通过

EditorPartCollection.Contains(EditorPart) 方法

  • 参考

定义

命名空间:
System.Web.UI.WebControls.WebParts
程序集:
System.Web.dll

返回一个值，该值指示集合中是否存在特定控件。

public:
 bool Contains(System::Web::UI::WebControls::WebParts::EditorPart ^ editorPart);
public bool Contains (System.Web.UI.WebControls.WebParts.EditorPart editorPart);
member this.Contains : System.Web.UI.WebControls.WebParts.EditorPart -> bool
Public Function Contains (editorPart As EditorPart) As Boolean

参数

editorPart
EditorPart

要测试其是否为集合成员的 EditorPart。

返回

Boolean

一个布尔值，指示集合中是否存在 EditorPart。

示例

下面的代码示例演示如何确定特定 EditorPart 控件是否位于 对象中 EditorPartCollection 。 有关运行示例所需的完整代码，请参阅类概述的 EditorPartCollection “示例”部分。

事件中的代码在 Button1_Click 添加其他控件时不会将 LayoutEditorPart1 控件添加到 EditorPartCollection 对象。 若要确认 LayoutEditorPart1 控件不在集合中，代码使用 Contains 方法。

<!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 Button1_Click(object sender, EventArgs e)
  {
    ArrayList list = new ArrayList(2);
    list.Add(AppearanceEditorPart1);
    list.Add(PropertyGridEditorPart1);
    // Pass an ICollection object to the constructor.
    EditorPartCollection myParts = new EditorPartCollection(list);
    foreach (EditorPart editor in myParts)
    {
      editor.BackColor = System.Drawing.Color.LightBlue;
      editor.Description = "My " + editor.DisplayTitle + " editor.";
    }

    // Use the IndexOf property to locate an EditorPart control.
    int propertyGridPart = myParts.IndexOf(PropertyGridEditorPart1);
    myParts[propertyGridPart].ChromeType = PartChromeType.TitleOnly;

    // Use the Contains method to see if an EditorPart exists.
    if(!myParts.Contains(LayoutEditorPart1))
      LayoutEditorPart1.BackColor = System.Drawing.Color.LightYellow;
    
    // Use the CopyTo method to create an array of EditorParts.
    EditorPart[] partArray = new EditorPart[3];
    partArray[0] = LayoutEditorPart1;
    myParts.CopyTo(partArray,1);
    Label1.Text = "<h3>EditorParts in Custom Array</h3>";
    foreach (EditorPart ePart in partArray)
    {
      Label1.Text += ePart.Title + "<br />";
    }

  }

</script>

<!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 Button1_Click(ByVal sender As Object, _
    ByVal e As EventArgs)
    
    Dim list As New ArrayList(2)
    list.Add(AppearanceEditorPart1)
    list.Add(PropertyGridEditorPart1)
    ' Pass an ICollection object to the constructor.
    Dim myParts As New EditorPartCollection(list)
    Dim editor As EditorPart
    For Each editor In myParts
      editor.BackColor = System.Drawing.Color.LightBlue
      editor.Description = "My " + editor.DisplayTitle + " editor."
    Next editor
    
    ' Use the IndexOf property to locate an EditorPart control.
    Dim propertyGridPart As Integer = _
      myParts.IndexOf(PropertyGridEditorPart1)
    myParts(propertyGridPart).ChromeType = PartChromeType.TitleOnly
    
    ' Use the Contains method to see if an EditorPart exists.
    If Not myParts.Contains(LayoutEditorPart1) Then
      LayoutEditorPart1.BackColor = System.Drawing.Color.LightYellow
    End If
    
    ' Use the CopyTo method to create an array of EditorParts.
    Dim partArray(2) As EditorPart
    partArray(0) = LayoutEditorPart1
    myParts.CopyTo(partArray, 1)
    Label1.Text = "<h3>EditorParts in Custom Array</h3>"
    Dim ePart As EditorPart
    For Each ePart In partArray
      Label1.Text += ePart.Title + "<br />"
    Next ePart

  End Sub

</script>

在浏览器中加载页面时，可以通过在“显示模式”下拉列表控件中选择“编辑”，将页面切换到编辑模式。 可以单击 (控件标题栏中 TextDisplayWebPart 的向下箭头) 谓词菜单，然后单击“ 编辑 ”编辑控件。 当编辑用户界面 (UI) 可见时，可以看到所有 EditorPart 控件。 如果单击“ 创建编辑器”“PartCollection ”按钮，你会注意到控件的背景色 LayoutEditorPart1 与其他控件不同，因为它不是对象的一部分 EditorPartCollection 。

注解

方法Contains确定对象中EditorPartCollection是否已存在特定EditorPart控件。

适用于

另请参阅