Tns.DeepComparison 1.0.0

Deep Comparison of Objects

This is C# method which compares two objects - property by property; checks the values; It will inform any difference is found or not. It will traverse the object deeply up to n-th level and comprares primitive types, collections/enumrables, associated complex objects using recursion.

Accuracy

This comparer had been used regularly by a team of software engineers for more than a year. So many bugs are fixed in that time. After a period of time like 7/8 months, this method became stable (I hope!).

Use case

This method is written to prompt the user before closing a form without saving; when any change is found in the form.

Method definition

bool CompareObject(T obj1, T obj2, bool nullEqualsEmpty = true, int depth = -1, dynamic mismatchInfo = null)

Parameter description

• obj1 & obj2 (complex type): the objects that will be compared.
• nullEqualsEmpty (boolean): Whether null and empty values will be treated as equal or not. If true then those states will be treated as equal: null | empty | default | count 0 list.
• depth (int): How deep the compare method will go. -1 (or any negative): infinite level; 0 (zer0): only immediate, non-complex properties, >0 (any positive number): comparison will continue till the mentioned level.
• mismatchInfo (ExpandoObject): [For debugging purpose] Pass an empty ExpandoObject; information about mismatch will be included.

Returns (boolean): Whether the values of obj1 and obj2 are same or not.

Sample call

System.Dynamic.ExpandoObject mismatchInfo;
bool isIdentical = DeepComparison.CompareObject<Product>(currentProduct, oldProduct, nullEqualsEmpty: true, mismatchInfo: mismatchInfo);

if (!isIdentical)
{
  MessageBox.Show("You have unsaved changes. Do you want to save your changes?", "Confirmation", MessageBoxButton.YesNoCancel, MessageBoxImage.Warning);
}