MenuItemBinding.ImageUrlField Property

 

Gets or sets the name of the field from the data source to bind to the ImageUrl property of a MenuItem object to which the MenuItemBinding object is applied.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

[TypeConverterAttribute("System.Web.UI.Design.DataSourceViewSchemaConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
public string ImageUrlField { get; set; }

Property Value

Type: System.String

The name of the field to bind to the ImageUrl of a MenuItem to which the MenuItemBinding is applied. The default is an empty string (""), which indicates that this property is not set.

When the Menu control is bound to a data source, use the ImageUrlField property to specify the name of the field to bind to the ImageUrl property of a MenuItem object. When rendered, the ImageUrl property of each menu item to which the MenuItemBinding object is applied contains the corresponding value from the field. The image is displayed next to a menu item's text and can be in any file format (.jpg, .gif, .bmp, and so on), as long as the client's browser supports that format.

System_CAPS_noteNote

You can override the image for an individual menu item by setting its ImageUrl property directly.

If the data source contains multiple tables or attributes, you must first establish the binding criteria by setting the Depth property, the DataMember property, or both.

Instead of using this property to bind the ImageUrl property of a MenuItem object to a field, you can also bind it to a static value by setting the MenuItemBinding.ImageUrl property. This allows you to display the same image in each menu item to which the MenuItemBinding object is applied.

System_CAPS_noteNote

If the ImageUrl and ImageUrlField properties are both set, the ImageUrlField property takes precedence.

The following code example demonstrates how to use the ImageUrlField property to specify the name of the field to bind to the ImageUrl property of a menu item. For this example to work correctly, you must copy the sample XML data below to a file named Menu.xml.


<%@ page language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>MenuItemBinding Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>MenuItemBinding Example</h3>

      <asp:menu id="NavigationMenu"
        datasourceid="MenuSource"
        runat="server">

        <DataBindings>

          <asp:menuitembinding datamember="MapHomeNode"
            formatstring="({0})" 
            textfield="Title"
            valuefield="Description"
            imageurlfield="ImageUrl"
            tooltipfield="ToolTip"
            target="_self" />
          <asp:menuitembinding datamember="MapNode" 
            depth="1"
            formatstring="[{0}]" 
            textfield="Title"
            valuefield="Description"
            imageurlfield="ImageUrl"
            tooltipfield="ToolTip"
            target="_blank"/>
          <asp:menuitembinding datamember="MapNode" 
            depth="2"
            formatstring="<{0}>" 
            textfield="Title"
            valuefield="Description"
            imageurlfield="ImageUrl"
            tooltipfield="ToolTip"
            target="_blank"/>

        </DataBindings>

      </asp:menu>

      <asp:xmldatasource id="MenuSource"
        datafile="Menu.xml"
        runat="server"/> 

    </form>
  </body>
</html>

The following code is sample site map data for the previous example.

<MapHomeNode ImageUrl="~\Images\Home.gif"

Title="Home"

Description="Root Page"

ToolTip="Home Page">

<MapNode ImageUrl="~\Images\Music.gif"

Title="Music"

Description="Music Category"

ToolTip="Music Page">

<MapNode ImageUrl="~\Images\Classical.gif"

Title="Classical"

Description="Classical Section"

ToolTip="Classical Page"/>

<MapNode ImageUrl="~\Images\Rock.gif"

Title="Rock"

Description="Rock Section"

ToolTip="Rock Page"/>

<MapNode ImageUrl="~\Images\Jazz.gif"

Title="Jazz"

Description="Jazz Section"

ToolTip="Jazz Page"/>

</MapNode>

<MapNode ImageUrl="~\Images\Movies.gif"

Title="Movies"

Description="Movies Category"

ToolTip="Movies Page">

<MapNode ImageUrl="~\Images\Action.gif"

Title="Action"

Description="Action Section"

ToolTip="Action Page"/>

<MapNode ImageUrl="~\Images\Drama.gif"

Title="Drama"

Description="Drama Section"

ToolTip="Drama Page"/>

<MapNode ImageUrl="~\Images\Musical.gif"

Title="Musical"

Description="Musical Section"

ToolTip="Musical Page"/>

</MapNode>

</MapHomeNode>

.NET Framework
Available since 2.0
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