SiteMapDataSource Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides a data source control that Web server controls and other controls can use to bind to hierarchical site map data.
public ref class SiteMapDataSource : System::Web::UI::HierarchicalDataSourceControl, System::ComponentModel::IListSource, System::Web::UI::IDataSource[System.Drawing.ToolboxBitmap(typeof(System.Web.UI.WebControls.SiteMapDataSource))]
public class SiteMapDataSource : System.Web.UI.HierarchicalDataSourceControl, System.ComponentModel.IListSource, System.Web.UI.IDataSource[<System.Drawing.ToolboxBitmap(typeof(System.Web.UI.WebControls.SiteMapDataSource))>]
type SiteMapDataSource = class
inherit HierarchicalDataSourceControl
interface IDataSource
interface IListSourcePublic Class SiteMapDataSource
Inherits HierarchicalDataSourceControl
Implements IDataSource, IListSource- Inheritance
- Attributes
- Implements
Examples
The following code example demonstrates how to declaratively bind a TreeView control to a site map using a SiteMapDataSource control. The site map data is retrieved beginning at the root node level.
<%@ 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>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
<asp:SiteMapDataSource
id="SiteMapDataSource1"
runat="server" />
<asp:TreeView
id="TreeView1"
runat="server"
DataSourceID="SiteMapDataSource1">
</asp:TreeView>
</form>
</body>
</html>
<%@ 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>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
<asp:SiteMapDataSource
id="SiteMapDataSource1"
runat="server" />
<asp:TreeView
id="TreeView1"
runat="server"
DataSourceID="SiteMapDataSource1">
</asp:TreeView>
</form>
</body>
</html>
Remarks
In this topic:
Introduction
The SiteMapDataSource control is a data source to the site map data that is stored by the site map providers that are configured for your site. The SiteMapDataSource enables Web server controls that are not specifically site navigation controls, such as the TreeView, Menu, and DropDownList controls, to bind to hierarchical site map data. You can use these Web server controls to display a site map as a table of contents or to actively navigate a site. Alternatively, you can use the SiteMapPath control, which is designed specifically as a site navigation control and therefore does not need an instance of the SiteMapDataSource control.
Specifying the Starting Node
The SiteMapDataSource binds to site map data and presents its view based on a specified starting node in the site map hierarchy. By default, it is the root node of the hierarchy but it can also be any node within the hierarchy. The starting node is identified by the values of several SiteMapDataSource properties as follows:
| Starting Node | Property Values |
|---|---|
| The root node of the hierarchy (the default setting). | The StartFromCurrentNode is false.The StartingNodeUrl is not set. |
| The node that represents the currently viewed page. | The StartFromCurrentNode is true.The StartingNodeUrl is not set. |
| A specific node of the hierarchy. | The StartFromCurrentNode is false.The StartingNodeUrl is set. |
If the StartingNodeOffset property is set to a value other than 0, it affects the starting node and with it the site map data hierarchy that is exposed by the SiteMapDataSource control. The negative or positive integer value of the StartingNodeOffset identifies the number of levels up or down the site map hierarchy from the starting node that is identified by the StartFromCurrentNode and StartingNodeUrl properties to offset the starting node of the subtree that is exposed by data source control.
If the StartingNodeOffset property is set to a negative number -n, the starting node of the subtree that is exposed by the data source control is the ancestor node n hierarchical levels above the identified starting node. If the value n is greater than the number of ancestor levels in the hierarchical tree, the starting node of the subtree is the root node of the site map hierarchy.
If the StartingNodeOffset property is set to a positive number +n, the starting node of the subtree that is exposed is a child node n levels below the identified starting node. Because more than one branch of child nodes might exist in the hierarchy, the SiteMapDataSource attempts to resolve a child node directly on the path between the identified starting node and the node that represents the currently requested page, if possible. If the node that represents the currently requested page is not in the subtree of the identified starting node, the value of the StartingNodeOffset property is ignored. If the node that represents the currently requested page is less than n levels below the identified starting node, the currently requested page node is used as the starting node.
Retrieving Site Map Data
Site map data is retrieved from a SiteMapProvider object, such as XmlSiteMapProvider, which is the default site map provider for ASP.NET. You can specify any provider that is configured for your site to provide the site map data to the SiteMapDataSource and can obtain the list of available providers by accessing the SiteMap.Providers collection.
Like all data source controls, every instance of a SiteMapDataSource is associated with a single helper object, known as a data source view. The SiteMapDataSourceView is a view on the site map data, according to the properties of the data source, and is retrieved by calling the GetHierarchicalView method. The SiteMapDataSourceView maintains the SiteMapNodeCollection object that the controls bind to.
By default, the starting node is the root node of the hierarchy, but you can set the starting node to any node. The starting point can be a node that is relative to the current position in the site map or to an absolute position. You can specify the starting node by setting the StartingNodeUrl property.
The SiteMapDataSource is specialized for navigation data, and does not support common data source operations such as sorting, filtering, paging, caching, or data record operations such as updates, insertions or deletions.
Declarative Syntax
<asp:SiteMapDataSource
EnableTheming="True|False"
EnableViewState="True|False"
ID="string"
OnDataBinding="DataBinding event handler"
OnDisposed="Disposed event handler"
OnInit="Init event handler"
OnLoad="Load event handler"
OnPreRender="PreRender event handler"
OnUnload="Unload event handler"
runat="server"
ShowStartingNode="True|False"
SiteMapProvider="string"
SkinID="string"
StartFromCurrentNode="True|False"
StartingNodeOffset="integer"
StartingNodeUrl="uri"
Visible="True|False"
/>
Constructors
| SiteMapDataSource() |
Initializes a new instance of the SiteMapDataSource class. |
Properties
| Adapter |
Gets the browser-specific adapter for the control. (Inherited from Control) |
| AppRelativeTemplateSourceDirectory |
Gets or sets the application-relative virtual directory of the Page or UserControl object that contains this control. (Inherited from Control) |
| BindingContainer |
Gets the control that contains this control's data binding. (Inherited from Control) |
| ChildControlsCreated |
Gets a value that indicates whether the server control's child controls have been created. (Inherited from Control) |
| ClientID |
Gets the server control identifier generated by ASP.NET. (Inherited from HierarchicalDataSourceControl) |
| ClientIDMode |
This property is not used for data source controls. (Inherited from HierarchicalDataSourceControl) |
| ClientIDSeparator |
Gets a character value representing the separator character used in the ClientID property. (Inherited from Control) |
| ContainsListCollection |
Gets a value indicating whether the data source control contains a collection of data source view objects. |
| Context |
Gets the HttpContext object associated with the server control for the current Web request. (Inherited from Control) |
| Controls |
Gets a ControlCollection object that represents the child controls for a specified server control in the UI hierarchy. (Inherited from HierarchicalDataSourceControl) |
| DataItemContainer |
Gets a reference to the naming container if the naming container implements IDataItemContainer. (Inherited from Control) |
| DataKeysContainer |
Gets a reference to the naming container if the naming container implements IDataKeysControl. (Inherited from Control) |
| DesignMode |
Gets a value indicating whether a control is being used on a design surface. (Inherited from Control) |
| EnableTheming |
Gets a value indicating whether this control supports themes. (Inherited from HierarchicalDataSourceControl) |
| EnableViewState |
Gets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client. (Inherited from Control) |
| Events |
Gets a list of event handler delegates for the control. This property is read-only. (Inherited from Control) |
| HasChildViewState |
Gets a value indicating whether the current server control's child controls have any saved view-state settings. (Inherited from Control) |
| ID |
Gets or sets the programmatic identifier assigned to the server control. (Inherited from Control) |
| IdSeparator |
Gets the character used to separate control identifiers. (Inherited from Control) |
| IsChildControlStateCleared |
Gets a value indicating whether controls contained within this control have control state. (Inherited from Control) |
| IsTrackingViewState |
Gets a value that indicates whether the server control is saving changes to its view state. (Inherited from Control) |
| IsViewStateEnabled |
Gets a value indicating whether view state is enabled for this control. (Inherited from Control) |
| LoadViewStateByID |
Gets a value indicating whether the control participates in loading its view state by ID instead of index. (Inherited from Control) |
| NamingContainer |
Gets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same ID property value. (Inherited from Control) |
| Page |
Gets a reference to the Page instance that contains the server control. (Inherited from Control) |
| Parent |
Gets a reference to the server control's parent control in the page control hierarchy. (Inherited from Control) |
| Provider |
Gets or sets a SiteMapProvider object that is associated with the data source control. |
| RenderingCompatibility |
Gets a value that specifies the ASP.NET version that rendered HTML will be compatible with. (Inherited from Control) |
| ShowStartingNode |
Gets or sets a value indicating whether the starting node is retrieved and displayed. |
| Site |
Gets information about the container that hosts the current control when rendered on a design surface. (Inherited from Control) |
| SiteMapProvider |
Gets or sets the name of the site map provider that the data source binds to. |
| SkinID |
Gets or sets the skin to apply to the HierarchicalDataSourceControl control. (Inherited from HierarchicalDataSourceControl) |
| StartFromCurrentNode |
Gets or sets a value indicating whether the site map node tree is retrieved using the node that represents the current page. |
| StartingNodeOffset |
Gets or sets a positive or negative integer offset from the starting node that determines the root hierarchy that is exposed by the data source control. |
| StartingNodeUrl |
Gets or sets a node in the site map that the data source then uses as a reference point to retrieve nodes from a hierarchical site map. |
| TemplateControl |
Gets or sets a reference to the template that contains this control. (Inherited from Control) |
| TemplateSourceDirectory |
Gets the virtual directory of the Page or UserControl that contains the current server control. (Inherited from Control) |
| UniqueID |
Gets the unique, hierarchically qualified identifier for the server control. (Inherited from Control) |
| ValidateRequestMode |
Gets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values. (Inherited from Control) |
| ViewState |
Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page. (Inherited from Control) |
| ViewStateIgnoresCase |
Gets a value that indicates whether the StateBag object is case-insensitive. (Inherited from Control) |
| ViewStateMode |
Gets or sets the view-state mode of this control. (Inherited from Control) |
| Visible |
Gets or sets a value indicating whether the control is visually displayed. (Inherited from HierarchicalDataSourceControl) |
Methods
| AddedControl(Control, Int32) |
Called after a child control is added to the Controls collection of the Control object. (Inherited from Control) |
| AddParsedSubObject(Object) |
Notifies the server control that an element, either XML or HTML, was parsed, and adds the element to the server control's ControlCollection object. (Inherited from Control) |
| ApplyStyleSheetSkin(Page) |
Applies the style properties that are defined in the page style sheet to the control. (Inherited from HierarchicalDataSourceControl) |
| BeginRenderTracing(TextWriter, Object) |
Begins design-time tracing of rendering data. (Inherited from Control) |
| BuildProfileTree(String, Boolean) |
Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page. (Inherited from Control) |
| ClearCachedClientID() |
Sets the cached ClientID value to |
| ClearChildControlState() |
Deletes the control-state information for the server control's child controls. (Inherited from Control) |
| ClearChildState() |
Deletes the view-state and control-state information for all the server control's child controls. (Inherited from Control) |
| ClearChildViewState() |
Deletes the view-state information for all the server control's child controls. (Inherited from Control) |
| ClearEffectiveClientIDMode() |
Sets the ClientIDMode property of the current control instance and of any child controls to Inherit. (Inherited from Control) |
| CreateChildControls() |
Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering. (Inherited from Control) |
| CreateControlCollection() |
Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control. (Inherited from HierarchicalDataSourceControl) |
| DataBind() |
Binds a data source to the invoked server control and all its child controls. (Inherited from Control) |
| DataBind(Boolean) |
Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event. (Inherited from Control) |
| DataBindChildren() |
Binds a data source to the server control's child controls. (Inherited from Control) |
| Dispose() |
Enables a server control to perform final clean up before it is released from memory. (Inherited from Control) |
| EndRenderTracing(TextWriter, Object) |
Ends design-time tracing of rendering data. (Inherited from Control) |
| EnsureChildControls() |
Determines whether the server control contains child controls. If it does not, it creates child controls. (Inherited from Control) |
| EnsureID() |
Creates an identifier for controls that do not have an identifier assigned. (Inherited from Control) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| FindControl(String, Int32) |
Searches the current naming container for a server control with the specified |
| FindControl(String) |
Searches the current naming container for a server control with the specified |
| Focus() |
Sets input focus to the control. (Inherited from HierarchicalDataSourceControl) |
| GetDesignModeState() |
Gets design-time data for a control. (Inherited from Control) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetHierarchicalView(String) |
Retrieves a single view on the site map data for the SiteMapProvider object according to the starting node and other properties of the data source. |
| GetList() |
Retrieves a list of data source controls that can be used as sources of lists of data. |
| GetRouteUrl(Object) |
Gets the URL that corresponds to a set of route parameters. (Inherited from Control) |
| GetRouteUrl(RouteValueDictionary) |
Gets the URL that corresponds to a set of route parameters. (Inherited from Control) |
| GetRouteUrl(String, Object) |
Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control) |
| GetRouteUrl(String, RouteValueDictionary) |
Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| GetUniqueIDRelativeTo(Control) |
Returns the prefixed portion of the UniqueID property of the specified control. (Inherited from Control) |
| GetView(String) |
Retrieves a named view on the site map data of the site map provider according to the starting node and other properties of the data source. |
| GetViewNames() |
Retrieves a collection of named views for the data source control. |
| HasControls() |
Determines if the server control contains any child controls. (Inherited from HierarchicalDataSourceControl) |
| HasEvents() |
Returns a value indicating whether events are registered for the control or any child controls. (Inherited from Control) |
| IsLiteralContent() |
Determines if the server control holds only literal content. (Inherited from Control) |
| LoadControlState(Object) |
Restores control-state information from a previous page request that was saved by the SaveControlState() method. (Inherited from Control) |
| LoadViewState(Object) |
Restores view-state information from a previous page request that was saved by the SaveViewState() method. (Inherited from Control) |
| MapPathSecure(String) |
Retrieves the physical path that a virtual path, either absolute or relative, maps to. (Inherited from Control) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| OnBubbleEvent(Object, EventArgs) |
Determines whether the event for the server control is passed up the page's UI server control hierarchy. (Inherited from Control) |
| OnDataBinding(EventArgs) |
Raises the DataBinding event. (Inherited from Control) |
| OnDataSourceChanged(EventArgs) |
Raises the DataSourceChanged event. (Inherited from HierarchicalDataSourceControl) |
| OnInit(EventArgs) |
Raises the Init event. (Inherited from Control) |
| OnLoad(EventArgs) |
Raises the Load event. (Inherited from Control) |
| OnPreRender(EventArgs) |
Raises the PreRender event. (Inherited from Control) |
| OnUnload(EventArgs) |
Raises the Unload event. (Inherited from Control) |
| OpenFile(String) |
Gets a Stream used to read a file. (Inherited from Control) |
| RaiseBubbleEvent(Object, EventArgs) |
Assigns any sources of the event and its information to the control's parent. (Inherited from Control) |
| RemovedControl(Control) |
Called after a child control is removed from the Controls collection of the Control object. (Inherited from Control) |
| Render(HtmlTextWriter) |
Sends server control content to a provided HtmlTextWriter object, which writes the content to be rendered on the client. (Inherited from Control) |
| RenderChildren(HtmlTextWriter) |
Outputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client. (Inherited from Control) |
| RenderControl(HtmlTextWriter, ControlAdapter) |
Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object. (Inherited from Control) |
| RenderControl(HtmlTextWriter) |
Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled. (Inherited from HierarchicalDataSourceControl) |
| ResolveAdapter() |
Gets the control adapter responsible for rendering the specified control. (Inherited from Control) |
| ResolveClientUrl(String) |
Gets a URL that can be used by the browser. (Inherited from Control) |
| ResolveUrl(String) |
Converts a URL into one that is usable on the requesting client. (Inherited from Control) |
| SaveControlState() |
Saves any server control state changes that have occurred since the time the page was posted back to the server. (Inherited from Control) |
| SaveViewState() |
Saves any server control view-state changes that have occurred since the time the page was posted back to the server. (Inherited from Control) |
| SetDesignModeState(IDictionary) |
Sets design-time data for a control. (Inherited from Control) |
| SetRenderMethodDelegate(RenderMethod) |
Assigns an event handler delegate to render the server control and its content into its parent control. (Inherited from Control) |
| SetTraceData(Object, Object, Object) |
Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value. (Inherited from Control) |
| SetTraceData(Object, Object) |
Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value. (Inherited from Control) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
| TrackViewState() |
Causes tracking of view-state changes to the server control so they can be stored in the server control's StateBag object. This object is accessible through the ViewState property. (Inherited from Control) |
Events
| DataBinding |
Occurs when the server control binds to a data source. (Inherited from Control) |
| Disposed |
Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested. (Inherited from Control) |
| Init |
Occurs when the server control is initialized, which is the first step in its lifecycle. (Inherited from Control) |
| Load |
Occurs when the server control is loaded into the Page object. (Inherited from Control) |
| PreRender |
Occurs after the Control object is loaded but prior to rendering. (Inherited from Control) |
| Unload |
Occurs when the server control is unloaded from memory. (Inherited from Control) |
Explicit Interface Implementations
| IControlBuilderAccessor.ControlBuilder |
For a description of this member, see ControlBuilder. (Inherited from Control) |
| IControlDesignerAccessor.GetDesignModeState() |
For a description of this member, see GetDesignModeState(). (Inherited from Control) |
| IControlDesignerAccessor.SetDesignModeState(IDictionary) |
For a description of this member, see SetDesignModeState(IDictionary). (Inherited from Control) |
| IControlDesignerAccessor.SetOwnerControl(Control) |
For a description of this member, see SetOwnerControl(Control). (Inherited from Control) |
| IControlDesignerAccessor.UserData |
For a description of this member, see UserData. (Inherited from Control) |
| IDataBindingsAccessor.DataBindings |
For a description of this member, see DataBindings. (Inherited from Control) |
| IDataBindingsAccessor.HasDataBindings |
For a description of this member, see HasDataBindings. (Inherited from Control) |
| IDataSource.DataSourceChanged |
Occurs when a data source control has changed in some way that affects data-bound controls. |
| IDataSource.GetView(String) |
For a description of this member, see GetView(String). |
| IDataSource.GetViewNames() |
For a description of this member, see GetViewNames(). |
| IExpressionsAccessor.Expressions |
For a description of this member, see Expressions. (Inherited from Control) |
| IExpressionsAccessor.HasExpressions |
For a description of this member, see HasExpressions. (Inherited from Control) |
| IHierarchicalDataSource.DataSourceChanged |
Occurs when the HierarchicalDataSourceControl has changed in some way that affects data-bound controls. (Inherited from HierarchicalDataSourceControl) |
| IHierarchicalDataSource.GetHierarchicalView(String) |
Gets the view helper object for the IHierarchicalDataSource interface for the specified path. (Inherited from HierarchicalDataSourceControl) |
| IListSource.ContainsListCollection |
Gets a value that indicates whether the collection is a collection of IList objects. |
| IListSource.GetList() |
For a description of this member, see GetList(). |
| IParserAccessor.AddParsedSubObject(Object) |
For a description of this member, see AddParsedSubObject(Object). (Inherited from Control) |
Extension Methods
| FindDataSourceControl(Control) |
Returns the data source that is associated with the data control for the specified control. |
| FindFieldTemplate(Control, String) |
Returns the field template for the specified column in the specified control's naming container. |
| FindMetaTable(Control) |
Returns the metatable object for the containing data control. |
| GetDefaultValues(IDataSource) |
Gets the collection of the default values for the specified data source. |
| GetMetaTable(IDataSource) |
Gets the metadata for a table in the specified data source object. |
| TryGetMetaTable(IDataSource, MetaTable) |
Determines whether table metadata is available. |
