Thumbnail en asp sin componentes

[yomesmo]

Bueno, si existe una forma, simplemente se precisa que el servidor tenga instalado ASP.NET (Todos los windows lo tienen), funciona perfectamente, yo lo tengo en todas mis webs, puede verlo funcionar en:
http://www.portalmotos.com
la gente pone un anuncio y la foto se autoredimensiona y se genera el thumbnail


te pongo el fichero:

<%@ Page Language="C#"%>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<script runat="server">
// Smart Image Processor 1.1
// Version: 1.1.2

void Page_Load(Object s, EventArgs e) {

int intNewWidth,intNewHeight, maxWidth = 10000, maxHeight = 10000, qQuality = 80;
if ( Request["w"] != null) maxWidth = int.Parse(Request["w"]);
if ( Request["h"] != null) maxHeight = int.Parse(Request["h"]);
if ( Request["q"] != null) qQuality = int.Parse(Request["q"]);

//get image from parameter
string pictureFileName = Request["f"];
string newFileName = Request["nf"];
if (pictureFileName == null || pictureFileName == "" || !System.IO.File.Exists(pictureFileName)) {
Response.Write("Error: File (" + pictureFileName + ") not found or empty");
return;
}
System.Drawing.Image inputImage = System.Drawing.Image.FromFile(pictureFileName);

//define size for new image
string aspect = Request["a"];
if (aspect == "true") {
if (maxWidth < inputImage.Width || maxHeight < inputImage.Height) {
if (maxWidth >= maxHeight) {
intNewWidth = (int)((double)maxHeight*((double)inputImage.Width/(double)inputImage.Height));
intNewHeight = maxHeight;
} else {
intNewWidth = maxWidth;
intNewHeight = (int)((double)maxWidth*((double)inputImage.Height/(double)inputImage.Width));
}
if (intNewWidth > maxWidth) {
intNewWidth = maxWidth;
intNewHeight = (int)((double)maxWidth*((double)inputImage.Height/(double)inputImage.Width));
}
if (intNewHeight > maxHeight) {
intNewWidth = (int)((double)maxHeight*((double)inputImage.Width/(double)inputImage.Height));
intNewHeight = maxHeight;
}
} else {
intNewWidth = inputImage.Width;
intNewHeight = inputImage.Height;
}
} else {
intNewWidth = maxWidth;
intNewHeight = maxHeight;
}

try {
//output new image with different size
Bitmap outputBitMap = new Bitmap(inputImage,intNewWidth,intNewHeight);
inputImage.Dispose();
EncoderParameters eps = new System.Drawing.Imaging.EncoderParameters(1);
eps.Param[0] = new System.Drawing.Imaging.EncoderParameter( System.Drawing.Imaging.Encoder.Quality, qQuality );
ImageCodecInfo ici = GetEncoderInfo("image/jpeg");
if (pictureFileName.ToLower() == newFileName.ToLower())
System.IO.File.Delete(pictureFileName);
outputBitMap.Save( newFileName, ici, eps );
outputBitMap.Dispose();
}
catch (Exception ex) {
Response.Write("Error: " + ex);
return;
}

Response.Write(intNewWidth + ";" + intNewHeight + ";" + "DONE");
}

private static ImageCodecInfo GetEncoderInfo(String mimeType) {
int j;
ImageCodecInfo[] encoders;
encoders = ImageCodecInfo.GetImageEncoders();
for(j = 0; j < encoders.Length; ++j) {
if(encoders[j].MimeType == mimeType)
return encoders[j];
}
return null;
}

</script>


Este código lo pegas en una hoja y la llamas como quieras con la extensión .aspx

Suerte!!