Parse data from PDF documents Leave feedback

// Create an instance of Parser class
using (Parser parser = new Parser(Constants.SampleCarWashPdf))
{
    // Extract data from PDF document
    DocumentData data = parser.ParseForm();
    // Check if form extraction is supported
    if (data == null)
    {
        Console.WriteLine("Form extraction isn't supported.");
        return;
    }

    // Create the preliminary record object
    PreliminaryRecord rec = new PreliminaryRecord();
    rec.Name = GetFieldText(data, "Name");
    rec.Model = GetFieldText(data, "Model");
    rec.Time = GetFieldText(data, "Time");
    rec.Description = GetFieldText(data, "Description");

    // We can save the preliminary record object to the database, 
    // send it as the web response or just print it to the console
    Console.WriteLine("Preliminary record");
    Console.WriteLine("Name: {0}", rec.Name);
    Console.WriteLine("Model: {0}", rec.Model);
    Console.WriteLine("Time: {0}", rec.Time);
    Console.WriteLine("Description: {0}", rec.Description);
}

private static string GetFieldText(DocumentData data, string fieldName)
{
    // Get the field from data collection
    FieldData fieldData = data.GetFieldsByName(fieldName).FirstOrDefault();
    // Check if the field data is not null (a field with the fieldName is contained in data collection)
    // and check if the field data contains the text
    return fieldData != null && fieldData.PageArea is PageTextArea
        ? (fieldData.PageArea as PageTextArea).Text
        : null;
}

/// <summary>
/// Simple POCO object to store the extracted data.
/// </summary>
public class PreliminaryRecord
{
    public string Name { get; set; }
    public string Model { get; set; }
    public string Time { get; set; }
    public string Description { get; set; }
}

// Create an instance of Parser class
using (Parser parser = new Parser(Constants.SampleInvoicePdf))
{
    // Parse the document by the template
    DocumentData data = parser.ParseByTemplate(GetTemplate());
    // Check if parsing document by template is supported
    if (data == null)
    {
        Console.WriteLine("Parsing Document by Template isn't supported.");
        return;
    }
    // Print extracted fields
    for (int i = 0; i < data.Count; i++)
    {
        Console.Write(data[i].Name + ": ");
        PageTextArea area = data[i].PageArea as PageTextArea;
        Console.WriteLine(area == null ? "Not a template field" : area.Text);
    }
}

private static Template GetTemplate()
{
    // Create detector parameters for "Details" table
    TemplateTableParameters detailsTableParameters = new TemplateTableParameters(new Rectangle(new Point(35, 320), new Size(530, 55)), null);
    // Create detector parameters for "Summary" table
    TemplateTableParameters summaryTableParameters = new TemplateTableParameters(new Rectangle(new Point(330, 385), new Size(220, 65)), null);
    // Create a collection of template items
    TemplateItem[] templateItems = new TemplateItem[]
    {
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 135), new Size(100, 10))), "FromCompany"),
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 150), new Size(100, 35))), "FromAddress"),
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 190), new Size(150, 2))), "FromEmail"),
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 250), new Size(100, 2))), "ToCompany"),
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 260), new Size(100, 15))), "ToAddress"),
        new TemplateField(new TemplateFixedPosition(new Rectangle(new Point(35, 290), new Size(150, 2))), "ToEmail"),
        new TemplateField(new TemplateRegexPosition("Invoice Number"), "InvoiceNumber"),
        new TemplateField(new TemplateLinkedPosition(
            "InvoiceNumber",
            new Size(200, 15),
            new TemplateLinkedPositionEdges(false, false, true, false)),
            "InvoiceNumberValue"),
        new TemplateField(new TemplateRegexPosition("Order Number"), "InvoiceOrder"),
        new TemplateField(new TemplateLinkedPosition(
            "InvoiceOrder",
            new Size(200, 15),
            new TemplateLinkedPositionEdges(false, false, true, false)),
            "InvoiceOrderValue"),
        new TemplateField(new TemplateRegexPosition("Invoice Date"), "InvoiceDate"),
        new TemplateField(new TemplateLinkedPosition(
            "InvoiceDate",
            new Size(200, 15),
            new TemplateLinkedPositionEdges(false, false, true, false)),
            "InvoiceDateValue"),
        new TemplateField(new TemplateRegexPosition("Due Date"), "DueDate"),
        new TemplateField(new TemplateLinkedPosition(
            "DueDate",
            new Size(200, 15),
            new TemplateLinkedPositionEdges(false, false, true, false)),
            "DueDateValue"),
        new TemplateField(new TemplateRegexPosition("Total Due"), "TotalDue"),
        new TemplateField(new TemplateLinkedPosition(
            "TotalDue",
            new Size(200, 15),
            new TemplateLinkedPositionEdges(false, false, true, false)),
            "TotalDueValue"),
        new TemplateTable(detailsTableParameters, "details", null),
        new TemplateTable(summaryTableParameters, "summary", null)
    };
    // Create a document template
    Template template = new Template(templateItems);
    return template;
}