CatalogPartCollection.IndexOf(CatalogPart) 方法
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
返回集合中特定成员的位置。
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
参数
- catalogPart
- CatalogPart
作为集合成员的 CatalogPart。
返回
作为 CatalogPart 成员的 CatalogPartCollection。
示例
下面的代码示例演示如何使用IndexOf集合的 CatalogPartCollection 属性确定集合成员的位置。 有关运行示例所需的完整代码,请参阅类概述主题的示例 CatalogPartCollection 部分。
方法中的Button1_Click
代码创建名为 myParts
的新CatalogPartCollection对象。 方法使用 IndexOf 属性检索控件的位置 PageCatalogPart ,然后更改控件上的属性值。
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
在浏览器中加载页面后,可以通过在“显示模式”下拉列表控件中选择“目录”,将页面切换到目录模式。 单击“ 显示 CatalogPart 属性” 按钮将 CatalogPartCollection 访问对象并显示包含 CatalogPart 控件的某些属性。 单击 “页面目录” 链接以显示控件的内容 PageCatalogPart 。 请注意,它只有标题,没有边框,因为它ChromeType的属性值在使用 属性检索控件的代码IndexOf中更改为 TitleOnly 。
注解
IndexOf如果 Web 部件页上有多个CatalogPart控件,并且需要在集合中查找特定控件,则 方法非常有用。