使用post方法将多个参数发送到asp.net core 3 mvc操作 [英] send multiple parameters to asp.net core 3 mvc action using post method

问题描述

使用http post方法将具有多个参数的ajax请求发送到asp.net mvc core 3操作时出现问题.参数不绑定.在点网框架ASP.NET Web API中有类似的限制，但在ASP.NET MVC操作中没有. 我想知道在asp.net core 3 mvc中是否有解决方法，还是这是新的限制? 动作:

There is problem in sending ajax requests that have multiple parameters to asp.net mvc core 3 action using http post method. the parameters do not bind. In dot net framework asp.net web api there was similar limitation but not in asp.net mvc actions. I want to know is there work around this in asp.net core 3 mvc or is this the new limitation? action:

public string SomeAction([FromBody]string param1, [FromBody]IEnumerable<SomeType> param2, [FromBody]IEnumerable<SomeType> param3)
{
       //param1 and param2 and param3 are null
}

客户端:

    $.ajax({
        contentType: 'application/json',
        data: JSON.stringify({
            "param1": "someString",
            "param2": someList,
            "param3": someList
        }),
        type: "POST",
        dataType: "json",
        url: "/SomeController/SomeAction",
        success: function (result) {
        },
        error: function (error) {
            console.error(error);
        }
    }
    );

推荐答案

使用新版本时，需要明确说明预期绑定模型的对象和位置.

With the new version actions need to be explicit about what and where they expected to bind models from.

创建一种模式以保存所有必需的数据

Create a mode to hold all the required data

public class SomeActionModel {
    public string param1 { get; set; }
    public IEnumerable<SomeType> param2 { get; set; }
    public IEnumerable<SomeType> param3 { get; set; }
}

更新操作以期望来自请求正文的数据

Update the action to expect the data from the body of the request

public IActionResult SomeAction([FromBody] SomeActionModel model) {
    if(ModelState.IsValid) {
        string param1 = model.param1;
        IEnumerable<SomeType> param2 = model.param2;
        IEnumerable<SomeType> param3 = model.param3;

        //...

        return Ok();
    }

    return BadRequest(ModelState);
}

客户端还应该以正确的格式发送数据

The client should also send the data in the correct format

var model = {
    param1: GeometricNetworkTrace_Class.flags,
    param2: GeometricNetworkTrace_Class.barriers,
    param3: feederIds
};

$.ajax({
    contentType: 'application/json',
    data: JSON.stringify(model),
    type: "POST",
    dataType: "json",
    url: "/controllerName/actionName",
    success: function (result) {
    },
    error: function (error) {
        console.error(error);
    }
});

参考 ASP.NET Core中的模型绑定

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