PersistChildrenAttribute.IsDefaultAttribute Method
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Returns a value indicating whether the value of the current instance of the PersistChildrenAttribute class is the default value of the derived class.
public:
override bool IsDefaultAttribute();C#
public override bool IsDefaultAttribute();override this.IsDefaultAttribute : unit -> boolPublic Overrides Function IsDefaultAttribute () As Booleantrue if the value of the current instance of the PersistChildrenAttribute is the default instance; otherwise, false.
The following code example demonstrates how to use the IsDefaultAttribute method to determine if the current instance of the PersistChildrenAttribute class is the same as the default instance.
This code example is part of a larger example provided for the PersistChildrenAttribute class.
ASP.NET (C#)
<%@ Page Language="C#" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.CS.Controls" Namespace="PersistChildrenSamples" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
// Create two new employees and add them to the custom control.
Employee e1 = new Employee("Employee 1", "Title 1", "Alias 1");
Employee e2 = new Employee("Employee 2", "Title 2", "Alias 2");
CollectionPropertyControl1.Employees.Add(e1);
CollectionPropertyControl1.Employees.Add(e2);
// Verify attribute values.
PersistChildrenAttribute p =
(PersistChildrenAttribute)Attribute.GetCustomAttribute(typeof(CollectionPropertyControl),
typeof(PersistChildrenAttribute));
StringBuilder sb = new StringBuilder();
sb.Append("The Persist property is " + p.Persist.ToString() + "<br />");
sb.Append("The UseCustomPersistence property is " + p.UsesCustomPersistence.ToString() + "<br />");
sb.Append("The IsDefault method returns " + p.IsDefaultAttribute().ToString());
Message.Text = sb.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>PersistChildrenAttribute</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Message"
runat="server"/>
<AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
runat="server">
</AspSample:CollectionPropertyControl>
</div>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ Register TagPrefix="AspSample" Assembly="Samples.AspNet.VB.Controls" Namespace="PersistChildrenSampleVB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
' Create two new employees and add them to the custom control.
Dim e1 As New Employee("Employee 1", "Title 1", "Alias 1")
Dim e2 As New Employee("Employee 2", "Title 2", "Alias 2")
CollectionPropertyControl1.Employees.Add(e1)
CollectionPropertyControl1.Employees.Add(e2)
' Verify attribute values.
Dim p As PersistChildrenAttribute = _
Attribute.GetCustomAttribute(GetType(CollectionPropertyControl), _
GetType(PersistChildrenAttribute))
Dim sb As New StringBuilder()
sb.Append("The Persist property is " & p.Persist.ToString() & "<br />")
sb.Append("The UseCustomPersistence property is " & p.UsesCustomPersistence.ToString() & "<br />")
sb.Append("The IsDefault method returns " & p.IsDefaultAttribute().ToString())
Message.Text = sb.ToString()
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>PersistChildrenAttribute</title>
</head>
<body>
<form id="Form1" runat="server">
<div>
<asp:Label ID="Message"
runat="server"/>
<AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
runat="server">
</AspSample:CollectionPropertyControl>
</div>
</form>
</body>
</html>
| Proizvod | Verzije |
|---|---|
| .NET Framework | 1.1, 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 |
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