[Tut]Make your own simple C# Compiler

[Syst3m_W1z4rd]

First of all create a new form.
Then we need to set it up simple.

First thing we do is making a panel.
Drag the panel to the form and set the dock to "Top".
Drag a toolstrip into the panel.
Now drag another panel into the form and set the dock to "Right".
And then a last panel into our form. The dock of that should be "Fill".

It should look something like this now:

 Spoiler

The next thing we do is dragging a tabcontrol into the panel3.
Delete the 2tabs it have and make the dock "Fill".

Now in the panel2 put a label, a textbox, 2 radiobuttons and a listbox.
The label should have the text "Assembly name".
The first radiobutton should have the text "Class Library" and it should be checked. The second should have the text "Console application".
The listbox should have dock to "Bottom".

Now it should look something like this:

 Spoiler

The next thing we do is adding a 2 dropdowns to our toolstrip.
One called "File" and one called "Project".

Set the File displaystyle to "Text".
Make sure ShowDropDownArrow is set to "false".
Following dropdownitems should be added.

New File
Open File
Save File

Set the Project displaystyle to "Text".
Make sure Make sure ShowDropDownArrow is set to "false".
Following dropdownitems should be added.

Compile And Run
Compile Only
Add Reference

It should all look like this now:

 Spoiler

Now the base GUI is done and we will start on the coding.
First thing we do is adding the "New File".
Double click on it and you should get this code:

        private void newFileToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

Replace it with:

        private void newFileToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TabPage page = new TabPage();
            page.Name = "New File";
            page.Text = "Unnamed.cs";

            RichTextBox rtb = new RichTextBox();
            rtb.Name = "richTextBox1";
            rtb.Size = new System.Drawing.Size(100, 96);
            rtb.TabIndex = 5;
            rtb.Dock = DockStyle.Fill;
            rtb.BorderStyle = BorderStyle.None;
            rtb.Font = new System.Drawing.Font("Consolas", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            rtb.Text = @"using System;

namespace Application
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine(""Hello World"");
        }
    }
}";
            page.Controls.Add(rtb);
            tabControl1.Controls.Add(page);
        }

Now we can create new files.
Now click on the Open File.
You should get this code:

        private void openFileToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

Replace it with:

        private void openFileToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFileDialog opn = new OpenFileDialog();
            opn.Title = "Open File";
            opn.Filter = "CSharp Coding Files|*.cs";
            opn.Multiselect = false;

            if (opn.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                string Name = System.IO.Path.GetFileName(opn.FileName);
                TabPage page = new TabPage();
                page.Name = "New File";
                page.Text = Name;

                RichTextBox rtb = new RichTextBox();
                rtb.Name = opn.FileName;
                rtb.Size = new System.Drawing.Size(100, 96);
                rtb.TabIndex = 5;
                rtb.Dock = DockStyle.Fill;
                rtb.BorderStyle = BorderStyle.None;
                rtb.Font = new System.Drawing.Font("Consolas", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

                rtb.Text = System.IO.File.ReadAllText(opn.FileName);
                page.Controls.Add(rtb);
                tabControl1.Controls.Add(page);
            }
        }

Now click the Save File and you should get this code:

        private void saveFileToolStripMenuItem_Click(object sender, EventArgs e)
        {
        }

Replace it with:

  private void saveFileToolStripMenuItem_Click(object sender, EventArgs e)
        {
            SaveFileDialog save = new SaveFileDialog();
            save.Title = "Save File";
            save.Filter = "CSharp Coding Files|*.cs";

            if (save.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                if (save.CheckFileExists)
                {
                    DialogResult dlg = MessageBox.Show("Are you sure you want to overwrite this file?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
                    if (dlg == System.Windows.Forms.DialogResult.No || dlg == System.Windows.Forms.DialogResult.Cancel)
                        return;
                }

                FileStream fs;
                try
                {
                    fs = new FileStream(save.FileName, FileMode.Truncate);
                }
                catch
                {
                    fs = new FileStream(save.FileName, FileMode.CreateNew);
                }
                StreamWriter sw = new StreamWriter(fs);
                foreach (Control ctrl in tabControl1.Controls)
                    if (ctrl is TabPage)
                    {
                        foreach (Control Ctrl in ctrl.Controls)
                            if (Ctrl is RichTextBox)
                            {
                                sw.WriteLine(Ctrl.Text);
                            }
                    }
                sw.Close();
                fs.Close();
                tabControl1.SelectedTab.Text = System.IO.Path.GetFileName(save.FileName);
            }
        }

Now go to the dropdown Project and click on Add Reference.
You should get this code:

        private void addReferenceToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

Replace it with:

        private void addReferenceToolStripMenuItem_Click(object sender, EventArgs e)
        {
                OpenFileDialog opn = new OpenFileDialog();
                opn.Title = "Add Reference";
                opn.Filter = "Libraries|*.dll";
                opn.Multiselect = false;
                if (opn.ShowDialog() == DialogResult.OK)
                {
                    if (!Directory.Exists(Environment.CurrentDirectory + @"\References"))
                    {
                        DirectoryInfo dir = new DirectoryInfo(Environment.CurrentDirectory + @"\References");
                        dir.Create();
                    }
                    string[] FILE = opn.FileName.Split(new char[] { '\\' });
                    File.Copy(opn.FileName, Environment.CurrentDirectory + @"\References\" + FILE[FILE.Length - 1], true);
                    listBox1.Items.Add(FILE[FILE.Length - 1]);
                }
        }

Now make a new class and call it Compiler.
Replace it all with this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.CSharp;
using System.CodeDom.Compiler;

namespace CS_Compiler
{
    public class Compiler
    {
        public Compiler(string ApplicationName, bool EXE, string Code, string[] References, bool run)
        {
            ApplicationName = ApplicationName.Split('.')[0];//To make sure we won't use a wrong extension.
            if (EXE)
                ApplicationName += ".exe";
            else
                ApplicationName += ".dll";

            CSharpCodeProvider codeProvider = new CSharpCodeProvider();
            ICodeCompiler icc = codeProvider.CreateCompiler();
            System.CodeDom.Compiler.CompilerParameters parameters = new CompilerParameters();
            parameters.GenerateExecutable = EXE;
            parameters.OutputAssembly = ApplicationName;
            if (References != null)
            {
                for (int i = 0; i < References.Length; i++)
                {
                    parameters.ReferencedAssemblies.Add(References[i]);
                }
            }
            CompilerResults results = icc.CompileAssemblyFromSource(parameters, Code);
            //Use results.Errors to get all the errors compiling.

            if (run && EXE)
                System.Diagnostics.Process.Start(ApplicationName);
        }
    }
}

If you want to get all the errors throwing at the compilation, then use results.Errors. You can make a textbox at the bottom of your IDE which can show the errors. The same goes for output.

Now we just need to make the compilation done.
Click on the Compile And Run.
You should get this code:

        private void compileAndRunToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

Replace it with:

        private void compileAndRunToolStripMenuItem_Click(object sender, EventArgs e)
        {
            bool exe = false;
            bool run = true;

            if (radioButton2.Checked)
                exe = true;
            else
            {
                run = false;
                exe = false;
            }

            string[] References = new string[listBox1.Items.Count];
            for (int i = 0; i < References.Length; i++)
                References[i] = @"References\" + listBox1.Items[i].ToString();

            if (!Directory.Exists(Environment.CurrentDirectory + @"\Builds"))
            {
                DirectoryInfo dir = new DirectoryInfo(Environment.CurrentDirectory + @"\Builds");
                dir.Create();
            }

            string Code = "";
            foreach (Control ctrl in tabControl1.Controls)
                if (ctrl is TabPage)
                {
                    foreach (Control Ctrl in ctrl.Controls)
                        if (Ctrl is RichTextBox)
                        {
                            Code = Ctrl.Text;
                        }
                }

            Compiler compiler = new Compiler(@"Builds\" + textBox1.Text, exe, Code, References, run);
        }

Now click on the Compile Only and you should get this code:

        private void compileOnlyToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

Replace it with:

        private void compileOnlyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            bool exe = false;

            if (radioButton2.Checked)
                exe = true;
            else
                exe = false;

            string[] References = new string[listBox1.Items.Count];
            for (int i = 0; i < References.Length; i++)
                References[i] = @"References\" + listBox1.Items[i].ToString();

            if (!Directory.Exists(Environment.CurrentDirectory + @"\Builds"))
            {
                DirectoryInfo dir = new DirectoryInfo(Environment.CurrentDirectory + @"\Builds");
                dir.Create();
            }

            string Code = "";
            foreach (Control ctrl in tabControl1.Controls)
                if (ctrl is TabPage)
                {
                    foreach (Control Ctrl in ctrl.Controls)
                        if (Ctrl is RichTextBox)
                        {
                            Code = Ctrl.Text;
                        }
                }

            Compiler compiler = new Compiler(@"Builds\" + textBox1.Text, exe, Code, References, false);
        }

Now you have your own simple C# Compiler.
I hope you liked it and find it useful.

[w00tare]

Nice, did you make this tutorial?

[KraHen]

You`re not creating a compiler, you`re just using the Microsoft.CSharp.CSharpCodeprovider class to compile your program. The two things are waaay different.

Though I can see how this can be useful for those who don`t know about it.

[Syst3m_W1z4rd]

Originally Posted by w00tare

Nice, did you make this tutorial?

No I ripped. Seriously, what do you think?

Originally Posted by KraHen

You`re not creating a compiler, you`re just using the Microsoft.CSharp.CSharpCodeprovider class to compile your program. The two things are waaay different.

Though I can see how this can be useful for those who don`t know about it.

That's true. It's more an IDE, but it's still compiling the code. If it should be a real compiler, then you would be using only the CLI.

[ruslan2012]

Give me please the complete code(I have problems and errors!)

[I don't have a username]

We're talking about an ancient bump to my thread, but uhmmm I don't have it. What is your error?