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Creating a custom type converter part 3: Types to string

c# TypeConverter ComponentModel struct 2 Comments Downloads

I have discussed creating type converters a few times on this blog, and recently came across another use for them. I have a .NET Standard library that uses a variety of struct instances that are sometimes properties of concrete classes. I also have a .NET Framework 4.7.2 demonstration application to work with the library that uses the PropertyGrid control to provide easy editing facilities.

Note: While in this article I'm talking about using type converters purely in relation for use with the PropertyGrid control, this isn't their only purpose (just as well otherwise they wouldn't be a part of .NET Standard I assume). You can learn more about the TypeConverter class on MSDN.

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Setting tab stops in a Windows Forms TextBox control

c# winforms SendMessage pinvoke textbox EM_SETTABSTOPS 2 Comments Downloads

I was adding a Wizard to one of my applications, and the final screen of this Wizard was a summary of the user's choices. I wanted the user to be able to copy this to the Clipboard if required, and so I'd used a TextBox rather than the ListView I might have otherwise used. However, this presented a minor issue as I'd chosen to use tabs to delimit the information, and the varying length of text meant that this wasn't aligned as expected.

Previously I have "dealt" with this issue by cheating - I'd just add extra tabs to force everything to line up. However, I do plan on fully localising this application at some point, not to mention that even using a different font could potentially trigger the text to misalign once more. And so I decided to do it properly this time.

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Changes to CrashPlan for Small Business that may affect developer backups

CrashPlan Code42 3 Comments

This morning I received the following email from Code42 regarding their CrashPlan for Small Business service

Dear Valued Customer,

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Creating an ndrules file for use with NDepend

ndepend 0 Comments

A long time ago, I wrote of some initial experiences using NDepend. Since then, I've done little with the product, although I did integrate it with Jenkins for both pipeline and freestyle jobs and so every time the CI builds it executes NDepend. However, the NDepend configuration used by these jobs is (probably) significantly out of date.

As I've just upgraded NDepend to the current version, I thought I'd better update the configurations. Fortunately when I created NDepend projects, I always edited them to use an external rules file and to change all the paths to relative. Absolute paths don't work well in CI scenarios and it always felt very wrong to me to have every single project duplicating all the rules - updating them would be painful experience.

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Migrating from Azure translation API version 2 to 3

c# api azure rest translate localization 0 Comments Downloads

Almost two years ago I wrote a post describing how to translate text using Azure cognitive services, however the API it uses is to be switched off and so I needed to migrate from the version 2 API to version 3.

Whilst most of the code I post on this blog is used in one form or another, I've been using the TranslationClient client presented in that article as-is for the past two years. OK, I changed the namespace. But otherwise it's identical.

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Handling the orientation EXIF tag in images using C#

c# exif jpg orientation 0 Comments Downloads

Two weeks ago I received an interesting support ticket from a user of our ImageBox control, stating that when being used for .png files, the control was absolutely file but when used with .jpg files that had been rotated using Windows Explorer shell context menus, they were displayed in the original orientation.

As soon as I read the ticket I had a hunch what was going to be the ultimate cause, and was able to quickly reproduce the problem and then confirm my hunch.

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Frustrations of third party software

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No detailed blog post, just a screenshot that neatly echo's my ongoing frustration with Resharper. It was a lot longer than 7 seconds too...

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New option in Visual Studio 2019 keeps console window open after debugging

4 Comments

For as long as I've been writing console applications, I've at the end of Main I've always had a piece of code to require user input before exiting when in debug mode, in order to review any output before the window closes. Not an onerous task, but one I immediately do as soon as creating a new application.

Today I created a new .NET Core console application in Visual Studio 2019 preview and added by code without a second thought.

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Reading cookies from Internet Explorer

c# interop webbrowser InternetGetCookieEx cookie 0 Comments Downloads

In order to work around cases where it wasn't possible automatically authenticate with a website, I wanted the ability to use an embedded Internet Explorer window for manual authentication and then reuse the cookies. This article describes how to read cookies indirectly using InternetGetCookieEx or directly from a WebBrowser control.

The InternetGetCookieEx Win32 API can be used to read cookie name value pairs for a given URI. You can use it to read all cookies or a named cookie. You can also specify which type of cookies to include.

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Using message filters in Windows Forms applications

c# winforms pinvoke IMessageFilter 0 Comments Downloads

For a utility application, I wanted to add an item in the system menu. It's been quite a long time since I last did this (and was in VB6), so I decided to find some ready made source code. This class provides a nice little helper for wrapping the system menu to add new commands to it, but it requires the owner form to hook into its window procedure and forward messages on which I felt was an awkward design.

The code snippets below should illustrate my point - first we initialise the instance of the SystemMenu class, but in order for custom commands to be processed we have to override to override the form's WndProc and pass any messages received into the SystemMenu class.

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