复杂类型在 ApiController 参数中变空 [英] Complex type is getting null in a ApiController parameter

问题描述

我不知道为什么我的参数ParametroFiltro Filtro"变空了，其他参数page"和pageSize"变好了.

I don´t know why my parameter "ParametroFiltro Filtro" is getting null, the other parameters "page" and "pageSize" is getting OK.

public class ParametroFiltro
{
    public string Codigo { get; set; }
    public string Descricao { get; set; }
}

我的 ApiController Get 方法:

My ApiController Get method:

public PagedDataModel<ParametroDTO> Get(ParametroFiltro Filtro, int page, int pageSize)

我的ajax调用:

var fullUrl = "/api/" + self.Api;
$.ajax({
    url: fullUrl,
    type: 'GET',
    dataType: 'json',
    data: { Filtro: { Codigo: '_1', Descricao: 'TESTE' }, page: 1, pageSize: 10 },
    success: function (result) {
        alert(result.Data.length);
        self.Parametros(result.Data);
    }
});

推荐答案

您正在尝试使用 GET 方法发送复杂对象.失败的原因是 GET 方法不能有主体，并且所有值都被编码到 URL 中.您可以使用 [FromUri] 来完成这项工作，但首先您需要更改您的客户端代码:

You are trying to send a complex object with GET method. The reason this is failing is that GET method can't have a body and all the values are being encoded into the URL. You can make this work by using [FromUri], but first you need to change your client side code:

$.ajax({
    url: fullUrl,
    type: 'GET',
    dataType: 'json',
    data: { Codigo: '_1', Descricao: 'TESTE', page: 1, pageSize: 10 },
    success: function (result) {
        alert(result.Data.length);
        self.Parametros(result.Data);
    }
});

这样[FromUri] 将能够直接从 URL 中获取复杂的对象属性，如果您像这样更改操作方法:

This way [FromUri] will be able to pick up your complex object properties directly from the URL if you change your action method like this:

public PagedDataModel<ParametroDTO> Get([FromUri]ParametroFiltro Filtro, int page, int pageSize)

您之前的方法宁愿使用可以有正文的 POST 方法(但您仍然需要使用 JSON.stringify() 将正文格式化为 JSON).

Your previous approach would rather work with POST method which can have a body (but you would still need to use JSON.stringify() to format body as JSON).

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