Browser Capabilities - Using the Browser Object in VB

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Browser Capabilities - Using the Browser Object in VB

ASP.NET Internet Browsers Tutorial

This tutorial will show how to reference the Browser object to retrieve information about what your client can display. VB version.

In this tutorial, we reference the Browser Object to display information about both the Client and the Browser. This could help us determine how our users see our page, depending upon their settings. These could also help us display our page differently so that our users get the most out of the site, no matter what their set-up.

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The text attribute of each label in the ASPX page will be dynamically changed upon runtime, depending upon the user configuration / browser.
First, let's create a layout to display the information:

Browser Capabilities:<br />
<table style="width: 95%; position: static; text-align: left">

<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
ActiveX Controls:</td>

</tr>
<tr>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
Background Sounds:</td>

</tr>
<tr>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
.NET Framework:</td>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
Cookies:</td>

</tr>
<tr>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
HTML Frames:</td>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
Java Applets:</td>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
Browser Version:</td>

</tr>
<tr>

<td style="vertical-align: top; width: 30%; text-align: right">
Broswer Platform:</td>

</tr>
<tr>

</tr>

</table>

<br />
</div>

</form>

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The following code checks for values for specific properties of the Browser Object.
We are able to output these values to the user to notify them, but we are also able to use these values in the code to display our page differently to different users. For example, not using ActiveX Controls if the user's browser does not support ActiveX.
The code-behind should look something like this:

Imports Microsoft.VisualBasic
Imports System
Imports System.Data
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls

Partial Public Class _Default

Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

If Request.Browser.ActiveXControls = True Then

Label1.Text = "This browser supports ActiveX Controls."

Else

Label1.Text = "This browser does not support ActiveX controls."

End If

If Request.Browser.AOL = True Then

Label2.Text = "This browser is AOL."

Else

Label2.Text = "This browser is not AOL."

End If

If Request.Browser.BackgroundSounds = True Then

Label3.Text = "This browser supports Background Sounds."

Else

Label3.Text = "This browser does not support Background Sounds."

End If

If Request.Browser.CDF = True Then

Label4.Text = "This browser supports Channel Definition Format."

Else

Label4.Text = "This browser does not support Channel Definition Format."

End If

If Request.Browser.ClrVersion.ToString() <> "0.0" Then

Label5.Text = "This client supports the .NET Framework! You are running version " & Request.Browser.ClrVersion.ToString()

Else

Label5.Text = "You do not have the .NET Framework installed on your machine."

End If

If Request.Browser.Cookies = True Then

Label6.Text = "This browser supports Cookies."

Else

Label6.Text = "This browser does not currently support Cookies."

End If

Label7.Text = "You are running version " & Request.Browser.EcmaScriptVersion.ToString() & " of ECMA Script."

If Request.Browser.Frames = True Then

Label8.Text = "This browser supports HTML Frames."

Else

Label8.Text = "This browser does not support HTML Frames."

End If

If Request.Browser.JavaApplets = True Then

Label9.Text = "This browser supports Java Applets."

Else

Label9.Text = "This browser does not support Java Applets."

End If

Label10.Text = Request.Browser.Type.ToString() & "." & Request.Browser.MinorVersion.ToString()

Label11.Text = Request.Browser.Platform

End Sub

End Class

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