图片分离优化

Tools/MyUtils/SegPicture.cs

@@ -314,13 +314,19 @@ namespace Tools.MyUtils
             var url = $"{this.BaseUrl}/PrepareUpload.aspx";
             using (var web = new WebClient())
             {
-                web.Proxy = null;
-                web.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
-                var sb = new StringBuilder();
-                sb.Append("md5=").Append(this.Md5);
-                var bytes = web.UploadData(url, "POST", Encoding.UTF8.GetBytes(sb.ToString()));
-                var content = Encoding.UTF8.GetString(bytes);
-                return content == "1";
+                try
+                {
+                    web.Proxy = null;
+                    web.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
+                    var sb = new StringBuilder();
+                    sb.Append("md5=").Append(this.Md5);
+                    var bytes = web.UploadData(url, "POST", Encoding.UTF8.GetBytes(sb.ToString()));
+                    var content = Encoding.UTF8.GetString(bytes);
+                    return content == "1";
+                }
+                catch (Exception) { /*未请求到主机*/ }
+
+                return false;
             }
         }
         /// <summary>