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      1. 在 ASP.NET MVC Core 中使用枚举作为下拉列表

        时间:2023-07-11
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                1. 本文介绍了在 ASP.NET MVC Core 中使用枚举作为下拉列表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我正在尝试使用 Razor 视图中的标签助手在 ASP.NET MVC Core 中创建一个带有枚举属性的下拉列表:

                  I'm trying to create a dropdown list with an enum property in ASP.NET MVC Core using the tag helper in a Razor view:

                  这是模型:

                  public class PersonalMember : Member
                  {
                      [Required, Display(Name = "First Name")]
                      public string FirstName { get; set; }
                  
                      [Required, Display(Name = "Last Name")]
                      public string LastName { get; set; }
                  
                      [EnumDataType(typeof(Gender))]
                      public Gender GenderType { get; set; }
                  }
                  
                  public enum Gender
                  {
                      Male = 1,
                      Female = 2
                  }
                  

                  这是视图中的一个表单的一部分:

                  Here is part of a form in the view:

                  <div class="form-group">
                      <label asp-for="GenderType" class="col-md-2 control-label"></label>
                      <div class="col-md-10">
                          <select asp-for="GenderType" asp-items="Html.GetEnumSelectList<GenderType>()">
                              <option selected="selected" value="">Please select</option>
                          </select>
                          <span asp-validation-for="GenderType" class="text-danger" />
                      </div>
                  </div>
                  

                  我遇到的问题是在 Html.GetEnumSelectList 之后,GenderType 无法识别并显示为错误.

                  The problem I'm having is that after Html.GetEnumSelectList, GenderType is not recognized and shows up as an error.

                  有人知道怎么解决吗?

                  推荐答案

                  我想你不小心使用了 GenderType 而不是 Gender.正确的语法是

                  I think you accidentally used GenderType instead of Gender. The correct syntax is

                  <select asp-for="GenderType" asp-items="Html.GetEnumSelectList<Gender>()">
                      <option selected="selected" value="">Please select</option>
                  </select>
                  

                  这篇关于在 ASP.NET MVC Core 中使用枚举作为下拉列表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跟版网!

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