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DateDiff function in C# to simulate VBScripts by Robert Chartier
By: aspfree
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    2002-01-31

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    This method is used to simulate the VBScript DateDiff Function. It is in Beta right now.

    I have not yet implemented all of the parameters to the method, just the more commone ones

    If you find any problems please email me with a description of the issue.


    0.
    1. /// <summary>
    2. /// same common params as the VBScript DateDiff: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/vsfctdatediff.asp
    3. /// /*Sample Code:
    4. /// * System.DateTime dt1 = new System.DateTime(1974,12,16);
    5. /// * System.DateTime dt2 = new System.DateTime(1973,12,16);
    6. /// * Page.Response.Write(Convert.ToString(DateDiff("t", dt1, dt2)));
    7. /// * */
    8. /// </summary>
    9. /// <param name="howtocompare"></param>
    10. /// <param name="startDate"></param>
    11. /// <param name="endDate"></param>
    12. /// <returns></returns>
    13. private double DateDiff(string howtocompare, System.DateTime startDate, System.DateTime endDate) {
    14. double diff=0;
    15. try {
    16. System.TimeSpan TS = new System.TimeSpan(startDate.Ticks-endDate.Ticks);
    17. #region converstion options
    18. switch (howtocompare.ToLower()) {
    19. case "m":
    20. diff = Convert.ToDouble(TS.TotalMinutes);
    21. break;
    22. case "s":
    23. diff = Convert.ToDouble(TS.TotalSeconds);
    24. break;
    25. case "t":
    26. diff = Convert.ToDouble(TS.Ticks);
    27. break;
    28. case "mm":
    29. diff = Convert.ToDouble(TS.TotalMilliseconds);
    30. break;
    31. case "yyyy":
    32. diff = Convert.ToDouble(TS.TotalDays/365);
    33. break;
    34. case "q":
    35. diff = Convert.ToDouble((TS.TotalDays/365)/4);
    36. break;
    37. default:
    38. //d
    39. diff = Convert.ToDouble(TS.TotalDays);
    40. break;
    41. }
    42. #endregion
    43. } catch(Exception e) {
    44. diff = -1;
    45. }
    46. return diff;
    47. }
    48.



    References:
    VBScript DateDiff Function


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    DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

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