将List对象和int传递给Web API [英] Passing List object and int to web api

问题描述

我有一个Web api核心项目，如果我只发送list参数，而不是API接收值，但是如果我发送控制器正在寻找的两个参数，则两个参数都将视为空

I have a web api core project that if I send just the list parameter than the API receives the values, however if I send both parameters that the controller is looking for then both parameters are seen as null

我的控制器:

[HttpPost]
[Route("/jobApi/RunBD")]
public int RunBDReport([FromBody]int month, [FromBody] IEnumerable<ClientModel> clients)
{
    billingDetailCycle objBillDetail = new billingDetailCycle();
    if (ModelState.IsValid)
    {
       return objBillDetail.Run(clients.ToList(), month);
    }
    else
    {
        return 500;
    }
}

ClientModel:

ClientModel:

public class ClientModel
{
    public string BlockOfBus { get; set; }
    public string ClientId { get; set; }
    public string Location { get; set; }
    public string SuppressSsn { get; set; }
}

我发送的请求:

{"month":7,
"ClientModel":[{"blockOfBus":"XXX",
"clientId":"123456",
"location":"",
"suppressSsn":"N"}]}

这会使控制器将两个参数都视为null，但是如果我这样发送请求:

This causes both parameters to be seen as null by the controller, however if I send my request like this:

[{"blockOfBus":"XXX",
"clientId":"123456",
"location":"",
"suppressSsn":"N"}]

然后，控制器能够看到我正在发送的列表对象(但是由于模型无效，它显然会返回500)

Then the controller is able to see the list object I am sending (however it obviously returns 500 as the model is not valid)

推荐答案

[FromBody] 只能使用一次，因为请求正文只能被读取一次.

[FromBody] can only be used once since the request body can only be read once.

对于每种操作方法，请勿将 [FromBody] 应用于多个参数.输入格式化程序读取请求流后，将不再可以再次读取该流以绑定其他 [FromBody] 参数.

Don't apply [FromBody] to more than one parameter per action method. Once the request stream is read by an input formatter, it's no longer available to be read again for binding other [FromBody] parameters.

参考 ASP.NET Core中的模型绑定

创建一个与预期数据匹配的模型.

Create a single model that matches the expected data.

public class DbReport {
    public int month { get; set; }
    public ClientModel[] ClientModel { get; set; }
}

并相应地更新操作

[HttpPost]
[Route("/jobApi/RunBD")]
public int RunBDReport([FromBody]DbReport report) {
    billingDetailCycle objBillDetail = new billingDetailCycle();
    if (ModelState.IsValid) {
       return objBillDetail.Run(report.ClientModel.ToList(), report.month);
    } else {
        return 500;
    }
}

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