/// <summary>
/// Get a Dictionary of attributes from the scanner given a List of attribute IDs.
/// </summary>
/// <param name="ids">Attribute ID list</param>
/// <returns>
/// Dictionary of ScannerAttribute objects holding identification info and the value of their corrisponding
/// attribute. Keyed by id.
/// </returns>
protected IDictionary <ushort, ScannerAttribute> GetAttributes(IEnumerable <ushort> ids)
{
var xml = string.Format(_getAttributesXml, string.Join(",", ids.Select(n => n.ToString()).ToArray()));
string outXml = null;
int status;
_scannerDriver.ExecCommand((int)ScannerCommand.AttrGet, ref xml, out outXml, out status);
var s = (StatusCode)status;
if (s != StatusCode.Success)
{
throw new ScannerException(s);
}
var retval = new Dictionary <ushort, ScannerAttribute>();
var doc = XDocument.Parse(outXml);
var attributes = doc.Descendants("attribute");
foreach (var xmlAttribute in attributes)
{
var id = ushort.Parse(xmlAttribute.Descendants("id").Single().Value);
var name = xmlAttribute.Descendants("name").Single().Value;
var dataType = (DataType)xmlAttribute.Descendants("datatype").Single().Value[0];
var permission = xmlAttribute.Descendants("permission").Single().Value[0];
var stringValue = xmlAttribute.Descendants("value").Single().Value;
var value = ValueConverters.StringToActualType(dataType, stringValue);
retval.Add(id,
new ScannerAttribute
{
Id = id,
Name = name,
DataType = dataType,
Permission = permission,
Value = value
});
}
return(retval);
}
/// <summary>
/// Get an attribute from the scanner given it's ID.
/// </summary>
/// <param name="id">Attribute ID</param>
/// <returns>ScannerAttribute object holding identification info and the value of the attribute.</returns>
protected ScannerAttribute GetAttribute(ushort id)
{
var xml = string.Format(_getAttributesXml, id);
string outXml;
int status;
_scannerDriver.ExecCommand((int)ScannerCommand.AttrGet, ref xml, out outXml, out status);
var s = (StatusCode)status;
if (s != StatusCode.Success)
{
throw new ScannerException(s);
}
if (outXml == null)
{
return(null);
}
var doc = XDocument.Parse(outXml);
var xmlAttribute = doc.Descendants("attribute").Single();
var name = xmlAttribute.Descendants("name").Single().Value;
var dataType = (DataType)xmlAttribute.Descendants("datatype").Single().Value[0];
var permission = xmlAttribute.Descendants("permission").Single().Value[0];
var stringValue = xmlAttribute.Descendants("value").Single().Value;
var value = ValueConverters.StringToActualType(dataType, stringValue);
var retval = new ScannerAttribute
{
Id = id,
Name = name,
DataType = dataType,
Permission = permission,
Value = value
};
return(retval);
}