public override int CompareTo(object obj)
{
if (obj is GradeWP)
{
GradeWP other = obj as GradeWP;
//oldest grades are shown first
int compare = Date.Date.CompareTo(other.Date.Date);
if (compare == 0)
{
//dropped items go after
if (IsDropped && !other.IsDropped)
{
return(1);
}
//undropped items go before anything dropped
if (!IsDropped && other.IsDropped)
{
return(-1);
}
//more recently created items appear first if on same day
return(DateCreated.CompareTo((obj as GradeWP).DateCreated));
}
return(compare);
}
return(0);
}
public int CompareTo(ClassWin other)
{
int comp = Name.CompareTo(other.Name);
if (comp == 0)
{
return(DateCreated.CompareTo(other.DateCreated));
}
return(comp);
}
/// <summary>
/// This is the object's validate method, returns all validation errors in a list that the end user can go through
/// </summary>
/// <param name="validationContext"></param>
/// <returns></returns>
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
IEnumerable <ValidationResult> validationResults = new List <ValidationResult>();
Validation validator = new Validation();
var isCommentValid = validator.ValidateString(Comment);
if (DateCreated.CompareTo(DateTime.Now) > 0)
{
validationResults = validationResults.Append(new ValidationResult("Invalid Date. Cannot have a comment created in the future"));
}
if (isCommentValid != null)
{
validationResults = validationResults.Append(new ValidationResult(isCommentValid));
}
if (Rating < 0)
{
validationResults = validationResults.Append(new ValidationResult("Rating should be nonnegative"));
}
return(validationResults);
}
/// <summary>
/// Compares the current object with another object of the same type.
/// </summary>
/// <param name="other">
/// An object to compare with this object.
/// </param>
/// <returns>
/// A 32-bit signed integer that indicates the relative order of the
/// objects being compared. The return value has the following meanings:
/// Value Meaning Less than zero This object is less than the other parameter.
/// Zero This object is equal to other. Greater than zero This object is greater than other.
/// </returns>
public int CompareTo(Comment other)
{
return(DateCreated.CompareTo(other.DateCreated));
}
/// <summary>
/// Things with earlier creation dates go first
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public virtual int CompareTo(BaseDataItem other)
{
return(DateCreated.CompareTo(other.DateCreated));
}
