.net 上传文件大小限制

 <system.web>
    <compilation debug="true" targetFramework="4.5.2" />
    <httpRuntime maxRequestLength="2097151" executionTimeout="3600" useFullyQualifiedRedirectUrl="true" />
  </system.web>

<system.webServer>
    <security>
      <requestFiltering>
        <!--单位为字节 maxAllowedContentLength-->
        <requestLimits maxAllowedContentLength="2097151000"/>
      </requestFiltering>
    </security>
</system.webServer>