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TemplateControl.XPathSelect Method

  • Reference

Definition

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

Provides run-time data binding against XML-based data and returns a node collection that implements the IEnumerable interface.

Overloads

XPathSelect(String, IXmlNamespaceResolver)

Evaluates an XPath data-binding expression using the specified prefix and namespace mappings for namespace resolution and returns a node collection that implements the IEnumerable interface.
XPathSelect(String)

Evaluates an XPath data-binding expression and returns a node collection that implements the IEnumerable interface.

XPathSelect(String, IXmlNamespaceResolver)

Evaluates an XPath data-binding expression using the specified prefix and namespace mappings for namespace resolution and returns a node collection that implements the IEnumerable interface.

C# 
protected internal System.Collections.IEnumerable XPathSelect(string xPathExpression, System.Xml.IXmlNamespaceResolver resolver);

Parameters

xPathExpression
String

The XPath expression to evaluate. For more information, see XPathBinder.

resolver
IXmlNamespaceResolver

A set of prefix and namespace mappings used for namespace resolution.

Returns

IEnumerable

An IEnumerable node list.

Remarks

The XPathSelect method calls the XPathBinder.Select method using the GetDataItem method to resolve the IXPathNavigable object reference that the expression is evaluated against.

See also

Applies to

.NET Framework 4.8.1 и друге верзије
Производ Верзије
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

XPathSelect(String)

Evaluates an XPath data-binding expression and returns a node collection that implements the IEnumerable interface.

C# 
protected internal System.Collections.IEnumerable XPathSelect(string xPathExpression);

Parameters

xPathExpression
String

The XPath expression to evaluate. For more information, see XPathBinder.

Returns

IEnumerable

An IEnumerable node list.

Examples

The following code example demonstrates how to use the XPathSelect method in a Repeater control.

ASP.NET (C#) 
<%@ 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>TemplateControl XPath and XPathSelect Example</title>
</head>
<body>
    <h3>TemplateControl XPath Example</h3>
    <form id="form1" runat="server">
    <div>
      <asp:XmlDataSource
        id="XmlDataSource1" 
        runat="server"
        XPath="contacts" 
        DataFile="contacts.xml" />    
      <asp:FormView 
        id="FormView1" 
        runat="server" 
        DataSourceID="XmlDataSource1">
        <ItemTemplate>
          <hr />
          <asp:Repeater 
            id="Repeater1" 
            runat="server" 
            DataSource='<%# XPathSelect("contact") %>' >
            <ItemTemplate>
              Name: <%# XPath("name") %> <br />
              Note: <%# XPath("note") %> <br />
              <hr />
            </ItemTemplate>
          </asp:Repeater>
        </ItemTemplate>
      </asp:FormView>
    </div>
    </form>
</body>
</html>

The following test XML data can be used in the preceding code example.

<contacts>  
   <contact id="1">  
     <name>contact name 1</name>  
     <note>contact note 1</note>  
   </contact>  
   <contact id="2">  
     <name>contact name 2</name>  
     <note>contact note 2</note>  
   </contact>  
</contacts>

Remarks

The XPathSelect method calls the XPathBinder.Select method using the GetDataItem method to resolve the IXPathNavigable object reference that the expression is evaluated against.

See also

Applies to

.NET Framework 4.8.1 и друге верзије
Производ Верзије
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1