All chapters on a single page

1. Installation

You don't need to install anything to start using the DayPilot component. Just reference the assembly in your project. It's also possible to add the DayPilot to your Visual Studio Toolbox so you drag the component onto your web form and set the properties visually.

Adding the component to the Visual Studio Toolbox:

1. Right-click the toolbox and select "Choose Items...".


2. In the "Choose Toolbox Items" dialog click "Browse...".


2. Find the DayPilot assembly and click OK.


3. Close the "Choose Toolbox Items" dialog by clicking "OK" and you will see the DayPilot icon in the toolbox:


4. Now you can drag the icon to your WebForm and you will see the DayPilot object:


5. You can set the DayPilot properties in the "Properties" window:


2. Data binding

The only required step to make DayPilot working is to bind it to a data source. You can either set DataSource property directly or use DataSourceID.

Let's have a following table:

1Lunch2006-06-01 12:00:002006-06-01 12:30:00
2Dinner2006-06-01 19:00:002006-06-01 21:00:00
3Sleep2006-06-01 22:00:002006-06-02 07:00:00
4Breakfest2006-06-02 07:30:002006-06-02 08:30:00

In order to show the events in DayPilot calendar you have to do the following steps:

  1. Place the DayPilot control on a WebForm.
  2. Set the DataSource property.
  3. Set column name properties.
  4. Select the days that will be shown.
  5. Call DataBind().

Setting the DataSource property

After loading a DataTable from a database (or other source) you should assign it to the DayPilotCalendar.DataSource property:

DayPilotCalendar1.DataSource = MyDataTable;

In our example we are building the DataTable by hand:

DataTable dt;
dt= new DataTable();
dt.Columns.Add("start", typeof(DateTime));
dt.Columns.Add("end", typeof(DateTime));
dt.Columns.Add("name", typeof(string));
dt.Columns.Add("id", typeof(string));
DataRow dr;

dr = dt.NewRow();
dr["id"] = 0;
dr["start"] = Convert.ToDateTime("15:30").AddDays(1);
dr["end"] = Convert.ToDateTime("16:30").AddDays(1);
dr["name"] = "Partner conf. call";

// ...

return dt;

When loading the events from a database I recommend limiting the SELECT so only the necessary events are loaded (not all events from the table). DayPilot will work properly in both cases (it only select the relevant events) but all the events will have to be loaded and they will be stored in the ViewState.

Setting column name properties

You need to indicate which columns contain the necessary data:

DayPilotCalendar1.DataStartField = "start";
DayPilotCalendar1.DataEndField = "end";
DayPilotCalendar1.DataTextField = "name";
DayPilotCalendar1.DataValueField = "id";

You can also set these properties in the visual designer:


Setting the visible dates

Let's say we want to show just a single day:

DayPilotCalendar1.StartDate = Convert.ToDateTime("1 June 2006"); 

But we can show multiple days as well. This is a new feature of DayPilot 2.0.

DayPilotCalendar1.StartDate = Convert.ToDateTime("1 June 2006"); 
DayPilotCalendar1.Days = 5;



Data binding

Bind the data in the Page_Load() method:

if (!IsPostBack)

3. Data-related properties overview

Here are the data-related properties of DayPilotCalendar:

PropertyDescriptionTypeDefault value
DataSourceSource of event data.IListSource, IEnumerable, or IDataSource (including DataSet, DataTable, DataView, ArrayList)null
DataSourceIDId of data source component.stringnull
DataStartFieldName of the data source column that contains the event start date and time.stringnull
DataEndFieldName of the data source column that contains the event end  date and time.stringnull
DataTextFieldName of the data source column that contains the event name.stringnull
DataValueFieldName of the data source column that contains the event ID. The Id will be passed to the event handling code when clicking on the event.stringnull
StartDateThe first date that should be shown by the calendar.DateTimeDateTime.Today
DaysThe number of days to be shown. Minimum is 1 and maximum 21.int1

4. Integration with System.Web.Ui.WebControls.Calendar

For switching the date you can use the standard .NET Framework control System.Web.UI.WebControls.Calendar. You can use the PostBack event to change the DayPilot StartDate and Days properties.


In our sample we will use the DayRender event to improve the calendar:

  • the days will become links to a specific day (i.e. no PostBack)
  • the days that contain an event will be bold
private void Calendar1_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e)
	string fontWeight = "normal";
	if (isThereEvent(e.Day.Date))
		fontWeight = "bold";

	string color = "black";
	if (e.Day.IsOtherMonth)
		color = this.Calendar1.OtherMonthDayStyle.ForeColor.Name;

	e.Cell.Text = String.Format("<a href='Default.aspx?day={0:d}' style='color: "
		+ color + ";text-decoration:none; font-weight:" 
		+ fontWeight + "'>{1}</a>", e.Day.Date, e.Day.Date.Day);		

The method isThereEvent() returns true if a specific day contains any event. This method will be specific to your application. You can go through the data returned from the database (and supplied to DayPilotCalendar.DataSource) to avoid another database request.  We are not using the database in our sample so it is hard-coded:

private bool isThereEvent(DateTime date)
	DateTime today = DateTime.Now;
	DateTime tomorrow = today.AddDays(1);
	DateTime anotherDay = today.AddDays(3);

	// there are events today
	if ((date.DayOfYear == today.DayOfYear) && (date.Year == today.Year))
		return true;

	// there are events tomorrow
	if ((date.DayOfYear == tomorrow.DayOfYear) && (date.Year == tomorrow.Year))
		return true;

	// there are events on another day
	if ((date.DayOfYear == anotherDay.DayOfYear) && (date.Year == anotherDay.Year))
		return true;

	return false;

5. Changing the appearance

There are many options to change the default appearance:

PropertyDescriptionTypeDefault value
BackColorBackground color of a standard hour cell (business hours).Color#FFFFD5
BorderColorColor of the calendar border.Color#000000
DayFontFamilyFont of the day header.stringTahoma
DayFontSizeSize of the day header.Unit10pt
EventBackColorBackground color of an event.Color#FFFFFF
EventBorderColorColor of the event border.Color#808080
EventFontFamilyFont of the event text.stringTahoma
EventFontSizeSize of the event text.Unit8pt
EventHoverColorBackground color of an event when the cursors hovers over it. Color#DCDCDC
EventLeftBarColorColor of the bar on the left side of an event.Color#0000FF
HourBorderColorColor of the border between two the last half in an hour and the following hour.Color#EAD098
HourFontFamilyFont of the hour name.stringTahoma
HourFontSizeSize of the hour name.Unit16pt
HourHalfBorderColorColor of the border between the first and the second half in an hour.Color#F3E4B1
HourNameBackColorBackround color of the hour name.Color#ECE9D8
HourNameBorderColorColor of the border between hour names (vertical separator).Color#ACA899
HoverColorBackground color of an hour cell when the cursor hovers over it.Color#FFED95
NonBusinessBackColorBackground color of a non-business hour cell.Color#FFF4BC
HourHeightHour height in pixels. Minimum is 30. It must be even. int40
HourWidthWidth of the hour name in pixels.int40
BusinessBeginsHourHour when the business hours start.int9
BusinessEndsHourHour when the business hours end.int18
NonBusinessHoursDetermines whether the non-business hours should be visible (if there is no event).NonBusinessHoursBehaviorNonBusinessHoursBehavior.HideIfPossible
ShowHoursDetermines whether the hour names column should be visible.booltrue
TimeFormatThe time format - 12-hours cycle (3 PM) or 24-hours cycle (15:00).TimeFormatTimeFormat.Clock12Hours
WidthWidth of the control.Unitnull

6. Handling user actions

DayPilot Lite supports two user actions:

  • clicking a free time cell (you will typically use this action to create a new event)
  • clicking an event (you will typically use this action to show event details)

The actions can be handled on the client (by custom JavaScript code) or on the server (by handling the server event).

PropertyDescriptionTypeDefault value
EventClickHandlingHandling of a click on a calendar event.EventClickHandlingEnumEventClickHandlingEnum.JavaScript
TimeRangeSelectedHandlingHandling of a click on a free-time slot.TimeRangeSelectedHandlingTimeRangeSelectedHandling.JavaScript
EventClickJavaScriptJavaScript code that should be executed when the user clicks on a calendar event (provided that EventClickHandling is set to JavaScript). The string "{0}" will be replaced with an event ID.string"alert('{0}');"
TimeRangeSelectedJavaScriptJavaScript code that should be executed when the user clicks on a free-time slot (provided that TimeRangeSelectedHandling is set to JavaScript). The string "{0}" will be replaced with the date and time specified in the standard format produced by DateTime.ToString("s") - e.g. "2006-05-15T07:00:00".string"alert('{0}');"

For more about server-side event handling see Server-side event handling.


The typical action for clicking a free time slot will be creating a new event. You can use the following JavaScript code to redirect the user to a page with new event details:

Set TimeRangeSelectedJavaScript to "document.location='NewEvent.aspx?startingtime={0}';"

In the NewEvent.aspx take the Request.QueryString["startingtime"] value and convert it to DateTime:

DateTime startingTime;
if (Request.QueryString["startingtime"] != null)
  startingTime = Convert.ToDateTime(Request.QueryString["startingtime"]);

Then you can use the value to prefill a form with date and time specification.

7. Server-side event handling

EventClickOccurs when the user clicks on an event and EventClickHandling property is set to PostBack.
TimeRangeSelectedOccurs when the user clicks on an event and TimeRangeSelectedHandling property is set to PostBack.

Your server-side event handling methods will get the important data:

EventClick knows the event value (PK column)

The e argument of EventClick handler (EventClickEventArgs) holds is the value of the clicked event (DataValueField) in e.Value.

protected void DayPilotCalendar1_EventClick(object sender, EventClickEventArgs e)
  Label1.Text = "Selected event: " + e.Value;

TimeRangeSelected knows the time clicked

protected void DayPilotCalendar1_TimeRangeSelected(object sender, TimeRangeSelectedEventArgs e)
  Label1.Text = "Selected time: " + e.Start;

8. Choosing DayFormat - DateTime.ToString() parameters

The DayFormat property specifies the DateTime format to be used for day headers. It accepts the same string as DateTime.ToString(string).

Standard format examples

Here are the examples for EN-US locale:  

DayFormat valueSample header
"D"Monday, June 5, 2006
"m" or "M"June 5

Custom format examples

DayFormat valueSample header
"d MMMM yyyy"5 June 2006

DayPilot for JavaScript, ASP.NET WebForms, ASP.NET MVC, Java