Enabling or disabling a validator control in javascript
Recently I had to have a form that had a requiredfieldvalidator that was supposed to validate only on certain conditions. I did not want the validator to validate its control (textbox B) unless textbox A had a value in it. I decided the best way to do this was to capture the keyup event of textbox A and if there was a value in the textbox, to turn the validator for textbox B on. To do that via javascript, you have to utilize the asp.net built in javascript function ValidatorEnable.
<script type="text/javascript"> var makeEnabled = true; var validatorControl = document.getElementById('<%= RequiredFieldValidator1.ClientID %>'); ValidatorEnable(validatorControl, makeEnabled); </script>
Budapest Table Sorting Plugin
Budapest is a jQuery plugin that allows for simple table sorting. It allows the developer to have full control over the sorting.
Basic usage:
$("table").budapest();
Advanced usage:
$("table").budapest({ headers: { 0: { sortable: true}, 1: { sortable: true}, 2: { sortable: true} }, sortIndex: 2, sortDirection: "asc", onSort: function(index, val1, val2, direction){ //provide your own sorting algorithm for each column! //must return either -1, 0, or 1 }, onSorted: function(index, direction){ //this event is fired after each sort! } });
Create an ical file in ASP.NET MVC
I recently had to write some code that generates an ical file and sends it to the browser. I decided to utilize the awesomeness that is asp.net mvc and try it like that. Following the information I got from reading Stephen Walther’s blog entry on using MVC to generate files to download, I started by creating a MVC controller that processes the request.
Public Class ICalController Inherits Controller Private _sessionRepo As ISessionRepository Private _locationRepo As ILocationRepository Public Sub New(ByVal sessionRepo As ISessionRepository, _ ByVal locationRepo As ILocationRepository) _sessionRepo = sessionRepo _locationRepo = locationRepo End Sub Public Function SessionEvent(ByVal sessionID As Long) As ActionResult Dim s As SessionsEntity = _sessionRepo.GetSession(sessionID) Dim loc As LocationsEntity = _locationRepo.Get(s.LocationID) Return ICalEvent("session.ics", loc.CodeAndName, _ s.SessionName, s.SessionName, _ s.StartDateUTC, s.EndDateUTC) End Function End Class
I then created a custom ActionResult that creates the actual ical file. Not surprisingly I called it ICalEventResult. I created an DateTime extension method to format the utc dates into the correct format for the ical file (I won’t include it here).
Public Class ICalEventResult Inherits ActionResult Private _startUtc As DateTime Private _endUtc As DateTime Private _summary As String Private _description As String Private _location As String Private _fileName As String Public Sub New(ByVal startUtc As DateTime, ByVal endUtc As DateTime, _ ByVal summary As String, ByVal description As String, _ ByVal location As String, ByVal fileName As String) _startUtc = startUtc _endUtc = endUtc _summary = summary _description = description _location = location _fileName = fileName End Sub Public Overrides Sub ExecuteResult(ByVal context As System.Web.Mvc.ControllerContext) Dim str As New StringBuilder() With str .AppendLine("BEGIN:VCALENDAR") .AppendLine("VERSION:2.0") .AppendLine("BEGIN:VEVENT") .AppendLine(String.Format("DTSTART:{0}", _startUtc.ToUniversalTimeString)) .AppendLine(String.Format("DTEND:{0}", _endUtc.ToUniversalTimeString)) .AppendLine(String.Format("SUMMARY:{0}", _summary)) .AppendLine(String.Format("DESCRIPTION:{0}", _description)) .AppendLine(String.Format("LOCATION:{0}", _location)) .AppendLine("END:VEVENT") .AppendLine("END:VCALENDAR") End With context.HttpContext.Response.ContentType = "text/calendar" context.HttpContext.Response.AddHeader("Content-disposition", String.Format("attachment; filename={0}", _fileName)) context.HttpContext.Response.Write(str.ToString) context.HttpContext.Response.End() End Sub End Class
Finally I created a controller extension method called ICalEvent that simply returns an instance of the ICalEventResult.
