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LoadOptions(String) Method

Summary

Loads the default write options used of this BarcodeWriter from the specified XML file.

Syntax

C++

public void LoadOptions(  
   string fileName 
)

Public Overloads Sub LoadOptions( _ 
   ByVal fileName As String _ 
)

public: 
void LoadOptions(  
   String^ fileName 
)

Parameters

fileName
The XML file containing the data.

Remarks

The load/save methods are provided as helper methods for the user. The BarcodeEngine, BarcodeWriter and BarcodeWriter do not use these methods internally.

The default write options can be retrieved using the GetDefaultOptions or GetAllDefaultOptions methods. You can then change the values of the BarcodeWriteOptions object returned (or cast it back to the appropriate derived class). These options are used by the WriteBarcode method when no explicit options are passed by the user.

To save the default options to an XML file, use BarcodeWriter.SaveOptions(string fileName).

To save and load data to an XML stream, use BarcodeWriter.SaveOptions(Stream stream) and BarcodeWriter.LoadOptions(Stream stream).

Example

This example will show how to change, save and then load the options of a BarcodeWriter object.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Forms; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
public void BarcodeWriter_LoadSaveOptionsExample() 
{ 
   string xmlFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyWriteOptions.xml"); 
 
   BarcodeEngine engine1 = new BarcodeEngine(); 
   BarcodeWriter writer1 = engine1.Writer; 
 
   // Show a few of the default options 
   ShowWriterOptions("Default options 1:", writer1); 
 
   // Change some options 
   OneDBarcodeWriteOptions oneDWriteOptions = writer1.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeWriteOptions; 
   oneDWriteOptions.UseXModule = true; 
   QRBarcodeWriteOptions qrWriteOptions = writer1.GetDefaultOptions(BarcodeSymbology.QR) as QRBarcodeWriteOptions; 
   qrWriteOptions.HorizontalAlignment = BarcodeAlignment.Far; 
 
   // Show them 
   ShowWriterOptions("New options 1:", writer1); 
 
   // Save the options to an XML file 
   writer1.SaveOptions(xmlFileName); 
 
   // Now create another BarcodeWriter 
   // We could use the same one, but this example will show that changing the options 
   // for one BarcodeWriter will not change it in any other in the application 
 
   BarcodeEngine engine2 = new BarcodeEngine(); 
   BarcodeWriter writer2 = engine2.Writer; 
 
   // Show a few of the default options, should be the same as the first default options 
   ShowWriterOptions("Default options 2:", writer2); 
 
   // Load the options we just saved 
   writer2.LoadOptions(xmlFileName); 
 
   // Show them, should be the same as the new options in wirter1 
   ShowWriterOptions("Loaded options 2:", writer2); 
} 
 
private void ShowWriterOptions(string message, BarcodeWriter writer) 
{ 
   Console.WriteLine(message); 
 
   OneDBarcodeWriteOptions oneDWriteOptions = writer.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeWriteOptions; 
   Console.WriteLine("OneDBarcodeWriteOptions.UseXModule: {0}", oneDWriteOptions.UseXModule); 
   QRBarcodeWriteOptions qrWriteOptions = writer.GetDefaultOptions(BarcodeSymbology.QR) as QRBarcodeWriteOptions; 
   Console.WriteLine("QRBarcodeWriteOptions.HorizontalAlignment: {0}", qrWriteOptions.HorizontalAlignment); 
   Console.WriteLine("---------------"); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Forms 
Imports Leadtools.Barcode 
Imports Leadtools.ImageProcessing 
 
Public Sub BarcodeWriter_LoadSaveOptionsExample() 
   Dim xmlFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MyWriteOptions.xml") 
 
   Dim engine1 As New BarcodeEngine() 
   Dim writer1 As BarcodeWriter = engine1.Writer 
 
   ' Show a few of the default options 
   ShowWriterOptions("Default options 1:", writer1) 
 
   ' Change some options 
   Dim oneDWriteOptions As OneDBarcodeWriteOptions = DirectCast(writer1.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeWriteOptions) 
   oneDWriteOptions.UseXModule = True 
   Dim qrWriteOptions As QRBarcodeWriteOptions = DirectCast(writer1.GetDefaultOptions(BarcodeSymbology.QR), QRBarcodeWriteOptions) 
   qrWriteOptions.HorizontalAlignment = BarcodeAlignment.Far 
 
   ' Show them 
   ShowWriterOptions("New options 1:", writer1) 
 
   ' Save the options to an XML file 
   writer1.SaveOptions(xmlFileName) 
 
   ' Now create another BarcodeWriter 
   ' We could use the same one, but this example will show that changing the options 
   ' for one BarcodeWriter will not change it in any other in the application 
 
   Dim engine2 As New BarcodeEngine() 
   Dim writer2 As BarcodeWriter = engine2.Writer 
 
   ' Show a few of the default options, should be the same as the first default options 
   ShowWriterOptions("Default options 2:", writer2) 
 
   ' Load the options we just saved 
   writer2.LoadOptions(xmlFileName) 
 
   ' Show them, should be the same as the new options in wirter1 
   ShowWriterOptions("Loaded options 2:", writer2) 
End Sub 
 
Private Sub ShowWriterOptions(ByVal message As String, ByVal writer As BarcodeWriter) 
   Console.WriteLine(message) 
 
   Dim oneDWriteOptions As OneDBarcodeWriteOptions = DirectCast(writer.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeWriteOptions) 
   Console.WriteLine("OneDBarcodeWriteOptions.UseXModule: {0}", oneDWriteOptions.UseXModule) 
   Dim qrWriteOptions As QRBarcodeWriteOptions = DirectCast(writer.GetDefaultOptions(BarcodeSymbology.QR), QRBarcodeWriteOptions) 
   Console.WriteLine("QRBarcodeWriteOptions.HorizontalAlignment: {0}", qrWriteOptions.HorizontalAlignment) 
   Console.WriteLine("---------------") 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class