TreeNodeBinding.ImageToolTipField Property
Gets or sets the name of the field from the data source to bind to the ImageToolTip property of a TreeNode object to which the TreeNodeBinding object is applied.
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 Property ImageToolTipField As String
Property Value
Type: System.StringThe name of the field to bind to the ImageToolTip property of a TreeNode object to which the TreeNodeBinding object is applied. The default is an empty string (""), which indicates that the ImageToolTipField property is not set.
When the TreeView control is bound to a data source, use the ImageToolTipField property to specify the field name to bind to the ImageToolTip property of a TreeNode object. The text that you specify provides Assistive Technology devices with a description of the image that can be used to make the control more accessible.
This binding relationship affects all TreeNode objects to which the TreeNodeBinding object is applied. When an image is displayed next to a node, the ToolTip text is displayed when the mouse pointer is positioned over the image.
Note |
|---|
You can selectively override the ImageToolTipField property by setting the ImageToolTip property of each node directly. |
Instead of using the ImageToolTipField property to bind the ImageToolTip property of a TreeNode object to a field, you can set the ImageToolTip property to a fixed value by setting the ImageToolTip property.
Note |
|---|
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. |
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 ImageToolTipField property to specify which attribute of an XML element to bind to the ImageToolTip 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 example demonstrates how to use the ImageToolTipField property to specify which attribute of an XML element to bind to the ImageToolTip 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.
<%@ Page Language="VB" %> <!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>TreeViewBinding Example</title> </head> <body> <form id="form1" runat="server"> <h3>TreeViewBinding Example</h3> <!-- Set the TextField, ImageUrlField, NavigateUrlField, --> <!-- ValueField, and ToolTipField properties of a --> <!-- TreeNodeBinding object declaratively. --> <asp:TreeView id="BookTreeView" DataSourceID="BookXmlDataSource" Target="_blank" runat="server"> <DataBindings> <asp:TreeNodeBinding DataMember="Books" Depth="0" TextField="Text"/> <asp:TreeNodeBinding DataMember="Book" Depth="1" TextField="Text" ImageUrlField="Image" ImageToolTipField="ImageToolTip" NavigateUrlField="Nav" ValueField="Value" ToolTipField="Tip"/> <asp:TreeNodeBinding DataMember="Description" Depth="2" TextField="Text"/> <asp:TreeNodeBinding DataMember="Price" Depth="2" TextField="Value"/> </DataBindings> </asp:TreeView> <asp:XmlDataSource id="BookXmlDataSource" DataFile="Booklist.xml" runat="server"> </asp:XmlDataSource> </form> </body> </html>
The following code example provides sample XML data for the preceding code 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>
Available since 2.0
TreeView
TreeNode
DataBindings
DataMember
Depth
TreeNode.ImageUrl
TreeNodeBinding.ImageUrl
ImageUrlField
ImageToolTip
TreeNode.NavigateUrl
TreeNodeBinding.NavigateUrl
NavigateUrlField
TreeNode.Text
TreeNodeBinding.Text
TextField
TreeNode.ToolTip
TreeNodeBinding.ToolTip
TreeNode.Value
TreeNodeBinding.Value
ValueField
TreeNodeBinding Class
System.Web.UI.WebControls Namespace
