RuleConditionDialog.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Rules / Design / Dialogs / RuleConditionDialog.cs / 1305376 / RuleConditionDialog.cs
                        
                        
                            // ---------------------------------------------------------------------------- 
// Copyright (C) 2006 Microsoft Corporation All Rights Reserved
// ---------------------------------------------------------------------------

#define CODE_ANALYSIS 
using System.CodeDom;
using System.ComponentModel; 
using System.ComponentModel.Design; 
using System.Diagnostics.CodeAnalysis;
using System.Drawing; 
using System.Globalization;
using System.Reflection;
using System.Windows.Forms;
using System.Windows.Forms.Design; 
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Compiler; 
using System.Workflow.ComponentModel.Design; 

namespace System.Workflow.Activities.Rules.Design 
{
    public partial class RuleConditionDialog : Form
    {
        RuleExpressionCondition ruleExpressionCondition = new RuleExpressionCondition(); 
        private IServiceProvider serviceProvider;
        private Parser ruleParser; 
        private Exception syntaxException; 
        private bool wasOKed;
 
        public RuleConditionDialog(Activity activity, CodeExpression expression)
        {
            if (activity == null)
                throw (new ArgumentNullException("activity")); 

            InitializeComponent(); 
 
            ITypeProvider typeProvider;
            serviceProvider = activity.Site; 
            if (serviceProvider != null)
            {
                IUIService uisvc = serviceProvider.GetService(typeof(IUIService)) as IUIService;
                if (uisvc != null) 
                    this.Font = (Font)uisvc.Styles["DialogFont"];
                typeProvider = (ITypeProvider)serviceProvider.GetService(typeof(ITypeProvider)); 
                if (typeProvider == null) 
                {
                    string message = string.Format(CultureInfo.CurrentCulture, Messages.MissingService, typeof(ITypeProvider).FullName); 
                    throw new InvalidOperationException(message);
                }

                WorkflowDesignerLoader loader = serviceProvider.GetService(typeof(WorkflowDesignerLoader)) as WorkflowDesignerLoader; 
                if (loader != null)
                    loader.Flush(); 
            } 
            else
            { 
                // no service provider, so make a TypeProvider that has all loaded Assemblies
                TypeProvider newProvider = new TypeProvider(null);
                foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())
                    newProvider.AddAssembly(a); 
                typeProvider = newProvider;
            } 
 
            RuleValidation validation = new RuleValidation(activity, typeProvider, false);
            this.ruleParser = new Parser(validation); 

            InitializeDialog(expression);
        }
 
        public RuleConditionDialog(Type activityType, ITypeProvider typeProvider, CodeExpression expression)
        { 
            if (activityType == null) 
                throw (new ArgumentNullException("activityType"));
 
            InitializeComponent();

            RuleValidation validation = new RuleValidation(activityType, typeProvider);
            this.ruleParser = new Parser(validation); 

            InitializeDialog(expression); 
        } 

        private void InitializeDialog(CodeExpression expression) 
        {
            HelpRequested += new HelpEventHandler(OnHelpRequested);
            HelpButtonClicked += new CancelEventHandler(OnHelpClicked);
 
            if (expression != null)
            { 
                this.ruleExpressionCondition.Expression = RuleExpressionWalker.Clone(expression); 
                this.conditionTextBox.Text = ruleExpressionCondition.ToString().Replace("\n", "\r\n");
            } 
            else
                this.conditionTextBox.Text = string.Empty;

            this.conditionTextBox.PopulateAutoCompleteList += new EventHandler(ConditionTextBox_PopulateAutoCompleteList); 
            this.conditionTextBox.PopulateToolTipList += new EventHandler(ConditionTextBox_PopulateAutoCompleteList);
 
            try 
            {
                this.ruleParser.ParseCondition(this.conditionTextBox.Text); 
                conditionErrorProvider.SetError(this.conditionTextBox, string.Empty);
            }
            catch (RuleSyntaxException ex)
            { 
                conditionErrorProvider.SetError(this.conditionTextBox, ex.Message);
            } 
        } 

 
        public CodeExpression Expression
        {
            get
            { 
                return this.ruleExpressionCondition.Expression;
            } 
        } 

 
        private void ConditionTextBox_PopulateAutoCompleteList(object sender, AutoCompletionEventArgs e)
        {
            e.AutoCompleteValues = this.ruleParser.GetExpressionCompletions(e.Prefix);
        } 

 
 		[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")] 
		private void conditionTextBox_Validating(object sender, CancelEventArgs e)
        { 
            try
            {
                this.ruleExpressionCondition = (RuleExpressionCondition)this.ruleParser.ParseCondition(this.conditionTextBox.Text);
 
                if (!string.IsNullOrEmpty(this.conditionTextBox.Text))
                    this.conditionTextBox.Text = this.ruleExpressionCondition.ToString().Replace("\n", "\r\n"); 
                conditionErrorProvider.SetError(this.conditionTextBox, string.Empty); 
                syntaxException = null;
            } 
            catch (Exception ex)
            {
                syntaxException = ex;
                conditionErrorProvider.SetError(this.conditionTextBox, ex.Message); 
            }
        } 
 

        private void OnHelpClicked(object sender, CancelEventArgs e) 
        {
            e.Cancel = true;
            ShowHelp();
        } 

 
        private void OnHelpRequested(object sender, HelpEventArgs e) 
        {
            ShowHelp(); 
        }


        private void ShowHelp() 
        {
            if (serviceProvider != null) 
            { 
                IHelpService helpService = serviceProvider.GetService(typeof(IHelpService)) as IHelpService;
                if (helpService != null) 
                {
                    helpService.ShowHelpFromKeyword(this.GetType().FullName+".UI");
                }
                else 
                {
                    IUIService uisvc = serviceProvider.GetService(typeof(IUIService)) as IUIService; 
                    if (uisvc != null) 
                        uisvc.ShowError(Messages.NoHelp);
                } 
            }
            else
            {
                IUIService uisvc = (IUIService)GetService(typeof(IUIService)); 
                if (uisvc != null)
                    uisvc.ShowError(Messages.NoHelp); 
            } 
        }
 

        private void okButton_Click(object sender, EventArgs e)
        {
            wasOKed = true; 
        }
 
        private void RuleConditionDialog_FormClosing(object sender, FormClosingEventArgs e) 
        {
            if (wasOKed && syntaxException != null) 
            {
                e.Cancel = true;
                DesignerHelpers.DisplayError(Messages.Error_ConditionParser + "\n" + syntaxException.Message, this.Text, this.serviceProvider);
                if(syntaxException is RuleSyntaxException) 
                    this.conditionTextBox.SelectionStart = ((RuleSyntaxException)syntaxException).Position;
                this.conditionTextBox.SelectionLength = 0; 
                this.conditionTextBox.ScrollToCaret(); 
                wasOKed = false;
            } 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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RuleConditionDialog.cs source code in C# .NET

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