Server-side Programming Overview

Updated on Oct 27, 2025

Overview of the Server-side APIs you can use to create and configure the Telerik WebForms SpeechToTextButton control.

Creating the SpeechToTextButton in the Markup

To create a SpeechToTextButton in the markup, add the RadSpeechToTextButton element to the page and set its properties. You can find the full list of properties in the Properties article.

Example

ASP.NET

<telerik:RadSpeechToTextButton runat="server" ID="RadSpeechToTextButton1" Icon="headset" StopIcon="pause-sm" Continuous="true" InterimResults="true" MaxAlternatives="5" Size="Large" Rounded="Full" FillMode="Outline" ThemeColor="Info">
	<Messages Start="Start" Stop="Stop" Unsupported="Not supported" NotInitialized="Initializing..." />
</telerik:RadSpeechToTextButton>

Creating the SpeechToTextButton Dynamically

To create the SpeechToTextButton on the server, create a new instance of the RadSpeechToTextButton object, set its properties and add it to the Controls collection of another control (e.g. a PlaceHolder).

You can find the properties and enums in the following articles:

• Properties
• Enums

Example

C#

protected void Page_PreInit(object sender, EventArgs e)
{
    RadSpeechToTextButton speechButton = new RadSpeechToTextButton()
    {
        Icon = "headset",
        StopIcon = "pause-sm",
        Continuous = true,
        InterimResults = true,
        MaxAlternatives = 5,
        Size = SpeechToTextButtonSize.Large,
        Rounded = SpeechToTextButtonRounded.Full,
        FillMode = SpeechToTextButtonFillMode.Outline,
        ThemeColor = SpeechToTextButtonThemeColor.Success
    };

    speechButton.Messages.NotInitialized = "Initializing...";
    speechButton.Messages.Start = "Start";
    speechButton.Messages.Stop = "Stop";
    speechButton.Messages.Unsupported = "Not supported";

    PlaceHolder1.Controls.Add(speechButton);
}

VB

Protected Sub Page_PreInit(ByVal sender As Object, ByVal e As EventArgs)
    Dim speechButton As RadSpeechToTextButton = New RadSpeechToTextButton() With {
        .Icon = "headset",
        .StopIcon = "pause-sm",
        .Continuous = True,
        .InterimResults = True,
        .MaxAlternatives = 5,
        .Size = SpeechToTextButtonSize.Large,
        .Rounded = SpeechToTextButtonRounded.Full,
        .FillMode = SpeechToTextButtonFillMode.Outline,
        .ThemeColor = SpeechToTextButtonThemeColor.Success
    }

    speechButton.Messages.NotInitialized = "Initializing..."
    speechButton.Messages.Start = "Start"
    speechButton.Messages.[Stop] = "Stop"
    speechButton.Messages.Unsupported = "Not supported"

    PlaceHolder1.Controls.Add(speechButton)
End Sub

PlaceHolder1 declaration

ASP.NET

<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>

Creating controls programmatically must be done in an early event such as PreInit (preferably) or Init. For more details see the ASP.NET Page Life-Cycle Events

Next Steps

• Properties
• Enums