SignalR 与外部模型挂起 class

Question

我有一个非常简单的 SignalR 集线器，每当我尝试将我的模型 classes 移动到 class 库时，我注意到集线器上挂起。每当我将模型 classes 留在 ASP.net 项目中时，它工作正常并从服务器检索对象但是一旦我将模型 class 移动到 class 库（对于跨项目重用）来自客户端（js 端）的 SignalR 调用挂起。我可以看到请求通过设置断点到达集线器，但之后它不会在客户端 return .. 这里有什么线索吗？

我在客户端启用了日志记录：

[16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: Client subscribed to hub 'myHubhub'.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: Negotiating with '/signalr/negotiate?clientProtocol=1.5&connectionData=%5B%7B%22name%22%3A%22myHubhub%22%7D%5D'.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: serverSentEvents transport starting.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: Attempting to connect to SSE endpoint 'http://localhost:1275/signalr/connect?transport=serverSentEvents&clientProt…VWFxHpWoC0T&connectionData=%5B%7B%22name%22%3A%22myHubhub%22%7D%5D&tid=6'.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: EventSource connected.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: serverSentEvents transport connected. Initiating start request.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: The start request succeeded. Transitioning to the connected state.
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: Now monitoring keep alive with a warning timeout of 13333.333333333332, keep alive timeout of 20000 and disconnecting timeout of 30000
jquery.signalR.min-2.2.0.js:8 [16:37:39 GMT+0200 (W. Europe Daylight Time)] SignalR: Invoking myHubhub.RetrieveMyObjects

服务器端集线器方法：

public IEnumerable<MyModel> RetrieveMyObjects()
{
    using (DatabaseContext dbContext = new DatabaseContext())
    {
        Debug.WriteLine("RetrieveMyObjects()");
        List<MyModel> objs = dbContext.MyObjects.ToList();
        return objs;
    }
}

客户端调用：

@section scripts
{        
    <script>       
        $(function () {           
            // Reference the auto-generated proxy for the hub.
            var chat = $.connection.myHub;
            // Create a function that the hub can call back to display messages.
            chat.client.addNewMessageToPage = function (name, message) {
                // Add the message to the page.
                $('#discussion').append('<li><strong>' + htmlEncode(name)
                    + '</strong>: ' + htmlEncode(message) + '</li>');
            };
            $.connection.hub.logging = true;
            // Start the connection.
            $.connection.hub.start().done(function () {

                // Call the Send method on the hub.
                chat.server.retrieveMyObjects().done(function (result) {
                    console.log("yep");
                    //Process logic
                }).fail(function (err) {
                    console.log('Could not Connect! ' + err);
                });
            });
        });

    </script>
}

Answer 1

嗯，我开始拆解我的模型并找到了答案。我有一个标有“[JsonConverter(typeof(StringEnumConverter))]”的枚举属性，用于将枚举序列化为字符串值。每当模型在外部 class 库中时，这显然会破坏一些东西？

编辑： 问题：外部 class lib 引用了 Netwonsoft.Json 7.0.0 而我的 ASP.NET 项目引用了版本 6.0.4.. 一旦我在 [=19] 上将 Netwonsoft.Json 降级到 6.0.4 =] lib 一切都按预期工作。

SignalR 与外部模型挂起 class

SignalR hang with external model class

c#

asp.net

model

signalr