CatalogPartCollection.IndexOf(CatalogPart) 方法

定義

命名空間:

System.Web.UI.WebControls.WebParts

組件:

System.Web.dll

傳回集合特定成員的位置。

public:
 int IndexOf(System::Web::UI::WebControls::WebParts::CatalogPart ^ catalogPart);

public int IndexOf (System.Web.UI.WebControls.WebParts.CatalogPart catalogPart);

member this.IndexOf : System.Web.UI.WebControls.WebParts.CatalogPart -> int

Public Function IndexOf (catalogPart As CatalogPart) As Integer

參數

catalogPart

CatalogPart

CatalogPart，為集合成員。

傳回

Int32

CatalogPart，CatalogPartCollection 的成員。

範例

下列程式代碼範例示範如何使用其 IndexOf 屬性來判斷集合成員CatalogPartCollection的位置。 如需執行範例所需的完整程式碼，請參閱類別概觀主題的 CatalogPartCollection 範例一節。

方法中的Button1_Click程式代碼會建立名為 myParts的新CatalogPartCollection物件。 方法會 IndexOf 使用 屬性來擷取控件的位置 PageCatalogPart ，然後變更 控件上的屬性值。

protected void Button1_Click(object sender, EventArgs e)
{
  ArrayList list = new ArrayList(2);
  list.Add(PageCatalogPart1);
  list.Add(DeclarativeCatalogPart1);
  // Pass an ICollection object to the constructor.
  CatalogPartCollection myParts = new CatalogPartCollection(list);
  foreach (CatalogPart catalog in myParts)
  {
    catalog.Description = "My " + catalog.DisplayTitle;
  }

  // Use the IndexOf property to locate a CatalogPart control.
  int PageCatalogPartIndex = myParts.IndexOf(PageCatalogPart1);
  myParts[PageCatalogPartIndex].ChromeType = PartChromeType.TitleOnly;

  // Use the Contains method to see if a CatalogPart control exists.
  if (myParts.Contains(PageCatalogPart1))
  {
    WebPart closedWebPart = null;
    WebPartDescriptionCollection descriptions = PageCatalogPart1.GetAvailableWebPartDescriptions();
    if (descriptions.Count > 0)
    {
      closedWebPart = PageCatalogPart1.GetWebPart(descriptions[0]);
      closedWebPart.AllowClose = false;
    }
  }
  
  // Use indexers to display the details of the CatalogPart controls.
  Label1.Text = String.Empty;
  Label1.Text =
    "<h3>PageCatalogPart Details</h3>" +
    "ID: " + myParts[0].ID + "<br />" +
    "Count: " + myParts[0].GetAvailableWebPartDescriptions().Count;
  Label1.Text += 
    "<h3>DeclarativeCatalogPart Details</h3>" +
    "ID: " + myParts["DeclarativeCatalogPart1"].ID + "<br />" +
    "Count: " + myParts["DeclarativeCatalogPart1"].GetAvailableWebPartDescriptions().Count;
}

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) 
    Dim list As New ArrayList(2)
    list.Add(PageCatalogPart1)
    list.Add(DeclarativeCatalogPart1)
    ' Pass an ICollection object to the constructor.
    Dim myParts As New CatalogPartCollection(list)
    Dim catalog As CatalogPart
    For Each catalog In  myParts
        catalog.Description = "My " + catalog.DisplayTitle
    Next catalog
    
    ' Use the IndexOf property to locate a CatalogPart control.
    Dim PageCatalogPartIndex As Integer = _
      myParts.IndexOf(PageCatalogPart1)
    myParts(PageCatalogPartIndex).ChromeType = PartChromeType.TitleOnly
    
    ' Use the Contains method to see if a CatalogPart control exists.
    If myParts.Contains(PageCatalogPart1) Then
        Dim closedWebPart As WebPart = Nothing
        Dim descriptions As WebPartDescriptionCollection = _
          PageCatalogPart1.GetAvailableWebPartDescriptions()
        If descriptions.Count > 0 Then
            closedWebPart = PageCatalogPart1.GetWebPart(descriptions(0))
            closedWebPart.AllowClose = False
        End If
    End If
    
    ' Use indexers to display the details of the CatalogPart controls.
    Label1.Text = String.Empty
    Label1.Text = _
      "<h3>PageCatalogPart Details</h3>" & _
      "ID: " & myParts(0).ID + "<br />" & _
      "Count: " & myParts(0).GetAvailableWebPartDescriptions().Count
    Label1.Text += _
      "<h3>DeclarativeCatalogPart Details</h3>" & _
      "ID: " & myParts("DeclarativeCatalogPart1").ID & "<br />" & _
      "Count: " & myParts("DeclarativeCatalogPart1") _
        .GetAvailableWebPartDescriptions().Count

End Sub 

在瀏覽器中載入頁面之後，您可以在 [顯示模式] 下拉式清單控件中選取 [目錄]，將頁面切換為目錄模式。 按兩下 [ 顯示目錄元件屬性 ] 按鈕會存取物件， CatalogPartCollection 並顯示自主 CatalogPart 控制件的特定屬性。 按兩下 [頁面目錄 ] 連結以顯示控制元件的內容 PageCatalogPart 。 請注意，它只有標題且沒有框線，因為其 ChromeType 屬性值已變更為 TitleOnly 使用 IndexOf 屬性來擷取控件的程式代碼中。

備註

如果您在網頁元件頁面上有多個CatalogPart控件，而且您需要在集合中尋找特定控件，此方法IndexOf會很有用。

另請參閱

• IndexOf(Object)
• ASP.NET 網頁元件控制件