//
// 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 with this name already exists' error.
public class DataTplFixNoDataSources
{
// Code demonstrating the problem:
GcWordDocument Problem()
{
using var oceans = File.OpenRead(Path.Combine("Resources", "data", "oceans.json"));
var doc = new GcWordDocument();
doc.Body.Paragraphs.Add("{{ds.name}}");
// Incorrect: no data sources have been added when the DataTemplate.Process() method is called:
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.Body.Paragraphs.Add("{{ds.name}}");
doc.DataTemplate.DataSources.Add("ds", oceans);
// Correct: the data source have been added prior to calling the DataTemplate.Process() method:
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 the DataTemplate.Process() method was called before adding the data source. " +
$"The fix is to add the data sources prior to calling the DataTemplate.Process() method.",
doc.Styles[BuiltInStyleId.BlockText],
InsertLocation.Start);
}
return doc;
}
}
}