在dropdownlistfor MVC 4选择默认值 [英] Select a default value in dropdownlistfor MVC 4

问题描述

我试图与一个选定值dropdownlistfor，但它不工作：/我在网上搜索上，但我没有找到解决办法：/

I'm trying to make a dropdownlistfor with a selected value but it doesn't work :/ And I search on the web but I don't find the solution :/

有关的那一刻，我这样做是：

For the moment, I'm doing this :

在C＃中：

ViewBag.ID_VEH = new SelectList(db.VEHI, "ID_VEH", "COD_VEH", 4); // 4 is an example

在我CSHTML：

@Html.DropDownListFor(model => model.ID_VEH, ViewBag.ID_VEH as SelectList)

将DropDownList很好完成，但默认值未选择：？/你有一个想法，请

The dropdownlist is well complete but the default value is not selected :/ do you have an idea please ?

推荐答案

我喜欢做的就是添加的项目在DropDownList我的模型显示的列表，所以我没有通过通过该列表viewbag。
此外，我喜欢一个字段添加到我的模型包含的SelectedValue，我填写控制器

What I like to do is add a list of the items to display in the dropdownlist to my model, so I don't have to pass that list via a viewbag. Also i like to add a field to my model that contains the SelectedValue, that I fill in the controller

然后，你可以做

@Html.DropDownListFor(model => model.ID_VEH, new SelectList(Model.listVEH, "ID_VEH", "COD_VEH", Model.SelectedVEH_ID), "--Select VEH--")

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