Gets all the supported values of the requested capability.
Syntax
Parameters
- type
- Indicates the capability to get.
Return Value
A TwainCapability object represents all the supported values of the requested capability.
Example
Visual Basic | Copy Code |
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Public Sub QueryCapabilityExample(ByVal parent As IWin32Window)
Try
Dim twnSession As TwainSession = New TwainSession()
twnSession.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)
Dim twCap As TwainCapability = twnSession.QueryCapability(TwainCapabilityType.ImageUnits)
If twCap.Information.ContainerType = TwainContainerType.OneValue Then
If CType(twCap.OneValueCapability.Value, TwainCapabilityValue) <> TwainCapabilityValue.UnitInches Then
twCap.OneValueCapability.Value = TwainCapabilityValue.UnitInches
twnSession.SetCapability(twCap, TwainSetCapabilityMode.Set)
End If
End If
twnSession.Shutdown()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub |
C# | Copy Code |
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public void QueryCapabilityExample(IWin32Window parent)
{
try
{
TwainSession twnSession = new TwainSession();
twnSession.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);
TwainCapability twCap = twnSession.QueryCapability(TwainCapabilityType.ImageUnits);
if (twCap.Information.ContainerType == TwainContainerType.OneValue)
{
if (twCap.OneValueCapability.Value != (object)TwainCapabilityValue.UnitInches)
{
twCap.OneValueCapability.Value = TwainCapabilityValue.UnitInches;
twnSession.SetCapability(twCap, TwainSetCapabilityMode.Set);
}
}
twnSession.Shutdown();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
} |
Remarks
Requirements
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7
See Also