(This post has been changed so that the text to be compiled is displayed in an editable text box) all that has to be done is create a new Windows form project, and overwrite the project files by using copy and paste from this article into the project files indicated by name)
First things first:
First thing you need to do is load the Roslyn compiler package.
In Visual Studio, Tools/NuGet Package Manager/Package Manager Console
at the PM> prompt, enter Install-Package Microsoft.CodeAnalysis
When you create your project, target .NET Framework 4.6.1 in project/properties/application/Target framework
This code has been tested with Visual Studio 2015 and .NET Framework 4.6.1
Program.cs
using System;
using System.Windows.Forms;
namespace ExecuteText {
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
Form1.cs
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Linq;
using System.IO;
using System.Collections.Generic;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.Emit;
using System.Reflection;
namespace ExecuteText
{
/**************************************************************************************************
* A form 1.
*
* @sa System.Windows.Forms.Form
**************************************************************************************************/
public partial class Form1 : Form
{
/**************************************************************************************************
* Default constructor.
**************************************************************************************************/
public Form1()
{
InitializeComponent();
}
/**************************************************************************************************
* Gets the assembly files in this collection.
*
* @param assembly The assembly.
*
* @return An enumerator that allows foreach to be used to process the assembly files in this
* collection.
**************************************************************************************************/
IEnumerable<string> GetAssemblyFiles(Assembly assembly)
{
var loadedAssemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (var assemblyName in assembly.GetReferencedAssemblies())
yield return loadedAssemblies.SingleOrDefault(a => a.FullName == assemblyName.FullName)?.Location;
}
/**************************************************************************************************
* Creates compiler context.
*
* @return The new compiler context.
**************************************************************************************************/
private CSharpCompilation CreateCompilerContext()
{
SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(TextBox.Text);
var assemblyName = Path.GetRandomFileName();
Assembly a = typeof(Form1).Assembly;
var refs = GetMetadataReferencesInAssembly(a);
var compilation = CSharpCompilation.Create(
assemblyName,
new[] {syntaxTree},
refs.ToArray(),
new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary));
return compilation;
}
/**************************************************************************************************
* Console write errors.
*
* @param result The result.
**************************************************************************************************/
private void ConsoleWriteErrors(EmitResult result)
{
var failures = result.Diagnostics.Where(CodeHasError);
var err = "";
foreach (var diagnostic in failures)
err += $"{diagnostic.Id}: {diagnostic.GetMessage()}";
ErrorTextBox.AppendText(err);
}
/**************************************************************************************************
* Executes the compiled code operation.
*
* @param ms The milliseconds.
**************************************************************************************************/
private void ExecuteCompiledCode(MemoryStream ms)
{
ms.Seek(0, SeekOrigin.Begin);
var assembly = Assembly.Load(ms.ToArray());
var type = assembly.GetType("AStringOfCode.FunctionClass");
var obj = Activator.CreateInstance(type);
type.InvokeMember("Run",
BindingFlags.Default | BindingFlags.InvokeMethod,
null,
obj,
new object[] {Block});
ShowPosition();
}
/**************************************************************************************************
* Gets metadata references in assembly.
*
* @param assembly The assembly.
*
* @return The metadata references in assembly.
**************************************************************************************************/
private List<MetadataReference> GetMetadataReferencesInAssembly(Assembly assembly)
{
var assemblyFiles = GetAssemblyFiles(assembly);
Console.WriteLine(assemblyFiles);
List<MetadataReference> refs = new List<MetadataReference>();
foreach (var assemblyname in assemblyFiles)
refs.Add(MetadataReference.CreateFromFile(assemblyname));
return refs;
}
/**************************************************************************************************
* Code has error.
*
* @param diagnostic The diagnostic.
*
* @return True if it succeeds, false if it fails.
**************************************************************************************************/
private bool CodeHasError(Diagnostic diagnostic)
{
return diagnostic.IsWarningAsError || diagnostic.Severity == DiagnosticSeverity.Error;
}
private void ShowPosition()
{
PositionTextBox.Text = Block.Location.X + "," + Block.Location.Y;
}
private void Form1_Load(object sender, EventArgs e)
{
ShowPosition();
}
private void Run_Click(object sender, EventArgs e)
{
var compilation = CreateCompilerContext();
using (var ms = new MemoryStream())
{
var result = compilation.Emit(ms);
if (result.Success)
{
ExecuteCompiledCode(ms);
}
else
{
ConsoleWriteErrors(result);
}
}
}
private void TextBox_TextChanged(object sender, EventArgs e)
{
}
}
}
Form1.Designer.cs
namespace ExecuteText
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
this.TextBox = new System.Windows.Forms.RichTextBox();
this.Block = new System.Windows.Forms.PictureBox();
this.Run = new System.Windows.Forms.Button();
this.ErrorTextBox = new System.Windows.Forms.RichTextBox();
this.PositionTextBox = new System.Windows.Forms.RichTextBox();
((System.ComponentModel.ISupportInitialize)(this.Block)).BeginInit();
this.SuspendLayout();
//
// TextBox
//
this.TextBox.Location = new System.Drawing.Point(12, 43);
this.TextBox.Name = "TextBox";
this.TextBox.Size = new System.Drawing.Size(400, 605);
this.TextBox.TabIndex = 0;
this.TextBox.Text = resources.GetString("TextBox.Text");
this.TextBox.TextChanged += new System.EventHandler(this.TextBox_TextChanged);
//
// Block
//
this.Block.BackColor = System.Drawing.Color.DodgerBlue;
this.Block.Location = new System.Drawing.Point(591, 314);
this.Block.Name = "Block";
this.Block.Size = new System.Drawing.Size(52, 50);
this.Block.TabIndex = 1;
this.Block.TabStop = false;
//
// Run
//
this.Run.Location = new System.Drawing.Point(12, 12);
this.Run.Name = "Run";
this.Run.Size = new System.Drawing.Size(75, 23);
this.Run.TabIndex = 2;
this.Run.Text = "Run";
this.Run.UseVisualStyleBackColor = true;
this.Run.Click += new System.EventHandler(this.Run_Click);
//
// ErrorTextBox
//
this.ErrorTextBox.Location = new System.Drawing.Point(12, 665);
this.ErrorTextBox.Name = "ErrorTextBox";
this.ErrorTextBox.Size = new System.Drawing.Size(747, 96);
this.ErrorTextBox.TabIndex = 3;
this.ErrorTextBox.Text = "";
//
// PositionTextBox
//
this.PositionTextBox.Location = new System.Drawing.Point(418, 43);
this.PositionTextBox.Name = "PositionTextBox";
this.PositionTextBox.Size = new System.Drawing.Size(341, 44);
this.PositionTextBox.TabIndex = 4;
this.PositionTextBox.Text = "";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(771, 773);
this.Controls.Add(this.PositionTextBox);
this.Controls.Add(this.ErrorTextBox);
this.Controls.Add(this.Run);
this.Controls.Add(this.Block);
this.Controls.Add(this.TextBox);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.Block)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.RichTextBox TextBox;
private System.Windows.Forms.Button Run;
public System.Windows.Forms.PictureBox Block;
private System.Windows.Forms.RichTextBox ErrorTextBox;
private System.Windows.Forms.RichTextBox PositionTextBox;
}
}
Form1.resx
<?xml version="1.0" encoding="utf-8"?>
<root>
<!--
Microsoft ResX Schema
Version 2.0
The primary goals of this format is to allow a simple XML format
that is mostly human readable. The generation and parsing of the
various data types are done through the TypeConverter classes
associated with the data types.
Example:
... ado.net/XML headers & schema ...
<resheader name="resmimetype">text/microsoft-resx</resheader>
<resheader name="version">2.0</resheader>
<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
<data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
<value>[base64 mime encoded serialized .NET Framework object]</value>
</data>
<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
<value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
<comment>This is a comment</comment>
</data>
There are any number of "resheader" rows that contain simple
name/value pairs.
Each data row contains a name, and value. The row also contains a
type or mimetype. Type corresponds to a .NET class that support
text/value conversion through the TypeConverter architecture.
Classes that don't support this are serialized and stored with the
mimetype set.
The mimetype is used for serialized objects, and tells the
ResXResourceReader how to depersist the object. This is currently not
extensible. For a given mimetype the value must be set accordingly:
Note - application/x-microsoft.net.object.binary.base64 is the format
that the ResXResourceWriter will generate, however the reader can
read any of the formats listed below.
mimetype: application/x-microsoft.net.object.binary.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.soap.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.bytearray.base64
value : The object must be serialized into a byte array
: using a System.ComponentModel.TypeConverter
: and then encoded with base64 encoding.
-->
<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
<xsd:element name="root" msdata:IsDataSet="true">
<xsd:complexType>
<xsd:choice maxOccurs="unbounded">
<xsd:element name="metadata">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" />
</xsd:sequence>
<xsd:attribute name="name" use="required" type="xsd:string" />
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="mimetype" type="xsd:string" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="assembly">
<xsd:complexType>
<xsd:attribute name="alias" type="xsd:string" />
<xsd:attribute name="name" type="xsd:string" />
</xsd:complexType>
</xsd:element>
<xsd:element name="data">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
<xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="resheader">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" />
</xsd:complexType>
</xsd:element>
</xsd:choice>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<resheader name="resmimetype">
<value>text/microsoft-resx</value>
</resheader>
<resheader name="version">
<value>2.0</value>
</resheader>
<resheader name="reader">
<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<resheader name="writer">
<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<data name="TextBox.Text" xml:space="preserve">
<value>using System;
using System.Drawing;
using System.Windows.Forms;
namespace AStringOfCode
{
public class FunctionClass
{
enum Directions
{
e_Up,
e_Down,
e_Left,
e_Right
};
private void Move(PictureBox p, Directions direction)
{
var fromPoint = p.Location;
var toPoint = p.Location;
switch (direction)
{
case Directions.e_Up:
toPoint = new Point(fromPoint.X, fromPoint.Y - 1);
break;
case Directions.e_Down:
toPoint = new Point(fromPoint.X, fromPoint.Y + 1);
break;
case Directions.e_Left:
toPoint = new Point(fromPoint.X - 1, fromPoint.Y);
break;
case Directions.e_Right:
toPoint = new Point(fromPoint.X + 1, fromPoint.Y);
break;
}
p.Location = toPoint;
}
public void Run(PictureBox p)
{
Move(p, Directions.e_Up);
}
}
}</value>
</data>
</root>
This should be what you're looking for.
When you run the application, you will see three windows and a button
1. the code window
2. the position window
3. the error window
and the "Run" Button.
...oh yes, let's not forget the "Block" we're moving!
you can modify the call to "move" by changing the second parameter to one of the 4 defined directions. When the "run" button is clicked, the code in the code window will be compiled and run (if there are no errors), the blue block will move one pixel in the direction indicated by the parameter to Move(), and the new position will be displayed in the Position window.
If there are errors in the compilation, they will be displayed in the Error window.
Hope this helps
