public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
var strValue = value as string;
if (strValue == null)
{
throw new InvalidOperationException();
}
return(SnapPointRuleCollection.Parse(strValue));
}
public static SnapPointRuleCollection Parse(string strValue)
{
var snapPointRuleCollection = new SnapPointRuleCollection();
var delimitedValues = strValue.Split(Separators, StringSplitOptions.RemoveEmptyEntries);
foreach (var snapPointRuleStr in delimitedValues)
{
var hyphenIndex = snapPointRuleStr.IndexOf("-", StringComparison.OrdinalIgnoreCase);
if (hyphenIndex == -1)
{
throw new InvalidOperationException($"Can not convert string value '{snapPointRuleStr}' to value of type SnapPointRule");
}
var targetStr = snapPointRuleStr.Substring(0, hyphenIndex);
var sourceStr = snapPointRuleStr.Substring(hyphenIndex + 1, snapPointRuleStr.Length - hyphenIndex - 1);
SnapPoint target;
SnapPoint source;
if (ConvertDictionary.TryGetValue(targetStr, out target) == false)
{
throw new InvalidOperationException($"Can not convert string value '{targetStr}' to value of type SnapPoint");
}
if (ConvertDictionary.TryGetValue(sourceStr, out source) == false)
{
throw new InvalidOperationException($"Can not convert string value '{sourceStr}' to value of type SnapPoint");
}
snapPointRuleCollection.Add(new SnapPointRule
{
Target = target,
Source = source
});
}
return(snapPointRuleCollection);
}
