Category Archives: programs

Run user-entered code that modifies the program’s form in C#

Posted on April 14, 2017 by RodStephens

The example Run user-entered code in C# shows how you can compile and execute code entered at run time. That example simply displays a message box and returns a DialogResult indicating which button the user pressed. This example shows how … Continue reading →

Posted in algorithms, miscellany, programs, reflection | Tagged algorithms, C#, C# compiler, C# programming, CodeDom, compile C# code, compile code, compiler, example, example program, miscellany, programs, reflection, run C# code, run code, user-entered code, Windows Forms programming | Leave a comment

Display memory usage in C#

Posted on December 12, 2016 by Rod Stephens

This program displays the computer’s total and free physical, virtual, and page file memory usage. When it starts, the following code displays the system’s memory information in the program’s ListView control. // Prepare the ListView and display values. private void … Continue reading →

Posted in memory, programs | Tagged C#, C# programming, example, example program, memory, memory usage, page file memory, page files, physical memory, programs, virtual memory, Windows Forms programming | Leave a comment

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 algorithms, C#, C# programming, evaluate, evaluate expressions, example, example program, mathematics, miscellany, programs, reflection, Windows Forms programming | 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 →

Posted in algorithms, miscellany, programs, reflection | Tagged algorithms, C#, C# compiler, C# programming, CodeDom, compile at runtime, compile C# code, compile code, compiler, example, example program, miscellany, programs, reflection, run C# code, run code, user-entered code, Windows Forms programming | 1 Comment

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 →

Let a thread call a form’s methods in C#

Posted on October 23, 2016 by Rod Stephens

When the user clicks the Start Thread button, this program runs a counter on a separate thread. Every second the counter updates the form’s Value variable. It then displays the thread’s number and the new Value in the ListBox at … Continue reading →

Posted in algorithms, programs, system, threading | Tagged algorithms, C#, C# programming, example, example program, invoke, InvokeRequired, lock, lock object, multi-threading, multithreading, programs, race condition, system, threading, UI thread, Windows Forms programming | Leave a comment

Run threads with different priorities in C#

Posted on October 21, 2016 by Rod Stephens

This example runs several different threads at different priorities. Each of the threads executes the following Counter class’s Run method. class Counter { // This counter’s number. public string Name; // Initializing constructor. public Counter(string name) { Name = name; … Continue reading →

Posted in algorithms, programs, system, threading | Tagged algorithms, background, C#, C# programming, core, dual core, example, example program, IsBackground, logical processors, multi-core, priority, processors, programs, system, thread, Thread class, thread priority, threading, threads, Windows Forms programming | Leave a comment

Get the program’s memory usage in C#

Posted on November 19, 2015 by Rod Stephens

This example uses the following code to display information about its memory usage. // Display information about the current process’s memory usage. private void Form1_Load(object sender, EventArgs e) { Process proc = Process.GetCurrentProcess(); AddItem(lvMemory, “Min Working Set”, ((double)proc.MinWorkingSet).ToFileSize()); AddItem(lvMemory, “Max … Continue reading →

Posted in memory, programs | Tagged C#, C# programming, example, example program, memory, memory usage, memory use, programs, Windows Forms programming | Leave a comment

Display an end user license agreement (EULA) in C#

Posted on April 20, 2015 by Rod Stephens

Many program display an end-user license agreement (EULA) when they are installed or the first time they are run. This example uses a form called EulaForm to display a RichText format EULA file. The form returns DialogResult.OK if the user … Continue reading →

Posted in forms, programs, registry | Tagged C#, C# programming, end user license agreement, EULA, example, example program, forms, programs, registry, Windows Forms programming | Leave a comment

Register a program for a particular system in C#

Posted on December 20, 2014 by Rod Stephens

This example demonstrates a fairly simple technique that you can use to register a program for a particular system. A determined hacker could circumvent it, but for most programs it won’t be worth the effort. The idea is simple. When … Continue reading →