html-helper | 易学教程

Adding a onclick dynamically using an Html Helper in MVC

阅读更多关于 Adding a onclick dynamically using an Html Helper in MVC

问题 I need the ability to dynamically set an onclick using an HTML Helper. the below is what I'm trying to do, but i'm getting an obvious syntax error <%=Html.CheckBox("checkboxname", item.Id = 3, New With {.onclick = "ajaxThis(this, <%= Html.Encode(item.ID) %>, '<%= Html.Encode(item.NUMBER) %>');"})%> 回答1: The first step would be to remove the <%= %> from <%= Html.Encode(item.ID) %> and just call Html.Encode(item.ID) directly. Do the same with the item.NUMBER encoding. Something like: "ajaxThis

Model Property Display Name using Reflection

阅读更多关于 Model Property Display Name using Reflection

问题 I am working on a project where I need to output a few hundred properties on to the screen. To save myself lots of tedious markup, I decided to use reflection. //markup removed to keep this concise @for (var i = 0; i < Model.SiteAndJobDetails.GetType().GetProperties().Count(); i++) { @Model.SiteAndJobDetails.GetType().GetProperties()[i].Name @Model.SiteAndJobDetails.GetType().GetProperties()[i].GetValue(Model.SiteAndJobDetails, null) } Although slower to render, this will save me writing out

Creating recursive method helper with Func<>

阅读更多关于 Creating recursive method helper with Func

问题 I have two method helper with theses signatures: @helper CreateNavigation(int parentId, int depthNavigation) @helper Navigation(int parentId, int depthNavigation) I have tried to convert it to a proper method for using in ASP.NET Core 2 . But I got an error in VS2017 IDE that is: 1- Use of unassigned local variable 'Navigation' 2- local variable 'Navigation' might not be initialized before accessing How can I fix it? @using Microsoft.AspNetCore.Html @using Microsoft.AspNetCore.Mvc.Razor

Strange behavior in helper method DropDownListFor

阅读更多关于 Strange behavior in helper method DropDownListFor

问题 I see a weird thing in DropDownListFor . This is a part of My View: 1:<dt> 2: @Html.LabelFor(model => model.MainModel.DefaultAreaId) 3:</dt> 4:<dd> 5: @Html.DropDownListFor(model => model.MainModel.DefaultAreaId, Model.FKs["DefaultAreaId"].Items, new { @class = "Areadd" }) 6: @Html.ValidationMessageFor(model => model.MainModel.DefaultAreaId, null, new { @class = "invalid-side-note" }) 7:</dd> I Check in Debug the Last Line of My Controller: return View(model); And the values of Model.FKs[

ASP.NET MVC ActionLink renders erroneously

阅读更多关于 ASP.NET MVC ActionLink renders erroneously

问题 SO community I have the following issue: If i render an ActionLink like this: @Html.ActionLink(titleText, Title.Href.TargetAction, Title.Href.TargetController, Title.Href.TargetRouteValues, null) the rendered element is: <a href="/eagle/Intervention/Edit_Inv?ID_INV=53165"> 19/ 2013</a> but if i add an object as HTMLAttributes like this: @Html.ActionLink(titleText, Title.Href.TargetAction, Title.Href.TargetController, Title.Href.TargetRouteValues, new {target="_blank"}) i get the following

HTML helpers in ASP.NET MVC 3 with Javascsript action

阅读更多关于 HTML helpers in ASP.NET MVC 3 with Javascsript action

问题 I have many HTML helper in Helpers.cshtml file, but some of the helper (html) need some jquery action, so how do i can call jquery inside helpers.cshtml, is that possible? i know we can keep the js file in header or particular page, but i do not want to do like that, i want to use jquery or javascript only on the page which loaded particular helper. anyone have idea on this? My scenario is, i have list box control, that is properly loading from helper, but i need to apply custom theme to the

ASP.NET MVC 4 HtmlHelper - mix decoded HTML with encoded HTML

阅读更多关于 ASP.NET MVC 4 HtmlHelper - mix decoded HTML with encoded HTML

问题 I'm writing a helper method that will generate comment's HTML on a page and I want to be able to show a comment with "< script >alert("hello");< /script >" as it's content. When using @HttpUtility.HtmlDecode(comment.Content) in a *.cshtml file, that script gets rendered as plain text. But when using this HTML helper in a View: @Html.PendingComment(comment) the script gets rendered as HTML and gets executed: public static IHtmlString PendingComment(this HtmlHelper helper, VoidCommentPending

hiddenFor helper is pulling id from action parameter, not the viewModel

阅读更多关于 hiddenFor helper is pulling id from action parameter, not the viewModel

问题 I've stumbled upon a really weird situation with ASP.Net MVC, passing an "id" as an action parameter and an "id" hidden form element. I have an action that has an "id" parameter. This id value represents a project. I have a controller action where I'm creating a data entry form for assigning an employee to the passed in project (I create a drop down list where administrator selects an employee to be assigned to passed project). By assigning an employee to a project, I create a ProjectEmployee

Building Html in Html Helper using Razor or Tag builder?

阅读更多关于 Building Html in Html Helper using Razor or Tag builder?

问题 I am building a Html Helper in MVC 4 and I want to know how to build tags / html in the html helpers properly. For example here is simple html helper that creates image tag using TagBuilder class: public static MvcHtmlString Image(this HtmlHelper html, string imagePath, string title = null, string alt = null) { var img = new TagBuilder("img"); img.MergeAttribute("src", imagePath); if (title != null) img.MergeAttribute("title", title); if (alt != null) img.MergeAttribute("alt", alt); return

Register custom control in MVC3 ASPX Partial view

阅读更多关于 Register custom control in MVC3 ASPX Partial view

I ask a relevant question here and as I find there is no way to use custom control in Razor views, so I get to add new ASPX partial view to use custom control, my custom control is a dll that I added to References then define Partial view as the following: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<System.DateTime?>" %> <%@ Register Assembly="JQControls" Namespace="JQControls" TagPrefix="PersianDatepicker" %> <PersianDatepicker:JQLoader ID="jqdb" runat="server" /> <PersianDatepicker:JQDatePicker ID="jqdp1" runat="server" Regional="fa" /> I write the exact code in ASPX