May 2005
Beginner
336 pages
10h 14m
English
The core of the web part template code is the RenderWebPart method. This method is called just before the control is disposed
and it determines the appearance of the part on the page.
To create this
appearance, you write HTML to the output object. For
example, the following code displays a simple table containing information about the current
user's
identity:
' Requires this line at class level
' Imports System.Security.Principal
Protected Overrides Sub RenderWebPart _
(ByVal output As System.Web.UI.HtmlTextWriter)
' Get the User identity.
Dim user As IPrincipal = Me.Context.User
' Write table to output
With output
.Write("<TABLE id='tblUser'>")
.Write("<TR><TD>Authenticated</TD><TD>")
.Write(user.Identity.IsAuthenticated())
.Write("</TD></TR><TR><TD>User name</TD><TD>")
.Write(user.Identity.Name())
.Write("</TD></TR><TR><TD>Authentication type</TD><TD>")
.Write(user.Identity.AuthenticationType())
.Write("</TD></TR><TR><TD>Code is impersonating</TD><TD>")
.Write(WindowsIdentity.GetCurrent().Name) .Write("</TD></TR><TR><TD>Request language: </TD><TD>")
.Write(context.Request.UserLanguages(0))
.Write("</TD></TR><TR><TD>Request host: </TD><TD>")
.Write(context.Request.UserHostName)
.Write("</TD></TR><TR><TD>Request IP: </TD><TD>")
.Write(context.Request.UserHostAddress)
.Write("</TD></TR></TABLE>")
End With
End SubAt runtime, the preceding web part displays user information in a two-column table, as shown in Figure 9-5.
Figure 9-5. Rendering UserInfo web ...