如何在mvc 3.0中绑定dropdownlist [英] How to bind dropdownlist in mvc 3.0

问题描述

亲爱的先生，

我是mvc的新手，我想在MVC 3.0中绑定dropdownlist。我的代码如下：



table



tbl_Modules

Module_Id ，ModuleName，ModuleDescription



tbl_DocumentTypes

Document_Id，DocumentName，DocumentDescription， Module_Id



现在我想要在表单中添加文档类型并在表单中我想要一个下载列表，其中Module_Id为值，ModuleName为文本。

Dear Sir,
I am new in mvc and i want to bind dropdownlist in MVC 3.0. My Code is given below

tables

tbl_Modules
Module_Id,ModuleName,ModuleDescription

tbl_DocumentTypes
Document_Id,DocumentName,DocumentDescription,Module_Id

now i want to craete form to add document type and in form i want a dropdownlist with Module_Id as value,ModuleName as text.

public class DocumetRepository
    {

        InwardManagementEntities db = new InwardManagementEntities();
       
        public IQueryable<tbl_DocumentTypes> FindAllDocumentTypes()
        {
            return db.tbl_DocumentTypes;
        }
       
    }


public class DocumentTypeViewModel
    {
         ModuleRepository _modulerepository = new ModuleRepository();
        public tbl_DocumentTypes Document { get; private set; }
        public SelectList Modules { get; private set; }

        public DocumentTypeViewModel(tbl_DocumentTypes document)
        {
            Document = document;
            //var _modules = _modulerepository.FindAllModules().Select(d => new  {Module_Id= SqlFunctions.StringConvert((double?)d.Module_Id), Text = d.ModuleName });
             var _modules = _modulerepository.FindAllModules().Select(d => new SelectListItem() {Value= SqlFunctions.StringConvert((double?)d.Module_Id), Text = d.ModuleName });
             Modules = new SelectList(_modules, Document.Module_Id);
        }
    }

和conroller

And in conroller

public ActionResult AddDocument()
       {
           tbl_DocumentTypes _document = new tbl_DocumentTypes();

           return View(new DocumentTypeViewModel(_document));
       }

并且在视图中

and in view

<div class="editor-label">
           Module
        </div>
        <div class="editor-field">
            @Html.DropDownList("Document.Module_Id", Model.Modules.ToList())
            @Html.ValidationMessageFor(model => model.Document.Module_Id)
        </div>

但是在下拉列表中我得到System.Web.Mvc.SelectListItem 。请帮助我

but in dropdownlist i get System.Web.Mvc.SelectListItem . Please help me

推荐答案

Maneesh你正在使用@ Html.DropDownList而不是@Html.DropDownListFor帮助器。看看这篇文章



mvc 3中的绑定下拉列表 [ ^ ]

Maneesh you are using @Html.DropDownList instead of @Html.DropDownListFor helper. Look into this article

Binding drop down list in mvc 3[^]

请阅读下面提到的关于如何使用dropdwonlist绑定viewmodel的文章。



示例代码：

Please read below mentioned article which I have written about how to bind viewmodel with dropdwonlist.

sample code :

@Html.DropDownListFor(m => m.SelectedValue,new SelectList(Model.ProductCategories, "Id","CategoryName"),"-Please select a category -")

如何在ASP.NET MVC中使用ViewModel？

这篇关于如何在mvc 3.0中绑定dropdownlist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！