Add GetPage<TPage> and AddPageFactory<TPage and TPageFactory> methods

src/UglyToad.PdfPig.Tests/Integration/PageFactoryTests.cs

@@ -0,0 +1,280 @@
+namespace UglyToad.PdfPig.Tests.Integration
+{
+    using Content;
+    using Outline.Destinations;
+    using PdfPig.Core;
+    using PdfPig.Filters;
+    using PdfPig.Geometry;
+    using PdfPig.Graphics.Operations;
+    using PdfPig.Parser;
+    using PdfPig.Tokenization.Scanner;
+    using PdfPig.Tokens;
+    using System;
+    using System.Collections.Generic;
+    using Xunit;
+
+    public class PageFactoryTests
+    {
+        [Fact]
+        public void SimpleFactory1()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("ICML03-081");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                document.AddPageFactory<SimplePage, SimplePageFactory>();
+
+                for (int p = 1; p < document.NumberOfPages; p++)
+                {
+                    var page = document.GetPage(p);
+                    var pageInfo = document.GetPage<SimplePage>(p);
+
+                    Assert.Equal(page.Number, pageInfo.Number);
+                    Assert.Equal(page.Rotation.Value, pageInfo.Rotation);
+                    Assert.Equal(page.MediaBox.Bounds, pageInfo.MediaBox.Bounds);
+                }
+            }
+        }
+
+        [Fact]
+        public void SimpleFactory2()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("cat-genetics");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                document.AddPageFactory(new SimplePageFactory());
+
+                var page = document.GetPage(1);
+                var pageInfo = document.GetPage<SimplePage>(1);
+
+                Assert.Equal(page.Number, pageInfo.Number);
+                Assert.Equal(page.Rotation.Value, pageInfo.Rotation);
+                Assert.Equal(page.MediaBox.Bounds, pageInfo.MediaBox.Bounds);
+
+                // Run again
+                pageInfo = document.GetPage<SimplePage>(1);
+                Assert.Equal(page.Number, pageInfo.Number);
+                Assert.Equal(page.Rotation.Value, pageInfo.Rotation);
+                Assert.Equal(page.MediaBox.Bounds, pageInfo.MediaBox.Bounds);
+            }
+        }
+
+        [Fact]
+        public void InformationFactory()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("Gamebook");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                document.AddPageFactory<PageInformation, PageInformationFactory>();
+
+                for (int p = 1; p < document.NumberOfPages; p++)
+                {
+                    var page = document.GetPage(p);
+
+                    var pageInfo = document.GetPage<PageInformation>(p);
+                    Assert.Equal(page.Number, pageInfo.Number);
+                    Assert.Equal(page.Rotation, pageInfo.Rotation);
+                    Assert.Equal(page.Width, pageInfo.Width);
+                    Assert.Equal(page.Height, pageInfo.Height);
+
+                    // Run again
+                    pageInfo = document.GetPage<PageInformation>(p);
+                    Assert.Equal(page.Number, pageInfo.Number);
+                    Assert.Equal(page.Rotation, pageInfo.Rotation);
+                    Assert.Equal(page.Width, pageInfo.Width);
+                    Assert.Equal(page.Height, pageInfo.Height);
+                }
+            }
+        }
+
+        [Fact]
+        public void SimpleAndInformationFactory()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("DeviceN_CS_test");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                document.AddPageFactory<PageInformation, PageInformationFactory>();
+                document.AddPageFactory<SimplePage, SimplePageFactory>();
+
+                for (int p = 1; p < document.NumberOfPages; p++)
+                {
+                    var page = document.GetPage(p);
+
+                    var pageInfo = document.GetPage<PageInformation>(p);
+                    Assert.Equal(page.Number, pageInfo.Number);
+                    Assert.Equal(page.Rotation, pageInfo.Rotation);
+                    Assert.Equal(page.Width, pageInfo.Width);
+                    Assert.Equal(page.Height, pageInfo.Height);
+
+                    var simplePage = document.GetPage<SimplePage>(p);
+                    Assert.Equal(page.Number, simplePage.Number);
+                    Assert.Equal(page.Rotation.Value, simplePage.Rotation);
+                    Assert.Equal(page.MediaBox.Bounds, simplePage.MediaBox.Bounds);
+                }
+            }
+        }
+
+        [Fact]
+        public void NoPageFactory()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("cat-genetics");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                var exception = Assert.Throws<InvalidOperationException>(() => document.GetPage<SimplePage>(1));
+                Assert.StartsWith("Could not find page factory of type", exception.Message);
+            }
+        }
+
+        [Fact]
+        public void WrongSignatureFactory()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("Gamebook");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                var exception = Assert.Throws<InvalidOperationException>(() =>
+                    document.AddPageFactory<PageInformation, WrongConstructorFactory>());
+                Assert.StartsWith("Could not find valid constructor for page factory of type ", exception.Message);
+            }
+        }
+
+        #region Wrong
+
+        public class WrongConstructorFactory : BasePageFactory<PageInformation>
+        {
+            public WrongConstructorFactory(
+                IResourceStore resourceStore,
+                ILookupFilterProvider filterProvider,
+                IPageContentParser pageContentParser,
+                ParsingOptions parsingOptions)
+                : base(null, resourceStore, filterProvider, pageContentParser, parsingOptions)
+            {
+            }
+
+            protected override PageInformation ProcessPage(int pageNumber,
+                DictionaryToken dictionary,
+                NamedDestinations namedDestinations,
+                MediaBox mediaBox,
+                CropBox cropBox,
+                UserSpaceUnit userSpaceUnit,
+                PageRotationDegrees rotation,
+                TransformationMatrix initialMatrix,
+                IReadOnlyList<IGraphicsStateOperation> operations)
+            {
+                throw new Exception();
+            }
+        }
+
+        #endregion
+
+        #region SimplePage
+
+        public sealed class SimplePage
+        {
+            public int Number { get; }
+
+            public int Rotation { get; }
+
+            public MediaBox MediaBox { get; }
+
+            public SimplePage(int number, int rotation, MediaBox mediaBox)
+            {
+                Number = number;
+                Rotation = rotation;
+                MediaBox = mediaBox;
+            }
+        }
+
+        public sealed class SimplePageFactory : IPageFactory<SimplePage>
+        {
+            public SimplePageFactory()
+            {
+                // do nothing
+            }
+
+            public SimplePageFactory(
+                IPdfTokenScanner pdfScanner,
+                IResourceStore resourceStore,
+                ILookupFilterProvider filterProvider,
+                IPageContentParser pageContentParser,
+                ParsingOptions parsingOptions)
+            {
+                // do nothing
+            }
+
+            public SimplePage Create(int number,
+                DictionaryToken dictionary,
+                PageTreeMembers pageTreeMembers,
+                NamedDestinations namedDestinations)
+            {
+                return new SimplePage(number, pageTreeMembers.Rotation, pageTreeMembers.MediaBox);
+            }
+        }
+
+        #endregion
+
+        #region PageInformation
+
+        public readonly struct PageInformation
+        {
+            public int Number { get; }
+
+            public PageRotationDegrees Rotation { get; }
+
+            public double Width { get; }
+
+            public double Height { get; }
+
+            public UserSpaceUnit UserSpaceUnit { get; }
+
+            public PageInformation(int number,
+                PageRotationDegrees rotation,
+                double width,
+                double height,
+                UserSpaceUnit userSpaceUnit)
+            {
+                Number = number;
+                Rotation = rotation;
+                Width = width;
+                Height = height;
+                UserSpaceUnit = userSpaceUnit;
+            }
+        }
+
+        public sealed class PageInformationFactory : BasePageFactory<PageInformation>
+        {
+            public PageInformationFactory(
+                IPdfTokenScanner pdfScanner,
+                IResourceStore resourceStore,
+                ILookupFilterProvider filterProvider,
+                IPageContentParser pageContentParser,
+                ParsingOptions parsingOptions)
+                : base(pdfScanner, resourceStore, filterProvider, pageContentParser, parsingOptions)
+            {
+            }
+
+            protected override PageInformation ProcessPage(int pageNumber,
+                DictionaryToken dictionary,
+                NamedDestinations namedDestinations,
+                MediaBox mediaBox,
+                CropBox cropBox,
+                UserSpaceUnit userSpaceUnit,
+                PageRotationDegrees rotation,
+                TransformationMatrix initialMatrix,
+                IReadOnlyList<IGraphicsStateOperation> operations)
+            {
+                // Same logic as in Page class:
+                // Special case where cropbox is outside mediabox: use cropbox instead of intersection
+                var viewBox = mediaBox.Bounds.Intersect(cropBox.Bounds) ?? cropBox.Bounds;
+
+                return new PageInformation(pageNumber, rotation, viewBox.Width, viewBox.Height, userSpaceUnit);
+            }
+        }
+
+        #endregion
+    }
+}

src/UglyToad.PdfPig.Tests/Integration/StreamProcessorTests.cs

@@ -0,0 +1,257 @@
+namespace UglyToad.PdfPig.Tests.Integration
+{
+    using Content;
+    using Outline.Destinations;
+    using PdfFonts;
+    using PdfPig.Core;
+    using PdfPig.Filters;
+    using PdfPig.Geometry;
+    using PdfPig.Graphics;
+    using PdfPig.Graphics.Colors;
+    using PdfPig.Graphics.Operations;
+    using PdfPig.Parser;
+    using PdfPig.Tokenization.Scanner;
+    using PdfPig.Tokens;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Xunit;
+
+    public class StreamProcessorTests
+    {
+        [Fact]
+        public void TextOnly()
+        {
+            var file = IntegrationHelpers.GetDocumentPath("cat-genetics");
+
+            using (var document = PdfDocument.Open(file))
+            {
+                document.AddPageFactory<TextOnlyPage, TextOnlyPageInformationFactory>();
+
+                var page = document.GetPage(1);
+                var textOnlyPage = document.GetPage<TextOnlyPage>(1);
+
+                string expected = string.Concat(page.Letters.Select(l => l.Value));
+                Assert.Equal(expected, textOnlyPage.Text);
+            }
+        }
+
+        #region AdvancedPage
+
+        public readonly struct TextOnlyPage
+        {
+            public int Number { get; }
+
+            public string Text { get; }
+
+            public TextOnlyPage(int number, string text)
+            {
+                Number = number;
+                Text = text;
+            }
+        }
+
+        public readonly struct TextOnlyPageContent
+        {
+            public IReadOnlyList<string> Letters { get; }
+
+            public TextOnlyPageContent(IReadOnlyList<string> letters)
+            {
+                Letters = letters;
+            }
+        }
+
+        public class TextOnlyPageInformationFactory : BasePageFactory<TextOnlyPage>
+        {
+            public TextOnlyPageInformationFactory(
+                IPdfTokenScanner pdfScanner,
+                IResourceStore resourceStore,
+                ILookupFilterProvider filterProvider,
+                IPageContentParser pageContentParser,
+                ParsingOptions parsingOptions)
+                : base(pdfScanner, resourceStore, filterProvider, pageContentParser, parsingOptions)
+            {
+            }
+
+            protected override TextOnlyPage ProcessPage(int pageNumber,
+                DictionaryToken dictionary,
+                NamedDestinations namedDestinations,
+                MediaBox mediaBox,
+                CropBox cropBox,
+                UserSpaceUnit userSpaceUnit,
+                PageRotationDegrees rotation,
+                TransformationMatrix initialMatrix,
+                IReadOnlyList<IGraphicsStateOperation> operations)
+            {
+                if (operations.Count == 0)
+                {
+                    return new TextOnlyPage(pageNumber, string.Empty);
+                }
+
+                var context = new TextOnlyStreamProcessor(
+                    pageNumber,
+                    ResourceStore,
+                    PdfScanner,
+                    PageContentParser,
+                    FilterProvider,
+                    cropBox,
+                    userSpaceUnit,
+                    rotation,
+                    initialMatrix,
+                    ParsingOptions);
+
+                TextOnlyPageContent content = context.Process(pageNumber, operations);
+
+                return new TextOnlyPage(pageNumber, string.Concat(content.Letters));
+            }
+        }
+
+        public sealed class TextOnlyStreamProcessor : BaseStreamProcessor<TextOnlyPageContent>
+        {
+            private readonly List<string> _letters = new List<string>();
+
+            public TextOnlyStreamProcessor(int pageNumber,
+                IResourceStore resourceStore,
+                IPdfTokenScanner pdfScanner,
+                IPageContentParser pageContentParser,
+                ILookupFilterProvider filterProvider,
+                CropBox cropBox,
+                UserSpaceUnit userSpaceUnit,
+                PageRotationDegrees rotation,
+                TransformationMatrix initialMatrix,
+                ParsingOptions parsingOptions)
+                : base(pageNumber,
+                    resourceStore,
+                    pdfScanner,
+                    pageContentParser,
+                    filterProvider,
+                    cropBox,
+                    userSpaceUnit,
+                    rotation,
+                    initialMatrix,
+                    parsingOptions)
+            {
+            }
+
+            public override TextOnlyPageContent Process(int pageNumberCurrent,
+                IReadOnlyList<IGraphicsStateOperation> operations)
+            {
+                CloneAllStates();
+
+                ProcessOperations(operations);
+
+                return new TextOnlyPageContent(_letters);
+            }
+
+            public override void RenderGlyph(IFont font,
+                IColor strokingColor,
+                IColor nonStrokingColor,
+                TextRenderingMode textRenderingMode,
+                double fontSize,
+                double pointSize,
+                int code,
+                string unicode,
+                long currentOffset,
+                TransformationMatrix renderingMatrix,
+                TransformationMatrix textMatrix,
+                TransformationMatrix transformationMatrix,
+                CharacterBoundingBox characterBoundingBox)
+            {
+                _letters.Add(unicode);
+            }
+
+            protected override void RenderXObjectImage(XObjectContentRecord xObjectContentRecord)
+            {
+                // No op
+            }
+
+            public override void BeginSubpath()
+            {
+                // No op
+            }
+
+            public override PdfPoint? CloseSubpath()
+            {
+                return new PdfPoint();
+            }
+
+            public override void StrokePath(bool close)
+            {
+                // No op
+            }
+
+            public override void FillPath(FillingRule fillingRule, bool close)
+            {
+                // No op
+            }
+
+            public override void FillStrokePath(FillingRule fillingRule, bool close)
+            {
+                // No op
+            }
+
+            public override void MoveTo(double x, double y)
+            {
+                // No op
+            }
+
+            public override void BezierCurveTo(double x1, double y1, double x2, double y2, double x3, double y3)
+            {
+                // No op
+            }
+
+            public override void LineTo(double x, double y)
+            {
+                // No op
+            }
+
+            public override void Rectangle(double x, double y, double width, double height)
+            {
+                // No op
+            }
+
+            public override void EndPath()
+            {
+                // No op
+            }
+
+            public override void ClosePath()
+            {
+                // No op
+            }
+
+            public override void BeginMarkedContent(NameToken name,
+                NameToken propertyDictionaryName,
+                DictionaryToken properties)
+            {
+                // No op
+            }
+
+            public override void EndMarkedContent()
+            {
+                // No op
+            }
+
+            public override void ModifyClippingIntersect(FillingRule clippingRule)
+            {
+                // No op
+            }
+
+            public override void PaintShading(NameToken shadingName)
+            {
+                // No op
+            }
+
+            protected override void RenderInlineImage(InlineImage inlineImage)
+            {
+                // No op
+            }
+
+            public override void BezierCurveTo(double x2, double y2, double x3, double y3)
+            {
+                // No op
+            }
+        }
+
+        #endregion
+    }
+}

src/UglyToad.PdfPig/Content/Pages.cs

@@ -3,14 +3,17 @@
     using System;
     using System.Collections.Generic;
     using Core;
+    using Filters;
     using Outline.Destinations;
+    using Parser;
     using Tokenization.Scanner;
     using Tokens;
     using Util;
 
-    internal class Pages
+    internal sealed class Pages : IDisposable
     {
-        private readonly IPageFactory<Page> pageFactory;
+        private readonly Dictionary<Type, object> pageFactoryCache;
+        private readonly PageFactory defaultPageFactory;
         private readonly IPdfTokenScanner pdfScanner;
         private readonly Dictionary<int, PageTreeNode> pagesByNumber;
 
@@ -21,15 +24,38 @@
         /// </summary>
         public PageTreeNode PageTree { get; }
 
-        internal Pages(IPageFactory<Page> pageFactory, IPdfTokenScanner pdfScanner, PageTreeNode pageTree, Dictionary<int, PageTreeNode> pagesByNumber)
+        internal Pages(IPageFactory<Page> pageFactory,
+            IPdfTokenScanner pdfScanner,
+            PageTreeNode pageTree,
+            Dictionary<int, PageTreeNode> pagesByNumber)
         {
-            this.pageFactory = pageFactory ?? throw new ArgumentNullException(nameof(pageFactory));
+            pageFactoryCache = new Dictionary<Type, object>();
+
+            defaultPageFactory = (PageFactory)pageFactory ?? throw new ArgumentNullException(nameof(pageFactory));
             this.pdfScanner = pdfScanner ?? throw new ArgumentNullException(nameof(pdfScanner));
             this.pagesByNumber = pagesByNumber;
             PageTree = pageTree;
+
+            AddPageFactory(defaultPageFactory);
         }
 
-        internal Page GetPage(int pageNumber, NamedDestinations namedDestinations, ParsingOptions parsingOptions)
+        internal Page GetPage(int pageNumber, NamedDestinations namedDestinations, ParsingOptions parsingOptions) =>
+            GetPage(defaultPageFactory, pageNumber, namedDestinations, parsingOptions);
+
+        internal TPage GetPage<TPage>(int pageNumber, NamedDestinations namedDestinations, ParsingOptions parsingOptions)
+        {
+            if (pageFactoryCache.TryGetValue(typeof(TPage), out var f) && f is IPageFactory<TPage> pageFactory)
+            {
+                return GetPage(pageFactory, pageNumber, namedDestinations, parsingOptions);
+            }
+
+            throw new InvalidOperationException($"Could not find page factory of type '{typeof(IPageFactory<TPage>)}' for page type {typeof(TPage)}.");
+        }
+
+        private TPage GetPage<TPage>(IPageFactory<TPage> pageFactory,
+            int pageNumber,
+            NamedDestinations namedDestinations,
+            ParsingOptions parsingOptions)
         {
             if (pageNumber <= 0 || pageNumber > Count)
             {
@@ -80,6 +106,53 @@
             return page;
         }
 
+        internal void AddPageFactory<TPage>(IPageFactory<TPage> pageFactory)
+        {
+            Type type = typeof(TPage);
+            if (pageFactoryCache.ContainsKey(type))
+            {
+                throw new InvalidOperationException($"Could not add page factory for page type '{type}' as it was already added.");
+            }
+
+            pageFactoryCache.Add(type, pageFactory);
+        }
+
+        internal void AddPageFactory<TPage, TPageFactory>() where TPageFactory : IPageFactory<TPage>
+        {
+            var constructor = typeof(TPageFactory).GetConstructor(new[]
+            {
+                typeof(IPdfTokenScanner),
+                typeof(IResourceStore),
+                typeof(ILookupFilterProvider),
+                typeof(IPageContentParser),
+                typeof(ParsingOptions)
+            });
+
+            if (constructor == null)
+            {
+                throw new InvalidOperationException($"Could not find valid constructor for page factory of type '{typeof(TPageFactory)}'. " +
+                                                    "The page factory should have a constructor with the following parameters: " +
+                                                    $"{typeof(IPdfTokenScanner)}, {typeof(IResourceStore)}, {typeof(ILookupFilterProvider)}, {typeof(IPageContentParser)}, {typeof(ParsingOptions)}.");
+            }
+
+            var instance = constructor.Invoke(new object[]
+            {
+                defaultPageFactory.PdfScanner,
+                defaultPageFactory.ResourceStore,
+                defaultPageFactory.FilterProvider,
+                defaultPageFactory.PageContentParser,
+                defaultPageFactory.ParsingOptions
+            });
+
+            if (instance is not IPageFactory<TPage> pageFactory)
+            {
+                throw new InvalidOperationException(
+                    $"Something wrong happened while creating page factory of type '{typeof(TPageFactory)}' for page type '{typeof(TPage)}'.");
+            }
+
+            AddPageFactory(pageFactory);
+        }
+
         internal PageTreeNode GetPageNode(int pageNumber)
         {
             if (!pagesByNumber.TryGetValue(pageNumber, out var node))
@@ -102,5 +175,19 @@
 
             return null;
         }
+
+        public void Dispose()
+        {
+            foreach (var key in pageFactoryCache.Keys)
+            {
+                var factory = pageFactoryCache[key];
+                pageFactoryCache.Remove(key);
+
+                if (factory is IDisposable disposable)
+                {
+                    disposable.Dispose();
+                }
+            }
+        }
     }
 }

src/UglyToad.PdfPig/PdfDocument.cs

@@ -112,7 +112,7 @@
         /// <param name="options">Optional parameters controlling parsing.</param>
         /// <returns>A <see cref="PdfDocument"/> providing access to the file contents.</returns>
         public static PdfDocument Open(byte[] fileBytes, ParsingOptions options = null) => PdfDocumentFactory.Open(fileBytes, options);
- 
+
         /// <summary>
         /// Opens a file and creates a <see cref="PdfDocument"/> for reading from the provided file path.
         /// </summary>
@@ -133,6 +133,26 @@
         /// <returns>A <see cref="PdfDocument"/> providing access to the file contents.</returns>
         public static PdfDocument Open(Stream stream, ParsingOptions options = null) => PdfDocumentFactory.Open(stream, options);
 
+        /// <summary>
+        /// TODO
+        /// </summary>
+        /// <typeparam name="TPage"></typeparam>
+        /// <param name="pageFactory"></param>
+        public void AddPageFactory<TPage>(IPageFactory<TPage> pageFactory)
+        {
+            pages.AddPageFactory(pageFactory);
+        }
+
+        /// <summary>
+        /// TODO
+        /// </summary>
+        /// <typeparam name="TPage"></typeparam>
+        /// <typeparam name="TPageFactory"></typeparam>
+        public void AddPageFactory<TPage, TPageFactory>() where TPageFactory : IPageFactory<TPage>
+        {
+            pages.AddPageFactory<TPage, TPageFactory>();
+        }
+
         /// <summary>
         /// Get the page with the specified page number (1 indexed).
         /// </summary>
@@ -162,6 +182,36 @@
             }
         }
 
+        /// <summary>
+        /// Get the page with the specified page number (1 indexed), using the specified page factory.
+        /// </summary>
+        /// <typeparam name="TPage"></typeparam>
+        /// <param name="pageNumber">The number of the page to return, this starts from 1.</param>
+        /// <returns>The page.</returns>
+        public TPage GetPage<TPage>(int pageNumber)
+        {
+            if (isDisposed)
+            {
+                throw new ObjectDisposedException("Cannot access page after the document is disposed.");
+            }
+
+            parsingOptions.Logger.Debug($"Accessing page {pageNumber}.");
+
+            try
+            {
+                return pages.GetPage<TPage>(pageNumber, namedDestinations, parsingOptions);
+            }
+            catch (Exception ex)
+            {
+                if (IsEncrypted)
+                {
+                    throw new PdfDocumentEncryptedException("Document was encrypted which may have caused error when retrieving page.", encryptionDictionary, ex);
+                }
+
+                throw;
+            }
+        }
+
         /// <summary>
         /// Gets all pages in this document in order.
         /// </summary>
@@ -173,6 +223,17 @@
             }
         }
 
+        /// <summary>
+        /// Gets all pages in this document in order, using the specified page factory.
+        /// </summary>
+        public IEnumerable<TPage> GetPages<TPage>()
+        {
+            for (var i = 0; i < NumberOfPages; i++)
+            {
+                yield return GetPage<TPage>(i + 1);
+            }
+        }
+
         /// <summary>
         /// Get the document level metadata if present.
         /// The metadata is XML in the (Extensible Metadata Platform) XMP format.
@@ -247,6 +308,7 @@
                 Advanced.Dispose();
                 pdfScanner.Dispose();
                 inputBytes.Dispose();
+                pages.Dispose();
             }
             catch (Exception ex)
             {