Adding an Event to a User Control (Code Sample)

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/adding_an_event_to_a_user_control.htm]

I had talked about how to trigger an event from a UserControl.

This ability has many benefits, such as with refactoring. For example, suppose a UserControl is hosted on many different pages, and each page requires that the control have slightly different validation that incorporates values from the host page. One way to do this is to have the UserControl call a validation method on the host page.

Here's a code snippet you can download that shows how to have a UC call a method on its parent. The idea is to add an event member to the control, and hook it up with a delegate. (I had initially seen this technique from an article on MSDN several years ago).

This specific example has four files:

• A UserControl - RecordNav.ascx and RecordNav.ascx.cs
• A host page - HostRecordNav.aspx and HostRecordNav.aspx.cs

The UserControl contains an event "UpdateDate" and the host page adds a method to handle the event: RecordNav1_UpdateData.

    RecordNav1.UpdateData += new AspxDemo_Events_RecorNav.UpdateDataEventHandler(RecordNav1_UpdateData);

CNUG Presentation followup - MSBuild with source code samples

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/cnug_presentation_followup__msbuild_with_source_code_samples.htm]

Yesterday's presentation at the Chicago .Net Users Group went well. Paylocity sponsored it with a presentation on MSBuild: A Process Automation Language.

You can download the presentation and code samples here.

Here's the abstract:

.Net 2.0 introduces MSBuild – Microsoft’s new build engine with a process-oriented scripting language. While MSBuild is marketed for compilation and build processes, it is really a full-fledged automation language. It includes structured control flow, variables, refactorability, error handling, logging, and powerful extensibility. You can easily integrate MSBuild into your own enterprise processes and start adding value right away.

Multi-tasking with background processes

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/multitasking_with_background_processes.htm]

A miscellaneous thought for the day: Given enough time, what (non-computer) background processes do you run in your everyday life? Letting the dishes soak to get out a tough stain, or letting clothes air-dry?

If you have the time, these processes are very cheap yet effective. People who don't have the time pay for extra products to make these processes go faster (a powerful dishwasher, chemical cleaning products, or clothes dryer). It's the old cliche - time is money. Software development is the same way. Being able to just kick off a background process that does work for you can be a great way to increase productivity. It's like being able to do two things at once, such as integrating your code (continuous build on a build server) and doing local development, or running a local pre-checkin script to verify for unit test errors and reading a design doc.

It gets especially cool if you have access to other machines (or virtual machines), and you can kick off more than two things at once - like having a database integration test run on Machine X, performance tests run on Machine Y, Static Code Analysis / Unit Test coverage run on Machine Z, all while catching up on email.

All this really requires is the desire to multi-task, and the hardware to do it. Given that a computer is much cheaper than a developer, if one is multi-tasking properly, it could be well worth the investment

Presenting at Chicago .Net Users Group on MSBuild

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/presenting_at_chicago_net_users_group_on_msbuild.htm]

This Wednesday (Nov 15) I'll be presenting at the Chicago .Net User's Group on MSBuild: A Process Automation Language. Pizza starts at 6:30pm, the presentation at 7:00.

.Net 2.0 introduces MSBuild – Microsoft’s new build engine with a process-oriented scripting language. While MSBuild is marketed for compilation and build processes, it is really a full-fledged automation language. It includes structured control flow, variables, refactorability, error handling, logging, and powerful extensibility. You can easily integrate MSBuild into your own enterprise processes and start adding value right away.

It should be a good time.

Does .Net 2.0 make developers "dumber"?

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/does_net_20_make_developers_dumber.htm]

 

When .Net 2.0 came out, it had a slew of powerful new features that made many things easier. Some people have asked: "Does .Net 2.0 make us all dumber?" The thinking is that .Net 2.0's new power spoils us, much like calculators spoil many of today's kids from no longer being able to do basic arithmetic.

My answer is no - .Net 2.0 does not make us all dumber, for at least three reasons:

1. By simplifying certain tasks, .Net 2.0 frees up mental resources so that we can focus on other, more interesting things instead. This doesn't make a dev dumber, it just lets them focus elsewhere instead.
2. .Net 2.0 doesn't just take existing things and make them easier, it also breaks new ground such that you can do more with the same effort. For example - ASP.Net 2.0 introduces web callbacks - an alternative to postbacks. It's a standard tradeoff: callbacks are more powerful, but require more effort. This actually lets a dev be smarter, by making it practical for them to deal with more complex techniques.
3. Some things an average dev just couldn't do before - like web parts. Having this new power doesn't make the dev dumber, it just means that the same intellectual effort can go farther now.

There will always be a spectrum of smart, average, and below-average developers. As the technology continually grows, I think the trend isn't that the whole spectrum is getting dumber, but rather that it's getting more polarized. For example, .Net drastically lowered the entry-level for web programming (so less-smart people could start becoming web developers), but it also let you do more (so power users could do more).

Ego Star vs. Humble Average

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/ego_star_vs_humble_average.htm]

There is an interesting conflict between skill vs. humility:

1. Software teams requires smart people
2. Smart people tend to be more egotistical (because they think they're smarter than everyone else)
3. Egotistical people can hurt software teams because they ruin the chemistry and are no fun to work with.

So, the problem is that a smart person helps the team, but smart people usually have egos, which hurt the team. It prompts the question, would you rather have a coworker that is an egotistical star, or a humble average? (Of course everyone wants the best of both worlds, but life affords very few of those).

I see pros and cons to all the options on the spectrum. If you're doing a highly-complex feature, you may need the skills of the egotistical star, and may just need to tolerate the ego that goes along with it. If you're doing more commodity-type work, the humble average guy could be sufficient.

Personally, I'd like a balance, but find teamwork to trump ego. Because in enterprise architecture, you're always on teams with other people, and getting along with those people makes a world of difference. I'd rather be 10% late, and appreciate the team, then 10% early and hate the job.

I also find it's easier to learn from humbler people because they're more willing to share ideas, don't take criticism personally, and put the good of the project ahead of their personal ambitions.

Questions that I'd ask when trying to pick a person for a team:

• Is this position on a team - will they be working with other people?
• Are the skills replaceable? A developer's whose skills are easily replaceable doesn't have the right to be egotistical.
• Can you constrain/redirect their ego to something constructive (such as convert it into pride of ownership for difficult components, which helps the team).

MSBuild: Read and Write from a File to a Variable

[This was originally posted at http://timstall.dotnetdevelopersjournal.com/msbuild_read_and_write_from_a_file_to_a_variable.htm]

MSBuild lets you easily read and write values from files into variables. While you could write your own custom tasks to do this, MSBuild provides out-of-the-box functionality with the ReadLinesFromFile and WriteLinesToFile tasks.

You can read from a file into a variable:

    <ReadLinesFromFile File="Version.txt">
      <Output TaskParameter="Lines"
        PropertyName="Prop1" />
    ReadLinesFromFile>

This will store the contents of the file "Version.txt" in a dynamically created property "Prop1".

You can also write to files:

      <WriteLinesToFile File="myFile.txt" Lines="This is a test value." Overwrite="false" />
      <WriteLinesToFile File="myFile.txt" Lines="A second line." Overwrite="false" />