将变量传递给SQL

问题描述

我有一个变量，它是IP地址.它以文本形式保存在Access 2010数据库中.我正在尝试使用ipSrc运行此查询，并且该查询始终失败.我的猜测是，它将ipSrc视为ipSrc而不是实际的IP地址.我用ipsrc和普通的ipSrc尝试过，但都失败了.还尝试了"ipSrc"，也失败了.失败了. "& ipSrc".这是声明.

I have a variable that is an IP address. It is saved as text in my Access 2010 database. I am trying to run this query with ipSrc and the query always fails. My guess is that its seeing ipSrc as ipSrc and not as the actual IP address. I tried it with ''ipSrc'' and just plain ipSrc and both reurn fail. Also tried ""ipSrc"", failed as well. This failed to. ''&ipSrc''. Here is the statement.

SQLCHAR* query = (SQLCHAR*)"SELECT tblIP.[IPAddress], tblIP.[IPType], tblIP.[IPStatus], tblIP.[IPMax] FROM tblIP WHERE tblIP.[IPAddress]= ipSrc AND tblIP.[IPType]=3 AND tblIP.[IPStatus]=1 AND tblIP.[IPMax]=0;";

这是ipSrc的定义.

and here is the definition of ipSrc.

translate_ip(ip_header->source_ip, ipSrc);

使用printf可以将其打印为实际IP地址.

Using printf it prints out as an actual IP address.

printf("\n   Source      IP: %s", ipSrc);

推荐答案

char buffer[1024] = {0,};
sprintf(buffer,"SELECT tblIP.[IPAddress], tblIP.[IPType], tblIP.[IPStatus], tblIP.[IPMax] FROM tblIP WHERE tblIP.[IPAddress]= %s AND tblIP.[IPType]=3 AND tblIP.[IPStatus]=1 AND tblIP.[IPMax]=0;",ipSrc);
SQLCHAR* query = (SQLCHAR*)buffer;

一行用于sprintf调用

最好的问候
Espen Harlinn

Use a single line for the sprintf call

Best regards
Espen Harlinn

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