使用ViewBag的ASP.NET MVC下拉列表 [英] Asp.net mvc dropdown list using ViewBag
问题描述
我在db中的表具有字段:Id，Organisation，Info.
My table in db have fields : Id,Organisation,Info.
我想要像这样放置dropdowm列表:
I want make dropdowm list like that:
<select>
<option value='Id there'>'Organisation there'</option>...
我正在尝试使用ViewBag来做到这一点:
I'm try to do it, using ViewBag:
ViewBag.Organisations = db.Organisations.ToList(); // get all fields from table using dbContext
并在视图中:
@Html.DropDownList('I don`t know what i shoud write here, please help')
我如何建立下拉列表?
How i can build dropdown list?
推荐答案
您需要创建一个构造函数可用，并且在视图中只需将其DropDownList方法作为参数传递即可.
You would need to create a SelectList in controller action using one of the constructors available and in view just pass it DropDownList method as parameter.
在Controller中执行以下操作:
In Controller do this:
ViewBag.Organisations = new SelectList(db.Organisations.ToList(),"Id","Organisation");
在SelectList中的
中，我们需要在最后两个参数中指定的option标记中指定哪个属性用作value和哪个属性用作text.
in SelectList we need to specify which property to use as value and which to use as text in the option tag which we are specifying in last two parameters.
，然后在View中，您需要以这种方式使用它:
and then in View you would need to use it this way:
@Html.DropDownList("Organization",ViewBag.Organisations as SelectList)
第一个参数将用作select元素的名称，第二个参数将用于填充select
Here first parameter would be used as name of select element and second one will be used to populate the option elements in the select
以下是Html.DropDownList可用的重载列表:
Following is the list of overloads available for Html.DropDownList :
