// // This code is part of Document Solutions for Word demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using System.Collections.Generic; using System.Linq; using System.Globalization; using GrapeCity.Documents.Word; namespace DsWordWeb.Demos { // This example shows how to deal with the 'data source not found' error. public class DataTplFixDataSourceNotFound { // Code demonstrating the problem: GcWordDocument Problem() { using var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json")); var doc = new GcWordDocument(); doc.DataTemplate.DataSources.Add("ds", oceans); // Incorrect: 'ds1' is used as data source name, but there is no data source with that name: doc.Body.Paragraphs.Add("{{ds1.name}}"); doc.DataTemplate.Process(CultureInfo.GetCultureInfo("en-US")); return doc; } // Code demonstrating the fix: GcWordDocument Fix() { using var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json")); var doc = new GcWordDocument(); doc.DataTemplate.DataSources.Add("ds", oceans); // Correct: use the correct data source name 'ds': doc.Body.Paragraphs.Add("{{ds.name}}"); doc.DataTemplate.Process(CultureInfo.GetCultureInfo("en-US")); return doc; } public GcWordDocument CreateDocx() { GcWordDocument doc; try { // This fails: doc = Problem(); } catch (Exception ex) { // This works: doc = Fix(); // Insert a brief explanation of the problem and the fix into the generated document: doc.Body.Paragraphs.Insert( $"The error \"{ex.Message}\" occurred because in the template a non-existing data source name was used. " + $"The fix is to ensure that data source names used in the template match names of data sources added to the DataSources collection.", doc.Styles[BuiltInStyleId.BlockText], InsertLocation.Start); } return doc; } } }