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ASP.NET Mobile SelectionList Control


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Definition and Usage

The SelectionList control is used to create a list on a mobile device.

Differences between a SelectionList control and a List control:

  • A SelectionList control supports multiple item selections and the List control only supports single item selections
  • A SelectionList control supports drop-down lists, combo boxes, and radio buttons and the List control only supports common lists
  • An item selected from a SelectionList control does not generate a server event
  • A SelectionList control does not offer pagination

Properties

Property Value Description
Alignment left
center
right
Optional. How to align the list
BackColor rgb(x,x,x)
#xxxxxx
colorname
Optional. A background color for the list
DataMember dataMember Optional. Specifies the data member to extract in data binding to a data source
DataTextField dataTextField Optional.
DataValueField dataValueField Optional.
ForeColor rgb(x,x,x)
#xxxxxx
colorname
Optional. A foreground color for the list
Font-Bold false
true
Optional. Specifies whether or not the text in the list should be bold
Font-Italic false
true
Optional. Specifies whether or not the text in the list should be italic
Font-Name fontname Optional. Specifies the font name of the text in the list
Font-Size normal
small
large
Optional. Specifies the font size of the text in the list
id unique_name Optional. A unique id for the control
OnItemDataBind function_name Optional. The name of the function to be executed when an item is data bound to a MobileListItem object
OnSelectedIndexChanged function_name Optional. The name of the function to be executed when the index of the selected item has changed
Rows rows Optional. Specifies the number of rows to display. Default is "4"
runat "server" Required. Specifies that the control is a server control
SelectType DropDown
ListBox
Radio
MultiSelectListBox
CheckBox
Optional. Specifies the type of list to display. "DropDown" is default.
StyleReference name_of_style_element Optional. Specifies a reference to a style to be applied to the control
Title text Optional. Specifies a title to display. Only for WML devices
Wrapping wrap
nowrap
Optional. Specifies whether or not the text in the list should wrap

Example 1

The following example is an .aspx page with two forms. The first form has a list of cars. The second form is activated when a car is selected in the first form, and it displays the price of the selected car:

<%@ Page
Inherits="System.Web.UI.MobileControls.MobilePage"%>
<%@ Register TagPrefix="Mobile"
Namespace="System.Web.UI.MobileControls"
Assembly="System.Web.Mobile" %>

<script runat="server">
Sub Car_Click(sender as Object, e as EventArgs)
ActiveForm=f2
t1.text=cars.Selection.Value
End Sub
</script>

<Mobile:Form id="f1" runat="server">
  <Mobile:SelectionList runat="server" id="cars" >
    <Item Text="Volvo" Value="$30,000" />
    <Item Text="BMW" Value="$32,000" />
    <Item Text="Audi" Value="$34,000" />
  </Mobile:SelectionList>
  <Mobile:Command runat="server"
  OnClick="Car_Click" Text="Submit" />
</Mobile:Form>

<Mobile:Form id="f2" runat="server">
  <Mobile:Label id="t1" runat="server" />
</Mobile:Form>

When this page is displayed on a mobile device, the navigation and display functions of the page will be compiled differently for different devices with different display characteristics.

Fore some devices, like a handheld PC, it might display a dropdown list to choose from. For a cell phone it might display a list of options to select from.

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