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How to show user message when used types date that is less than MinDate

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DatePicker
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John
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John asked on 21 Jul 2015, 11:27 AM

Hello,

At the moment I am setting the MinDate and MaxDate properties on a RadDatePicker ‚Äčin the code behind. This works well with regard to the calendar because it is not possible to select dates outside of the range with the mouse.

However, the user may still enter dates by typing. At the moment, the default behaviour isn't great. What I would is to present the user with a meaningful message if they type a date outside of the range, preferably when the control loses focus.

I am wondering what the best way to do this is? Do I need to implement something based on <asp:CompareValidator/> or is there a better way?

Thanks in advance,

John.

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Eyup
Telerik team
answered on 24 Jul 2015, 09:02 AM
Hello John,

The most straightforward approach would be to disable the input typing:
<DateInput runat="server" ReadOnly="true"></DateInput>

The alternative way is to use the OnError client-side event handler:
http://docs.telerik.com/devtools/aspnet-ajax/controls/input/client-side-programming/events/onerror

For your convenience, I have created a sample implementation:
<telerik:RadDatePicker ID="RadDatePicker1" runat="server" MinDate="2015/7/7">
    <DateInput runat="server">
        <ClientEvents OnError="pickerError" />
    </DateInput>
</telerik:RadDatePicker>
JavaScript:
function pickerError(sender, args) {
    var reason = args.get_reason();
    if (reason == 2) {
        alert("Please choose within the range");
    }
}

Hope this helps. Please give it a try and let me know if it works for you.

Regards,
Eyup
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John
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answered on 03 Sep 2015, 02:29 PM
Thank you for your reply and apologies for the delay. I had actually moved on to another issue in the meantime. I will bear this solution in mind however, should we need to do something similar again. 
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Eyup
Telerik team
answered on 08 Sep 2015, 11:13 AM
Hi John,

Please take your time to examine the suggested approach.
Feel free to turn to us if new questions arise.

Regards,
Eyup
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John
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