POST Json到剃须刀页面 [英] POST Json to from razor pages

问题描述

.Net核心中的剃刀页面是我的新手，在了解AJAX Post情况下的工作原理时遇到了一些麻烦.

I'm new to razor pages in .Net core and I have some trouble to understand how it works in case of AJAX Post.

我创建了一个示例项目来解释我的问题

I have created a sample project to explain my problem

我有一个简单的表单，在名为Index.cshtml的文件中有三个输入:

I have one simple form with three input in a file called Index.cshtml:

<form method="post">
    firstname :
    <input id="firstname" type="text" name="firstname" />
    name:
    <input id="name" type="text" name="name" />
    message:
    <input id="message" type="text" name="message" />

    <input type="submit" value="Submit">
</form>

<script src="~/lib/jquery/dist/jquery.js"></script>
<script>
    $(document).ready(function(){
        $("form").submit(function () {
            var message = {
                firstname: $("#firstname").val(),
                name: $("#name").val(),
                message: $("#message").val()
            }

            $.ajax({
                url: "/Index",
                type: "POST",
                dataType: "json",
                contentType: "application/json; charset=utf-8",
                data: JSON.stringify(message),
                success: function () {
                    console.log("success")
                },
 
            });
        })
    });
</script>

我想将json对象(消息)发送到PageModel中的OnPost()函数:

I want to send my json object (message) to my OnPost() function in PageModel :

    public class IndexModel : PageModel
    {
        public void OnGet()
        {

        }

        public void OnPost(string json)
        {
            Console.WriteLine(json);
        }
    }

问题在于它为空，

我也尝试过:

data: { "json" : JSON.stringify(message) },

data: { "json" : JSON.stringify(message) },

但是在我的OnPost方法中，json始终为null.

But in my OnPost method, json is always null.

你能解释一下我的错误在哪里吗?

Can you explain me where is my mistake ?

谢谢

推荐答案

这是有关模型绑定的问题.当您将数据发布为Json时，接收到的数据是一个{"firstName":"Andrew","name":"Lock","message":"Hello"}之类的json对象.

This is an issue about Model Binding .When you post the data as Json ,the data received is a json object like {"firstName":"Andrew","name":"Lock","message":"Hello"}.

因此，您应该在处理程序中使用模型消息作为参数，以便在ASP.NET Core中正确绑定JSON，必须修改操作以在参数上包含属性[FromBody].

So you should use a model Message as the parameter in the handler ,in order to bind the JSON correctly in ASP.NET Core, you must modify your action to include the attribute [FromBody] on the parameter.

您可以查看模型绑定JSON ASP.NET Core中的POST .

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