Question

I want know is there good way to detect Column DataType for Date field (NOT DateTime)?

This what currently I do:

switch (dt.Columns[col].DataType.FullName)
{  
    case "System.DateTime":  
        formatedVal = Formatter.GetDateTime(val);  
        break;

    // which is NOT possible, but something equivalent am looking for
    case "System.Date":  
        formatedVal = Formatter.GetDate(val);  
        break;

    default:
        formatedVal = val.ToString();
        break;
}

Answer 1

Nope. There is no Date type, there is only DateTime. If this is coming from a SQL Server 2008 table that uses a date column, it will be mapped to DateTime in .NET.

If you need to get at this information then you’ll have to do it at the SQL level; by the time it’s loaded into a DataTable, it’s too late.

I’m not positive about your requirements, but it looks like you might be able to get away with just checking for midnight and using a different format for that:

DateTime dt = (DateTime)val;
return (dt == dt.Date) ? Formatter.GetDate(dt) : Formatter.GetDateTime(dt);