public static bool TrySetMetadataByName(this IWICMetadataQueryWriter meta, string name, PropVariant value)
{
var pvMarshal = new PropVariant.Marshaler();
var pvNative = pvMarshal.MarshalManagedToNative(value);
int hr = ProxyFunctions.SetMetadataByName(meta, name, pvNative);
pvMarshal.CleanUpNativeData(pvNative);
return(hr >= 0);
}
public static bool TryGetMetadataByName(this IWICMetadataQueryReader meta, string name, out PropVariant value)
{
value = null;
int hr = ProxyFunctions.GetMetadataByName(meta, name, IntPtr.Zero);
if (hr >= 0)
{
value = new PropVariant();
var pvMarshal = new PropVariant.Marshaler();
var pvNative = pvMarshal.MarshalManagedToNative(value);
hr = ProxyFunctions.GetMetadataByName(meta, name, pvNative);
pvMarshal.MarshalNativeToManaged(pvNative);
pvMarshal.CleanUpNativeData(pvNative);
}
return(hr >= 0);
}