【CGI-C语言】成绩管理系统----之删除用户中间操作-优快云博客

本文介绍了一个使用CGI程序实现的用户删除确认流程。该程序通过读取环境变量获取待删除用户名，并从数据库中查询匹配的用户信息进行展示，以便管理员确认是否执行删除操作。涉及ODBC数据库连接及SQL查询。

tmp_deleteuser.c

#include "stdio.h"

#include "stdlib.h"
#include "string.h"
#include <windows.h>
#include <sqlext.h>
#include <sqltypes.h>
#include <odbcss.h>
void main()
{
char * data;
char * data1;
char username[10];
SQLHENV henv;
SQLHDBC hdbc;
SQLHSTMT hstmt;
SQLRETURN retcode;
UCHAR sql1[79]="select * from usr";

data=getenv("HTTP_COOKIE");
data1=getenv("QUERY_STRING");

sscanf(data1,"user=%s",username);

printf("Contenttype:text/html\n\n");
printf("<html><head><title>用户列表</title></head><body>");
if(data!=NULL&&strcmp(data,"i=1")==0)
{
printf("<h1>确认删除吗？");
printf("<table border=1>");

retcode=SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&henv);
if(retcode==SQL_SUCCESS || retcode==SQL_SUCCESS_WITH_INFO)
{
retcode=SQLSetEnvAttr(henv,SQL_ATTR_ODBC_VERSION,(void*)SQL_OV_ODBC3,0);
if(retcode==SQL_SUCCESS || retcode==SQL_SUCCESS_WITH_INFO)
{
retcode=SQLAllocHandle(SQL_HANDLE_DBC,henv,&hdbc);
if(retcode==SQL_SUCCESS || retcode==SQL_SUCCESS_WITH_INFO)
{
retcode=SQLConnect(hdbc,(SQLCHAR*)"Csql",SQL_NTS,(SQLCHAR*)"sa",SQL_NTS,(SQLCHAR*)"sa",SQL_NTS); //可修改，数据源，用户名，密码
if(retcode==SQL_SUCCESS || retcode==SQL_SUCCESS_WITH_INFO)
{
retcode=SQLAllocHandle(SQL_HANDLE_STMT,hdbc,&hstmt);
if(retcode==SQL_SUCCESS || retcode==SQL_SUCCESS)
{

char list_usrname[10];

SQLINTEGER p=SQL_NTS;

SQLPrepare(hstmt,sql1,79);

SQLExecDirect(hstmt,sql1,79);

SQLBindCol(hstmt,1,SQL_C_CHAR,list_usrname,10,&p);

while(1)
{
retcode=SQLFetch(hstmt);

if(retcode == SQL_ERROR)
{
break;

}
if(retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO)
{
int p;
for(p=0;p<strlen(list_usrname);p++)
{
if(list_usrname[p]==' ')
{
list_usrname[p]='\0';
break;
}
}

if(strcmp(username,list_usrname)==0)
{

printf("<tr><td>%s</td><td><a href=/cgi-bin/gm/deleteuser.cgi?user=%s>删除</a></td></tr>",list_usrname,list_usrname);

}
}
if(retcode == SQL_NO_DATA)
{
break;
}
}

printf("</table>");
printf("</body></html>");

}
SQLDisconnect(hdbc);
}
SQLFreeHandle(SQL_HANDLE_DBC,hdbc);
}
}
}

}
else
{
printf("你无权限访问该网页，请登录<br>");
printf("<a href=/gm/login.html>登录</a>");
printf("</body></html>");
}

}