May 2005
Beginner
336 pages
10h 14m
English
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Adding Child Controls
The UserInfoTable web part isn't interactive: the information flows only from the server to the browser. To make a web part that can interact with members:
Declare the web controls to display in the web part.
Override the
CreateChildControlsevent to set control properties.Add each control to the controls collection.
Render the child controls in the
RenderWebPartevent.
The following code demonstrates the steps to create a Sum web part containing a textbox to receive a series of numbers input, a command button to perform the calculation, and a label to display the result:
' 1) Declare child controls. Dim _txt As New TextBox Dim _br As New Literal Dim WithEvents _btn As New Button Dim _lbl As New Label Dim _total As String Protected Overrides Sub CreateChildControls() ' Create utility object for dimensions. Dim u As Unit ' 2) Set child control properties. With _txt .Width = u.Pixel(400) .Height = u.Pixel(200) .TextMode = TextBoxMode.MultiLine End With With _br .Text = "<br>" End With With _btn .Width = u.Pixel(60) .Height = u.Pixel(30) .Text = "Sum" .ToolTip = "Click here to get total." End With With _lbl .Width = u.Pixel(100) .Height = u.Pixel(30) End With ' 3) Add the controls in the order to display them Controls.Add(_txt) Controls.Add(_br) Controls.Add(_btn) Controls.Add(_lbl) End Sub ' Display web part. Protected Overrides Sub RenderWebPart _ (ByVal output As System.Web.UI.HtmlTextWriter) ' 4) Write controls to output stream. RenderChildren(output) End ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.