Question

在服务器端Blazor Web应用程序中从客户端发布到服务器时出现问题。

我已经在共享库中创建了两个简单的类：

public class CommandRequest
{
    public int RequestNumber { get; set; }
}

public class CommandResponse
{
    public int ResponseNumber { get; set; }
}

我的客户端代码：

@if (response == null)
{
    <p>Loading...</p>
}
else
{
    <p>@response.ResponseNumber</p>
}

@functions {
    CommandResponse response;

    protected override async Task OnInitAsync()
    {
        var request = new CommandRequest() {RequestNumber = 3};
        response = await Http.SendJsonAsync<CommandResponse>(HttpMethod.Post,"api/SampleData/ProcessRequest", request);
    }
}

我的服务器端请求处理程序：

    [HttpPost("[action]")]
    public CommandResponse ProcessRequest(CommandRequest request)
    {
        return new CommandResponse() { ResponseNumber = request.RequestNumber * 2 };
    }

调试此方法时，ProcessRequest方法始终传递一个空对象，request.RequestNumber为0。我是ASP.NET和Blazor的新手，我在做什么错了？

Answer 1

在CommandRequest参数中添加[FromBody]属性解决了我的问题：

    [HttpPost("[action]")]
    public CommandResponse ProcessRequest([FromBody] CommandRequest request)
    {
        return new CommandResponse() { ResponseNumber = request.RequestNumber * 2 };
    }

此处参考： What is the function of [FromBody] Attribute in C#?

Blazor Post and Response C＃

1 个答案: