checked-state.md

title	page_title	description	slug	tags	published	position
Checked State	Checked State - RadSwitch	Check our Web Forms article about Checked State.	switch/functionality/checked-state	checked,state	true	0

Checked State

This help article showcases how to check/uncheck the RadSwitch control on the server-side/client-side.

• Get/Set Checked State Server-Side

• Get/Set Checked State Client-Side

Get/Set Checked State Server-Side

You can get/set the checked state of the RadSwitch control on the server-side through the Checked property.

tip The Checked property takes a nullable boolean. When a null value is set, the Checked value will default to false. This is useful for data-binding scenarios when the Checked property is bound to a data source field of nullable boolean type.

caption Example 1: Check RadSwitch in the markup.

<telerik:RadLabel ID="Label1" runat="server" AssociatedControlID="RadSwitch1" Text="I agree"></telerik:RadLabel>
<telerik:RadSwitch ID="RadSwitch1" runat="server" Checked="true"></telerik:RadSwitch>

caption Example 2: Get/Set the Checked property from the server-side.

protected void Page_Init(object sender, EventArgs e)
{
	bool isChecked = RadSwitch1.Checked;
	RadSwitch1.Checked = !isChecked;
}

Protected Sub Page_Init(sender As Object, e As EventArgs)
	Dim isChecked As Boolean = RadSwitch1.Checked
	RadSwitch1.Checked = Not isChecked
End Sub

Get/Set Checked State Client-Side

To get/set the checked state of the RadSwitch control on the client-side you can use the get_checked() and set_checked() properties of the control.

caption Example 3: Toggle the initial checked state of RadSwitch.

function pageLoad() {
	var switchObj = $find("<%=RadSwitch1.ClientID%>");
	var isChecked = switchObj.get_checked();
	switchObj.set_checked(!isChecked);
}

<telerik:RadLabel ID="Label1" runat="server" AssociatedControlID="RadSwitch1" Text="I agree"></telerik:RadLabel>
<telerik:RadSwitch ID="RadSwitch1" runat="server" Checked="true"></telerik:RadSwitch>

See Also

• [Getting Started]({%slug switch/getting-started%})

• [Server-Side API]({%slug switch/server-side-programming/properties-and-events%})

• [Client-Side API]({%slug switch/client-side-programming/overview%})