ashx檔案，我們可用用來作圖檔加載（在之前我們一般使用aspx或者webservice去做），一般做法如下：
handler.ashx：
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<%@ webhandler language="c#" class="handler" %>
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using system;
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using system.io;
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using system.web;
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public class handler : ihttphandler {
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public bool isreusable {
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get {
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return true;
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}
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}
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public void processrequest (httpcontext context) {
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context.response.contenttype = "image/jpeg";
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context.response.cache.setcacheability(httpcacheability.public);
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context.response.bufferoutput = false;
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photosize size;
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switch (context.request.querystring["size"]) {
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case "s":
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size = photosize.small;
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break;
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case "m":
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size = photosize.medium;
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case "l":
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size = photosize.large;
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default:
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size = photosize.original;
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}
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int32 id = -1;
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stream stream = null;
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if (context.request.querystring["photoid"] != null && context.request.querystring["photoid"] != "") {
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id = convert.toint32(context.request.querystring["photoid"]);
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stream = photomanager.getphoto(id, size);
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} else {
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id = convert.toint32(context.request.querystring["albumid"]);
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stream = photomanager.getfirstphoto(id, size);
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if (stream == null) stream = photomanager.getphoto(size);
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const int buffersize = 1024 * 16;
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byte[] buffer = new byte[buffersize];
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int count = stream.read(buffer, 0, buffersize);
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while (count > 0) {
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context.response.outputstream.write(buffer, 0, count);
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count = stream.read(buffer, 0, buffersize);
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*.aspx:
<img src="myhttphander.ashx?id=123" width="20" height="20" />
我們變通以下，發現其實除了可以輸出圖檔以外，還可以輸出文字：
public void processrequest (httpcontext context) {
context.response.contenttype = "text/plain";
context.response.write("alert('hi')");
}
public bool isreusable {
get {
return false;
}
彈出alert
<script src="handler.ashx"></script>
也可以把.ashx當成css檔案
<link href="css/handler.ashx" rel="stylesheet" type="text/css">
xml檔案
orderdoc.load("handler.ashx");
還可以嵌入文字：
<%@ webhandler language="c#" class="testhandler" %>
public class testhandler : ihttphandler {
context.response.write("document.write(\"hello world\");");
<script type="text/javascript" src="testhandler.ashx" />
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