Easy Date Validation in Visual Basic

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• JM

  James Mouchett17y agoeditedPosted Mar 12, 2009, 11:08 AMEdited Mar 12, 2009, 11:10 AM

  Try FormatDateTime(DateString, DateFormat.GeneralDate) MsgBox("Valid Date") Catch ex As Exception MsgBox("Invalid Date") End Try This seems much faster and is already a part of VB.Net.
  • JM

    James Mouchett17y agoPosted Mar 12, 2009, 5:32 PM

    While I agree that you would have to use the VisualBasic (VB) namespace, I figure if you are in VB.NET you do not mind using some of the (VB) functions. Sometimes re-inventing the wheel is just not necessary. If you are not going to need any other (VB) derived functions then of course, using your snippet of code above is a great way to do what you want. However, if you are using other (VB) derived function then you might want to just let the FormatDateTime function be the primary without adding more code to the final compilation.
  • JM

    James Mouchett17y agoPosted Mar 12, 2009, 5:44 PM

    Or not using the VisualBasic namespace you could do the following: Try Date.ParseExact(DateString, "d/m/yyyy", New Globalization.CultureInfo("en-US")) MsgBox("Valid Date") Catch ex As Exception MsgBox("Invalid Date") End Try There are other methods too: Try Dim ADate As DateTime = Now ADate.ToString("d/m/yyyy") MsgBox("Valid Date") Catch ex as Exception MsgBox("Invalid Date") End Try Again, not trying to recreate the wheel.
  • JM

    James Mouchett17y agoPosted Mar 13, 2009, 5:41 PM

    Scott, After reading through the information that you provided and the information that I provided I have to tip my hat to you. You are in fact correct on the benchmarks and your code is highly efficient. I apologize for earlier as it may have come across the wrong way. I have provided my own benchmarks for reference as well. The test #'s will correlate with the order in which the examples were provided. Test # 1 at 10,000,000 runs: 8 Seconds Test # 2 at 10,000,000 runs: 24 Seconds Test # 3 at 10,000,000 runs: 4 Minutes 44 Seconds Test # 4 at 10,000,000 runs: 14 Seconds Great coding example!

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