How to generate & render url from database ASP.Net MVC

Question

suppose i store url in database and now i want my form action attribute or ActionLink url should point to url stored in my database. when we use ActionLink then we specify controller & action method name and same way when we use @Html.BeginForm() then we also specify controller & action method name. so how can we customize the code for ActionLink & BeginForm() as a result it should always point to url which is stored in database. please guide me with concept. thanks

Why not just display value in an anchor tag in the href property? — Snowburnt
– Snowburnt, Commented Oct 1, 2013 at 13:48

Darin Dimitrov · Accepted Answer · 2013-10-01 13:50:54Z

5

Why would you want to use the ActionLink or BeginForm helpers if you want to use an url stored in your database?

<a href="@Model.UrlComingFromYourDatabase">Click me</a>

seems just fine. Those helpers are designed to be used to compose an url by giving a controller and action names.

answered Oct 1, 2013 at 13:50

Darin Dimitrov

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2 Comments

Mou Over a year ago

in case of BeginForm() how one can specify url ? suppose url is stored in variable and that variable need to use to set form action...how to do it with BeginForm() ? any guide line!

Darin Dimitrov Over a year ago

You could do it like this: <form action="@Model.UrlComingFromYourDatabase" method="post">...</form>.

pedrommuller · Accepted Answer · 2013-10-01 14:00:09Z

To me just putting the html tags with the model is too verbose I would prefrer to create a custom html helper which will encapsulate the logic behind the tag rendering you can take a look to the mvc code here, but it could be something like this:

        private static MvcForm MyFormHelper(this HtmlHelper htmlHelper, string formAction, FormMethod method, IDictionary<string, object> htmlAttributes)
        {

            //you can use service locator for getting your database artifacts
            //place your custom logic

            TagBuilder tagBuilder = new TagBuilder("form");
            tagBuilder.MergeAttributes(htmlAttributes);
            // action is implicitly generated, so htmlAttributes take precedence.
            tagBuilder.MergeAttribute("action", formAction);
            // method is an explicit parameter, so it takes precedence over the htmlAttributes.
            tagBuilder.MergeAttribute("method", HtmlHelper.GetFormMethodString(method), true);

            bool traditionalJavascriptEnabled = htmlHelper.ViewContext.ClientValidationEnabled
                                                && !htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled;

            if (traditionalJavascriptEnabled)
            {
                // forms must have an ID for client validation
                tagBuilder.GenerateId(htmlHelper.ViewContext.FormIdGenerator());
            }

            htmlHelper.ViewContext.Writer.Write(tagBuilder.ToString(TagRenderMode.StartTag));
            MvcForm theForm = new MvcForm(htmlHelper.ViewContext);

            if (traditionalJavascriptEnabled)
            {
                htmlHelper.ViewContext.FormContext.FormId = tagBuilder.Attributes["id"];
            }

            return theForm;
        }

ViewContext.FormIdGenerator is a internal method you wont be able to just do that in your code.

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