PersistChildrenAttribute.Persist プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

PersistChildrenAttribute.Persist プロパティ

デザイン時に、入れ子になった内容を入れ子になったコントロールとして保持するかどうかを示す値を取得します。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public ReadOnly Property
 Persist As Boolean

Visual Basic (使用法)

Dim instance As PersistChildrenAttribute
Dim value As Boolean

value = instance.Persist

public bool Persist { get;
 }

C++

public:
property bool Persist {
    bool get ();
}

/** @property */
public boolean get_Persist ()

JScript

public function get Persist
 () : boolean

プロパティ値
入れ子になった内容を入れ子になったコントロールとして保持する場合は true。それ以外の場合は false。既定値は true です。

使用例

Persist プロパティの値を取得する方法を次のコード例に示します。

このコード例は、PersistChildrenAttribute クラスのトピックで取り上げているコード例の一部分です。

Visual Basic

<%@ 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  >
<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>

<%@ 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  >
<head runat="server">
    <title>PersistChildrenAttribute</title>
</head>
<body>
    <form runat="server">
    <div>
      <asp:Label ID="Message"
                 runat="server"/>
      <AspSample:CollectionPropertyControl id="CollectionPropertyControl1"
 
                                           runat="server">
      </AspSample:CollectionPropertyControl>
    </div>
    </form>
</body>
</html>