如何将ASP-for TagHelper与反射结合使用 [英] How to use asp-for TagHelper combined with Reflection

问题描述

我有一个 Foo 类，其中包含很多属性，我想将所有这些属性迭代为一种形式.该网站是使用ASP.NET Core 2.2和Razor构建的.

I have a class Foo which contains a lot of properties, I'd like to iterate through all of them into a form. The website is built using ASP.NET Core 2.2 and Razor.

如何使用反射功能为TagHelper的asp生成一个MemberExpression?我已经在论坛上阅读了几篇关于此的文章，但没有一个答案符合我的需求.

How can I build a MemberExpression that asp-for TagHelper seems to expect using Reflection? I've read a couple of post about this on the Forum but none of the answer fits my need.

以下代码段无效.

@model Foo;
<h1>Foo Reflective filling example</h1>

    @foreach(var property in typeof(Foo).GetProperties()) {
        <p>
            <div class="row">
                <div class="col-md-3">
                    <label asp-for="@property.Name"></label> @*doesn't work!'*@
                </div>
                <div class="col-md-3">
                    <input asp-for="@property.Name" class="form-control" id="property.Name"/>
                    <span asp-validation-for="@property.Name" class="text-danger"></span>
                </div>
            </div>
        </p>
    }

感谢您的帮助

推荐答案

InputTagHelper帮助我们以声明性编程风格编写代码.如果您发现难以通过反射动态渲染不同的字段，请随时以编程的方式使用 @ Html.Xyz 等效项.

The InputTagHelper helps us to write code in a style of declarative programming. When you find it difficult to render different fields dynamically by reflection, feel free to use the @Html.Xyz equivalent in a programmatic way.

您的代码可以如下重写:

Your code can be rewritten as below:

@foreach(var property in typeof(Foo).GetProperties()) {
    <p>
        <div class="row" >
            <div class="col-md-3">
                @Html.Label(@property.Name)
            </div>
            <div class="col-md-3">
                @Html.Editor(@property.Name,  new { htmlAttributes = new{ @class="form-control" } })
                @Html.ValidationMessage(@property.Name, new { htmlAttributes = new { @class="text-danger"} })
            </div>
        </div>
    </p>
}

演示:

我创建一个自定义的Foo DTO，如下所示:

Demo :

I create a custom Foo DTO as below :

public class Foo{
    public int Id {get;set;}
    public string Name {get;set;}
    public string Address {get;set;}
    public DateTime UpdatedAt{get;set;}
}

呈现的形式是:

这篇关于如何将ASP-for TagHelper与反射结合使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！