OperationPickerDialog.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / Workflow / Activities / Design / OperationPickerDialog.cs / 1305376 / OperationPickerDialog.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Workflow.Activities.Design 
{
    using System; 
    using System.Collections.Generic; 
    using System.ComponentModel;
    using System.Drawing; 
    using System.Reflection;
    using System.Runtime;
    using System.ServiceModel;
    using System.Windows.Forms; 
    using System.Windows.Forms.Design;
    using System.Workflow.Activities; 
    using System.Workflow.ComponentModel; 
    using System.Workflow.ComponentModel.Design;
 
    partial class OperationPickerDialog : Form
    {
        private OperationInfoBase selectedOperation;
        private ServiceContractListItemList serviceContracts; 
        private IServiceProvider serviceProvider = null;
 
        public OperationPickerDialog(IServiceProvider serviceProvider, bool allowNewContracts) 
        {
            if (serviceProvider == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceProvider");
            }
            this.serviceProvider = serviceProvider; 
            //Set dialog fonts
            IUIService uisvc = (IUIService) this.serviceProvider.GetService(typeof(IUIService)); 
            if (uisvc != null) 
            {
                this.Font = (Font) uisvc.Styles["DialogFont"]; 
            }
            InitializeComponent();
            this.serviceContracts = new ServiceContractListItemList(this.operationsListBox);
            this.operationsListBox.ServiceProvider = this.serviceProvider; 
            this.toolStripButton1.Visible = allowNewContracts;
        } 
 
        public OperationInfoBase SelectedOperation
        { 
            get
            {
                return selectedOperation;
            } 
            internal set
            { 
                if (value == null) 
                {
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value"); 
                }
                selectedOperation = value;
                SelectServiceOperation(value);
            } 
        }
 
        public void AddServiceOperation(OperationInfoBase operationInfo, Activity implementingActivity) 
        {
            if (operationInfo == null) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("operationInfo");
            }
 
            TypedOperationInfo typedOperationInfo = operationInfo as TypedOperationInfo;
            OperationInfo workflowOperationInfo = operationInfo as OperationInfo; 
            string contractName = operationInfo.GetContractFullName(null); 
            // Do not add operation if the contractName is not valid. Not throwing here gives the user to fix
            // a broken contract/operation by selecting a different operation from the UI. 
            if (String.IsNullOrEmpty(contractName))
            {
                return;
            } 
            ServiceContractListItem serviceContract = this.serviceContracts.Find(contractName);
 
            if (typedOperationInfo != null) 
            {
                if (serviceContract == null) 
                {
                    serviceContract = new ServiceContractListItem(this.operationsListBox);
                    serviceContract.Validating += new CancelEventHandler(ServiceContractValidating);
                    serviceContract.Name = contractName; 
                    serviceContract.ContractType = typedOperationInfo.ContractType;
                    serviceContract.IsCustomContract = false; 
                    AddServiceContract(serviceContract); 
                }
 
                TypedServiceOperationListItem operationItem = new TypedServiceOperationListItem();
                operationItem.Validating += new CancelEventHandler(ServiceOperationValidating);
                operationItem.Name = typedOperationInfo.Name;
                operationItem.Operation = typedOperationInfo; 

                operationItem.ImplementingActivities.Add(implementingActivity); 
                serviceContract.AddOperation(operationItem); 
            }
            else if (workflowOperationInfo != null) 
            {
                if (serviceContract == null)
                {
                    serviceContract = new ServiceContractListItem(this.operationsListBox); 
                    serviceContract.Validating += new CancelEventHandler(ServiceContractValidating);
                    serviceContract.Name = workflowOperationInfo.ContractName; 
                    serviceContract.IsCustomContract = true; 
                    AddServiceContract(serviceContract);
                } 
                WorkflowServiceOperationListItem workflowOperationItem = new WorkflowServiceOperationListItem();
                workflowOperationItem.Validating += new CancelEventHandler(ServiceOperationValidating);
                workflowOperationItem.Operation = workflowOperationInfo;
                workflowOperationItem.ImplementingActivities.Add(implementingActivity); 
                serviceContract.AddOperation(workflowOperationItem);
            } 
 
        }
 
        protected override void OnHelpButtonClicked(CancelEventArgs e)
        {
            e.Cancel = true;
            GetHelp(); 
        }
 
        protected override void OnHelpRequested(HelpEventArgs e) 
        {
            e.Handled = true; 
            GetHelp();
        }

        private void AddHelpListItem() 
        {
            if (this.operationsListBox.Items.Count == 0) 
            { 
                this.operationsListBox.Items.Add(new HelpListItem());
            } 
        }

        private void addOperationButton_Click(object sender, EventArgs e)
        { 
            ServiceContractListItem serviceContractListItem = this.operationsListBox.SelectedItem as ServiceContractListItem;
            Fx.Assert(serviceContractListItem != null, "service contract list item cannot be null"); 
            Fx.Assert(serviceContractListItem.IsCustomContract, " this should work only on a custom contract item"); 
            WorkflowServiceOperationListItem newWorkflowServiceOperationListItem = serviceContractListItem.CreateOperation();
            newWorkflowServiceOperationListItem.Validating += new CancelEventHandler(ServiceOperationValidating); 
            this.AddServiceOperation(newWorkflowServiceOperationListItem);
            serviceContractListItem.SelectionOperation(newWorkflowServiceOperationListItem);
        }
 
        private void AddServiceContract(ServiceContractListItem serviceContractListItem)
        { 
            String key = serviceContractListItem.Name; 
            if (this.serviceContracts.Find(key) == null)
            { 
                RemoveHelpListItem();
                serviceContracts.Add(serviceContractListItem);
                operationsListBox.Items.Add(serviceContractListItem);
            } 
        }
        private void AddServiceOperation(ServiceOperationListItem serviceOperation) 
        { 
            if (serviceOperation == null)
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("serviceOperation");
            }
            String key = serviceOperation.ContractName;
            ServiceContractListItem serviceContract = this.serviceContracts.Find(key); 
            serviceContract.AddOperation(serviceOperation);
            serviceContract.SelectionOperation(serviceOperation); 
        } 

        private void cancelButton_Click(object sender, EventArgs e) 
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        } 

        private void GetHelp() 
        { 
            DesignerHelpers.ShowHelpFromKeyword(this.serviceProvider, typeof(OperationPickerDialog).FullName + ".UI");
        } 
        private List GetMethodsFromInterface(Type serviceContractInterfaceType)
        {
            List methodInfos = new List();
            Queue interfacesQueue = new Queue(); 
            List interfacesList = new List();
            interfacesQueue.Enqueue(serviceContractInterfaceType); 
 
            while (interfacesQueue.Count > 0)
            { 
                Type currentInterfaceType = interfacesQueue.Dequeue();
                interfacesList.Add(currentInterfaceType);
                foreach (Type baseInteface in currentInterfaceType.GetInterfaces())
                { 
                    if (!interfacesList.Contains(baseInteface))
                    { 
                        interfacesQueue.Enqueue(baseInteface); 
                    }
                } 
                methodInfos.AddRange(currentInterfaceType.GetMethods());
            }
            return methodInfos;
        } 

        private void ImportContract(Type serviceContractType) 
        { 

            foreach (MethodInfo methodInfo in GetMethodsFromInterface(serviceContractType)) 
            {
                if (!ServiceOperationHelpers.IsValidServiceOperation(methodInfo))
                {
                    continue; 
                }
                TypedServiceOperationListItem operationItem = new TypedServiceOperationListItem(); 
                operationItem.Validating += new CancelEventHandler(ServiceOperationValidating); 
                operationItem.Name = ServiceOperationHelpers.GetOperationName(this.serviceProvider, methodInfo);
                operationItem.Operation.ContractType = serviceContractType; 
                operationItem.Operation.Name = ServiceOperationHelpers.GetOperationName(this.serviceProvider, methodInfo);
                this.AddServiceOperation(operationItem);
            }
        } 

        void ImportContractButtonClicked(object sender, EventArgs e) 
        { 
            using (TypeBrowserDialog typeBrowserDialog = new TypeBrowserDialog(serviceProvider as IServiceProvider, new ServiceContractsTypeFilterProvider(), "System.String"))
            { 
                typeBrowserDialog.ShowDialog();
                if (typeBrowserDialog.SelectedType != null)
                {
                    ServiceContractListItem contractItem = new ServiceContractListItem(this.operationsListBox); 
                    contractItem.Validating += new CancelEventHandler(ServiceContractValidating);
                    contractItem.Name = typeBrowserDialog.SelectedType.FullName; 
                    contractItem.ContractType = typeBrowserDialog.SelectedType; 
                    contractItem.IsCustomContract = false;
                    CancelEventArgs cancelEventArgs = new CancelEventArgs(); 
                    contractItem.Validating.Invoke(contractItem, cancelEventArgs);
                    if (cancelEventArgs.Cancel)
                    {
                        return; 
                    }
                    AddServiceContract(contractItem); 
 
                    ImportContract(typeBrowserDialog.SelectedType);
                } 
            }
        }

        void NewContractButtonClicked(object sender, EventArgs e) 
        {
            ServiceContractListItem contractItem = this.serviceContracts.CreateWithUniqueName(); 
            contractItem.Validating += new CancelEventHandler(ServiceContractValidating); 
            contractItem.IsCustomContract = true;
            this.AddServiceContract(contractItem); 
            WorkflowServiceOperationListItem newWorkflowServiceOperationListItem = contractItem.CreateOperation();
            newWorkflowServiceOperationListItem.Validating += new CancelEventHandler(ServiceOperationValidating);
            this.AddServiceOperation(newWorkflowServiceOperationListItem);
            contractItem.SelectionOperation(newWorkflowServiceOperationListItem); 
        }
 
        private void okButton_Click(object sender, EventArgs e) 
        {
            object selectedObject = operationsListBox.SelectedItem; 
            if (selectedObject == null)
            {
                selectedOperation = null;
            } 
            if (selectedObject is TypedServiceOperationListItem)
            { 
                selectedOperation = ((TypedServiceOperationListItem) selectedObject).Operation; 
            }
            else if (selectedObject is WorkflowServiceOperationListItem) 
            {
                selectedOperation = ((WorkflowServiceOperationListItem) selectedObject).Operation;
            }
            else 
            {
                // dont close the dialog when contracts are selected 
                return; 
            }
            this.DialogResult = DialogResult.OK; 
            this.Close();
        }

        private void OperationPickerDialogLoad(object sender, EventArgs e) 
        {
            if (this.serviceContracts.Count == 0) 
            { 
                AddHelpListItem();
            } 
            foreach (ServiceContractListItem serviceContractListItem in this.serviceContracts)
            {
                if (!serviceContractListItem.IsCustomContract)
                { 
                    ImportContract(serviceContractListItem.ContractType);
                } 
            } 
            this.importContractButton.Click += new EventHandler(ImportContractButtonClicked);
            this.operationsListBox.DoubleClick += new EventHandler(operationsListBox_DoubleClick); 
            this.operationsListBox.SelectedIndexChanged += new EventHandler(operationsListBox_SelectedIndexChanged);
            this.addOperationButton.Click += new EventHandler(addOperationButton_Click);
            this.toolStripButton1.Click += new EventHandler(NewContractButtonClicked);
            this.okButton.Click += new EventHandler(okButton_Click); 

 
            // This is to make the selected operation the selected item in the operationsListBox. 
            // This needs to be done to work around the [....] bug causing selection events to not fire till form is loaded.
            if (this.selectedOperation != null) 
            {
                SelectServiceOperation(this.selectedOperation);
            }
            else // select the first operation if no selectedoperation is set 
            {
                if (operationsListBox.Items.Count > 0) 
                { 
                    operationsListBox.SetSelected(0, true);
                } 
            }
        }

 
        void operationsListBox_DoubleClick(object sender, EventArgs e)
        { 
            okButton_Click(sender, e); 
        }
 
        private void operationsListBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (operationsListBox.SelectedItemViewControl != null)
            { 
                this.addOperationButton.Visible = false;
                detailsViewPanel.Visible = false; 
                // Give the old details control a chance to valiadte its fields before tearing it down. 
                foreach (Control control in detailsViewPanel.Controls)
                { 
                    UserControl userControl = control as UserControl;
                    if (userControl != null)
                    {
                        userControl.ValidateChildren(); 
                    }
                } 
                detailsViewPanel.Controls.Clear(); 
                operationsListBox.SelectedItemViewControl.Dock = DockStyle.Fill;
                detailsViewPanel.Controls.Add(operationsListBox.SelectedItemViewControl); 
                detailsViewPanel.Visible = true;
                if (operationsListBox.SelectedItem is ServiceOperationListItem)
                {
                    this.okButton.Enabled = true; 
                }
                else 
                { 
                    this.okButton.Enabled = false;
                    ServiceContractListItem serviceContractListItem = this.operationsListBox.SelectedItem as ServiceContractListItem; 
                    if ((serviceContractListItem != null) && (serviceContractListItem.IsCustomContract))
                    {
                        this.addOperationButton.Visible = true;
                    } 
                }
            } 
 
        }
 
        private void RemoveHelpListItem()
        {
            if (this.operationsListBox.Items.Count > 0 && this.operationsListBox.Items[0] is HelpListItem)
            { 
                this.operationsListBox.Items.Clear();
            } 
        } 

        private void SelectServiceOperation(OperationInfoBase operationInfo) 
        {
            Fx.Assert(operationInfo != null, "operationInfo cannot be null");
            ServiceContractListItem serviceContract = this.serviceContracts.Find(operationInfo.GetContractFullName(null));
            // Dont select operation if the contract cannot be found in the serviceContracts list 
            if (serviceContract == null)
            { 
                return; 
            }
            ServiceOperationListItem operationItem = null; 
            if (operationInfo is OperationInfo)
            {
                operationItem = new WorkflowServiceOperationListItem();
                operationItem.Validating += new CancelEventHandler(ServiceOperationValidating); 

                operationItem.Name = operationInfo.Name; 
                ((WorkflowServiceOperationListItem) operationItem).Operation = operationInfo as OperationInfo; 

            } 
            else if (operationInfo is TypedOperationInfo)
            {
                operationItem = new TypedServiceOperationListItem();
                operationItem.Validating += new CancelEventHandler(ServiceOperationValidating); 
                operationItem.Name = operationInfo.Name;
                ((TypedServiceOperationListItem) operationItem).Operation = operationInfo as TypedOperationInfo; 
            } 

            serviceContract.SelectionOperation(operationItem); 
        }

        void ServiceContractValidating(object sender, CancelEventArgs e)
        { 
            ServiceContractListItem serviceContractListItem = (ServiceContractListItem) sender;
 
            if (string.IsNullOrEmpty(serviceContractListItem.Name)) 
            {
                e.Cancel = true; 
                string errorString = SR2.GetString(SR2.ContractNameCannotBeEmpty);
                DesignerHelpers.ShowMessage(this.serviceProvider, errorString, System.Workflow.ComponentModel.Design.DR.GetString(System.Workflow.ComponentModel.Design.DR.WorkflowDesignerTitle), MessageBoxButtons.OK,
                    MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
 
            }
            bool duplicatesFound = false; 
            foreach (ServiceContractListItem foundContract in serviceContracts) 
            {
                if (foundContract == serviceContractListItem) 
                {
                    continue;
                }
 
                // allow reimport of existing imported contracts
                if (!serviceContractListItem.IsCustomContract && serviceContractListItem.ContractType.Equals(foundContract.ContractType)) 
                { 
                    continue;
                } 

                if (foundContract.Name.Equals(serviceContractListItem.Name))
                {
                    duplicatesFound = true; 
                    break;
                } 
 
            }
            // contract names must be unique 
            if (duplicatesFound)
            {

                e.Cancel = true; 
                string errorString = SR2.GetString(SR2.ContractNameMustBeUnique);
                DesignerHelpers.ShowMessage(this.serviceProvider, errorString, System.Workflow.ComponentModel.Design.DR.GetString(System.Workflow.ComponentModel.Design.DR.WorkflowDesignerTitle), MessageBoxButtons.OK, 
                    MessageBoxIcon.Error, MessageBoxDefaultButton.Button1); 

            } 
        }


 

        void ServiceOperationValidating(object sender, CancelEventArgs e) 
        { 

            ServiceOperationListItem serviceOperationListItem = (ServiceOperationListItem) sender; 
            string newOperationName = serviceOperationListItem.Name;
            string contractName = serviceOperationListItem.ContractName;
            if (string.IsNullOrEmpty(newOperationName))
            { 
                e.Cancel = true;
                string errorString = SR2.GetString(SR2.OperationNameCannotBeEmpty); 
                DesignerHelpers.ShowMessage(this.serviceProvider, errorString, System.Workflow.ComponentModel.Design.DR.GetString(System.Workflow.ComponentModel.Design.DR.WorkflowDesignerTitle), MessageBoxButtons.OK, 
                    MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
            } 

            Fx.Assert(!string.IsNullOrEmpty(contractName), "contract name should be valid to run this check");
            ServiceContractListItem contractListItem = serviceContracts.Find(contractName);
            Fx.Assert(contractListItem != null, "contract should be present in the list to run this check"); 

            // operation names must be unique inside a contract 
            bool duplicatesFound = false; 
            foreach (ServiceOperationListItem foundOperation in contractListItem.Operations)
            { 
                if (foundOperation == serviceOperationListItem)
                {
                    continue;
                } 
                if (foundOperation.Name.Equals(newOperationName))
                { 
                    duplicatesFound = true; 
                    break;
                } 

            }
            if (duplicatesFound)
            { 

                e.Cancel = true; 
                string errorString = SR2.GetString(SR2.OperationNameMustBeUnique); 
                DesignerHelpers.ShowMessage(this.serviceProvider, errorString, System.Workflow.ComponentModel.Design.DR.GetString(System.Workflow.ComponentModel.Design.DR.WorkflowDesignerTitle), MessageBoxButtons.OK,
                    MessageBoxIcon.Error, MessageBoxDefaultButton.Button1); 

            }

        } 

        [ListItemView(typeof(HelpListItemViewControl))] 
        [ListItemDetailView(typeof(ListItemViewControl))] 
        private class HelpListItem
        { 
        }

        private class HelpListItemViewControl : ListItemViewControl
        { 

            protected override void OnLoad(EventArgs e) 
            { 
                this.Width = this.Parent.Width - 10;
                Label label = new Label(); 
                label.ForeColor = System.Drawing.SystemColors.GrayText;
                label.Dock = DockStyle.Fill;
                this.Font = new Font(this.Font, FontStyle.Italic);
                label.Text = SR2.GetString(SR2.AddOperationsUsingImportAddButtons); 
                this.Controls.Add(label);
            } 
        } 

        private class ServiceContractsTypeFilterProvider : ITypeFilterProvider 
        {

            string ITypeFilterProvider.FilterDescription
            { 
                get { return SR2.GetString(SR2.ChooseAServiceContractFromBelow); }
            } 
            bool ITypeFilterProvider.CanFilterType(Type type, bool throwOnError) 
            {
                if (!type.IsInterface) 
                {
                    return false;
                }
                if (type.IsDefined(typeof(ServiceContractAttribute), true)) 
                {
                    return true; 
                } 
                else
                { 
                    return false;
                }
            }
        } 

 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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