Disable Future / Past Dates in Calendar - .NET Applications

Introduction

This tip will help you disable future or past dates from a calendar in .NET application.

Background

It is a prerequisite to have knowledge of Calendar control in .NET.

Using the Code

Drag a Calendar Control from the Tool box of your design page.

Your aspx code will look like below.

Specify event OnDayRender event in your aspx code. Add a name to the event.

<asp:Calendar ID="CalendarID" runat="server" DatePickerMode="true" 
OnDayRender="Calendar1_DayRender" onselectionchanged="Calendar_SelectionChanged">
</asp:Calendar> 

You need to add the event in your code behind file.

The below code will disable all the future dates from the current date.

    protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
        {
            if (e.Day.Date > DateTime.Today)
            {
                e.Day.IsSelectable = false;
            }
        }  

The below code will disable all the past dates from the current date.

 protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
        {
            if (e.Day.Date < DateTime.Today)
            {
                e.Day.IsSelectable = false;
            }
        }   

Happy coding! :)

Points of Interest

This is better than throwing an error on future/past date selection. :)

History

• 12^th May, 2014: Initial post