Krummelz’s gists

Krummelz / Javascript Character Input Restriction & Length Limiter

Created August 29, 2013 07:15

Restricts the characters that are entered into a textbox. Also limits the length of the value to 5. Eg: <input type="text" onkeypress="return inputLimiter(event,'Numbers', this.value)" />

	function inputLimiter(e, allow, value) {
	var AllowableCharacters = '';
	if (allow == 'Letters') { AllowableCharacters = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; }
	if (allow == 'Numbers') { AllowableCharacters = '1234567890'; }
	if (allow == 'NameCharacters') { AllowableCharacters = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-.\''; }
	if (allow == 'NameCharactersAndNumbers') { AllowableCharacters = '1234567890 ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-\''; }
	var k;
	k = document.all ? parseInt(e.keyCode, 10) : parseInt(e.which, 10);
	if (k != 13 && k != 8 && k !== 0) {
	if ((e.ctrlKey === false) && (e.altKey === false)) {

Krummelz / Javascript function to round decimal values

Created August 29, 2013 09:19

Call the method like so: onkeypress="return inputLimiter(event, 'Numbers', this.value, 5);"

	function roundNumber(number, decimal_points) {
	if (!decimal_points) return Math.round(number);
	if (number === 0) {
	var decimals = "";
	for (var i = 0; i < decimal_points; i++) decimals += "0";
	return "0." + decimals;
	}

	var exponent = Math.pow(10, decimal_points);
	var num = Math.round((number * exponent)).toString();

Krummelz / LinQ to Entities, Max Date Field, Grouped By whatever

Created August 29, 2013 09:24

URL: http://smehrozalam.wordpress.com/2009/12/29/linq-how-to-get-the-latest-last-record-with-a-group-by-clause/

	from p in PersonOrders
	// put your where clause here
	group p by p.PersonID into grp //could be grouped by anything, Grouping on Guid ID's is not a good idea
	let MaxOrderDatePerPerson = grp.Max ( g=>g.OrderDate )

	from p in grp
	where p.OrderDate == MaxOrderDatePerPerson
	select p

Krummelz / C# image processing, useful for resizing images and making thumbnails

Created August 29, 2013 09:27

Just call "ProcessImageAndItsThumbnail" with your newly uploaded image's URL, and it will resize it for you, and make a thumbnail as well. Just remember to set the sizes you want for these new images.

	protected void ProcessImageAndItsThumbnail(string url)
	{
	//make memory streams to work with the image bytes
	MemoryStream imageStream = new MemoryStream();
	MemoryStream thumbStream = new MemoryStream();

	//using, so resources get disposed automagically
	//using the uploaded image (which might be huge)
	using (System.Drawing.Image img = System.Drawing.Image.FromFile(Server.MapPath(url)))
	{

Krummelz / Useful C# Extension Methods

Created August 29, 2013 09:28

Everyone loves extension methods!

	public static bool IsNumeric(this string s)
	{
	double d = 0.0;
	return (double.TryParse(s, out d));
	}

	public static int? ToIntegerNullable(this string s)
	{
	int i = 0;
	if (int.TryParse(s, out i))

Krummelz / Serialize ANTHING to XML

Created August 29, 2013 09:33

Courtesy of @Dominic_ZA

	public static XElement Serialize(this object o)
	{
	XElement e = new XElement("property");
	PropertyInfo[] properties;
	Type _t = o.GetType();
	properties = _t.GetProperties();

	if (properties.Length == 0) //This implies that it is a VALUE TYPE
	e.SetValue(o);

Krummelz / GridView to CSV Export Utility

Created September 12, 2013 07:23

A utility class to export an ASP.NET GridView control with its contents to a CSV file.

	using System.IO;
	using System.Web;
	using System.Web.UI;
	using System.Web.UI.WebControls;

	/// <summary>
	/// Exports a GridView with its contents to a CSV file
	/// </summary>
	public class GridViewExportUtil
	{

Krummelz / Useful C# Extension Methods

Created September 12, 2013 07:26

Useful C# Extension Methods

	/// <summary>
	/// This will return a camel-cased string, so that it reads as a normal string, by adding a space before each capital letter.
	/// </summary>
	public static string SpaceOutCamelCasing(this string theWord)
	{
	char[] temp = theWord.ToCharArray();
	string Result = "";

	foreach (char c in temp)
	if (c.ToString() == c.ToString().ToUpper())

Krummelz / iTextSharp

Created August 11, 2017 07:14

Sample iTextSharp code that can be used to prevent content cutting over to the next page and being cut in half.

	// The problem is when you have a table,
	// which gets cut in half at the botto of one page,
	// and the other half shows up at the top of the next page.
	// To prevent this, you can wrap your table in a container table (with a single cell)


	PdfPTable containerTable = new PdfPTable(1);
	containerTable .WidthPercentage = 100;

	PdfPCell containerTableCell = new PdfPCell();

Jacques Dés Prés Krummelz