Generating PDF forms in .NET has always been somewhat messy and complicated. I’ve seen people convert raw HTML to PDF or adding and formatting form elements to a PDF doc in code behind, etc. All those methods are highly time consuming and tricky. Easiest way to create PDF Forms is by using iTextSharp (open source) [...]
Tags: itextsharp, pdf
Here’s a basic ADO.NET data access template with a SqlCacheDependency. Just wanted to post this for my future reference. public static DataSet GetData(long itemID) { DataSet ds = new DataSet(); string cacheKey = Helpers.GetCacheKey(itemID); //Get a cache key unique to this method. if (HttpContext.Current.Cache[cacheKey] != null) { ds = (DataSet)HttpContext.Current.Cache[cacheKey]; } else { using (SqlConnection [...]
Tags: ado.net, bestpractice
Some time ago I kept getting this error in one of the projects I was working on: The Controls collection cannot be modified because the control contains code blocks (i.e. ). I spent quite some time trying to figure it out. Finally after hours of searching I found out that Code Blocks Inside Master Pages [...]
Tags: asp.net, errors, masterpages
First lets start by setting up the site in IIS… 1.Open IIS by double-clicking on Control Panel->Administrative Tools->Internet Information Services 2.Right Click on Web Sites->Default Web Site 3.Click on Properties->Home Directory and choose the location of your website Now lets give the ASPNET account the appropriate permissions to access that directory… 4. Using My Computer [...]
if (Cache.Count > 0) { string currentKey = string.Empty; System.Collections.IDictionaryEnumerator cacheContents = System.Web.HttpContext.Current.Cache.GetEnumerator(); Response.Write(string.Format(“Following {0} cache keys were cleared:”, Cache.Count)); while (cacheContents.MoveNext()) { currentKey = cacheContents.Key.ToString(); Response.Write(currentKey + “”); System.Web.HttpContext.Current.Cache.Remove(currentKey); } } else { Response.Write(“Nothing to clear. Cache is empty.”); }
First lets create a sample user control called MyControl for demonstration purposes public partial class _Controls_MyControl : System.Web.UI.UserControl { private string _myProperty; public string MyProperty { get { return _myProperty; } set { _myProperty = value; } } protected void Page_Load(object sender, EventArgs e) { } } Now register this control in the web.config <pages> [...]
Tags: asp.net, usercontrols
Recently I was trying to write a little C# function for cropping images. I expected it to be a quick 5 minute task but I ended up spending a huge amount of time getting it to work correctly. I kept getting a very stubborn and mysterious error – “Invalid Parameter Used” – whenever I tried [...]