Muhammad Faraz Muhammad Faraz - 11 months ago 142
ASP.NET (C#) Question

How does @Html.BeginForm() work? and search result in Microsoft ASP.Net MVC 5 tutorial?

I am working on MVC 5 Asp.Net and following this tutorial. I am wondering that how the heck does this fetches the result when i click the Filter button.

There comes a point where this code is added in Movie/view/Index.cshtml

@using (Html.BeginForm()){
<p> Title: @Html.TextBox("SearchString") <br />
<input type="submit" value="Filter" /></p>

Now as far as I know, it creates a textbox a button on screen. But how is this button calling the search(index) function and passing the value of textbox in function, i could not get this.
Plzz elaborate it, I am new in it. Sorry for this stupid stuff. Thanks

Answer Source

It's not a stupid question. @html.BeginForm() works like this. It has some parameters you could add to it like Action Controller FormType htmlAttributes. The way it works is that if you leave it empty it will look for a post action with the same name that on the page you are now, for example if you are in on the login page, it will look for a login post action. Me, at all times, write what action and controller I want it to access.

@html.BeginForm("AddUser", "Admin", FormMethod.Post, new { @class = "my_form"})

So your post action should accept parameters that your form contain, and that can be a Model ie a Product, ViewModel or singel string parameters. In your case with the search your action should look like

public ActionResult Search(string SearchString) 
   //do something here

Please note here, for the search string to be passed into the method. The name of the <input> has to be the same as the parameter your action takes. Sour form should be like this

@using (Html.BeginForm("Search", "YOUR CONTROLLER", FormMethod.Post)){    
     <p> Title: @Html.TextBox("SearchString") <br />   
     <input type="submit" value="Filter" /></p> 

Hope this brings clarity.