/// <summary>
/// Get cref="ScannerAttribute" object list from CoreScanner output XML
/// </summary>
/// <param name="outXml">Output XML received from CoreScanner</param>
/// <returns>List of cref="ScannerAttribute" objects</returns>
private List <ScannerAttribute> GetAttributesFromOutXml(string outXml)
{
if (String.IsNullOrEmpty(outXml))
{
throw new ArgumentException(INCORRECT_ARGUMENT);
}
List <ScannerAttribute> scannerAttributes = new List <ScannerAttribute>();
try
{
XmlTextReader xmlRead = new XmlTextReader(new StringReader(outXml));
xmlRead.WhitespaceHandling = WhitespaceHandling.Significant;
ScannerAttribute scannerAttribute = null;
string elementName = String.Empty, elementValue = String.Empty;
while (xmlRead.Read())
{
switch (xmlRead.NodeType)
{
case XmlNodeType.Element:
elementName = xmlRead.Name;
break;
case XmlNodeType.Text:
elementValue = xmlRead.Value;
switch (elementName)
{
case Scanner.TAG_ATTR_ID:
scannerAttribute = new ScannerAttribute();
scannerAttribute.Id = Convert.ToInt32(elementValue);
break;
case Scanner.TAG_ATTR_TYPE:
scannerAttribute.Type = elementValue;
break;
case Scanner.TAG_ATTR_PROPERTY:
scannerAttribute.Permission = elementValue;
break;
case Scanner.TAG_ATTR_VALUE:
scannerAttribute.Value = elementValue;
scannerAttributes.Add(scannerAttribute);
break;
}
break;
}
}
}
catch (Exception e)
{
throw e;
}
return(scannerAttributes);
}
/// <summary>
/// Get status last RFID operation
/// </summary>
/// <returns></returns>
private int GetRfidCommandStatus()
{
List <ScannerAttribute> attributes = GetAttributes(new List <int> {
ATTRIBUTE_RFID_CMD_STATUS
});
if (attributes != null)
{
ScannerAttribute commandStatusAttribute = attributes[0];
if (commandStatusAttribute.Id == ATTRIBUTE_RFID_CMD_STATUS)
{
return(Convert.ToInt32(commandStatusAttribute.Value));
}
}
return(-1);
}
/// <summary>
/// Get value of ATTRIBUTE_RFID_DATA attribute
/// </summary>
/// <returns>Value of ATTRIBUTE_RFID_DATA attribute. Empty string on failures. </returns>
private string GetRfidData()
{
List <ScannerAttribute> attributes = GetAttributes(new List <int> {
ATTRIBUTE_RFID_DATA
});
if (attributes != null)
{
ScannerAttribute commandStatusAttribute = attributes[0];
if (commandStatusAttribute.Id == ATTRIBUTE_RFID_DATA)
{
var data = (string)commandStatusAttribute.Value;
if (data.StartsWith(RFID_HEX_PREFIX))
{
data = data.Substring(10, (data.Length - 10));
}
return(data);
}
}
return(String.Empty);
}