I was looking at some web forms with Trace enabled in ASP.NET 2.0, looked at the ViewState size, and remembered reading about some view state enhancements in 2.0. So I did a little experiment.
In ASP.NET 1.1 I rendered ‘SELECT * FROM pubs..employee’ in a DataGrid control using all the default settings (auto-generated columns, ViewState enabled). The resulting page used 26,241 bytes.
In ASP.NET 2.0 I rendered ‘SELECT * FROM pub..employee’ in a DataGrid control, again using all the defaults. The resulting page used 16,089 bytes. A difference of 10,152 bytes, which is quite a bit if you insist on enabling ViewState on a DataGrid. The same experiment using the new GridView control, with sorting enabled, ran 17,996 bytes.
For anyone who has not seen the GridView in action, Dino Espisito has an article: Move Over DataGrid, There's a New Grid in Town!
I noticed in the trace there is a new PreInit event in the page life cycle. This makes me wonder if we might need a PrePreInit event in ASP.NET 3.0? Perhaps a BeforePreInit?
It turns out PreInit is the event to grab in order to dynamically change the personalization, theme, or master page settings (it was also time to get in touch with my kindler, gentler, VB side, but don’t tell anyone):
Private Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit MasterPageFile = "~/FunkyDoodleLayout.master" End Sub
Setting the MasterPageFile property after the PreInit event only throws an exception. Paul Wilson has a good introduction to the Master Page feature: Standardize Your Site Fast With Master Pages.
Somehow, in the middle of this, I began surfing and read about Boston’s Great Molasses Flood of 1919. I’ve never heard of this and first thought it was an urban myth, but it’s not. A 30 foot high wall of molasses moving at 35 miles per hour.
The code expansion in C# is quite good. I type the ‘using’ keyword, hit the TAB key, and the IDE inserts a code block for me:
using (resource) { }
The word resource appears in yellow and is selected, so I just need to type in the expression. If you expand a for statement, then the initializer is highlighted. As soon as you change the variable name in the initializer, the IDE changes the variable name in the expression and iterator to match, saving quite a few keystrokes.
What is interesting is the C# code snippets center around simple block statements (lock, using, for, do). The VB snippets seem to include entire algorithms. You choose to “Insert Snippet…”, then chose “Processing Drives, Folders, and Files”, then “Parse Column Data In a Text File”, and the IDE spits out the following code, where the file name and delimiters array are replaceable by tabbing through the snippet and typing (this is hard to describe, you just have to try it):
' This example parses a file with this structure. ' Line1Column1, Line1Column2, Line1Column3 ' Line2Column1, Line2Column2, Line2Column3 ' Line3Column1, Line3Column2, Line3Column3 ' Line4Column1, Line4Column2, Line4Column3 Dim parser As TextFieldParser parser = My.Computer.FileSystem.OpenTextFieldParser("C:\TextFile.txt") parser.Delimiters = New String() {","} Dim fields() As String While Not parser.EndOfData Try ' ReadFields reads one line of data from the file. ' Array 'fields' contains one string element for each column. fields = parser.ReadFields Catch ex As MalformedLineException MsgBox("Error on line: " & ex.LineNumber) Throw ex End Try End While parser.Close()
As I’ve said before, someday I’m going to come home and find my cat has written a Tetris clone by sleeping on my keyboard. In VB of course.
I work in a government technology “incubator” building, meaning there are a dozen startup companies around here and we share a common copier room, common break room, and common conference rooms. The key word here is ‘government’. I have complete faith the county maintenance people feel my discomfort and will rush to fix the air conditioning problems just in time for the first major snowfall of the year.
In other news, I’ve been under a lot of peer pressure lately. Test driven development is a great way to write quality code, but sometimes good old fashioned peer pressure works just as well. Why just recently I opened the latest build notes to look at the list of file diffs. Imagine my surprise when I see:
File | Check-in Date | Version | Check-in By | Comment |
VisitSearch.ascx.cs | 8/8/2004 11:42:36 AM | 2 | Plall | Fix Scott’s sloppy code. |
For anyone facing authentication or authorization errors in a Reporting Services environment, or just looking for some introductory material, I've posted two new articles to OdeToCode:
Introduction To Role-Based Security In SQL Server Reporting Services
Authentication, Role-based Security, and Reporting Services Web Services
If you give them a read, please let me know if you think they are easy to understand, and please let me know if they contain any errors.