C# 从 Html.DropdownListFor....MVC3 获取文本
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Get the text from Html.DropdownListFor....MVC3
提问by BoundForGlory
I have a model:
我有一个模型：
public class DocumentModel
{
public int TypeID { get; set; }
public List<SelectListItem> DocumentTypes { get; set; }
}
I have a view:
我有一个观点：
@Html.DropDownListFor(x => x.TypeID, Model.DocumentTypes, "- please select -")
I populate my drop down
我填充我的下拉菜单
var model = new DocumentModel();
model.DocumentTypes = GetDocumentTypes();
private static List<SelectListItem> GetDocumentTypes()
{
var items = new List<SelectListItem>
{
new SelectListItem
{Text = @"Text #1", Value = "1"},
new SelectListItem
{Text = @"Text #2", Value = "2"},
};
return items;
}
I have a controller action when the form is posted back:
当表单回发时，我有一个控制器操作：
[HttpPost]
public void UploadDocument(DocumentModel model)
{
if (ModelState.IsValid)
{
// I want to get the text from the dropdown
}
}
How do i get the text from my drop down list? Thanks
如何从下拉列表中获取文本？谢谢
采纳答案by Shyju
You may not get this easily with the default model binding. You have to a small workaround like this.
使用默认模型绑定可能无法轻松实现这一点。你必须像这样一个小的解决方法。
1)Add a new property to your model/viewmodel to store the selected text
1）向您的模型/视图模型添加一个新属性以存储所选文本
public class DocumentModel
{
public int TypeID { get; set; }
public List<SelectListItem> DocumentTypes { get; set; }
public string SelctedType { set;get;}
}
2)Use Html.HiddenForHelper method to create a hidden variable in the form for this property
2）使用Html.HiddenForHelper方法为这个属性在表单中创建一个隐藏变量
@Html.HiddenFor(x => x.SelctedType)
3)Use little javascript to override the submit ! ie; When user submits the form, Get the selected Text from the dropdown and set that value as the value of the Hidden field.
3）使用小javascript覆盖提交！IE; 当用户提交表单时，从下拉列表中获取选定的文本并将该值设置为隐藏字段的值。
$(function () {
$("form").submit(function(){
var selTypeText= $("#TypeID option:selected").text();
$("#SelctedType").val(selTypeText);
});
});
Now in your HTTPPostaction method, This will be available in the SelectedTypeproperty.
现在在您的HTTPPost操作方法中，这将在SelectedType属性中可用。
[HttpPost]
public void UploadDocument(DocumentModel model)
{
if(ModelState.IsValid)
{
string thatValue=model.SelectedType;
}
}
回答by Behnam Esmaili
if what you want to do is to retrieve selected item then this can do the work :
如果您想要做的是检索所选项目，那么这可以完成以下工作：
var selecteItem = model.DocumentTypes.Where(item=>item.Selected).FirstOrDefault();
Cheers!
干杯!
回答by Ctrl_Alt_Defeat
On your model I would have another string -
在你的模型上，我会有另一个字符串 -
public string Selected{ get; set; }
then in your view :
那么在你看来：
@Html.DropDownListFor(model => model.Selected, new SelectList(Model.DocumentTypes, "Value", "Text"))
回答by SimonJohnson
I stumbled here trying to find the way to get the text value out of a SelectList to display it in a format other than a DropDownList (I'm reusing my Edit ViewModel as it has all the data I required)
我在这里偶然发现了从 SelectList 中获取文本值的方法，以便以 DropDownList 以外的格式显示它（我正在重用我的 Edit ViewModel，因为它具有我需要的所有数据）
var text = selectList.Where(q => q.Selected == true).First().Text;
