuffer();

 

6 char * to CString

CStringA = char * 就可以了

 



溪流 2009-11-06 09:41 发表评论
]]>re: CString,string,char*之间的转换http://www.cppblog.com/robinson119/archive/2009/11/05/22870.html#100233iccoloriccolorThu, 05 Nov 2009 09:10:00 GMThttp://www.cppblog.com/robinson119/archive/2009/11/05/22870.html#100233这个很好使，关键是你要加入库文件头。

iccolor 2009-11-05 17:10 发表评论
]]>re: example1http://www.cppblog.com/robinson119/archive/2009/08/24/30436.html#94227提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容Mon, 24 Aug 2009 02:37:00 GMThttp://www.cppblog.com/robinson119/archive/2009/08/24/30436.html#94227

提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容 2009-08-24 10:37 发表评论
]]>re: example1http://www.cppblog.com/robinson119/archive/2009/08/24/30436.html#94226提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容Mon, 24 Aug 2009 02:36:00 GMThttp://www.cppblog.com/robinson119/archive/2009/08/24/30436.html#94226

提交失败后,可以通过“恢复上次提交”恢复刚刚提交的内容 2009-08-24 10:36 发表评论
]]>re: CString,string,char*之间的转换http://www.cppblog.com/robinson119/archive/2008/10/22/22870.html#64704aliaoaliaoWed, 22 Oct 2008 08:26:00 GMThttp://www.cppblog.com/robinson119/archive/2008/10/22/22870.html#64704
strcpy(char,CString,sizeof(char)); 这里的参数是不是写借了？


aliao 2008-10-22 16:26 发表评论
]]>re: OTL 4.0, OTL concepthttp://www.cppblog.com/robinson119/archive/2008/10/14/30435.html#63979xiao_xiaoxiao_xiaoTue, 14 Oct 2008 11:18:00 GMThttp://www.cppblog.com/robinson119/archive/2008/10/14/30435.html#63979

xiao_xiao 2008-10-14 19:18 发表评论
]]>re: OTL 4.0, OTL concepthttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58141harveyharveyWed, 06 Aug 2008 06:28:00 GMThttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58141#define OTL_ODBC

而不是ＯＲＡＣＬＥ的例子

因为otl + oracle的例子网上非常多，
而otl + sqlServer的例子网上很少，

在这希望能起到抛砖引玉的作用。

harvey 2008-08-06 14:28 发表评论
]]>re: OTL 4.0, OTL concepthttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58140harveyharveyWed, 06 Aug 2008 06:25:00 GMThttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58140
以上是OTL中调用存储过程，得到出参的例子，ＯＴＬ说明书里是有的，但我也找了很久才找到的。网址是　http://otl.sourceforge.net/otl3_ex24.htm

需要注意以下
otl_stream o(1, stored procedure call
"{call my_proc("
　　　　　　　" :A<int,inout>, " //
　　　　　　　" :B<char[31],out>, " //
　　　　　　 　" :C<char[31],in> " //char[31], 和in之间不能有空格
　　　　　　　")}",
　　　　　　　db);


harvey 2008-08-06 14:25 发表评论
]]>re: OTL 4.0, OTL concepthttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58139harveyharveyWed, 06 Aug 2008 06:20:00 GMThttp://www.cppblog.com/robinson119/archive/2008/08/06/30435.html#58139
Source Code
#include <iostream>using namespace std;#include <stdio.h>#define OTL_ODBC_MSSQL_2005 // Compile OTL 4/ODBC, MS SQL 2005//#define OTL_ODBC // Compile OTL 4/ODBC. Uncomment this when used with MS SQL 7.0/ 2000#include <otlv4.h>otl_connect db; // connect objectvoid stored_proc(void)// invoking stored procedure{ otl_stream o(1, // buffer size should be equal to 1 in case of stored procedure call "{call my_proc(" " :A<int,inout>, " " :B<char[31],out>, " " :C<char[31],in> " ")}", // stored procedure call db // connect object ); o.set_commit(0); // set stream auto-commit off since // the stream does not generate transaction o<<1<<"Test String1"; // assigning :1 = 1, :3 = "Test String1" int a; char b[31]; o>>a>>b; cout<<"A="<<a<<", B="<<b<<endl;}int main(){ otl_connect::otl_initialize(); // initialize ODBC environment try{ db.rlogon("uid=scott;pwd=tiger;dsn=mssql"); // connect to ODBC otl_cursor::direct_exec (db, "CREATE PROCEDURE my_proc " " @A int out, " " @B varchar(60) out, " " @C varchar(60) " "AS " "BEGIN " " SELECT @A=@A+1" " SELECT @B=@C " "END" ); // create stored procedure stored_proc(); // invoking stored procedure } catch(otl_exception& p){ // intercept OTL exceptions cerr<<p.msg<<endl; // print out error message cerr<<p.code<<endl; // print out error code cerr<<p.var_info<<endl; // print out the variable that caused the error cerr<<p.sqlstate<<endl; // print out SQLSTATE message cerr<<p.stm_text<<endl; // print out SQL that caused the error } db.logoff(); // disconnect from the data source return 0;}
Output
A=2, B=Test String1


harvey 2008-08-06 14:20 发表评论
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