Monthly Archives: November 2016

Make mazes with topographic features in C#

Posted on November 30, 2016 by RodStephens

The example Make and draw a maze in C# shows how to use a random spanning tree algorithm to make mazes. This example shows how to modify the algorithm to make mazes that have specific topographic features. The previous example … Continue reading →

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Make and draw a maze in C#

Posted on November 29, 2016 by RodStephens

This example shows how to generate and draw a maze. To create the maze, it uses a spanning tree algorithm. A spanning tree is a tree that connects all of the nodes in a network. The following steps show the … Continue reading →

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Graph equations entered by the user in C#

Posted on November 28, 2016 by Rod Stephens

This example draws a graph of an equation entered by the user by combining techniques from the following two posts: Evaluate numeric expressions that are entered by the user in C# Graph an equation in C# This example uses techniques … Continue reading →

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Graph an equation in C#

Posted on November 27, 2016 by Rod Stephens

This example uses the the following MakeGraph method to draw the graph. // Make the graph. private void MakeGraph() { // The bounds to draw. float xmin = -3; float xmax = 3; float ymin = -3; float ymax = … Continue reading →

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Find files in the startup directory in C#

Posted on November 26, 2016 by Rod Stephens

In some programs you may want to find files that were installed with the program. One way to do that is to put the files in the program’s installation directory. Open the Project menu, select Add Existing Item, find the … Continue reading →

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Evaluate numeric expressions that are entered by the user in C#

Posted on November 23, 2016 by Rod Stephens

This example shows one way to evaluate mathematical expressions entered by the user at runtime. Enter a numeric expression involving x and y in the upper text box. Then enter values for x and y in the lower text boxes … Continue reading →

Posted in algorithms, mathematics, miscellany, programs, reflection | Tagged , , , , , , , , , , , | 2 Comments

List the locations of special folders in C#

Posted on November 23, 2016 by Rod Stephens

The System.Environment class’s SpecialFolders enumeration lists special folders such as System, Cookies, Desktop, and so forth. The class’s GetFolderPath method returns the full path for one of the special folders values. This program uses the following code to enumerate the … Continue reading →

Posted in directories, files, system | Tagged , , , , , , , , , , , | 2 Comments

List languages that you can compile at runtime in C#

Posted on November 22, 2016 by Rod Stephens

The example Run user-entered code in C# shows how to let the user enter C# code, compile at runtime, and execute the result, but how do you know what languages you can compile that way? You might guess C# and … Continue reading →

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Run user-entered code in C#

Posted on November 21, 2016 by Rod Stephens

This example shows how to compile and run user-entered code at run time. The form includes the following using statements. using System.CodeDom.Compiler; using System.Reflection; The following code executes when you click the Run button. // Compile and execute the code. … Continue reading →

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Display tooltips for ListView items in C#

Posted on November 18, 2016 by Rod Stephens

This example shows how to display different tooltips for the items in a ListBox. When you move the mouse over an item in the ListBox, the program uses the following code to display a tooltip for it. // Display a … Continue reading →

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