【.NET】asp.net Redirect 图片路径

#需求：

　　前端通过<img>的src向服务端请求图片信息，如果不存在想要的图片，那么就返回一张默认路径下的图片；

#实现：

1 <img class="related_resources" src="PictureHandle.ashx?id=42&type=thumbnail">

 1 public void ProcessRequest (HttpContext context) {
 2 　　string type = context.Request.QueryString["type"] != null ? context.Request.QueryString["type"].ToString() : "";
 3 　　string url = ConfigurationManager.AppSettings["RestUrl"] + "Resource";
 4 　　if (type == "thumbnail")
 5 　　{
 6             context.Response.ContentType = "text/plain";
 7             url = url + "/thumbnail?ID=" + id;
 8             try
 9             {
10                 bytes = new WebClient().DownloadData(url);
11                 context.Response.BinaryWrite(bytes);
12             }
13             catch(Exception)
14             {
15                  context.Response.Redirect("image/default.jpg");
16   
17             }
18     }
19 }

转载于:https://www.cnblogs.com/willingtolove/p/9604587.html