Nullable GUID

Question

In my database, in one of the table I have a GUID column with allow nulls. I have a method with a Guid? parameter that inserts a new data row in the table. However when I s

Answer 1

If you are into extension methods...

/// 

/// Returns nullable Guid (Guid?) value if not null or Guid.Empty, otherwise returns DBNull.Value
/// 
public static object GetValueOrDBNull(this Guid? aGuid)
{
  return (!aGuid.IsNullOrEmpty()) ? (object)aGuid : DBNull.Value;
}

/// 

/// Determines if a nullable Guid (Guid?) is null or Guid.Empty
/// 
public static bool IsNullOrEmpty(this Guid? aGuid)
{
  return (!aGuid.HasValue || aGuid.Value == Guid.Empty);
}

Then you could say: myNewRow.myGuidColumn = myGuid.GetValueOrDBNull();

NOTE: This will insert null when myGuid == Guid.Empty, you could easily tweak the method if you want to allow empty Guids in your column.