Response.Filter 为 Null的解决方法-详细内容

文章内容

2017/10/3 15:56:42,作者: 黄兵

Response.Filter 为 Null的解决方法

最近在写代码的时候，提示Response.Filter为null，如图所示：

代码如下内容：

#region OnResultExecuted
/// <summary>
/// 返回结果集之后执行的方法
/// </summary>
/// <param name="filterContext"></param>
public override void OnResultExecuted(ResultExecutedContext filterContext)
{
    if (filterContext.HttpContext.Request.IsAjaxRequest())
    {
        return;
    }

    if (filterContext.Exception != null)
    {
        return;
    }

    if (isEnableCompression)
    {
        HttpRequestBase request = filterContext.HttpContext.Request;
        HttpResponseBase response = filterContext.HttpContext.Response;
        string acceptEncoding = request.Headers["Accept-Encoding"];

        if (acceptEncoding == null)
        {
            return;
        }

        if (acceptEncoding.ToLower().Contains("gzip"))
        {
            response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
            response.AppendHeader("Content-Encoding", "gzip");
        }
        else if (acceptEncoding.ToLower().Contains("deflate"))
        {
            response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
            response.AppendHeader("Content-Encoding", "deflate");
        }
    }
}
#endregion

解决办法：

修改如下内容：

如果是子控制器直接返回

if (filterContext.IsChildAction) return;

public class CompressAttribute : ActionFilterAttribute
{    
   public override void OnActionExecuting(ActionExecutingContext filterContext)
   {
       if (filterContext.IsChildAction) return;

       ...
    }
}