Google like Calendar in ASP.NET (AJAX)

• Download demo - 34.26 KB
• Download database - 572 B

Introduction

If you have got a Gmail account, you can access and use the Google calendar where you can add, update and delete events. You can also drag and drop an event from one date to another. There is also a facility to resize the event.

Now I tried to cover most functionalities with the help of AJAX. When you add an event in Google calendar, it shows a window just like tool tip where you can add or delete an event and here I opened a new window to add an event.

You have also got a facility to set the background color of an event in my code.

How It Works?

• New event: Hold your mouse down and drag down
• Move event: Hold your mouse down at the top of an event and drag
• Resize event: Hold your mouse down at the bottom of an event and drag
• Edit event: Double click at the middle of an event and wait until a new popup appears
• Delete event: Click on event and press delete key on your keyboard or click on close button top left corner

Using the Code

You just have to create a database on SQL Server and run the SQL query attached with the article in zip format. Change the connection string according to your convenience in the application's web.config file.

HTML Code

The default time settings in calendar are in HH:MM AM/PM format. If you want to set the time in 24 hour format, please read the following code. Make the following changes in Calender.aspx page.

    <div id="demo_cal_hours">
        <%
            string suffix="";
            string hour = "";            
           
            for (int no = startHourOfWeekPlanner; no <= endHourOfWeekPlanner; no++)
            { 
                              
                hour = no.ToString();
               // un-comment if you want to set the time in 24 hours format
               // suffix = "0";               
               // comment the following 2 lines of code if you want to 
	      // set the timing in 24 hours
                 suffix = origin.ToString("tt");
                 hour = origin.ToString("hh");   
                time = "<span style='font-size:16px;'>" + hour.ToString() + 
		"</span>" + "<span class=\"content_hour\" >" + suffix + "</span>";
                origin = origin.AddMinutes(60);
                
          %>
          <div class="demoContentTime"><% Response.Write(time); %></div>
          
  <%
            } %>
  
  </div>

C# Code

Make the changes in the following code if you want to set the start and end Hour in the calendar. Make changes in startHourOfWeekPlanner and endHourOfWeekPlanner global variables. You can get this code in Calendar.aspx page.

public int startHourOfWeekPlanner = 8; // Start hour of Calender
public int endHourOfWeekPlanner = 21;  // End hour of Calender.
public double date = 0;
public string time="";
public DateTime origin;
// The following code converts DateTime to Unix timestamp.
protected void Page_Load(object sender, EventArgs e)
{    
    string dat = "1970-1-1";
    origin = new DateTime(DateTime.Now.Year, 
    DateTime.Now.Month, DateTime.Now.Day, 8, 0, 0, 0);
    TimeSpan diff = origin - Convert.ToDateTime(dat);
    date = Math.Floor(diff.TotalSeconds);
}

JavaScript Code

The following code is called on body load event. You can find the code in new-Cal.js file.

function initCalendar()
{
     demo_container = document.getElementById('demo_container');
     if(!document.all)demo_container.onclick = ffEndEdit;
     demo_cal_appointments = document.getElementById('demo_cal_appointments');
     var subDivs = demo_cal_appointments.getElementsByTagName('DIV');
     for(var no=0;no<subDivs.length;no++){
      if(subDivs[no].className=='demo_appointHour'){
       subDivs[no].onmousedown = initNewAppointment;
   
       if(!SetnewAppointmentWidth)SetnewAppointmentWidth = subDivs[no].offsetWidth;
          }
      if(subDivs[no].className=='demo_appoint_day'){
       dayPositionArr[dayPositionArr.length] = getLeftPos(subDivs[no]);
      }
  
     }
     if(initilizeTopHours > CalenderStartHour)document.getElementById
	('demo_cal_content').scrollTop = ((initilizeTopHours - CalenderStartHour)*
	(itemRowHeight+1));
 
     SetappointmentsOffsetTop = getTopPos(demo_cal_appointments);
     SetappointmentsOffsetLeft = 2 - Number(appointMarginSize);
 
     document.documentElement.onmousemove = schedulerMouseMove;
     document.documentElement.onselectstart = cancelSelectionEvent;
     document.documentElement.onmouseup = schedulerMouseUp;
     document.documentElement.onkeydown = schedulerKeyboardEvent;
     var tmpDate = new Date();
     var dateItems = initDateToShow.split(/\-/g);
     tmpDate.setFullYear(dateItems[0]);
     tmpDate.setDate(Number(dateItems[2])/1);
     tmpDate.setMonth(Number(dateItems[1])/1-1);
     tmpDate.setHours(1);
     tmpDate.setMinutes(0);
     tmpDate.setSeconds(0);
 
      var day = tmpDate.getDay();
      if(day==0)day=7;
     if(day>1){
       var time = tmpDate.getTime();
      time = Number(time) - (1000*60*60*24) * (Number(day)-1);
      tmpDate.setTime(time); 
     }
     SetdateStartOfWeek = new Date(tmpDate);
 
     updateTopHeadDates();
 
     if(get_items_from_db){
      getItemsFromDBServer();  
    }
}

In the above script, function schedulerMouseMove is called on mousemove event, cancelSelectionEvent is called on selectstart event, schedulerMouseUp is called on mouseup event and schedulerKeyboardEvent is called on keydown event.

Compatible Browsers

I have tested the application on the following browsers: Internet Explorer 7, Firefox 2.0.0.20.

History

• First version uploaded on March-08-2009