win server2019 IIS10设置上传大小限制的方法实现

<configuration>
    <system.web>
      <compilation debug="true" targetFramework="4.5.2" />
 <!--最大请求长度,单位为KB(千字节),默认为4M,设置为1G,上限为2G -->
      <httpRuntime maxRequestLength="40960" targetFramework="4.5.2" />
    </system.web>
  <appSettings>
    <add key="FileType" value=".doc,.xls,.txt,.rar" />
    <add key="PicTureTye" value=".jpg|.gif|.png|.bmp|.psd|.svg|" />
    <add key="FileSizeLimit" value="10240" />
  </appSettings>
    <location path="" overrideMode="Deny">
    </location>
    <system.webServer>
        <security>
            <requestFiltering>
  <!--允许上传文件长度,单位字节（B）,默认为30M,最大为2G -->
                <requestLimits maxAllowedContentLength="300000000" />
            </requestFiltering>
        </security>
    </system.webServer>
</configuration>