Date calendar: Use the JQueryUI calendar.

Columns: I'm not sure what you're asking. Are the options in the second drop down filtered based on the selection of the first?

>Hi everybody,
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>What is the easiest way to always associate date type in the Model with ability to pick the date from the calendar in UI? I see that there is annotation
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>[DataType(DataType.Date)], but the EditorFor for it in the MVC3 doesn't seem smart enough (or may be it's not designed this way) to pick up a Calendar.
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>What is the solution you use in your projects for this problem?
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>Another question - I have an object that has references to two other objects (e.g. Engagements have references to Client object and Course object).
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>What is the best way to limit selection of columns for the drop downs? Say, I can define two new classes in the Model folder for ClientMin and CourseMin (so we would only have two columns), but what should I do next?
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>Can I, for example, use this syntax:
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>@Html.DropDownList("clientId", new SelectList((ClientMin)Model.Clients, "Id", "Name"))

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>E.g. can I box to the new type and will LINQ be smart enough to figure out I only need two columns?
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>Thanks in advance.