In this tutorial, i will teach you how to create a program that validates an inputted date using C#, thus this will determine if a date is invalid or not. Here, we will use the IsDate Function.

So, now let's start this tutorial!

1. Let's start with creating a Windows Form Application in C# for this tutorial by following the following steps in Microsoft Visual Studio: Go to File, click New Project, and choose Windows Application and name your project as Valid or Invalid Date.

2. Next, add only one Textbox named TextBox1. Then add a button named Button1 labeled as "Validate" for us to know that the date we have entered in our TextBox is a valid date or not. You must design your interface like this:



3. Now, put this code in Button1_Click. This will determine if the date is valid or not in our inputted textbox.

1. public
   
   void
   
   Button1_Click(
   
   System
   
   .
   
   Object
   
   sender, System
   
   .
   
   EventArgs
   
   e)
   
2. {
   
3. MessageBox.
   
   Show
   
   (
   
   TextBox1.
   
   Text
   
   +
   
   " is a valid date: "
   
   +
   
   Information.
   
   IsDate
   
   (
   
   TextBox1.
   
   Text
   
   )
   
   )
   
   ;
   
4. }
   

This IsDate function in Information class here checks if the given expression is a valid date and returns a boolean true or false. IsDate returns True if Expression is of the Date Data Type or can be converted to Date; otherwise, it returns False.IsDate returns True if Expression represents a valid date, a valid time, or a valid date and time.

Press F5 to run the program.

Output:


Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer

If you have some queries, feel free to contact the number or e-mail below.
Mobile: 09488225971
Landline: 826-9296
E-mail:[email protected]

Add and Follow me on Facebook: https://www.facebook.com/donzzsky

Visit and like my page on Facebook at: https://www.facebook.com/BermzISware

Download