前言
本文给大家展示的代码实际上就是如何利用Sqlite3的参数化机制做数据插入，也可以update操作，就看你怎么玩了，这里只列出代码，然后说一些注意事项。
下面的代码，有一个问题，插入后的东西一定是：
INSERT INTO "work" VALUES('铪','铪铪铪铪铪',NULL,NULL,NULL,NULL,'铪铪铪铪铪',NULL,NULL,110.0,1.0,108.9,NULL,NULL,'铪铪铪铪铪',NULL,NULL,NULL,'铪铪铪铪铪',NULL,NULL,NULL);
看看有问题的代码：
sqlite3_stmt *stmt;
CString sql = "insert into work values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
int rc = sqlite3_prepare_v2(db, sql.GetString(), -1, &stmt, NULL);
if(rc != SQLITE_OK) {
MessageBox("sqlite3_prepare_v2 Failed!");
return;
}
count = 0;
p_wnd = PrevWnd;
while(count++ < ID_TOTALCOUNT) {
CString DbStr;
p_wnd = CWnd::GetNextDlgTabItem(p_wnd, FALSE);
if(p_wnd == NULL) {
return;
}
p_wnd->GetWindowText(DbStr);
do {
if(!DbStr.GetLength()) {
rc = sqlite3_bind_null(stmt, count);
break;
}
//日期相关 if( count == ID_CHUDANRIQI || count == ID_CHUFARIQI || count == ID_HUANKUANRIQI || count == ID_HUOLIRIQI) {
CDateTimeCtrl *TimeCtl = (CDateTimeCtrl *)p_wnd;
CString time = DateTimeToString(*TimeCtl);
rc = sqlite3_bind_text(stmt, count, time.GetString(), time.GetLength(), SQLITE_STATIC);
break;
}
else {
//金钱相关的处理real类型 if( count == ID_BAOXIANJINE || count == ID_YONGJINBILV || count == ID_JINGBAOFEI || count == ID_HUANKUANJINE || count == ID_LIRUNBILV || count == ID_LIRUNJINE) {
double tMoney = 0.0;
int rtn = sscanf_s(DbStr.GetString(), "%lf", &tMoney);
ASSERT(rtn == 1);
rc = sqlite3_bind_double(stmt, count, tMoney);
}
else {
char *str = (char *)DbStr.GetString();
int c = strlen(str);
int c1 = DbStr.GetLength();
rc = sqlite3_bind_text(stmt, count, DbStr.GetString(), -1/*DbStr.GetLength()*/, SQLITE_STATIC);
}
}
}
while(0);
if(rc != SQLITE_OK) {
CString ErrStr = sqlite3_errstr(rc);
MessageBox(ErrStr);
return;
}
}
rc = sqlite3_step(stmt);
if(rc != SQLITE_DONE) {
if(rc == SQLITE_ERROR) {
CString DbErr;
DbErr.Format("Sql Insert failed, %s", sqlite3_errmsg(db));
MessageBox(DbErr);
}
else {
MessageBox("sqlite3_step Failed!");
}
}
sqlite3_finalize(stmt);
为什么呢？
因为，sqlite3_bind_text绑定的text，需要在做：
rc = sqlite3_step(stmt);
的时候统一提交，而上面的代码使用的临时变量，rc = sqlite3_step(stmt);的时候，早就不存在了。因此乱码也是正常的。
修改如下：
sqlite3_stmt *stmt;
CString sql = "insert into work values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
int rc = sqlite3_prepare_v2(db, sql.GetString(), -1, &stmt, NULL);
if(rc != SQLITE_OK) {
MessageBox("sqlite3_prepare_v2 Failed!");
return;
}
count = 0;
p_wnd = PrevWnd;
CString DbStr[ID_TOTALCOUNT + 1];
while(count++ < ID_TOTALCOUNT) {
DbStr[count].Empty();
p_wnd = CWnd::GetNextDlgTabItem(p_wnd, FALSE);
if(p_wnd == NULL) {
return;
}
p_wnd->GetWindowText(DbStr[count]);
do {
if(!DbStr[count].GetLength()) {
rc = sqlite3_bind_null(stmt, count);
break;
}
//日期相关 if( count == ID_CHUDANRIQI || count == ID_CHUFARIQI || count == ID_HUANKUANRIQI || count == ID_HUOLIRIQI) {
CDateTimeCtrl *TimeCtl = (CDateTimeCtrl *)p_wnd;
CString time = DateTimeToString(*TimeCtl);
DbStr[count] = time;
rc = sqlite3_bind_text(stmt, count, time.GetString(), time.GetLength(), SQLITE_STATIC);
}
else {
//金钱相关的处理real类型 if( count == ID_BAOXIANJINE || count == ID_YONGJINBILV || count == ID_JINGBAOFEI || count == ID_HUANKUANJINE || count == ID_LIRUNBILV || count == ID_LIRUNJINE) {
double tMoney = 0.0;
int rtn = sscanf_s(DbStr[count].GetString(), "%lf", &tMoney);
ASSERT(rtn == 1);
rc = sqlite3_bind_double(stmt, count, tMoney);
}
else {
rc = sqlite3_bind_text(stmt, count, DbStr[count].GetString(), DbStr[count].GetLength(), SQLITE_STATIC);
}
}
}
while(0);
if(rc != SQLITE_OK) {
CString ErrStr = sqlite3_errstr(rc);
MessageBox(ErrStr);
return;
}
}
rc = sqlite3_step(stmt);
if(rc != SQLITE_DONE) {
if(rc == SQLITE_ERROR) {
CString DbErr;
DbErr.Format("Sql Insert failed, %s", sqlite3_errmsg(db));
MessageBox(DbErr);
}
else {
MessageBox("sqlite3_step Failed!");
}
}
sqlite3_finalize(stmt);
附上数据库创建的sql语法：
sqlite> .dump workPRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE work (baodanhao text unique primary key , chudanriqi text,qudao text,lianxiren text,xiaoshou text,beibaorenxingming text,chufariqi text,baoxianpinpai text,baoxianjihua text,baoxianjine real,yongjinbilv real,jingbaofei real,huankuanfangshi text,haikuanjine real,huankuanriqi text,shifouquane text,lirunbilv real,lirunjine real,huoliriqi text,fapiaojisong text,shifubaoxiangongsi text,beizhu text);
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对脚本之家的支持。
