WebPartManager.AddWebPart(WebPart, WebPartZoneBase, Int32) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides the standard programmatic method for adding WebPart controls to a Web page.
public:
System::Web::UI::WebControls::WebParts::WebPart ^ AddWebPart(System::Web::UI::WebControls::WebParts::WebPart ^ webPart, System::Web::UI::WebControls::WebParts::WebPartZoneBase ^ zone, int zoneIndex);public System.Web.UI.WebControls.WebParts.WebPart AddWebPart (System.Web.UI.WebControls.WebParts.WebPart webPart, System.Web.UI.WebControls.WebParts.WebPartZoneBase zone, int zoneIndex);member this.AddWebPart : System.Web.UI.WebControls.WebParts.WebPart * System.Web.UI.WebControls.WebParts.WebPartZoneBase * int -> System.Web.UI.WebControls.WebParts.WebPartPublic Function AddWebPart (webPart As WebPart, zone As WebPartZoneBase, zoneIndex As Integer) As WebPartParameters
- webPart
- WebPart
The WebPart (or server or user control) to be added to a Web page or opened on a page.
- zone
- WebPartZoneBase
The WebPartZoneBase that webPart is being added to.
- zoneIndex
- Int32
An integer that represents the ordinal position that webPart occupies in zone, relative to other controls in zone.
Returns
A WebPart control that was added to the page.
Exceptions
zone is not registered in the WebPartManager control's collection of zones.
-or-
webPart is already in zone.
The value of zoneIndex is less than zero.
Examples
The following code example demonstrates use of the AddWebPart method to add a server control programmatically to a page. The page markup contains an empty <asp:webpartzone> element, and an <asp:webpartmanager> element. The first time the Add Calendar button is clicked, the code in the event handler creates a Calendar control, and adds it to a zone as a GenericWebPart object, calling the AddWebPart method.
<%@ Page Language="C#" %>
<!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 Button2_Click(object sender, EventArgs e)
{
WebPartManager mgr = WebPartManager1;
Calendar cal = new Calendar();
cal.ID = "cal1";
GenericWebPart calWebPart = mgr.CreateWebPart(cal);
mgr.AddWebPart(calWebPart, WebPartZone1, 1);
}
protected void Button1_Click(object sender, EventArgs e)
{
if (WebPartZone1.WebParts.Count > 1)
{
WebPart cal = WebPartZone1.WebParts[1];
if (cal.Controls[0].GetType().Name == "Calendar"
&& cal != null)
WebPartManager1.DeleteWebPart(cal);
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Adding a Server Control</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:WebPartManager ID="WebPartManager1"
runat="server" />
<asp:WebPartZone ID="WebPartZone1" runat="server">
<ZoneTemplate>
<asp:BulletedList
DisplayMode="HyperLink"
ID="BulletedList1"
runat="server"
Title="My Links">
<asp:ListItem Value="http://www.microsoft.com">
Microsoft
</asp:ListItem>
<asp:ListItem Value="http://www.msn.com">
MSN
</asp:ListItem>
<asp:ListItem Value="http://www.contoso.com">
Contoso Corp.
</asp:ListItem>
</asp:BulletedList>
</ZoneTemplate>
</asp:WebPartZone>
<asp:Button ID="Button1" runat="server"
Text="Delete Calendar"
OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server"
Text="Add Calendar"
OnClick="Button2_Click" />
</div>
</form>
</body>
</html>
<%@ Page Language="vb" %>
<!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 Button2_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
Dim mgr As WebPartManager = WebPartManager1
Dim cal As New Calendar()
cal.ID = "cal1"
Dim calWebPart As GenericWebPart = mgr.CreateWebPart(cal)
mgr.AddWebPart(calWebPart, WebPartZone1, 1)
End Sub
Protected Sub Button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
If WebPartZone1.WebParts.Count > 1 Then
Dim cal As WebPart = WebPartZone1.WebParts(1)
If cal.Controls(0).GetType().Name = "Calendar" AndAlso _
cal IsNot Nothing Then
WebPartManager1.DeleteWebPart(cal)
End If
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Adding a Server Control</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:WebPartManager ID="WebPartManager1"
runat="server" />
<asp:WebPartZone ID="WebPartZone1" runat="server">
<ZoneTemplate>
<asp:BulletedList
DisplayMode="HyperLink"
ID="BulletedList1"
runat="server"
Title="My Links">
<asp:ListItem Value="http://www.microsoft.com">
Microsoft
</asp:ListItem>
<asp:ListItem Value="http://www.msn.com">
MSN
</asp:ListItem>
<asp:ListItem Value="http://www.contoso.com">
Contoso Corp.
</asp:ListItem>
</asp:BulletedList>
</ZoneTemplate>
</asp:WebPartZone>
<asp:Button ID="Button1" runat="server"
Text="Delete Calendar"
OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server"
Text="Add Calendar"
OnClick="Button2_Click" />
</div>
</form>
</body>
</html>
Remarks
The AddWebPart method is used both to add new dynamic WebPart controls to a page, and to reopen static or dynamic controls that have previously been closed on a page. When the method is called to add a new control, it actually creates a copy of the control referenced in the webPart parameter. A new ID is generated for the copy of the control, so developers should reference the WebPart control returned from the method to get the new ID value. When the method is called to reopen a previously closed control, it returns a direct reference to the control referenced by the webPart parameter.
Important
You should always use the AddWebPart method, rather than the Add method of the collection of controls referenced by the WebPartManager.Controls property, to add WebPart controls programmatically to the page, because using the Add method throws an exception. To add a control that is not a WebPart control (in other words, a server control that will be wrapped with a GenericWebPart control at run time), you should first call the CreateWebPart method to create the control, and then call the AddWebPart method to add the control. For a demonstration of this approach, see the Example section.
