Develop Reference

C#: Create custom msi file

I need to create a custom installer to deploy a specific program. But there are a few checks and balances that needs take place during intallation, and even though I have an Advanced Installer license, it just struggles to do everything I need.
I'm looking for a way to create my own msi file using c#. Running the msi file it will then start a win forms wizard, which in turn will do a number of items, including copying files to the host PC.
I'm not sure how I can "include" my set of files into a single msi file. How to you "copy" files into an msi and how can you read again from it?
I can't even give a proper sample code of what I've tried as I don't know where to start.
This just feels like it should be a duplicate question, but I can't find it.

I work at Advanced Installer, since you said you already have a license let's help you get a return of investment on that ;)
First of all, I seriously doubt you need to reinvent the wheel and write your own code that installs/copies files on the machine. This is a basic action performed by all installer authoring tools, and even though it seems simple when you first think about it, it is not. You don't want to write code that handles rollbacks (if your install fails), reference counts (if a file is shared somehow), repair/self-healing operations (if somehow a DLL gets corrupted or missing post-install), or cover other standard Windows Installer scenarios.
Since you didn't explain with full details what you are trying to do I will give you some short example on how to do each of the steps you mentioned:
Adding files in a setup package - this is a link to a tutorial created with a free edition, but the same steps apply for Professional and Enterprise editions.
Searching files on a disk and retrieving values from them. - for this, you need to use the built-in support from Search page. There you can either simply search for a file and return its path or search for an element inside an INI or XML file and return its value inside a property.
Windows Installer properties are the equivalent of variables in your code. You can use them all over the installer project to pass/get/validate values.
Designing custom dialogs. Most professional installer authoring tools have support to build custom dialogs. The previous link is for a tutorial on how you can do that with Advanced Installer.
During the UI stages, you can include and custom C# code to perform additional validations or data retrieval operations and pass that to or from the installer using properties. if you need it.
The custom installer dialogs support is available starting with the Enterprise edition. The Professional and Free editions include the standard dialogs, but with no options to customize them.
Another way to interact with users is to design an UI experience inside your application that is visible only when the users launch the application for the first time. So, this is not a part of your installer. It will be code that you write inside your application and you can provide a first-launch experience similar to what you see when you install Office for example. If you can give me more details on what you want to do/capture in those custom dialogs, I will try to recommend you the best approach.

Structure of an installer wizard

I'm working on an installation and configuration application in C# for a project I'm working on, and I'm wondering what the best method of internally organising everything is.
Requirements:
Single executable for deployment, no other files bundled with it.
Has to support custom config steps on each panel, which contribute to a generated XML config file at the end.
Certain steps may be skipped based on certain choices made within the installer flow.
Must support dynamic config screens based on information fed back from classes in one of my libraries.
Here's a description of my prototype:
A large form with a bunch of Panel controls, each representing one "screen" of the wizard. Each is named appropriately.
A class for each "screen", deriving from a base type I defined. I call specific methods of it (e.g. Enter, Back, Forward) when certain events occur.
State is stored as a Dictionary<string,object>, which is passed to each screen. The final screen (the actual "Installing..." screen) reads config out of this and dumps it into the XML file.
Each screen's code is responsible for handling the "Next" and "Prev" buttons, so I can control where it jumps to based on settings in the current screen.
A number of modules are stored in my library which provide information about extra config steps that need to be taken. I'm implementing this through reflection and automated UI generation.
Assets are stored in the resources of the executable.
I don't want to use a generic installer package (e.g. InstallShield) because the logic is totally custom and calls upon one of my class libraries. What I would like to know is - am I setting this out in a really circuitous way? Is there a simpler or more standard way to wizard-style applications?

Here's the short answer:
A commercial tool is perfect for what you need because it supports both custom installation UI and dynamic XML files. Anything else requires a lot of learning and hard work.
And the long explanation:
A custom installation UI is not an easy task. Windows Installer offers built-in dialogs and controls, so it's usually the best solution. You could also try a proprietary installation engine, but you will need to learn it.
You're also taking an incorrect approach by trying to control everything with custom code and classes. Most setup authoring tools offer direct support for handling the installation UI and XML files. Why try reinventing the wheel?
So you basically need to find the setup authoring tool which is best for you. Here is a general list:
http://en.wikipedia.org/wiki/List_of_installation_software
The tools are either MSI-based or proprietary. Personally I prefer Windows Installer (MSI packages).
Trying to implement all your tasks with custom code is just not worth it.

The only proper way to install software on Windows (which I assume is your target platform) is using Windows Installer. Simplifying a bit Windows Installer is based on the concept of a installation package (a database file) that in a transactional way can be added or removed from the system.
If you write your own installation logic you will not be able to participate in the transactional handling of software installation. If your uninstaller gets deleted there is no way the user can uninstall your software. Also, Windows Installer knows A LOT about the quirks of Windows which you may not be aware of.
Windows Installer provides a somewhat cryptic API for creating packages but you can also use then open source WiX toolset which is quite powerful or any commercial installer like InstallShield.
If you decide to go the Windows Installer way you should try to avoid custom actions if possible. Custom actions suffer from the same "transaction rollback" problem as a custom installer. You create the code for the custom action rollback/uninstall say in a DLL and if that DLL is lost there is no way Windows Installer can undo your custom action.
Windows Installer is actually quite powerful. You havn't given any specific information about the "custom stuff" you need to do but perhaps Windows Installer already has a table for that?

Use InstallShield or the MSI installer. Seriously. In addition to being able to support all kinds of custom logic (including code you specify), the generic installer wizards do things you're not even thinking about, like, say, listing the installed app in Programs and Features, and performing repair installs/uninstalls.
With the level of custom logic you're looking at, I would fork out for the latest InstallShield installer builder; the VS Install project builds into a pretty simple dialog set.
EDIT: Fair enough, been in that position before.
I would still HIGHLY recommend using any generic installer tools you have available, like VS's Install project, for the reasons I stated above; the install packages do things you aren't even thinking about in your design, and you get all of it for free.
Instead of putting this logic to customize your XML config file in the installer, how about putting it in your executable, as a "run-once" configuration wizard that the user will see when they start the application after installing it? It shouldn't be too off-putting to your users, and it should work well if the actual application is also a WinForms app (even if it isn't; you could compile the configurator into a different app and have your main app launch the configurator if it doesn't have an XML file).

Single executable for deployment, no other files bundled with it.
This might of some interest to you : http://blogs.msdn.com/b/microsoft_press/archive/2010/02/03/jeffrey-richter-excerpt-2-from-clr-via-c-third-edition.aspx

Any easy way to notify user to update powerpoint add-in

is there a way to notify user about a new version of plugin available?
This can be certainly done by writing some custom code to ping webservice, finding status and based on that displaying message, but then i am wondering if there is a predefined way/template available which can be used and achieved.
If you are sharing sample code, I like C#.

I think one of the best ways to achieve this without writing your own custom code is to use ClickOnce (or a ClickOnce alternative) - "ClickOnce applications can be self-updating; they can check for newer versions as they become available and automatically replace any updated files."
ClickOnce can be and is often used in conjunction with Office addins - for example, see http://robindotnet.wordpress.com/2010/07/11/how-do-i-programmatically-find-the-deployed-files-for-a-vsto-add-in/
Also, another question regarding open-source options to Click-Once might be a good idea - clickonce - what is a good open source alternative to clickonce? (DDay.Update)?

Determine process id by clicking on the window of the executable in question

can someone give me a clue as to how to accomplish the following:
By clicking on an application's window, I'd like to determine the process id of executable concerned.

There is a fair amount of Win32 API calls required to get this to work in .NET. I would suggest you look at the .NET open source project Process Hacker as it does what you want already.
It is LGPL licensed and provides libraries to include in your project to get it's functionality. From the FAQ
I'm a developer. Can I use the various functions provided by Process Hacker
in my own program?
If you're using a
.NET-based language (C#, VB.NET),
absolutely! Simply download the source
code (or checkout the latest SVN
revision), build the solution, and
reference ProcessHacker.Common and
ProcessHacker.Native in your project.

Updating a desktop application without touching the attached .mdf

Just a quick question:
I'm in the finalizing state of my current C# project, and I'd like to send a version out to people that has 90% of the features initially requested, but it'll be a version of the software that will do all they need - they need the software as soon as possible, basically.
Therefore I'm going to be using the online install option in VS2008 that will use updating to add the final few features, as well as additional things, later. What I'm wondering is the following:
The program will come packaged with a .mdf file. When I create a new version of the program however, I don't want to change all of the data that has been added to the database already. My question is how do I go about doing this?
Thanks!

How are you planning to distribute the update? An installer will have flags indicating when a file should be replaced. (Date, version etc)
One-Click installation has the ability to check for changes on program startup.