ControlCollection.IndexOf(Control) 方法

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

检索集合中指定 Control 对象的索引。

public:
 virtual int IndexOf(System::Web::UI::Control ^ value);

public virtual int IndexOf (System.Web.UI.Control value);

abstract member IndexOf : System.Web.UI.Control -> int
override this.IndexOf : System.Web.UI.Control -> int

Public Overridable Function IndexOf (value As Control) As Integer

参数

value

Control

为其返回索引的 Control。

返回

Int32

指定服务器控件的索引。 如果服务器控件当前不是集合的成员，则返回 -1。

示例

下面的代码示例使用 IndexOf 方法在名为 myButton的控件myLiteralControl的集合中ControlCollection编写控件 的Button索引位置。

// Create a LiteralControl and use the Add method to add it
// to a button's ControlCollection, then use the AddAt method
// to add another LiteralControl to the collection at the
// index location of 1.
LiteralControl myLiteralControl = new LiteralControl("ChildControl1");
myButton.Controls.Add(myLiteralControl);
myButton.Controls.AddAt(1,new LiteralControl("ChildControl2"));
Response.Write("<b>ChildControl2 is added at index 1</b>");

// Get the Index location of the myLiteralControl LiteralControl
// and write it to the page.
Response.Write("<br /><b>Index of the ChildControl myLiteralControl is " +
    "</b>" + myButton.Controls.IndexOf(myLiteralControl));

' Create a LiteralControl and use the Add method to add it
' to a button's ControlCollection, then use the AddAt method
' to add another LiteralControl to the collection at the
' index location of 1.
Dim myLiteralControl As LiteralControl =  _
    new LiteralControl("ChildControl1")
myButton.Controls.Add(myLiteralControl)
myButton.Controls.AddAt(1,new LiteralControl("ChildControl2"))
Response.Write("<b>ChildControl2 is added at index 1</b>")

' Get the Index location of the myLiteralControl LiteralControl
' and write it to the page.
Response.Write("<br /><b>Index of the ChildControl myLiteralControl is </b>" & _
                 myButton.Controls.IndexOf(myLiteralControl))

注解

使用此方法确定对象中指定服务器控件的 ControlCollection 索引位置。

另请参阅

• Controls