/// <summary>
/// Returns a collection of standard values for the data type this type converter is designed for when provided
/// with a format context.
/// </summary>
/// <param name="context">
/// An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context
/// that can be used to extract additional information about the environment from which this converter is invoked. This
/// parameter or properties of this parameter can be null.
/// </param>
/// <returns>
/// A <see cref="T:System.ComponentModel.TypeConverter.StandardValuesCollection" /> that holds a standard set of
/// valid values, or null if the data type does not support a standard set of values.
/// </returns>
public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
{
base.GetStandardValues(context);
List <string> values = new List <string>();
Store store = GetStore(context.Instance);
if (store != null)
{
ModelRoot modelRoot = store.ModelRoot();
// Value set changes at EFCore3
if (modelRoot.EntityFrameworkVersion == EFVersion.EF6)
{
return(new StandardValuesCollection(values));
}
if (modelRoot.GetEntityFrameworkPackageVersionNum() < 3)
{
values.AddRange(new[]
{
"Field"
, "FieldDuringConstruction"
, "Property"
});
}
else
{
values.AddRange(new[]
{
"Field"
, "FieldDuringConstruction"
, "PreferField"
, "PreferFieldDuringConstruction"
, "PreferProperty"
, "Property"
});
}
}
return(new StandardValuesCollection(values));
}
/// <summary>
/// Called by TypeDescriptors to determine what should be shown in a property editor. Removing a property hides
/// it from the property editor in Visual Studio, nothing more.
/// </summary>
/// <param name="propertyDescriptors"></param>
/// <param name="element"></param>
public static void RemoveHiddenProperties(PropertyDescriptorCollection propertyDescriptors, ModelRoot element)
{
ModelRoot modelRoot = element;
for (int index = 0; index < propertyDescriptors.Count; index++)
{
bool shouldRemove = false;
switch (propertyDescriptors[index].Name)
{
case "InstallNugetPackages":
shouldRemove = !ModelRoot.CanLoadNugetPackages;
break;
case "DatabaseInitializerType":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore;
break;
case "AutomaticMigrationsEnabled":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore;
break;
case "ProxyGenerationEnabled":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore;
break;
case "DatabaseType":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore;
break;
case "InheritanceStrategy":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore;
break;
case "LazyLoadingEnabled":
shouldRemove = modelRoot.EntityFrameworkVersion == EFVersion.EFCore && modelRoot.GetEntityFrameworkPackageVersionNum() < 2.1;
break;
}
if (shouldRemove)
{
propertyDescriptors.Remove(propertyDescriptors[index--]);
}
}
}