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| 1 | +using Syncfusion.DocIO; |
| 2 | +using Syncfusion.DocIO.DLS; |
| 3 | +using System.Collections.Generic; |
| 4 | +using System.Data; |
| 5 | +using System.IO; |
| 6 | +using System.Text; |
| 7 | + |
| 8 | +namespace Merge_markdown_during_mail_merge |
| 9 | +{ |
| 10 | + class Program |
| 11 | + { |
| 12 | + static Dictionary<WParagraph, Dictionary<int, string>> paraToInsertMarkdown = new Dictionary<WParagraph, Dictionary<int, string>>(); |
| 13 | + static void Main(string[] args) |
| 14 | + { |
| 15 | + using (FileStream inputFileStream = new FileStream(Path.GetFullPath(@"Data/Template.docx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) |
| 16 | + { |
| 17 | + //Opens an existing document from stream through constructor of `WordDocument` class. |
| 18 | + using (WordDocument document = new WordDocument(inputFileStream, FormatType.Automatic)) |
| 19 | + { |
| 20 | + //Creates mail merge events handler to replace merge field with HTML. |
| 21 | + document.MailMerge.MergeField += new MergeFieldEventHandler(MergeFieldEvent); |
| 22 | + //Gets data to perform mail merge. |
| 23 | + DataTable table = GetDataTable(); |
| 24 | + //Performs the mail merge. |
| 25 | + document.MailMerge.Execute(table); |
| 26 | + //Append Markdown to paragraph. |
| 27 | + InsertMarkdown(); |
| 28 | + //Removes mail merge events handler. |
| 29 | + document.MailMerge.MergeField -= new MergeFieldEventHandler(MergeFieldEvent); |
| 30 | + //Creates file stream. |
| 31 | + using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Result.docx"), FileMode.Create, FileAccess.ReadWrite)) |
| 32 | + { |
| 33 | + //Saves the Word document to file stream. |
| 34 | + document.Save(outputFileStream, FormatType.Docx); |
| 35 | + } |
| 36 | + //Closes the document. |
| 37 | + document.Close(); |
| 38 | + } |
| 39 | + } |
| 40 | + } |
| 41 | + |
| 42 | + #region Helper methods |
| 43 | + /// <summary> |
| 44 | + /// Replaces merge field with Markdown string by using MergeFieldEventHandler. |
| 45 | + /// </summary> |
| 46 | + /// <param name="sender"></param> |
| 47 | + /// <param name="args"></param> |
| 48 | + public static void MergeFieldEvent(object sender, MergeFieldEventArgs args) |
| 49 | + { |
| 50 | + if (args.TableName.Equals("Markdown")) |
| 51 | + { |
| 52 | + if (args.FieldName.Equals("ProductList")) |
| 53 | + { |
| 54 | + //Gets the current merge field owner paragraph. |
| 55 | + WParagraph paragraph = args.CurrentMergeField.OwnerParagraph; |
| 56 | + //Gets the current merge field index in the current paragraph. |
| 57 | + int mergeFieldIndex = paragraph.ChildEntities.IndexOf(args.CurrentMergeField); |
| 58 | + //Maintain Markdown in collection. |
| 59 | + Dictionary<int, string> fieldValues = new Dictionary<int, string>(); |
| 60 | + fieldValues.Add(mergeFieldIndex, args.FieldValue.ToString()); |
| 61 | + //Maintain paragraph in collection. |
| 62 | + paraToInsertMarkdown.Add(paragraph, fieldValues); |
| 63 | + //Set field value as empty. |
| 64 | + args.Text = string.Empty; |
| 65 | + } |
| 66 | + } |
| 67 | + } |
| 68 | + /// <summary> |
| 69 | + /// Gets the data to perform mail merge |
| 70 | + /// </summary> |
| 71 | + /// <returns></returns> |
| 72 | + private static DataTable GetDataTable() |
| 73 | + { |
| 74 | + DataTable dataTable = new DataTable("Markdown"); |
| 75 | + dataTable.Columns.Add("CustomerName"); |
| 76 | + dataTable.Columns.Add("Address"); |
| 77 | + dataTable.Columns.Add("Phone"); |
| 78 | + dataTable.Columns.Add("ProductList"); |
| 79 | + DataRow datarow = dataTable.NewRow(); |
| 80 | + dataTable.Rows.Add(datarow); |
| 81 | + datarow["CustomerName"] = "Nancy Davolio"; |
| 82 | + datarow["Address"] = "59 rue de I'Abbaye, Reims 51100, France"; |
| 83 | + datarow["Phone"] = "1-888-936-8638"; |
| 84 | + //Markdown content. |
| 85 | + string markdown = "# Hello Markdown!\nThis is some **bold** text."; |
| 86 | + datarow["ProductList"] = markdown; |
| 87 | + return dataTable; |
| 88 | + } |
| 89 | + /// <summary> |
| 90 | + /// Append Markdown to paragraph. |
| 91 | + /// </summary> |
| 92 | + private static void InsertMarkdown() |
| 93 | + { |
| 94 | + //Iterates through each item in the dictionary. |
| 95 | + foreach (KeyValuePair<WParagraph, Dictionary<int, string>> dictionaryItems in paraToInsertMarkdown) |
| 96 | + { |
| 97 | + WParagraph paragraph = dictionaryItems.Key as WParagraph; |
| 98 | + Dictionary<int, string> values = dictionaryItems.Value as Dictionary<int, string>; |
| 99 | + //Iterates through each value in the dictionary. |
| 100 | + foreach (KeyValuePair<int, string> valuePair in values) |
| 101 | + { |
| 102 | + int index = valuePair.Key; |
| 103 | + string fieldValue = valuePair.Value; |
| 104 | + // Convert the markdown string to bytes using UTF-8 encoding |
| 105 | + byte[] contentBytes = Encoding.UTF8.GetBytes(fieldValue); |
| 106 | + |
| 107 | + // Create a MemoryStream from the content bytes |
| 108 | + using (MemoryStream memoryStream = new MemoryStream(contentBytes)) |
| 109 | + { |
| 110 | + //Open the markdown Word document |
| 111 | + using (WordDocument markdownDoc = new WordDocument(memoryStream, FormatType.Markdown)) |
| 112 | + { |
| 113 | + TextBodyPart bodyPart = new TextBodyPart(paragraph.OwnerTextBody.Document); |
| 114 | + BodyItemCollection m_bodyItems = bodyPart.BodyItems; |
| 115 | + //Copy and paste the markdown at the same position of mergefield in Word document. |
| 116 | + foreach (Entity entity in markdownDoc.LastSection.Body.ChildEntities) |
| 117 | + { |
| 118 | + m_bodyItems.Add(entity.Clone()); |
| 119 | + } |
| 120 | + bodyPart.PasteAt(paragraph.OwnerTextBody, paragraph.OwnerTextBody.ChildEntities.IndexOf(paragraph), index); |
| 121 | + } |
| 122 | + } |
| 123 | + } |
| 124 | + } |
| 125 | + paraToInsertMarkdown.Clear(); |
| 126 | + } |
| 127 | + #endregion |
| 128 | + } |
| 129 | +} |
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