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Using Reflection.Emit to Precompile Expressions to MSIL

, 6 Jan 2009 CPOL
The classes in this project allow you to parse text expressions entered by a user and compile them to a .NET assembly. This assembly can be executed on the fly, or saved to a DLL.
MSILParserProject.zip
MSILParserProject
MSILParser
bin
Debug
MSILParser.vshost.exe
ClassDiagram1.cd
ildasm.exe
MSILParser.csproj.user
MSILParser_TemporaryKey.pfx
Properties
Settings.settings
namespace MSILParser
{
    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()
        {
            this.btnParse = new System.Windows.Forms.Button();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.numericUpDown1 = new System.Windows.Forms.NumericUpDown();
            this.lblResults = new System.Windows.Forms.Label();
            this.lblTrials = new System.Windows.Forms.Label();
            this.txtMsil = new System.Windows.Forms.TextBox();
            this.lblMsil = new System.Windows.Forms.Label();
            this.lblExpression = new System.Windows.Forms.Label();
            ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).BeginInit();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.btnParse.Location = new System.Drawing.Point(370, 22);
            this.btnParse.Name = "button1";
            this.btnParse.Size = new System.Drawing.Size(127, 29);
            this.btnParse.TabIndex = 0;
            this.btnParse.Text = "Parse";
            this.btnParse.UseVisualStyleBackColor = true;
            this.btnParse.Click += new System.EventHandler(this.button1_Click);
            // 
            // textBox1
            // 
            this.textBox1.AcceptsReturn = true;
            this.textBox1.AcceptsTab = true;
            this.textBox1.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.textBox1.ForeColor = System.Drawing.Color.MediumBlue;
            this.textBox1.Location = new System.Drawing.Point(12, 22);
            this.textBox1.Multiline = true;
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(344, 83);
            this.textBox1.TabIndex = 1;
            this.textBox1.Text = "(a * 1.5) + 2 * (4 / 11.3)";
            this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
            // 
            // numericUpDown1
            // 
            this.numericUpDown1.Increment = new decimal(new int[] {
            1000000,
            0,
            0,
            0});
            this.numericUpDown1.Location = new System.Drawing.Point(569, 22);
            this.numericUpDown1.Maximum = new decimal(new int[] {
            1000000000,
            0,
            0,
            0});
            this.numericUpDown1.Minimum = new decimal(new int[] {
            1,
            0,
            0,
            0});
            this.numericUpDown1.Name = "numericUpDown1";
            this.numericUpDown1.Size = new System.Drawing.Size(112, 20);
            this.numericUpDown1.TabIndex = 3;
            this.numericUpDown1.Value = new decimal(new int[] {
            1000000,
            0,
            0,
            0});
            // 
            // lblResults
            // 
            this.lblResults.AutoSize = true;
            this.lblResults.Location = new System.Drawing.Point(367, 58);
            this.lblResults.Name = "lblResults";
            this.lblResults.Size = new System.Drawing.Size(0, 13);
            this.lblResults.TabIndex = 6;
            // 
            // lblTrials
            // 
            this.lblTrials.AutoSize = true;
            this.lblTrials.Location = new System.Drawing.Point(517, 25);
            this.lblTrials.Name = "lblTrials";
            this.lblTrials.Size = new System.Drawing.Size(56, 13);
            this.lblTrials.TabIndex = 7;
            this.lblTrials.Text = "# of trials: ";
            // 
            // txtMsil
            // 
            this.txtMsil.AcceptsReturn = true;
            this.txtMsil.AcceptsTab = true;
            this.txtMsil.BackColor = System.Drawing.SystemColors.Window;
            this.txtMsil.Font = new System.Drawing.Font("Courier New", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.txtMsil.Location = new System.Drawing.Point(12, 136);
            this.txtMsil.MaxLength = 200000;
            this.txtMsil.Multiline = true;
            this.txtMsil.Name = "txtMsil";
            this.txtMsil.ReadOnly = true;
            this.txtMsil.ScrollBars = System.Windows.Forms.ScrollBars.Both;
            this.txtMsil.Size = new System.Drawing.Size(669, 306);
            this.txtMsil.TabIndex = 8;
            // 
            // lblMsil
            // 
            this.lblMsil.AutoSize = true;
            this.lblMsil.Location = new System.Drawing.Point(12, 120);
            this.lblMsil.Name = "lblMsil";
            this.lblMsil.Size = new System.Drawing.Size(44, 13);
            this.lblMsil.TabIndex = 9;
            this.lblMsil.Text = "IL Code";
            // 
            // lblExpression
            // 
            this.lblExpression.AutoSize = true;
            this.lblExpression.Location = new System.Drawing.Point(12, 6);
            this.lblExpression.Name = "lblExpression";
            this.lblExpression.Size = new System.Drawing.Size(58, 13);
            this.lblExpression.TabIndex = 10;
            this.lblExpression.Text = "Expression";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(689, 450);
            this.Controls.Add(this.numericUpDown1);
            this.Controls.Add(this.lblExpression);
            this.Controls.Add(this.lblMsil);
            this.Controls.Add(this.txtMsil);
            this.Controls.Add(this.lblTrials);
            this.Controls.Add(this.lblResults);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.btnParse);
            this.Name = "Form1";
            this.Text = "MSIL Expression Compiler";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button btnParse;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.NumericUpDown numericUpDown1;
        private System.Windows.Forms.Label lblResults;
        private System.Windows.Forms.Label lblTrials;
        private System.Windows.Forms.TextBox txtMsil;
        private System.Windows.Forms.Label lblMsil;
        private System.Windows.Forms.Label lblExpression;
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Steve Marsh
Software Developer (Senior)
United States United States
Stephen Marsh has over 10 years of experience developing enterprise applications built on the .Net framework. He specializes in building expert systems that serve the financial industry.

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