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POHow can I resize an image from a database in C#, in good quality
 

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  1. POHow can I resize an image from a database in C#, in good quality
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    <p>I have the following C# code (not mine) which pulls an image out of a database and displays it on a web page:</p> <pre><code>public partial class Image : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { getFullImage(); } public void getFullImage() { SqlConnection objCon = new SqlConnection(); objCon = new SqlConnection(Globals.ConnectionString); objCon.Open(); String TmpStr; try { byte[] imgData = null; SqlCommand objCmd = new SqlCommand("Select * from Login where user_Name='" + Request["Id"].ToString() + "'", objCon); SqlDataReader reader = objCmd.ExecuteReader(); while (reader.Read()) { HttpContext.Current.Response.Clear(); HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" + reader["ImageName"]); imgData = (byte[])reader["ImageFile"]; TmpStr = reader["ImageFile"].ToString(); TmpStr = TmpStr.Substring(1, TmpStr.Length - 1); } HttpContext.Current.Response.ContentType = "image/jpeg"; HttpContext.Current.Response.BinaryWrite(imgData); } catch(Exception ex) { Response.Write(ex.Message.ToString()); } finally { } } } </code></pre> <p>I know it's probably really bad practice to store images in a database and use them in this way, but I'm not a hardcore .NET dev and can't rewrite this whole thing (much as I'd love to be able to!).</p> <p>Anyhow, currently the method above creates full size (often huge) images, which are then resized using CSS, which causes them to degrade terribly in quality. I wondered if there was anything I could do to resize the image prior to render, so improve quality and reduce load time?</p> <p>Thanks for any pointers folks...</p>
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    1. USDan
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    1. COSuggestion, somewhat unrelated: An ASP.NET `Page` (usually used as .aspx) derives from IHttpHandler and adds the whole lifecycle: OnPreInit, OnInit, Page_load, OnPreRender, OnRender, maintaining ViewState, etc. In this case you are never displaying a page, so this code should use a custom handler that derives directly from IHttpHandler (usually .ashx), removing the unnecessary `Page` overhead. In VS the item template is called "Generic Handler".
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      1. POHow can I resize an image from a database in C#, in good quality
      1. USNelson Rothermel
 

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