在MVC中单击“提交”按钮后，如何保持下拉列表中的选定值？

Question

In my View I have this dropdownlist that returns data from database:

@Html.DropDownList("somevalue", (SelectList) ViewBag.DropList, "--Select Customer--", Model.Search.SomeValue)

But after I click search button:

<input class="first-search_btn" type="submit" value="Search"/>

Operation is executed, but value from dropdown list returns to first empty value "Select Customer". How can I keep selected value from dropdownlist after I click "Search".

Answer 1

Try to use use DropDownListFor like I did:

@Html.DropDownListFor(m => m.SubscriptionTypeId, new SelectList(ViewBag.SubscriptionTypes, "Key", "Value", Model.SubscriptionTypeId), new{ @class = "w100" })

where Model.SubscriptionTypeId is default selected value and

ViewBag.SubscriptionTypes = Enum.GetValues(typeof(SubscriptionTypeDefinition)).Cast<SubscriptionTypeDefinition>().ToDictionary(item => (int)item, item => item.ToLocalizedString());