Compare Validation of Two DropDownList filled with Time Value

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Hi,

I am using Asp.Net with C#.
I have 4 dropdownlists 1st and 3 Dropdownlist contains Hours as List Items starting from 00-23(hours), 2nd and 4th one contains Minutes as ListItems starting from 00 to 59(minutes). Now how do i compare hours dropdownlist values in order to find time difference.

Is there any Validation control to validate it at client side?

Can we do Compare Validation of Two DropDownList filled with Time Value?

if anybody know answer for this please reply it to me.

Thanks

Posted 16-Feb-11 3:19am

kenn007

Updated 16-Feb-11 3:21am

v2

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Sandeep Mewara 16-Feb-11 9:55am

Winforms or ASp.NET?

2 solutions

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Ryan Zahra · Answer 1 · 2011-02-16T03:46:00

Client side date difference with javascript:

<script type="text/javascript">

var date1 = new Date(2011, 1, 16);  //Months are 0-11 in javascript
var date2 = new Date(2011, 1, 1);

//get 1 day in milliseconds
var one_day = 1000*60*60*24;

document.write(Math.ceil((date1.getTime() - date2.getTime()) / one_day);

</script>

Abdul Quader Mamun · Answer 2 · 2011-02-16T03:48:00

Use custom validation. Example of custom validation control bellow:

XML

<asp:Label id=lblOutput runat="server"
           Text="Enter an even number:"
           Font-Name="Verdana"
           Font-Size="10pt">


<asp:CustomValidator id="CustomValidator1"
           ControlToValidate="Text1"
           OnServerValidate="ServerValidation"
           Display="Static"
           ErrorMessage="Not an even number!"
           ForeColor="green"
           Font-Name="verdana"
           Font-Size="10pt"
           runat="server">

      <asp:Button id="Button1"
           Text="Validate"
           OnClick="ValidateBtn_OnClick"
           runat="server"/>

C#

void ValidateBtn_OnClick(object sender, EventArgs e)
     {
        if (Page.IsValid)
        {
           lblOutput.Text = "Page is valid.";
        }
        else
        {
           lblOutput.Text = "Page is not valid!";
        }
     }
     void ServerValidation (object source, ServerValidateEventArgs arguments)
     {
        int i = int.Parse(arguments.Value);
        arguments.IsValid = ((i%2) == 0);
     }

Compare Validation of Two DropDownList filled with Time Value

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