/// <summary>
/// Converts the property value (in respect to multiple source elements) and returns the converted value.
/// </summary>
/// <returns>Converted property value.</returns>
/// <remarks>
/// Converter: All equal --> use value. One differs --> empty value.
/// </remarks>
public override object GetPropertyValue()
{
Html value = PropertyGridEditorViewModel.GetPropertyValue(this.Elements[0], this.PropertyName) as Html;
if (value == null && this.ViewModelStore != null)
{
IParentModelElement parent = this.ViewModelStore.GetDomainModelServices(this.Elements[0] as ModelElement).ElementParentProvider.GetParentModelElement(this.Elements[0] as ModelElement);
if (parent == null)
{
throw new ArgumentNullException("Parent of element " + this.Elements[0].ToString() + " can not be null");
}
string path = parent.DomainFilePath;
string dirName = new System.IO.FileInfo(path).DirectoryName;
value = new Html("", dirName);
//value = new Html("", this.ViewModelStore.GetDomainModelServices(this.Elements[0] as ModelElement).ElementParentProvider.GetDomainModelDirectory(this.Elements[0] as ModelElement));
}
return(value);
}
