ASP.NET 防止SQL注入式攻击

using System;

namespace Theme.Services.Public
{
/// <summary>
/// SqlstrAny 的摘要说明。
/// </summary>
public class ProcessRequest
{
public ProcessRequest()
{
//
// TODO: 在此处添加构造函数逻辑
//
}

#region SQL注入式攻击代码分析
/// <summary>
/// 处理用户提交的请求
/// </summary>
public void StartProcessRequest()
{
try
{
string getkeys = "";
string sqlErrorPage = System.Configuration.ConfigurationSettings.AppSettings["CustomErrorPage"].ToString();
if (System.Web.HttpContext.Current.Request.QueryString != null)
{

for(int i=0;i<System.Web.HttpContext.Current.Request.QueryString.Count;i++)
{
getkeys = System.Web.HttpContext.Current.Request.QueryString.Keys[i];
if (!ProcessSqlStr(System.Web.HttpContext.Current.Request.QueryString[getkeys]))
{
System.Web.HttpContext.Current.Response.Redirect (sqlErrorPage+"?errmsg=sqlserver&sqlprocess=true");
System.Web.HttpContext.Current.Response.End();
}
}
}
if (System.Web.HttpContext.Current.Request.Form != null)
{
for(int i=0;i<System.Web.HttpContext.Current.Request.Form.Count;i++)
{
getkeys = System.Web.HttpContext.Current.Request.Form.Keys[i];
if (!ProcessSqlStr(System.Web.HttpContext.Current.Request.Form[getkeys]))
{
System.Web.HttpContext.Current.Response.Redirect (sqlErrorPage+"?errmsg=sqlserver&sqlprocess=true");
System.Web.HttpContext.Current.Response.End();
}
}
}
}
catch
{
// 错误处理: 处理用户提交信息!
}
}
/// <summary>
/// 分析用户请求是否正常
/// </summary>
/// <param name="Str">传入用户提交数据</param>
/// <returns>返回是否含有SQL注入式攻击代码</returns>
private bool ProcessSqlStr(string Str)
{
bool ReturnValue = true;
try
{
if (Str != "")
{
string SqlStr = "and |exec |insert |select |delete |update |count | * |chr |mid |master |truncate |char |declare ";
string[] anySqlStr = SqlStr.Split('|');
foreach (string ss in anySqlStr)
{
if (Str.IndexOf(ss)>=0)
{
ReturnValue = false;
}
}
}
}
catch
{
ReturnValue = false;
}
return ReturnValue;
}
#endregion

}
}

// System.Configuration.ConfigurationSettings.AppSettings["CustomErrorPage"].ToString(); 这个为用户自定义错误页面提示地址,
//在Web.Config文件时里面添加一个 CustomErrorPage 即可
//<!-- 防止SQL数据库注入攻击的出错页面自定义地址 -->
// <add key="CustomErrorPage" value="../Error.html" />