检索MVC GET方法里面模特属性值 [英] retrieve model properties values inside GET method in mvc

问题描述

我有以下 GET 的方法，这是一个code到创建表单

I have following GET method , that's a code to a create form

 public ActionResult Add_Product(string Product_ID)
 { 
        AddNewProduct sample = new AddNewProduct();

        return View(sample);
 }

这是该模型类

public class AddNewProduct
{
    public string Product_ID { get; set; }

    ...
}

这是创建表单

    @model project_name.Models.AddNewProduct    

    <h4>Add New Product</h4>    

    @using (Html.BeginForm()) 
    {
        @Html.AntiForgeryToken()

        <div class="form-horizontal">                
            @Html.ValidationSummary(true, "", new { @class = "text-danger" }) <div class="form-group">
                @Html.LabelFor(model => model.Product_ID, htmlAttributes: new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                    @Html.TextBoxFor(model => model.Product_ID, new { @class = "form-control" })
                    @Html.ValidationMessageFor(model => model.Product_ID, "", new { @class = "text-danger" })
               </div>
         </div>

         .....

<div>
    @Html.ActionLink("Back to AddNewProduct", "AddNewProduct","Home" , new {Product_ID = Model.Product_ID})
</div>

    }

我可以用这个视图页面。但是当我点击这个返回AddNewProduct 链接和调试 AddNewProduct 我看不到任何价值字符串的product_id

I can Insert a Product_ID using this view page .But Once I click this Back to AddNewProduct link and debug AddNewProduct I cannot see any value for string Product_ID

为什么这个模特属性没有很好地结合

Why this model properties not bind well

推荐答案

要通过文本框的值 Add_Product（） GET方法，则需要使用JavaScript / jQuery的。更换你 @ Html.ActionLink（..）与

To pass the value of the textbox to the Add_Product() GET method, you need to use javascript/jquery. Replace you @Html.ActionLink(..) with

<a href="#" class="back">Back to AddNewProduct</a>

和添加下面的脚本

var baseUrl = '@Url.Action("Add_Product", "Home")';
$('#back').click(function() {
    var id = $('#Product_ID').val();
    location.href = baseUrl + '/' + id;
}}

请注意： location.href = +的baseUrl'/'+ ID; 假定您的已定义的特定路由与 {控制器} / {行动} / {PRODUCT_ID} ，否则它需要

Note: location.href = baseUrl + '/' + id; assumes your have defined a specific route with {controller}/{action}/{Product_ID}, otherwise it needs to be

location.href = baseUrl + '?Product_ID=' + id;

另外，改变方法参数，以字符串ID 所以它使用默认路由

还要注意的是，你可能会想方法更改为

Note also that you will probably want to change the method to

public ActionResult Add_Product(string Product_ID)
{ 
    AddNewProduct sample = new AddNewProduct
    {
        Product_ID = Product_ID
    };
    return View(sample);
}

因此​​，如果您单击返回AddNewProduct 链接，视图将显示输入previous值。

so that if you click the Back to AddNewProduct link, the view will display the previous value you entered.

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