Active Calendar is an ASP.NET server control that allows users to select a date and/or time quickly using a professional looking date picker with a client-side managed event system. No postback to the server required, no external script file required. Active Calendar includes the Active DateTime technology. You can disable the visible calendar format and simply use the Active DateTime component of ActiveCalendar to provide a date/time selector group with client-side validation.

Requirements: .NET Framework v1.1

This ASP.NET server control creates a spreadsheet grid and enables formulas, numbers, text, labels and dates in cells. Use in financial calculators or anywhere else a spreadsheet template is used...albeit in a web page!

FAQ
What functions are supported (Sum(),Year(), etc.)?

All functionality from the .NET System.dll framework are supported. For example:
Basic math: [c0r0]+[c0r1]
System.Math namespace: Math.Pow(1+[c1r7],2)
Strings: "[c0r1]".Trim().Replace("$","").Substring(0,1)
Dates: DateTime d=new DateTime([c1r0]);return d.Year;

Formula cell references such as [c0r1] are replaced by the value of the cell, then evaluated. (Note that the value of a date cell is the number of ticks.) So the above examples might look like this before being evaluated:

Basic math: 100+200
System.Math namespace: Math.Pow(1+.045,2)
Strings: "$57".Trim().Replace("$","").Substring(0,1)
Dates:DateTime d=new DateTime(632272996777884556);return d.Year;

Formula cells are created like this:


Spread1.AddCell(new FormulaCell(1,6,"[c1r4]*[c2r6]","Formula",NumericFormats.ToTheDollar));
See below for more examples of how formula cells work. Note also that there are two kinds of formulas, simple and multiline. The example below shows both types of formulas.
Code used in this example
Initialization of a spreadsheet
Using MayerSoft.Web.Controls;
private void Page_Init(object sender, System.EventArgs e)
{
Spread1.LicenseKey="eL!NJ@2H3aF";//sample key
}
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
Spread1.Columns.Add(new Column(150));
Spread1.Columns.Add(new Column());
Spread1.AddCell(new Cell(0,0,"Item 1","Label"));
Spread1.AddCell(new Cell(0,1,"Item 2","Label"));
Spread1.AddCell(new Cell(0,2,"Total","Label"));
Spread1.AddCell(new Cell(0,3,"Div by pct","Label"));
Spread1.AddCell(new Cell(0,4,"Result","Label"));
Spread1.AddCell(new Cell(0,5,"Price