public static bool GetYesOrNoAsBool(this ObjVerEx targetEx, MFIdentifier prop, out bool value)
{
value = false;
// if the object doesn't have the property, return null
if (!targetEx.HasProperty(prop))
{
return(false);
}
// get the text version of the property
var propText = targetEx.GetPropertyText(prop);
// if the text version of the property is "Yes", return true
if (propText.Equals("Yes"))
{
value = true;
return(true);
}
// if the text version of the property is "No", return false
if (propText.Equals("No"))
{
value = false;
return(true);
}
// couldn't parse the text value, return null
return(false);
}
public static bool GetDouble(this ObjVerEx targetEx, MFIdentifier prop, out double value)
{
// set default value
value = 0.0;
// check if the property exists on the target
if (!targetEx.HasProperty(prop))
{
return(false);
}
// attempt to get the text value of the property
var text = targetEx.GetPropertyText(prop);
// attempt to parse it
return(double.TryParse(text, out value));
}
/// <summary>
/// Enhanced method for <see cref="ObjVerEx.GetPropertyText(MFIdentifier)"/>
/// to return a <see langword="null"/> value even if the property was not set or could not be resolved,
/// otherwise the value which was set or <see cref="string.Empty"/>.
/// </summary>
///
/// <param name="objVerEx">
/// The <see cref="ObjVerEx"/> object to be used as base for calling <see cref="ObjVerEx.GetPropertyText(MFIdentifier)"/>.
/// </param>
/// <param name="prop">
/// The <see cref="MFIdentifier"/> object for the property which can be <see langword="null"/> or not resolved.
/// </param>
/// <param name="result">
/// The <see cref="string"/> value to be returned as output parameter.
/// </param>
///
/// <returns>
/// <list type="table">
/// <item>
/// <term><see cref="true"/></term>
/// <description>if <paramref name="prop"/> is not <see langword="null"/> and can be resolved</description>
/// </item>
/// <item>
/// <term><see cref="false"/></term>
/// <description>if <paramref name="prop"/> is <see langword="null"/> or cannot be resolved</description>
/// </item>
/// </list>
/// </returns>
public static bool TryGetPropertyText(
this ObjVerEx objVerEx,
MFIdentifier prop,
out string result)
{
// Sanity
if (null == objVerEx)
{
throw new ArgumentNullException(nameof(objVerEx));
}
// return the nullValue specified if not set or not resolved as result and false as return value
if (null == prop || !prop.IsResolved)
{
result = null;
return(false);
}
// return value and return that all is ok
result = objVerEx.GetPropertyText(prop);
return(true);
}