Category Archives: classes

Find class ancestors in C#

The example Find classes that implement an interface or that are descendants of a given class in C# shows how to find a list of classes that are descendants of a class or interface. This example uses similar code to … Continue reading

Posted in classes, inheritance, interfaces, reflection | Tagged , , , , , , , , , , , , , , , | Leave a comment

Find classes that implement an interface or that are descendants of a given class in C#

This example lets you find classes that are part of an inheritance or implementation hierarchy. When you enter a class or interface name and click Find, the example uses the following code to search the currently loaded assemblies for classes … Continue reading

Posted in classes, inheritance, interfaces, reflection | Tagged , , , , , , , , , , , , , , | 1 Comment

List a program’s loaded assemblies in C#

The key to this example is the following ListAssemblies method. // List the assemblies. private void ListAssemblies() { lblNumAssemblies.Text = “”; lstAssemblies.Items.Clear(); Cursor = Cursors.WaitCursor; Refresh(); foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies()) { lstAssemblies.Items.Add(assembly.GetName().Name); } // Display the number of assemblies. … Continue reading

Posted in classes, reflection | Tagged , , , , , , , , , , , , | Leave a comment

Use Array methods in C#

The example Sort and search arrays in C# shows how to use two useful Array methods: Sort and BinarySearch. This example demonstrates some other useful Array methods. For simplicity, this example uses arrays of characters to demonstrate the Array methods, … Continue reading

Posted in arrays, classes | Tagged , , , , , , , , , , , , , | Leave a comment

Create a class outside of any namespace statement in C#

When you create a class in C#, Visual Studio automatically puts it inside a namespace statement. If your project’s name is howto_remove_namespace, then by default that namespace is howto_remove_namespace. But did you know that you can create classes outside of … Continue reading

Posted in classes, syntax | Tagged , , , , , , , | 2 Comments

Make a simple event logger in C#

Usually the debugger lets you examine how a program works quite effectively, but sometimes it’s useful to use an event logger to record events for later study. For example, when you’re working with mouse events, stopping execution at a break … Continue reading

Posted in classes, debugging, files | Tagged , , , , , , , , , , | Leave a comment

Give a class default indexer properties in C#

An indexer property is a property that other code can use inside square brackets to access some value provided by the class, much as you can use the index of an array. Unlike an array, a class’s indexer need not … Continue reading

Posted in arrays, classes, syntax | Tagged , , , , , , , , , | Leave a comment

Use a TextFieldParser to read fixed-width data in C#

This example uses a TextFieldParser object to load fixed-width data from a file that contains names and addresses. Each field has a fixed width. Some records also have ZIP+4 format ZIP codes (for example, 08109-2120) and the program should discard … Continue reading

Posted in classes, database, files, parsing | Tagged , , , , , , , , , , , , , , , | Leave a comment

Use a TextFieldParser to read delimited data in C#

This example uses a TextFieldParser object to parse a data file that contains name and address data. The data contains fields delimited by commas and semi-colons. Some records also have ZIP+4 format ZIP codes (for example, 08109-2120) and the program … Continue reading

Posted in classes, database, files, parsing | Tagged , , , , , , , , , , , , , | 2 Comments

Draw a scrolling family tree in C#

The example Draw a family tree in C# shows how to draw a family tree. Unfortunately if the tree is too big, you can’t make the form big enough to display it all. One solution would be to use smaller … Continue reading

Posted in algorithms, classes, generic, graphics, OOP | Tagged , , , , , , , , , , , , , , , , , , , , , | 1 Comment