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Added workaround for sources that don't support querysupport call.

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soukoku
2015-02-13 21:34:12 -05:00
parent 0f4e258970
commit bace6e6323
17 changed files with 418 additions and 144 deletions
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13
NTwain/DataSource.cs
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@@ -150,22 +150,31 @@ namespace NTwain
/// </value>
public Version ProtocolVersion { get; private set; }
/// <summary>
/// Gets a value indicating whether this data source has been opened.
/// </summary>
/// <value>
/// <c>true</c> if this data source is open; otherwise, <c>false</c>.
/// </value>
public bool IsOpen { get { return _session.IsSourceOpen; } }
static readonly CapabilityId[] _emptyCapList = new CapabilityId[0];
private IList<CapabilityId> _supportedCapsList;
/// <summary>
/// Gets the list of supported caps for this source.
/// Gets the list of supported caps for this source.
/// </summary>
/// <value>
/// The supported caps.
/// </value>
[Obsolete("Use CapSupportedCaps.Get() instead.")]
public IList<CapabilityId> SupportedCaps
{
get
{
if (_supportedCapsList == null && _session.State > 3)
{
_supportedCapsList = CapSupportedCaps.Get();// CapGet(CapabilityId.CapSupportedCaps).CastToEnum<CapabilityId>(false);
_supportedCapsList = CapSupportedCaps.Get();
}
return _supportedCapsList ?? _emptyCapList;
}