注意：win+R 后cmd 
1：解除锁定 handlers modules   两个模块的锁定
 %windir%\system32\inetsrv\appcmd unlock config -section:system.webServer/handlers
 %windir%\system32\inetsrv\appcmd unlock config -section:system.webServer/modules  
2：注册iis
 C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -i

 3：webconfig   <system.webServer>  节点 添加
    <!--以下配置为了让IIS7+支持Put/Delete方法-->
    <httpProtocol>
        <customHeaders>
            <add name="Access-Control-Allow-Origin" value="*" />
            <add name="Access-Control-Allow-Methods" value="GET,PUT,POST,DELETE,OPTIONS" />
            <add name="Access-Control-Allow-Headers" value="Content-Type" />
        </customHeaders>
    </httpProtocol>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true">
        <remove name="WebDAVModule" />
    </modules>

4：增加映射模块引入isapi处理模块  <system.webServer>下<handlers>节点添加

            <add name="all" path="*" verb="*" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness32" />
            <add name="html" path=".html" verb="*" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" preCondition="classicMode,runtimeVersionv4.0,bitness32" />

注意：如果如上步骤还不行，删除第三步中的

  <modules runAllManagedModulesForAllRequests="true">
        <remove name="WebDAVModule" />
    </modules>