Question

我刚刚开始使用Web Api，在完成一些教程和小型测试项目之后，我有足够的信心建立一个真实的世界＆＃34;应用。

在我第一次创建解决方案时，我删除了我认为不必要的所有内容。在这个练习中，我必须删除一些绑定器，因为当我POST / PUT一个复杂的对象时，它总是为空。

简而言之，我的问题是在web api中，什么是默认的模型绑定器？我在哪里引用它们？下面我已经介绍了我想要做的以及我尝试解决此问题的内容更详细。

我想做什么 我有两个解决方案在运行，在每个解决方案中我都有相同的类。我试图将一个复杂的对象从解决方案A传递到解决方案B.当我点击解决方案B中的断点时，传递的值始终为空（解决方案B是我的＆＃34;现实世界＆＃34;项目有问题）。

我尝试了什么 在阅读了几个stackoverflow线程和how web api does binding之后，我尝试在同一个解决方案中调用一个动作并传递相同的对象，IT工作了！例如

将对象从solutionA.method1传递给solutionA.controller1.action1 WORKS
将对象从solutionB.method1传递给solutionB.controller1.action1 FAILS（500 - 内部服务器错误）

我已经比较了解决方案，试图找出可能导致此问题的我已删除的内容，但没有任何成功。我可以创建一个新的解决方案来解决问题，但我不觉得我会从这条路线中学到任何东西。如果有人能指出我正确的方向，我会非常感激，所以我可以解决这个问题并学习更多关于web api的文章。

可在同一解决方案中运行的代码

解决方案A

public const string uri = "http://localhost:49611/api/Values";

public async Task<string> PutAValue()
{
    var propertyForm = new AddUpdatePropertyForm();
    var network = new Network { NetworkID = 123456 };
    var branch = new Branch { BranchID = 1, Channel = Channel.Sales, Overseas = false };
    var property = new Property { AgentRef = "123", Published = true, PropertyType = PropertyType.SemiDetachedBungalow, Status = TransactionStatus.Available };
    propertyForm.Network = network;
    propertyForm.Branch = branch;
    propertyForm.Property = property;

    using (HttpClient httpClient = new HttpClient())
    {
        httpClient.DefaultRequestHeaders.Accept.Clear();
        httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        var responce = await httpClient.PutAsJsonAsync<AddUpdatePropertyForm>(uri, propertyForm);

        ...more stuff...
    }
}

解决方案A

public void Put([FromBody]AddUpdatePropertyForm form)
{
    ...Has all passed values but IN THE SAME SOLUTION...
}

使用解决方案a和解决方案b无效的代码

解决方案A

public const string uri = "http://localhost:58814/api/sample";

public async Task<string> PutAValue()
{
    var propertyForm = new AddUpdatePropertyForm();
    var network = new Network { NetworkID = 123456 };
    var branch = new Branch { BranchID = 1, Channel = Channel.Sales, Overseas = false };
    var property = new Property { AgentRef = "123", Published = true, PropertyType = PropertyType.SemiDetachedBungalow, Status = TransactionStatus.Available };
    propertyForm.Network = network;
    propertyForm.Branch = branch;
    propertyForm.Property = property;

    using (HttpClient httpClient = new HttpClient())
    {
        httpClient.DefaultRequestHeaders.Accept.Clear();
        httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        var responce = await httpClient.PutAsJsonAsync<AddUpdatePropertyForm>(uri, propertyForm);

        ...more stuff...
    }
}

解决方案B

public async Task<HttpResponseMessage> Put([FromBody]AddUpdatePropertyForm propertyForm)
{
    ...propertyForm ALWAYS null...
}

使用解决方案a和解决方案b的代码（但我想接收对象而不是字符串 - 正如我在同一解决方案中传递它时能够做的那样）

解决方案A

public const string uri = "http://localhost:58814/api/sample";

public async Task<string> PutAValue()
{
    var propertyForm = new AddUpdatePropertyForm();
    var network = new Network { NetworkID = 123456 };
    var branch = new Branch { BranchID = 1, Channel = Channel.Sales, Overseas = false };
    var property = new Property { AgentRef = "123", Published = true, PropertyType = PropertyType.SemiDetachedBungalow, Status = TransactionStatus.Available };
    propertyForm.Network = network;
    propertyForm.Branch = branch;
    propertyForm.Property = property;

    using (HttpClient httpClient = new HttpClient())
    {
        httpClient.DefaultRequestHeaders.Accept.Clear();
        httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

        var content = new JavaScriptSerializer().Serialize(propertyForm);
        var response = await httpClient.PutAsJsonAsync<string>(uri, content);

        ...more stuff...
    }
}

解决方案B

public async Task<HttpResponseMessage> Put([FromBody]string propertyForm)
{
    var content = new JavaScriptSerializer().Deserialize<AddUpdatePropertyForm>(propertyForm);
}

Web Api什么是默认的模型绑定器以及我在哪里引用它们

0 个答案: