drive;CString

COrderProcJH::is_db_tbl_exist()

{return

COrderProcBase::is_db_tbl_exist(_T(TBL_FILE_JH));

回调赋值实现

COrderProcBase::is_db_tbl_exist(TCHAR*

pszTblName)

szBuf[4096];TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC

param;do

pszTblName){break;}memset(szBuf,

SELECT

getLogicProxy()-my_W2A(pszTblName).c_str());str_sql

szBuf;str_utf8_sql

getLogicProxy()-UnicodeToUTF8(getLogicProxy()-my_A2W(str_sql));param.pThis

this;param.pFn

COrderProcBase::callback_for_sqlite3_exec_proc_tbl_exist;param.row_set.clear();//

为参数3,

COrderProcBase::callback_for_sqlite3_exec_dispatch,

param,

getLogicProxy()-UTF8ToUnicode(zErrMsg).c_str());getLogicProxy()-addTips(csMsg);break;}//

等sql执行完,

procResultSet_isTblExist(param.row_set,

pszTblName);}

PFN_CALLBACK_FOR_SQLITE3_EXEC是sqlite3_exec回调要求的函数样式

typedef

PFN_CALLBACK_FOR_SQLITE3_EXEC)(void*

data,

_tag_param_callback_for_sqlite3_exec{COrderProcBase*

pThis;

执行到类的普通成员函数PFN_CALLBACK_FOR_SQLITE3_EXEC

pFn;

本类中实际的回调处理函数指针(类的普通成员函数)C_my_row_set

row_set;

这里是装在返回行集的类}TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC;回调分发函数的实现

int

COrderProcBase::callback_for_sqlite3_exec_dispatch(void*

data,

0;TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC*

param;do

(TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC*)data;if

((NULL

这里就可以执行sqlite3_exec指定的回调函数了(任意类,

这个回调分发函数基本不用再改.i_rc

((param-pThis)-*(param-pFn))(data,

argc,

COrderProcBase::callback_for_sqlite3_exec_proc_tbl_exist(void*

data,

0;TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC*

param;int

(TAG_PARAM_CALLBACK_FOR_SQLITE3_EXEC*)data;C_my_row

row;C_my_key_val

argv[i];row.m_list.AddTail(key_val);}//

回调进来一次,

就是一行param-row_set.m_list.AddTail(row);}

while

COrderProcBase::procResultSet_isTblExist(C_my_row_set

row_set,

row_set.m_list.GetSize()){break;}for

(pos

row_set.m_list.GetHeadPosition();

(NULL

row_set.m_list.GetNext(pos)){row

row.m_list.GetSize()){break;}for

(pos1

row.m_list.GetNext(pos1)){b_stop

true;key_val

row.m_list.GetAt(pos1);memset(szBuf,

sizeof(szBuf));_stprintf(szBuf,

_T(EXISTS(SELECT