/****************************** Module Header ******************************\

* Module Name:	SampleServiceInsert.xaml.cs

* Project:		CSADONETDataServiceSL3Client

* Copyright (c) Microsoft Corporation.

* 

* SampleServiceInsert.cs demonstrates how to call ASP.NET Data Service

* to select and insert records in Silverlight.

* 

* This source is subject to the Microsoft Public License.

* See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.

* All other rights reserved.

* 

* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 

* EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 

* WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

\***************************************************************************/



using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using CSADONETDataServiceSL3Client.SampleService;

using System.Data.Services.Client;



namespace CSADONETDataServiceSL3Client

{

    public partial class SampleServiceInsert : UserControl

    {

        // The URL of ADO.NET Data Service

        private const string _sampleUri =

             "http://localhost:8888/Samples.svc";

        // returnedCategory => _context ={via async REST call}=> ADO.NET Data Service

        private SampleProjects _context;

        public SampleServiceInsert()

        {

            InitializeComponent();

            this.Loaded += new RoutedEventHandler(SampleServiceInsert_Loaded);

        }



        void SampleServiceInsert_Loaded(object sender, RoutedEventArgs e)

        {

            LoadData();

        }



        /// <summary>

        /// In this method we send a REST request to ADO.NET Data Service to request Category

        /// records. 

        /// </summary>

        private void LoadData()

        {

            _context = new SampleProjects(new Uri(_sampleUri));

            DataServiceQuery<Category> query = (DataServiceQuery<Category>)(

                from c in _context.Categories

                select c);



            query.BeginExecute(OnCategoryQueryComplete, query);

        }



        /// <summary>

        /// Callback method of the query to get Category records.

        /// </summary>

        /// <param name="result"></param>

        private void OnCategoryQueryComplete(IAsyncResult result)

        {

            Dispatcher.BeginInvoke(() =>

            {



                DataServiceQuery<Category> query =

                       result.AsyncState as DataServiceQuery<Category>;

                try

                {

                    var returnedCategory =

                        query.EndExecute(result);



                    if (returnedCategory != null)

                    {



                        this.mainDataGrid.ItemsSource = returnedCategory.ToList();

                    }

                }

                catch (DataServiceQueryException ex)

                {

                    this.messageTextBlock.Text = string.Format("Error: {0} - {1}",

                        ex.Response.StatusCode.ToString(), ex.Response.Error.Message);

                }

            });



        }



        /// <summary>

        /// In this event handler, we begin to send a REST request to ADO.NET

        /// Data Service to insert a new Category.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void InsertButton_Click(object sender, RoutedEventArgs e)

        {

            string categorynameforinsert = this.categoryTextBox.Text;

            _context.AddToCategories(new Category() { CategoryName = categorynameforinsert });

            _context.BeginSaveChanges(OnChangesSaved, _context);

        } 

        

        /// <summary>

        /// Callback method of the insert operation.

        /// </summary>

        /// <param name="result"></param>

        private void OnChangesSaved(IAsyncResult result)

        {

            Dispatcher.BeginInvoke(() =>

            {

                SampleProjects svcContext = result.AsyncState as SampleProjects;



                try

                {

                    // Complete the save changes operation and display the response.

                    WriteOperationResponse(svcContext.EndSaveChanges(result));

                }

                catch (DataServiceRequestException ex)

                {

                    // Display the error from the response.

                    WriteOperationResponse(ex.Response);

                }

                catch (InvalidOperationException ex)

                {

                    messageTextBlock.Text = ex.Message;

                }

                finally

                {

                    // Reload the binding collection to refresh Grid to see if it's successfully updated. 

                    // You can also remove the following line. To see the update effect, just refresh the page or check out database directly.

                    LoadData();

                }

            });



        } 

        

        /// <summary>

        /// This method shows details information of the response from ADO.NET Data Service.

        /// </summary>

        /// <param name="response"></param>

        private void WriteOperationResponse(DataServiceResponse response)

        {

            messageTextBlock.Text = string.Empty;

            int i = 1;



            if (response.IsBatchResponse)

            {

                messageTextBlock.Text = string.Format("Batch operation response code: {0}\n",

                    response.BatchStatusCode);

            }

            foreach (ChangeOperationResponse change in response)

            {

                messageTextBlock.Text +=

                    string.Format("\tChange {0} code: {1}\n",

                    i.ToString(), change.StatusCode.ToString());

                if (change.Error != null)

                {

                    string.Format("\tChange {0} error: {1}\n",

                        i.ToString(), change.Error.Message);

                }

                i++;

            }

        }

    }

}