/// <summary>
/// Sanity checks the filter
/// </summary>
/// <returns>Error message, or blank if ok</returns>
public string Check()
{
if (!string.IsNullOrWhiteSpace(Category) &&
Category.ToUpper() != "MUN" && Category.ToUpper() != "TOP")
{
return("Category can be either MUN, TOP or left blank for both");
}
if (!string.IsNullOrWhiteSpace(SortBy) &&
SortBy.ToUpper() != "NAME" && SortBy.ToUpper() != "HEIGHT")
{
return("Sort by can be either NAME or HEIGHT");
}
if (!string.IsNullOrWhiteSpace(SortDirection) &&
SortDirection.ToUpper() != "ASC" && SortDirection.ToUpper() != "DESC")
{
return("Sort direction can be either ASC or DESC. Defaults to ASC if left blank.");
}
if (MaxHeight > 0 &&
MinHeight > 0 &&
MaxHeight < MinHeight)
{
return("Max height must be greater than min height");
}
return("");
}