how to validate textbox with previous year

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Dear All, have a good day.

How to Validate Textbox with Previous Year.
==========================================

I have a Textbox on my webform, in that user must enter only Next year dates(upcoming years date) like 2013 , 2014,2015 like this.

He should not enter 2007,2008,2009....if he enter like this previous year..,a message must be displayed ."Please enter Valid date"

Please give me a good solution,

Thank you sir.

Posted 15-Jul-12 20:31pm

Software Engineer 892

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Mohamed Mitwalli · Answer 1 · 2012-07-15T21:41:00

Hi ,
Check this solution , Just use CompareValidator ValueToCompare="2012" Operator="GreaterThan" only this proprieties you have to care about to cause the validation and ErrorMessage to Give the Error message you want .

HTML

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
      <asp:CompareValidator ID="CompareValidator1" runat="server"
          ControlToValidate="TextBox1" Display="Dynamic" ErrorMessage="invalid year........ "
          Operator="GreaterThan" Type="Integer" ValueToCompare="2012"></asp:CompareValidator>

StianSandberg · Answer 2 · 2012-07-15T20:55:00

You could create a DateRange validator like this:

C#

[AttributeUsage(AttributeTargets.Property)]
   public class DateIsNextYear : ValidationAttribute
   {
       public DateIsNextYear(string errorMessage = "")
       {
           ErrorMessage = errorMessage;
       }

       protected override ValidationResult IsValid(object value, ValidationContext validationContext)
       {
           if ((value == null) || (string.IsNullOrEmpty(value.ToString())))
               return null;

           try
           {
               var date = DateTime.Parse(value.ToString());
               var nextyear = DateTime.Now.Year + 1;
               if ((date >= new DateTime(nextyear , 1, 1)) && (date <= new DateTime(nextyear , 12, 31)))
                   return ValidationResult.Success;
               return new ValidationResult(ErrorMessage);
           }
           catch
           {
               return new ValidationResult(FormatErrorMessage(validationContext.DisplayName));
           }
       }
   }

And use it for yourobject:

C#

public class MyObject
    {
        [DateIsNextYear("This date is not next year!")]
        public DateTime DateToFillIn { get; set; }
    }

You can easily modify this to validate only dates higher than today etc..

Sandeep Mewara · Answer 3 · 2012-07-15T20:55:00

There can be various ways. Simplest would be to have a Javascript validation for it. Try something like:

HTML

<asp:Textbox ID="myTextbox" runat="server" />
<asp:Button ID="Submit Value" runat="server" OnClientClick="ValidateYear();" />

JavaScript

function ValidateYear()
{
  var d = new Date(); // This will get you current date
  var currentYear = d.getFullYear();
  
  var currentValue = document.getElementById('<%= myTextbox.ClientID %>').value;

  if(parseInt(currentValue) <= parseInt(currentYear))
  {
     alert("Please enter valid date!");
     return false;
  }
  return true;
}

Try!

P.S.: There might be few validations you need to take care of. This is a raw implementation.

how to validate textbox with previous year

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