html.dropdownlistfor

问题 Learning about dropdown lists, Im trying to add a RSVP create page for nerddinner as in Scott Gu's blog with a Html.DropDownListFor listing available dinners. I can get the dropdown list populated but I cannot get the dropdown to pre select the value ("Sample Dinner 2") I want. Im using an initilizer to seed a few dinner objects in the db. The database is sql ce 4 using a EF 'code first approach'. Sorry I know this is a v common problem and hate to ask, but honestly have spent quite some time

问题 I have the following class and want to filter the dropdown list based on a certain condition. Model Classes public class Option { public int OptionID { get; set;} public string OptionName { get; set; } public int TechnicalCharacteristicID { get; set; } public int LsystemID { get; set; } public virtual ICollection<OptionValue> OptionValues { get; set; } public virtual TechnicalCharacteristic TechnicalCharacteristic { get; set; } public virtual Lsystem Lsystem { get; set; } } public class

问题 I know there are multiple threads on how to get the selected value of a DropDownList. However I can't find the right way to get this value from a partial view in my controller. This is my partial view: @model List<aptest.Models.answer> @Html.DropDownList("dropdownlist", new SelectList(Model, "text", "text")) <button type="submit">next</button> 回答1: In order to get dropdown value, wrap your select list in a form tag. Use models and DropDownListFor helper Razor View @model MyModel @using (Html

问题 I am trying to populate some data from model to view in a dropdown list. For that I have created my model as Model: public class NoOfSupportingLanguages { public int LanguageId { get; set; } public string LanguageName { get; set; } } public class OrganisationModel { public SelectList NoofSupportingLanguages { get; set; } } And on the controller side , something like this: Controller: public ActionResult Index() { List<NoOfSupportingLanguages> LanguageOption = new List<NoOfSupportingLanguages>

问题 I have to filter the options of a dropdownlist by value selected from another dropdown. In my database I have a table with all countries and a table with all cities of the world with a FK to the respective country. Here is a part of my view and my page: And my controller methods (the GET method of the page, the loading of all countries and the loading of all cities of a country): (I removed the image) I have to handle the "onchange" event of the first dropdownlist to modify all the options of

问题 I would like to know how to make a text box change according to a drop down menu. So for example ... <form action="index.php" method="POST"> <p>Product:</p> <select id = "myPRODUCTS"> <option value = "Apple">Apple</option> <option value = "Orange">Orange</option> <option value = "Mango">Mango</option> </select> <p>Price:</p><input type="text" name="Price" readonly="readonly" /> So I want the price text box to change if I have selected Apple I want it to be £0.45 or if I select orange I want

问题 I am very new to jQuery, is there by any chance some code using jQuery that I can use to populate a drop-down list with in MVC? I am using MVC models to populate drop-down lists at the moment. How can I populate a drop-down list with jQuery to avoid posting back to the server? At the moment I am using json as follows: Controller: [AcceptVerbs(HttpVerbs.Post)] public JsonResult GetTeams(StatisticModel model) { StatisticModel newModel = new StatisticModel(model.leagueId); var teams = newModel

问题 I am using hardcoded string values for dropdownlist to the view , and passing the selected value from database , where 0 = pending , 1 = complete and 3 = awaiting, below is the code for view and controller: var paymentStatus = new[] { "Pending", "Complete", "AwaitingPayment" }; ViewData["StatusID"] = new SelectList(paymentStatus, "Value", "Text", booking.StatusID); <tr><td>Status</td><td><%: Html.DropDownListFor(m => m.StatusID, ViewData["StatusID"] as SelectList)%></td></tr> It comes up with

问题 I am validating a form using default MVC validation technique as follows: <div class="editor-label"> @Html.LabelFor(model => model.Company_Name) </div> <div class="editor-field"> @Html.EditorFor(model => model.Company_Name) @Html.ValidationMessageFor(model => model.Company_Name, "Company Name is required") </div> This is working fine for textboxes. When i applied the same for dropdown this is not working. <div class="editor-label"> @Html.LabelFor(model => model.State_Code, "State") </div>

问题 I'm working on an application that has the option of using a VIN decoder to get car information. You can type in the VIN, or you can select through dropdowns, manufacturer, year, make, model, etc. The manufacturer dropdown is the only thing initialized on the page, with no selected value. Selecting a manufacturer will find all available years for that manufacturer and return the list of years, as well as returning the list of manufacturers and the one that was selected. Selecting a year will