dropdownlistfor

问题 I am new using MVC approach. How to using the DropDownListfor in the MVC? I need get the list from my master table and show the option into the Business Premise in the Business Profile object. This is my ViewModel public class SMEAppViewModel { public WP2PBusinessProfile BuisinessProfile { get; set; } public IEnumerable<WP2PMasterDropDownList> MasterList { get; set; } } In my controller, I already initialize the MasterList to the List var _MasterList = _context.WP2PMasterDropDownList.ToList()

问题 Inside model I have data annotations: [Required(ErrorMessageResourceName = "SelectCategory", ErrorMessageResourceType = typeof(MyProject.Properties.Resources)), Range(1, int.MaxValue, ErrorMessageResourceName = "SelectCategory", ErrorMessageResourceType = typeof(MyProject.Properties.Resources))] public int CategoryId { get; set; } public virtual Category Category { get; set; } and two situations: Situation1 Inside controller I have List<Category> categories = db.GetCategories(); ViewBag

问题 I have multiple DropDownListFor's and the selected item is not showing up. The variable storing the selected item is populated correctly. Heres the code Models View Model public class StepFourView { #region Public Properties public IEnumerable<PulldownItem> Levels { get; set; } public IEnumerable<PulldownItem> Approaches { get; set; } public IEnumerable<PulldownItem> Types { get; set; } public StepFour StepFour{ get; set; } #endregion } StepFourModel [Table(Name = "StepFours")] public class

问题 First time using MVC to develop an app and have run into an issues populating a dropdown in the student create view with a list of teachers. I have 2 models public class Student { [Required] [Display(Name = "ID")] public int ID { get; set; } [Required] [StringLength(100)] [DataType(DataType.Text)] [Display(Name = "First Name")] public string FirstName { get; set; } [Required] [StringLength(100)] [DataType(DataType.Text)] [Display(Name = "Last Name")] public string LastName { get; set; }

问题 Can you please help with the error below? What is wrong with my codes. Thanks for your help. Error: The ViewData item that has the key 'CategoryId' is of type 'System.Int32' but must be of type 'IEnumerable'. controller public ActionResult ProductCreate() { ViewBag.Suppliers = db.Suppliers.Where(x => x.IsActive).ToList(); ViewBag.Categories = new SelectList(db.Categories.Where(x => x.IsActive).ToList(), "Id", "Name").ToList(); return View(); } [HttpPost] [ValidateAntiForgeryToken] public

问题 Can you please help with the error below? What is wrong with my codes. Thanks for your help. Error: The ViewData item that has the key 'CategoryId' is of type 'System.Int32' but must be of type 'IEnumerable'. controller public ActionResult ProductCreate() { ViewBag.Suppliers = db.Suppliers.Where(x => x.IsActive).ToList(); ViewBag.Categories = new SelectList(db.Categories.Where(x => x.IsActive).ToList(), "Id", "Name").ToList(); return View(); } [HttpPost] [ValidateAntiForgeryToken] public

问题 I have a dropdown list (@html.DropDownListFor) wherein I am showing name of colors... I want to display each item having seperate background color.. Like, an item "Green" should be in green background, and "Yellow" in yellow background. How can I achieve this? 回答1: Don't forget that you can always write old fashioned HTML in a view (OMG!). But, if you are using the code in multiple places, then write a helper that extends DropDownListFor to create your select with styling. If you are using it

问题 In my application, I'm using AutoCompleteTextView. One of the requirements is to hide the divider. I have added AutoCompleteTextView to layout: <AutoCompleteTextView android:id="@id/address_bar" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="15dp" android:layout_marginRight="8dp" android:layout_toLeftOf="@id/address_operation_btn" android:background="@null" android:completionThreshold="1" android:dropDownAnchor="@id/anchor" android

问题 Controller: public ActionResult Filter() { ViewBag.Accounts = BusinessLayer.AccountManager.Instance.getUserAccounts(HttpContext.User.Identity.Name); return View(); } View: <td>Account: </td> <td>@Html.DropDownListFor("accountid", new SelectList(ViewBag.Accounts, "AccountID", "AccountName"))</td> ViewBag.Accounts contains Account objects which have AccountID , AccountName and other properties. I would like a DropDownList called accountid (so that on Form Post I can pass the selected AccountID)

问题 I have a dropdownlistfor with True/False values. I want the default value to be true. Right now it's false because the default of a bool is false. This dropdown sometimes gets created dynamically in javascript so I can't set the value in the model before it gets passed. How do I set the default to True in the chtml file? Thank you. //---------- cshtml file --------------- ... <td class="valuebool"> @Html.DropDownListFor(m => m.IsBoolFilterCondition, new SelectList( new[] { // The following