ViewCollection.Add Method
.NET Framework 3.0
Adds the specified View control to the collection.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Assembly: System.Web (in system.web.dll)
The Add method adds the new control to the end of an ordinal index array. The control can only be an instance of a View control.
To add a control to the collection at a specific index location, use the AddAt method.
The following code example demonstrates how to programmatically add View controls to a MultiView control. After each View control is created, the MultiView.Views.Add() syntax is used to add the View control to the ViewCollection collection of the MultiView control.
<%@ Page Language="VB"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>ViewCollection Class Example</title> <script runat="server"> Sub Index_Changed(ByVal Sender As Object, ByVal e As EventArgs) ' A MultiView was added to the page declaratively. ' Now add the View control programmatically. If SelectViewListBox.SelectedIndex >= 0 Then ' The user selected a view. ' Determine which view the user selected. Dim viewName As String = SelectViewListBox.SelectedItem.Text Dim myView as New View ' Use a helper function to create the view. myView = CreateView(viewName, "This is " + viewName) ' Add myView to the ViewCollection of the MultiView1 control. MultiView1.Views.Add(myView) ' Set myView as the active view. MultiView1.SetActiveView(myView) ' The Panel control was initially set to not visible. ' Set it to visible to add styles to the myView. Panel1.Visible=True Else Throw New Exception("You did not select a valid view.") End If End Sub ' A function to programmatically create a View control. Private Function CreateView(ByVal viewId As String, ByVal viewDescription As String) As View ' Create a View control Dim myView As New View myView.ID = viewId ' Create a Label control. Dim Label1 As New Label ' Set the text property for the label. Label1.Text = viewDescription ' Add the label to the controls collection of the view. myView.Controls.Add(Label1) Return myView End Function </script> </head> <body> <form id="Form1" runat="server"> <h3>ViewCollection Class Example</h3> <h4>Select a View to create and display in a MultiView control:</h4> <asp:ListBox ID="SelectViewListBox" AutoPostBack="True" Rows="1" SelectionMode="Single" OnSelectedIndexChanged="Index_Changed" runat="Server"> <asp:ListItem Value="0">View1</asp:ListItem> <asp:ListItem Value="1">View2</asp:ListItem> </asp:ListBox><br /><br /> <hr /><br /> <asp:Panel ID="Panel1" Height="75px" Width="100px" Backcolor="Aqua" BorderStyle="Double" Visible = "False" runat="Server"> <asp:MultiView ID="MultiView1" runat="Server"> </asp:MultiView> </asp:Panel> </form> </body> </html>
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