I will dissect a Sample WPF MVVM application and then highlight the most important aspects of the MVVM by coding a brand new ViewModel and incorporating it into the application. You will learn about the Roles of the MVVM triad, the advantages of using MVVM and Characteristics of the ViewModel.

Attendees will be eligible to win two copies one copy (see below) of Josh Smith’s Advanced MVVM book as well as a few other WPF Books.

{ I will be giving away one hard copy version of the book instead of digital versions due to concerns about DRM protection and unclear gift guidelines at lulu.com }.

And the winner is … Mark Freeman !!! Congratulations Mark, your copy of “Advanced MVVM” is on its way. Thanks for attending the code camp and your feedback.

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Which changesets do you select to merge ? 56-60, right ? Well, not exactly. It depends. If you are using Subversion merge command, you will need to specify 55-60. If you are using TortoiseSVN, you will select 56-60. You should keep this in mind if you are used to TortoiseSVN and you are attempting a merge using SVN merge command. Otherwise, you will end up with a merge without change 56.

Selecting changes to merge can become non-trivial when you don’t know which changes have already been merged. However, there is good news. With subversion 1.5, when you are selecting changes from source branch to merge into a target branch, don’t do it ! Subversion 1.5 onwards has built-in merge tracking. When using TortoiseSVN, if your intention is to merge all changes, just leave the changeset selection blank. Subversion knows which ones have already been merged and which ones to merge and it does it automatically. You can also select changes that have already been merged and those will be handled (excluded) automatically too.

There is a summary of what to expect from Subversion Merge-Tracking feature here – Subversion 1.5 merge-tracking in a nutshell.

There is detailed description of Subversion Merge-Tracking here and search for ‘mergeinfo property’ in Subversion documentation.

The above screen-shot shows the changes already merged in grey. Thanks to Subversion’s mergeinfo property.

So, can I just stop worrying about changesets altogether, when merging ? There are a few caveats to how mergeinfo metadata is (and sometimes not) recorded. Read this for more information -  The Final Word on Merge Tracking.

Read about Subversion merging and branching here and TortoiseSVN merging documentation here – browse down to these sections : Reviewing the Merge Results and Merge Tracking.

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Assuming you are using TortoiseSVN, you can configure a Client-Side hook.

Here is an example – Say you want to abort commit if you have a comment in your code that starts with //Do Not Commit. You can create a PowerShell script that validates all the files in your changeset and use this script as a Client-Side pre_commit_hook in TortoiseSVN.

TortoiseSVN-Settings-HookScripts

The pre_commit_hook configuration :

Configure-Hook-Scripts

//Powershell script : pre_commit.ps1

$donotcommit = “//Do Not Commit“;

$changeset = Get-Content $args[0];

foreach($file in $changeset)
{
if( Get-Content $file | Select-String $donotcommit -quiet )
{
Write-Error “$file contains code that you are not supposed to commit. [$donotcommit]“;
exit 9;
}
}

Now, if your changeset has a file with a comment starting with //Do Not Commit and you click on OK to commit this change, the commit will be aborted with this error message -

pre_commit_hook-validation

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tasklist-mockup

Agenda :

Resources :

1. MSDN Magazine Article and Sample Application Download
2. Martin Fowler’s description of the ‘Presentation Model ‘
3. Jeremy Miller’s ‘Build Your Own CAB’ series

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1. Created a new printer (pointing to the same LPT port that is connected to NEC 870) on my Home PC using HP Laser Jet III driver.

2. Shared this new printer.

3. On the Windows 7 laptop, I dropped the document I wanted to print on this new printer. Voila !!!

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1. Attend as many of Llewellyn Falco’s and Woody Zuill’s sessions as you can. Specially, Unit Testing The Easy Way and one of the Dojo sessions. Any one of these sessions will make your entire trip worthwhile.

2.Kristian Hermansen’s Get Hacked Live ..

3. Stacey Broadwell’s Using Technology & Social Media to Target Candidates & Jobs should be very useful. I attended her recent presentation at L.A. Dot Net @ UCLA, it was very informative.

4. and of course If it walks like a Scrum … by yours sincerely.

I am planning to attend as many of the following sessions as the schedule allows -

* Algorithmic Trading in C#
scott hodson

* Automated Grid layout in Silverlight and WPF
Richard Fencel

* Building nTier Applications with Entity Framework Services
David McCarter

* Experiencing Agile Through Games
Carlton Nettleton

* Interoperability in the Cloud
Alejandro Espinoza

* Rapid Prototyping with Expression Blend
mark bosley

* One of Paul Sheriff’s WPF presentations

* SCRUM CLUB: Agile Requirements Gathering Workshop!
Amanda Abelove

See you there !

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You can create a database in from the SQL Azure Management page, shown above.

After you have created the database, of course, you can use DbUpdater with your SQL Azure databases. Here is the command-line :
DbUpdater.exe ..\SqlScripts /server:”tcp:SERVER.ctp.database.windows.net” /db:DATABASE /user:”USER@SERVER” /password:PASSWORD /confirm:true

And you will need this DbUpdater.exe.config file :

<?xml version=”1.0″ encoding=”utf-8″ ?>
<configuration>
<appSettings>
<add key=”file-prefix” value=”db” />
<add key=”file-extension” value=”sql” />
<add key=”schema-versions-name” value=”schema-versions-table.sql” />
<add key=”baseline-name” value=”baseline.sql” />
<add key=”post-script-prefix” value=”post” />
<add key=”post-script-always-apply” value=”true” />
<add key=”exe-file” value=”C:\Program Files\Microsoft SQL Server\90\Tools\Binn\SQLCMD.EXE” />
<add key=”exe-args” value=’-U %UserName% -P %Password% -S “%ServerName%” -d %DbName% -i “%SqlFile%”‘ />
<add key=”dialect” value=”NHibernate.Dialect.MsSql2000Dialect” />
<add key=”driver_class” value=”NHibernate.Driver.SqlClientDriver” />
<add key=”connection_string” value=”Server=%ServerName%;Database=%DbName%;User ID=%UserName%;Password=%Password%;Trusted_Connection=False;” />
</appSettings>
</configuration>

You can run sqlcmd.exe directly to execute t-sql scripts on SQL Azure. Here is a sample command :
sqlcmd.exe -S SERVER.ctp.database.windows.net -U USER@SERVER -P PASSWORD -d DB -i “baseline.sql”

I received these errors when I executed my SQL Server 2005 scripts on a SQL Azure database -

• ‘ANSI_NULLS’ is not a recognized SET option.
• Deprecated feature ‘SET ANSI_PADDING OFF’ is not supported in this version of SQL Server.
• Deprecated feature ‘More than two-part column name’ is not supported in this version of SQL Server.
• Deprecated feature ‘Data types: text ntext or image’ is not supported in this version of SQL Server.
• Deprecated feature ‘Table hint without WITH’ is not supported in this version of SQL Server.

These are not the limitations of the SQL Azure platform. SQL Azure is based on SQL Server 2008 Database Engine. The complete list of deprecated features in SQL Server 2008 are listed here along with the replacements (if any) : Deprecated Database Engine Features in SQL Server 2008 – MSDN.
After modifying the scripts to replace the deprecated features, the scripts could be executed without any further issues. All stored procedures, triggers and views were created without any errors.

The following error is a SQL Azure limitation.

• ‘Filegroup reference and partitioning scheme’ is not supported in this version of SQL Server.

Here is more detailed information on unsupported T-SQL – Unsupported Transact-SQL Statements (SQL Azure Database) – MSDN

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