All Answers

Hi Tim, here are the answers:

1. Yes you can. There are several ways (about 3) of doing it. See:

https://wisej.com/support/question/how-to-load-the-a-third-part-control-css-file

https://docs.wisej.com/extensions/

https://wisej.com/extensions/

2. Yes. We will have Maps extension supporting Google and Bing maps. But you can refer to point 1 above if you’d like to add it yourself.

3. We don’t use ASP.NET session and there is no Http context available usually since Wisej runs mostly using WebSocket. You can store any session info in Application.Session: See https://docs.wisej.com/docs/controls/general/application#session-object. You can either save each value, or save an object  that  you use in your app with as many fields as you need.

HTH

Best,

Luca

Hello Tung,

The issue is that the asynchronous handler in Wisej doesn’t require the AspNet session – it can handle simultaneous requests really really fast.

You can add this class to your app to require the AspNet session to be created:

namespace Wisej.Core
{
  public class HttpHandlerRequiresSession : Wisej.Core.HttpHandler, System.Web.SessionState.IRequiresSessionState
  {
    // no code required.
  }
}

Then modify your Web.config file like this:

  <add name="wisej" verb="*" path="*.wx" type="Wisej.Core.HttpHandlerRequiresSession, [Assembly Name]"/>

Now all Wisej HTTP requests can use HttpContext.Current.Session.

Notice that I bolded HTTP. That’s because the traditional AspNet session cannot possibly work with WebSocket requests. But you can solve this in two alternative ways:

1. Disable WebSocket: add “enableWebSocket”: false to your Default.json. See https://docs.wisej.com/docs/concepts/configuration
2.  Keep WebSocket enabled and in your Program.Main() add this:

           Application.Session.AspNetSession = HttpContext.Current.Session;

It saves the AspNet session with the Wisej session, which works with WebSocket.

Solution 1 works with the AspNet code that  you mentioned. Solution 2 won’t work since HttpContext.Current.Session for those library will always be null on a WebSocket call.

HTH

Best,

Luca

Hello Gunter,

The ListView doesn’t have the SelectedIndex property (we should probably add it – it’s not in WinForms either) and the SelectedIndices and SelectedItems are read-only collections by design.

To select an item programmatically use the Selected property of the item: this.listView.Items[10].Selected = true. Look also at the SelectionMode and MultiSelect properties on the ListView. https://docs.wisej.com/api/wisej.web/lists-and-grids/listview

See https://msdn.microsoft.com/en-us/library/y4x56c0b(v=vs.110).aspx (you don need to set .Focused = true, use only .Selected = true)

HTH

Best,

Luca

Hello Michael,

You can place any html and javascript (and ASPNET) code in Default.html or Default.aspx. The javascript code can interact with the Wisej app. See https://docs.wisej.com/docs/concepts/javascript-object-model. Also the code behind in ASPNET can use the server side Wisej controls through the Application instance.

Javascript invoked from the server can use anything on the page. The html that you add manually is mixed with the html generated by Wisej widgets.

I tried the same as you and it worked:

<div id="test">Hello</div>

button1_Click(object sender, EventArgs e) {
  Eval("alert(document.getElementById('test').innerHTML)");
}

You can verify the html using F12.

If by Desktop you are referring to the Wisej.Web.Desktop component, it’s different. The desktop component is a Wisej container and support background wallpaper images. You can place HTML in there too if you add an HtmlPanel. You can also use Bing’s beautiful current image rotation by adding the Bing Wallpaper extension, see https://wisej.com/extensions.

Best,

Luca

Hi Michael,

See answers below. If you tell me what you need to do I may be able to give more accurate answers.

1. The HtmlPanel is sized as any other panel. The html is sized depending on the content in order to be able to scroll the overflow. I tried the follow code and it works well. However, you cannot fill the part below the task bar by design, since the workspace is on top of the taskbar, otherwise windows would maximize below. The Desktop already has a Wallpaper property to change the wallpaper, which is also themeable, and it has an extension with source code able to pull in images from Bing.

Application.Desktop.Controls.Add(new HtmlPanel()
 {
 Dock = DockStyle.Fill,
 Html = "<div style='background-color:yellow'>Hello</div>",
 BackColor = Color.White
 });

2. Yes you can manipulate Wisej widgets from JavaScript. See https://docs.wisej.com/docs/concepts/javascript-object-model

There is a whole object model and large methods to use. The code you posted is trying to alter an html element, not a javascript control. When you use Call() or Eval() the JavaScript code is executed in context so you can do Call(“hide”) or Eval(“this.hide()”). However, there is no reason to do that since the control already has Hide() and Show() and if you call the methods on the client, Wisej will update the server back.

Best,

Luca

Hi Michael,

You don’t need to change the locale on the thread. Wisej takes care of that, see:

https://docs.wisej.com/docs/concepts/localization

https://docs.wisej.com/docs/concepts/configuration

Best,

Luca

Hi Rui,

In two ways:

• At startup you get them in the Main method. See the comment in the auto generated Program class, or see https://docs.wisej.com/docs/concepts/configuration look for startup.
• At any time, you can use Application.QueryString and Application.StartupUri.

Best,

Luca

Use System.IO and Application.StartupPath.

Use the regular System.IO classes: Path.Combine(Application.StartupPath, “MyFiles”);

The application path is Application.StartupPath. You also have StartupUri, ExecutablePath, etc.: https://docs.wisej.com/api/wisej.web/general/application

/Luca

Hi Takao,

There are a few different ways you can do this from the client.

You can use fireWidgetEvent:

this.fireWidgetEvent("eventName", {any: "data"});

You can then handle it in Widget.WidgetEvent on the server.

You can also use fireDataEvent:

this.fireDataEvent("eventName", {any: "data"});

You’ll need to override the OnWebRender and OnWebEvent method in your Widget class (see attached project).

The important thing to note is that you need to retain the context of the client-side widget when you’re trying to use fireWidgetEvent or fireDataEvent.

For more info on events in Wisej, read this: https://docs.wisej.com/docs/controls/general/lazy-events.

I attached your project modified to use fireDataEvent. All it does right now is fires an event when the hour or minute changes to update HourValue and MinuteValue.

You can also use Call or Eval if you specify a function in the client-side widget’s context (see the attached sample).

Here is a little information on it: https://docs.wisej.com/docs/concepts/javascript

If you have any questions about it, please let me know.

Best,

Levie