TreeNodeBinding::ImageUrlField Property

 

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

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

public:
[TypeConverterAttribute("System.Web.UI.Design.DataSourceViewSchemaConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
property String^ ImageUrlField {
	String^ get();
	void set(String^ value);
}

Property Value

Type: System::String^

The name of the field to bind to the ImageUrl property of a TreeNode object to which the TreeNodeBinding object is applied. The default is an empty string (""), which indicates that the ImageUrlField property is not set.

When the TreeView 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 TreeNode object. This binding relationship affects all TreeNode objects to which the TreeNodeBinding object is applied. The image is displayed next to a node and can be in any file format (.jpg, .gif, .bmp, and so on), as long as the client browser supports the format.

System_CAPS_noteNote

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

Instead of using this property to bind the ImageUrl property of a TreeNode object to a field, you can set the ImageUrl property to a fixed value by setting the ImageUrl property.

System_CAPS_noteNote

If the data source contains multiple fields, you must first set the Depth or DataMember property, or both properties in order to bind to the appropriate field.

When displaying an image next to a node with the ImageUrlField property, you should also consider setting the ImageToolTipField property. The ToolTip text that you specify provides Assistive Technology devices with a description of the image that can be used to make the control more accessible.

The value of this property is stored in view state.

This section contains two code examples. The first code example demonstrates how to use the ImageUrlField property to specify which attribute of an XML element to bind to the ImageUrl property of a TreeNode object to which the TreeNodeBinding object is applied. The second code example provides sample XML data for the first code example.

The following code example demonstrates how to use the ImageUrlField property to specify which attribute of an XML element to bind to the ImageUrl property of a TreeNode object to which the TreeNodeBinding object is applied. For this example to work correctly, you must copy the sample XML data, provided after this code example, to a file named Booklist.xml.

No code example is currently available or this language may not be supported.

The following code example provides sample XML data for the preceding example.

<Books Text="Books List">
    <Book Text="Book Title One"
        Value="1" 
        Image="Bookimage1.jpg"
        ImageToolTip="Book 1 Photo" 
        Nav="http://www.microsoft.com"
        Tip="Book Title 1">
        <Description Text="Book Description">
        </Description>
        <Price Value="$1.99">
        </Price>
        <Author Text="Author Name"
            Value="LastName" 
            Image="Authorimage1.jpg" 
            Nav="http://www.microsoft.com"
            Tip="Author Name">
        </Author>
    </Book>
    <Book Text="Book Title Two"
        Value="2" 
        Image="Bookimage2.jpg"
        ImageToolTip="Book 2 Photo" 
        Nav="http://www.microsoft.com"
        Tip="Click Me">
        <Description Text="Book Description">
        </Description>
        <Price Value="$2.99">
        </Price>
        <Author Text="Author Name"
            Value="LastName" 
            Image="Authorimage2.jpg" 
            Nav="http://www.microsoft.com"
            Tip="Author Name">
        </Author>
    </Book>
</Books>

.NET Framework
Available since 2.0
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