public IDictionary <PropertyKey, object> SetProperties(DataFieldInfo[] data)
{
if (data == null || data.Length == 0)
{
throw new ArgumentNullException("data", "Data field array must not be null or empty.");
}
IPortableDeviceValues pdv = new PortableDeviceValues( );
for (int i = 0; i < data.Length; i++)
{
PropertyKey propKey = data[i].Key;
object value = data[i].Value;
if (value == null)
{
throw new ArgumentNullException("data", String.Format("Data contains a null value at index {0}", i));
}
PropVariant pv = new PropVariant();
try
{
// PropVariant.FromObject will throw an ArgumentException if the value can
// not be converted to an appropriate PropVariant.
pv = PropVariant.FromObject(value);
pdv.SetValue(ref propKey, ref pv);
}
catch (ArgumentException)
{
if (value is Guid)
{
Guid guid = (Guid)value;
pdv.SetGuidValue(ref propKey, ref guid);
}
else if (value is byte[])
{
byte[] buffer = (byte[])value;
pdv.SetBufferValue(ref propKey, buffer, (uint)buffer.Length);
}
else
{
pdv.SetIUnknownValue(ref propKey, value);
}
}
finally
{
pv.Clear();
}
}
Dictionary <PropertyKey, object> results = new Dictionary <PropertyKey, object>( );
IPortableDeviceValues pdv2 = null;
HRESULT hr = nativeISensor.SetProperties(pdv, out pdv2);
if (hr == HRESULT.S_OK)
{
try
{
uint count = 0;
pdv2.GetCount(ref count);
for (uint i = 0; i < count; i++)
{
PropertyKey propKey = new PropertyKey();
PropVariant propVal = new PropVariant();
try
{
pdv2.GetAt(i, ref propKey, ref propVal);
results.Add(propKey, propVal.Value);
}
finally
{
propVal.Clear( );
}
}
}
finally
{
Marshal.ReleaseComObject(pdv2);
pdv2 = null;
}
}
return(results);
}
/// <summary>
/// Sets the values of multiple properties.
/// </summary>
/// <param name="data">An array that contains the property keys and values.</param>
/// <returns>A dictionary of the new values for the properties. Actual values may not match the requested values.</returns>
public IDictionary <PropertyKey, object> SetProperties(DataFieldInfo[] data)
{
if (data == null || data.Length == 0)
{
throw new ArgumentException(LocalizedMessages.SensorEmptyData, "data");
}
IPortableDeviceValues pdv = new PortableDeviceValues();
for (int i = 0; i < data.Length; i++)
{
PropertyKey propKey = data[i].Key;
object value = data[i].Value;
if (value == null)
{
throw new ArgumentException(
string.Format(System.Globalization.CultureInfo.InvariantCulture,
LocalizedMessages.SensorNullValueAtIndex, i),
"data");
}
try
{
// new PropVariant will throw an ArgumentException if the value can
// not be converted to an appropriate PropVariant.
using (PropVariant pv = PropVariant.FromObject(value))
{
pdv.SetValue(ref propKey, pv);
}
}
catch (ArgumentException)
{
byte[] buffer;
if (value is Guid)
{
Guid guid = (Guid)value;
pdv.SetGuidValue(ref propKey, ref guid);
}
else if ((buffer = value as byte[]) != null)
{
pdv.SetBufferValue(ref propKey, buffer, (uint)buffer.Length);
}
else
{
pdv.SetIUnknownValue(ref propKey, value);
}
}
}
Dictionary <PropertyKey, object> results = new Dictionary <PropertyKey, object>();
IPortableDeviceValues pdv2 = null;
HResult hr = nativeISensor.SetProperties(pdv, out pdv2);
if (hr == HResult.Ok)
{
try
{
uint count = 0;
pdv2.GetCount(ref count);
for (uint i = 0; i < count; i++)
{
PropertyKey propKey = new PropertyKey();
using (PropVariant propVal = new PropVariant())
{
pdv2.GetAt(i, ref propKey, propVal);
results.Add(propKey, propVal.Value);
}
}
}
finally
{
Marshal.ReleaseComObject(pdv2);
pdv2 = null;
}
}
return(results);
}