ASP.NET

HHHEEEEEELLLPP!! - async WebAPI call never returns

18-Feb-14 15:21

Quote:
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There are only 10 types of people in the world, those who understand binary and those who don't.

Rob Achmann16-Feb-14 7:47

Re: HHHEEEEEELLLPP!! - async WebAPI call never returns

16-Feb-14 7:47

Quick question..
I have WebAPI - like /api/SomeName

Called directly in my browser, it works - it returns JSON results.

I want to call WebAPI asynchronously.

using (HttpClient httpClient = new HttpClient())
{
    string response = await httpClient.GetStringAsync("/api/SomeName");
    return response;
}

But the GetStringAsync NEVER returns! Aaaarrrg

Is this the correct way to call it - of should I do something else?

Any tips? Advice? Hints?

maker of .Net thingys

Kornfeld Eliyahu Peter16-Feb-14 9:51

Kornfeld Eliyahu Peter

16-Feb-14 9:51

Doesn't GetStingAsync returns Task<string>?
You may got an error that does not show up?

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Re: HHHEEEEEELLLPP!! - async WebAPI call never returns

Rob Achmann16-Feb-14 10:25

Re: HHHEEEEEELLLPP!! - async WebAPI call never returns

16-Feb-14 10:25

perhaps.

I'm closing the question and continuing down a different path.

Thanks though..

maker of .Net thingys

ZurdoDev18-Feb-14 15:23

Click Event in Menu Control not firing

18-Feb-14 15:23

You could use jQuery's .ajax() method to call asynchronously from the client side, if you are using a browser. http://api.jquery.com/jQuery.ajax/[^]

There are only 10 types of people in the world, those who understand binary and those who don't.

Kandepu Rajesh15-Feb-14 18:17

Kandepu Rajesh

15-Feb-14 18:17

I have a Menu Control in my ASP.Net page. The click event is not firing. Can anyone help me why the event is not firing.

Rob Achmann16-Feb-14 1:48

16-Feb-14 1:48

Need more details. Please don't think anyone can help you with a question like that.

It's as bad as "My car doesn't start".

What's the technology stack you're using for asp.net? What version?
Are you trying to do this from javascript, or by code behind, or event routing? What version of VS? Are you even using VS?

Any code to share???

GaltSalt
maker of .Net thingys

Kandepu Rajesh16-Feb-14 10:24

Kandepu Rajesh

16-Feb-14 10:24

ems>
<asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home" />
<asp:MenuItem NavigateUrl="~/Research.aspx" Text="Research" />
<asp:MenuItem NavigateUrl="~/Team.aspx" Text="Team" />
<asp:MenuItem NavigateUrl="~/Methods.aspx" Text="Methods" />
<asp:MenuItem NavigateUrl="~/Excel Report.aspx" Text="Case Studies" />
<asp:MenuItem NavigateUrl="~/RehabAnalytics.aspx" Text="RehabAnalytics" />
<asp:MenuItem NavigateUrl="~/InputTestResults.aspx" Text="InputTestResults" />

protected void NavigationMenu_MenuItemClick(object sender, MenuEventArgs e)
{
e.Item.Selected = true;
}

Prasad Vj16-Feb-14 21:07

Prasad Vj

16-Feb-14 21:07

Hi Rahesh,

Try like this.

XML

<asp:Menu ID="NavigationMenu" OnMenuItemClick="NavigationMenu_MenuItemClick" runat="server">
 <items>
  <asp:MenuItem Text="menuItem1" NavigateUrl="Default.aspx" />
  <asp:MenuItem Text="menuItem2" NavigateUrl="otherWeb.aspx" />
 </items>

Internet Explorer have some issues with this , try in different browsers

Rob Achmann19-Feb-14 3:32

19-Feb-14 3:32

Kandepu - was this solved?

maker of .Net thingys

ZurdoDev18-Feb-14 15:25

18-Feb-14 15:25

Quote:
"My car doesn't start".

It's one of your spark plugs, duh. Smile | :)

There are only 10 types of people in the world, those who understand binary and those who don't.

Rob Achmann19-Feb-14 3:30

19-Feb-14 3:30

Don't laugh! Many moons ago, I saw a 1972 Mercedes 220 in beautiful condition in a mechanic's yard. I asked how much he wanted for it. He said "Never mind, it don't work". But how much, I insisted.. "Oh, $500 I guess..." Paid it on the spot. Tried to get it to turn over; no joy - the mechanic sneered. Opened the hood - and noted that for that year, the spark plug cables were out of order from the distributor. Rearranged the cables, started it up and drove of... lol His wife came barreling out of the office yelling at the mechanic to get the car back.... I smiled as I passed by, saying Thank you!

maker of .Net thingys

ZurdoDev19-Feb-14 3:51

19-Feb-14 3:51

That's great.

There are only 10 types of people in the world, those who understand binary and those who don't.

mvc 4 Ajax.BeginForm with Web API?

Prasad Vj16-Feb-14 21:09

Prasad Vj

16-Feb-14 21:09

Hi Rajesh,

Try like this,

XML

<asp:Menu ID="NavigationMenu" OnMenuItemClick="NavigationMenu_MenuItemClick" runat="server">
 <items>
  <asp:MenuItem Text="menuItem1" NavigateUrl="Default.aspx" />
  <asp:MenuItem Text="menuItem2" NavigateUrl="otherWeb.aspx" />
 </items>

IE have some problems, so try in diff. browsers

Rob Achmann15-Feb-14 15:06

Re: mvc 4 Ajax.BeginForm with Web API?

15-Feb-14 15:06

vs 2013 express for web

I have an MVC 4 web app and a WebAPI service returning JSON formatted data.

I tried to use Ajax.BeginForm to call the WebAPI service.

It does call it correctly

@model IEnumerable<MyApp.Models.SomeClass>

@using (Ajax.BeginForm(
            new AjaxOptions
            {
                HttpMethod = "get",
                Url="api/MyWebAPI",
                InsertionMode = InsertionMode.Replace,
                UpdateTargetId = "Resultlist"
            }))
{

    <div class="row">
        <div class="col-lg-12">
            <h3>Service Call Details - Method A</h3>
            <input type="submit" class="btn btn-default" value=" Get Via Asynch Method A " />
        </div>
    </div>
}
<div id="ResultList">
    <table class="table">
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Name)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Caption)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Description)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Active)
            </th>
        </tr>

        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Name)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Caption)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Description)
                </td>
                <td>
                    @Html.ActionLink("Edit", "Edit", new { id = item.ClassifierGroupId }) |
                    @Html.ActionLink("Details", "Details", new { id = item.ClassifierGroupId }) |
                    @Html.ActionLink("Delete", "Delete", new { id = item.ClassifierGroupId })
                </td>
            </tr>
        }

    </table>

</div>

But the results don't fill the form.

Now, when the data came from the Home controller's Index function, that returned data as a View with model as an ActionRequest...:

public ActionResult Index()
  {
      ViewBag.Title = "Home Page";

      IEnumerable<SomeClass> model = db.SomeClasses.ToList();


      return View(model);
  }

So how do I convert the WepAPI returned JSON data to something that the razor form can use for the Model data?

Any help appreciated.

GS Sniff | :^)

GaltSalt
maker of .Net thingys

Rob Achmann16-Feb-14 10:48

Re: mvc 4 Ajax.BeginForm with Web API?

16-Feb-14 10:48

The service is doing exactly what it's supposed to: return data.

What I really need is to convert that data into the PartialView that it belongs in.

I'm guessing there's no real way to do this in JavaScript, is there?

The only thing you can do is build the HTML manually in JavaScript.

So calling a WebAPI in Asynch JS is basically a useless oddity if what you want to do is send the contents to a View or PartialView, like it would from calling your Index controller function.

Can anyone prove otherwise?

maker of .Net thingys

Rob Achmann19-Feb-14 3:33

Build API in ASP.NET Web Form

19-Feb-14 3:33

I used another asych request to call the controller with the data - but this is only useful if the WebAPI service is on a different server.

maker of .Net thingys

Hy Chanhan15-Feb-14 5:14

Hy Chanhan

15-Feb-14 5:14

Dear All,

I have no experience to build API before at all.

I'm using ASP.NET Web Form with C#.

How to start?

Thanks,

Re: Build API in ASP.NET Web Form

Rob Achmann16-Feb-14 1:51

Re: Build API in ASP.NET Web Form

16-Feb-14 1:51

This isn't a good question for here. Try Google search for tutorial.

Even Microsoft.

http://www.asp.net/mvc/tutorials

GaltSalt
maker of .Net thingys

ZurdoDev18-Feb-14 15:26