public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
Visibility rv = Visibility.Visible;
if (value != null)
{
TriStateBoolean theValue = (TriStateBoolean)value;
if (theValue.HasValue)
{
if (theValue.IsFalse)
{
rv = Visibility.Hidden;
}
}
}
return(rv);
}
/// <summary>
/// Retrieve the indicated integer value from the Windows Registry, from under subkeyPath (which is under BaseKeyPath).
/// If the retrieval fails then the provided default value is returned.
/// </summary>
/// <param name="valueName">the name of the Registry value to retrieve it from</param>
/// <param name="defaultValue">the default value to return if the retrieval fails</param>
/// <param name="subkeyPath">the Registry subkey (under BaseKeyPath) under which to retrieve it from</param>
/// <returns>The value from the Registry, or the default value if there's a failure</returns>
protected TriStateBoolean GetTriStateBoolean(string valueName, bool?defaultValue, string subkeyPath = null)
{
TriStateBoolean result = TriStateBoolean.From(defaultValue);
int integerDefaultValue = result.NumericValue;
using (var registryKey = this.OpenSubkeyUnderBasekey(false, subkeyPath))
{
if (registryKey != null)
{
int integerValue = (int)registryKey.GetValue(valueName, integerDefaultValue);
result = TriStateBoolean.From(integerValue);
}
else
{
Console.WriteLine("in RegistryBase.GetTriStateBoolean(" + valueName + ",), access failed so returning the default value.");
}
}
return(result);
}