Επεξεργασία

Κοινή χρήση μέσω

XmlDataSource.Data Property

  • Reference

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Gets or sets a block of XML data that the data source control binds to.

public:
 virtual property System::String ^ Data { System::String ^ get(); void set(System::String ^ value); };
[System.ComponentModel.TypeConverter("System.ComponentModel.MultilineStringConverter,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
public virtual string Data { get; set; }
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
[System.ComponentModel.TypeConverter("System.ComponentModel.MultilineStringConverter,System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
public virtual string Data { get; set; }
[<System.ComponentModel.TypeConverter("System.ComponentModel.MultilineStringConverter,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
member this.Data : string with get, set
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
[<System.ComponentModel.TypeConverter("System.ComponentModel.MultilineStringConverter,System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")>]
member this.Data : string with get, set
Public Overridable Property Data As String

Property Value

String

A string of inline XML data that the XmlDataSource control binds to. The default value is Empty.

Attributes
TypeConverterAttribute PersistenceModeAttribute

Exceptions

InvalidOperationException

The document is loading.

Examples

The following code example demonstrates how to use an XmlDataSource control to display inline XML data contained by the Data property with a TreeView control.

<%@ 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:xmldatasource
        id="XmlDataSource1"
        runat="server" >
        <data>
          <Books>
            <LanguageBooks>
              <Book Title="Pure JavaScript" Author="Wyke, Gilliam, and Ting"/>
              <Book Title="Effective C++ Second Edition" Author="Scott Meyers"/>
              <Book Title="Assembly Language Step-By-Step" Author="Jeff Duntemann"/>
              <Book Title="Oracle PL/SQL" Author="Steven Feuerstein"/>
            </LanguageBooks>
            <SecurityBooks>
              <Book Title="Counter Hack" Author="Ed Skoudis"/>
            </SecurityBooks>
          </Books>
        </data>
        </asp:xmldatasource>

      <!- TreeView uses hierachical data, so the
          XmlDataSource uses an XmlHierarchicalDataSourceView
          when a TreeView is bound to it. -->

      <asp:treeview
        id="TreeView1"
        runat="server"
        datasourceid="XmlDataSource1">
        <databindings>
          <asp:treenodebinding datamember="Book" textfield="Title"/>
        </databindings>
      </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:xmldatasource
        id="XmlDataSource1"
        runat="server" >
        <data>
          <Books>
            <LanguageBooks>
              <Book Title="Pure JavaScript" Author="Wyke, Gilliam, and Ting"/>
              <Book Title="Effective C++ Second Edition" Author="Scott Meyers"/>
              <Book Title="Assembly Language Step-By-Step" Author="Jeff Duntemann"/>
              <Book Title="Oracle PL/SQL" Author="Steven Feuerstein"/>
            </LanguageBooks>
            <SecurityBooks>
              <Book Title="Counter Hack" Author="Ed Skoudis"/>
            </SecurityBooks>
          </Books>
        </data>
        </asp:xmldatasource>

      <!- TreeView uses hierachical data, so the
          XmlDataSource uses an XmlHierarchicalDataSourceView
          when a TreeView is bound to it. -->

      <asp:treeview
        id="TreeView1"
        runat="server"
        datasourceid="XmlDataSource1">
        <databindings>
          <asp:treenodebinding datamember="Book" textfield="Title"/>
        </databindings>
      </asp:treeview>

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

Remarks

In declarative scenarios, the Data property is specified as a multiline inner property of the XmlDataSource object. An inner property is compatible with XML data, because it enables you to format the XML data in any way and ignore character padding issues, such as padding quote characters.

If both the DataFile and Data properties are set, the DataFile property takes precedence and the data in the XML file is used instead of the XML data specified in the Data property.

If you change the value of the Data property, the DataSourceChanged event is raised. If caching is enabled and you change the value of Data, the cache is invalidated.

Applies to

See also