Allow child classes of AbpCrudPageBase to control New Entity creation

[jzumwalt]

Classes that inherit from AbpCrudPage base should be allowed to control instantiation of TCreateViewModel. This can allow for more control over initial state of new Entities, as well as enabling Copy EntityActions.

Basic implementation provided for explanation:

add a new method: protected virtual async Task<TCreateViewModel> NewCreateViewModelAsync() { return new TCreateViewModel(); }

Change all instances of new TCreateViewModel() to call NewCreateViewModel() instead: https://github.com/abpframework/abp/blob/c945df6d0dcc5a2191cca935ede8c979a983151e/framework/src/Volo.Abp.BlazoriseUI/AbpCrudPageBase.cs#L331

[maliming]

hi

You can contribute the code. : )

[stale[bot]]

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