RadControls for ASP.NET AJAX Sometimes it is necessary to locate a control contained inside a template.
If the control is given an ID in the template, it can be retrieved from its
container (the first control in the parent hierarchy that supports
INamingContainer). Simply call the
FindControl method of the container object to obtain a
reference to the control in the template.
The most difficult case is locating a control inside the
TimeTemplate or AlternatingTimeTemplate of a
RadTimeView control. This is difficult because there are
several controls with the same ID. However, each is contained logically in the
namespace of the DataListItem control that is its container.
You can access the container by using the DataList property of
the RadTimeView control. You can then go through the data
list's Items collection to retrieve the DataListItem for a
given index. Once you have found the DataListItem of interest,
call its FindControl method to retrieve a reference to the
control in the template.
Example
The following definitions declare a RadTimePicker that has
a TimeTemplate defined, and a Button whose
Click event handler needs to access a control in the
template:
CopyASPX
<telerik:RadTimePicker ID="RadTimePicker1" runat="server">
<TimeView>
<TimeTemplate>
<input style="width: 100%;"
runat="server"
id="Button1"
type="button"
value='<%# DataBinder.Eval(Container, "DataItem.Time", "{0:t}")%>' />
</TimeTemplate>
</TimeView>
</telerik:RadTimePicker>
<asp:Button
ID="btnChangeColor"
runat="server"
Text="Change Color"
OnClick="btnChangeColor_Click" />In the codebehind, the button's Click handler uses the
FindControl method of the DataListItem to
locate the control in the template:
CopyC#
protected void btnChangeColor_Click(object sender, EventArgs e)
{
foreach (DataListItem dataListItem in RadTimePicker1.TimeView.DataList.Items)
{
HtmlInputButton button = (HtmlInputButton)dataListItem.FindControl("Button1");
button.Style.Add("background-color", "red");
}
}CopyVB.NET
Protected Sub btnChangeColor_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnChangeColor.Click
For Each dataListItem As DataListItem In RadTimePicker1.TimeView.DataList.Items
Dim button As HtmlInputButton = DirectCast(dataListItem.FindControl("Button1"), HtmlInputButton)
button.Style.Add("background-color", "red")
Next
End SubSee Also