iis6下注册httphanlder
<httpHandlers>
<add verb="GET,HEAD" path="*.jpg" type="ImageServer.ImgRequestHandler,img" validate="false" />
<add verb="GET,HEAD" path="*.gif" type="ImageServer.ImgRequestHandler,img" validate="false" />
<add verb="GET,HEAD" path="*.png" type="ImageServer.ImgRequestHandler,img" validate="false" />
</httpHandlers>

<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<handlers>
<add name="img" path="*.jpg" verb="*" scriptProcessor="C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" type="ImageServer.ImgRequestHandler" resourceType="Unspecified" requireAccess="Script" preCondition="integratedMode" />
</handlers>
</system.webServer>

都注册，iis下还是没有调用，什么问题

[解决办法]
重启下iis
呢