Ajax Label For Asp.Net

Enter a word or phrase in the text box then click "Change AsyncLabel Text" to assign the text box value to the AsyncLabel text.
Click "Change the Label CSS class" to reassign a different CSS class to the AsyncLabel (this functionality is available to most AsyncControls).

This is an AsyncLabel.

The AsyncLabel is one of the only AsyncControl that provides you with over 9 built-in HtmlGenericControls. When utilizing RenderMode you can render the AsyncLabel as: H1-H6, Label, Span, Div, etc.

Has 9 render modes, giving the AsyncLabel the ability to render as 9 different HtmlGenericControls.
Change it's Text value during an AsyncCallback.
Can be scrolled into view during an AsyncCallback.
Its an AsyncWebControl, which means that you can change it's visibility, CSS class, Left/Top coordinate, Width/Height, and ForeColor/BackColor, during an AsyncCallback.
Supports many of the other properties provided by asp:Label.
Functions as a regular server control if the browser does not support asynchronus operations, allowing you to support legacy browsers.

<%@ Register Assembly="AsyncControls" Namespace="DelvingWare.AsyncControls" TagPrefix="dw" %>

<dw:AsyncButton runat="server" ID="btVisible"
CssClass="greyButton"
OnClick="btVisible_Click"
Text="Hide AsyncLabel" />
<br/>
<dw:AsyncLabel runat="server" ID="lblMain" 
    RenderMode="H4"
    CssClass="asyncLabel">This is an AsyncLabel.</dw:AsyncLabel>
<p />
<dw:AsyncTextBox runat="server" ID="txtMain" 
EnableValidation="enabled"
MaxLength="20" />

<dw:AsyncButton runat="server" ID="btMain" 
CausesValidation="true" 
OnClick="btMain_Click"
CssClass="greyButton">Change AsyncLabel Text</dw:AsyncButton>

<p />
<dw:AsyncButton runat="server" ID="btChangeCss" 
OnClick="btChangeCss_Click"
CssClass="greyButton">Change the Label CSS class</dw:AsyncButton>

using System;
using DelvingWare.AsyncControls;
...
protected void btChangeCss_Click( object sender, AsyncEventArgs ae )
{
    if ( lblMain.Tag == null )
    {
        // store the current CSS class
        lblMain.Tag = lblMain.CssClass;

        // change the css class for the AsyncLabel
        lblMain.CssClass = "lblMainClass";
    }
    else
    {
        // reuse the stored CSS class
        lblMain.CssClass = lblMain.Tag as String;

        // clear the tag object
        lblMain.Tag = null;
    }
}

protected void btMain_Click( object sender, AsyncEventArgs ae )
{
    // ensure the page is valid
    if ( AsyncPage.IsValid )
    {
        // update the AsyncLabel
        lblMain.Text = txtMain.Text;

        // focus the AsyncTextBox
        txtMain.Focus();

        // select all the text within the AsyncTextBox
        txtMain.SelectAll();
    } 
}

protected void btVisible_Click( object sender, AsyncEventArgs ae )
{
    // change the visibility
    lblMain.Visible = !lblMain.Visible;

    // update the AsyncButton text
    if ( lblMain.Visible )
        btVisible.Text = "Hide AsyncLabel";
    else
        btVisible.Text = "Show AsyncLabel";
}

Imports System
Imports DelvingWare.AsyncControls
...

Protected Sub btChangeCss_Click(ByVal sender As Object, ByVal ae As AsyncEventArgs)
    If (lblMain.Tag = Nothing) Then
        ' store the current CSS class
        lblMain.Tag = lblMain.CssClass
        ' change the css class for the AsyncLabel
        lblMain.CssClass = "lblMainClass"
    Else
        ' reuse the stored CSS class
        lblMain.CssClass = CType(lblMain.Tag,String)
        ' clear the tag object
        lblMain.Tag = Nothing
    End If
End Sub

Protected Sub btMain_Click(ByVal sender As Object, ByVal ae As AsyncEventArgs)
    ' ensure the page is valid
    If AsyncPage.IsValid Then
        ' update the AsyncLabel
        lblMain.Text = txtMain.Text
        ' focus the AsyncTextBox
        txtMain.Focus
        ' select all the text within the AsyncTextBox
        txtMain.SelectAll
    End If
End Sub

Protected Sub btVisible_Click(ByVal sender As Object, ByVal ae As AsyncEventArgs)
    ' change the visibility
    lblMain.Visible = Not lblMain.Visible
    ' update the AsyncButton text
    If lblMain.Visible Then
        btVisible.Text = "Hide AsyncLabel"
    Else
        btVisible.Text = "Show AsyncLabel"
    End If
End Sub

h4.asyncLabel {
    color: #777;
    font-family: verdana, arial, serif;
    font-size: 10pt;
}