web图片如何翻转 web中,用asp:image控件展示的图片,需要能垂直翻转180°,请问该如何做?想到两种思路:1、直接改图片原文件,但可能难度较大;2、显示时给用户个按钮,点击按钮时,翻转图片。请问具体该怎么实现。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 大致确定了原因,是放在了updatepanel中,导致,请问该怎么办? 参见http://www.1lou.net/school/Javascript/0513143H010.html <html><head> <title></title> <script type="text/javascript">function rotateImage(HTMLControlID,degree) { if(window.navigator.userAgent.indexOf('MSIE') > -1) { //处理IE浏览器 var imageToRotate = document.getElementById(HTMLControlID); imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')"; var deg2radians = Math.PI * 2 / 360; var degreeToRotate =degree // 旋转度数; rad = degreeToRotate * deg2radians ; costheta = Math.cos(rad); sintheta = Math.sin(rad); imageToRotate.filters.item(0).M11 = costheta; imageToRotate.filters.item(0).M12 = -sintheta; imageToRotate.filters.item(0).M21 = sintheta; imageToRotate.filters.item(0).M22 = costheta; var w=document.getElementById(HTMLControlID).width; var h=document.getElementById(HTMLControlID).height; document.getElementById(HTMLControlID).width=h; document.getElementById(HTMLControlID).height=w; n+=1; if(n<2) { rotateImage(HTMLControlID,degree); } else { n=0; } } } </script></head><body><table width="100%" height="100%" border="0"><tr><td><A href="javascript:rotateImage('imgRotate' , 90);">旋转90度</A><A href="javascript:rotateImage('imgRotate' , 180);">旋转180度</A><A href="javascript:rotateImage('imgRotate' , 270);">旋转270度</A><A href="javascript:rotateImage('imgRotate' , 360);">原图</A></td></tr><tr><td> <canvas id="canvas" ><img id="imgRotate" src="bd8dcf53-3c57-49cd-8221-0ffc03a155dc.jpg" /></canvas></td></tr></table></body></html><script>var n=0;</script> <html><head><title></title><script type="text/javascript">function rotateImage() {imageToRotate = document.getElementById('imgRotate'); imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')";window.setTimeout("rotate()",100);}var imageToRotate;var degreeToRotate=0;function rotate(){var deg2radians = Math.PI * 2 / 360;degreeToRotate++;degreeToRotate=degreeToRotate%360; rad = degreeToRotate * deg2radians ;costheta = Math.cos(rad);sintheta = Math.sin(rad);imageToRotate.filters.item(0).M11 = costheta;imageToRotate.filters.item(0).M12 = -sintheta;imageToRotate.filters.item(0).M21 = sintheta;imageToRotate.filters.item(0).M22 = costheta; window.setTimeout("rotate()",100);}</script></head><body onload="rotateImage();"><br /> <canvas id="canvas" width="800" height="600"><img id="imgRotate" src="http://www.baidu.com/img/logo-yy.gif" /></canvas></body></html> 回楼上的几位,js最大的问题是放在updatepanel里用不了,或者很难用。有什么好的解决方法? updatepanel有个更新模式设置为Always http://topic.csdn.net/u/20100703/13/e57f5fd0-be70-4ccc-8f97-2854d5339d59.html?15741 updatepanel有什么好的?选择技术要根据自己的情况选择,当updatepanel可用可不用的时候,可以不要用了。updatepanel会导入很多js代码,影响页面加载进度 .NET界面控件贴图 DataGridView取出指定名字的列名 C# 如何实现图片背景真正透明 急如何写:分行正则表达式 c#怎么才能把显示的速度值改为电压值。。。。。大侠们给点建议。。。 C#里有没有跟vb里redim Preserve似的法法? 一个奇怪的 ajax 里的 类型转换问题 请问怎么打印dataGrid中内容, Ftp文件上传,断网后重连有延迟 万一C#中有资源泄露!?,如何发现?怎么办??? 【请教】关于结构体的问题 获取USB视频..只剩下3天时间了
http://www.1lou.net/school/Javascript/0513143H010.html
<html>
<head>
<title></title>
<script type="text/javascript">
function rotateImage(HTMLControlID,degree) {
if(window.navigator.userAgent.indexOf('MSIE') > -1)
{
//处理IE浏览器
var imageToRotate = document.getElementById(HTMLControlID); imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')";
var deg2radians = Math.PI * 2 / 360;
var degreeToRotate =degree // 旋转度数;
rad = degreeToRotate * deg2radians ;
costheta = Math.cos(rad);
sintheta = Math.sin(rad);
imageToRotate.filters.item(0).M11 = costheta;
imageToRotate.filters.item(0).M12 = -sintheta;
imageToRotate.filters.item(0).M21 = sintheta;
imageToRotate.filters.item(0).M22 = costheta;
var w=document.getElementById(HTMLControlID).width;
var h=document.getElementById(HTMLControlID).height;
document.getElementById(HTMLControlID).width=h;
document.getElementById(HTMLControlID).height=w;
n+=1;
if(n<2)
{
rotateImage(HTMLControlID,degree);
}
else
{
n=0;
}
}
}
</script>
</head><body>
<table width="100%" height="100%" border="0">
<tr><td>
<A href="javascript:rotateImage('imgRotate' , 90);">旋转90度</A>
<A href="javascript:rotateImage('imgRotate' , 180);">旋转180度</A>
<A href="javascript:rotateImage('imgRotate' , 270);">旋转270度</A>
<A href="javascript:rotateImage('imgRotate' , 360);">原图</A></td></tr>
<tr><td>
<canvas id="canvas" ><img id="imgRotate" src="bd8dcf53-3c57-49cd-8221-0ffc03a155dc.jpg" />
</canvas></td></tr></table>
</body>
</html>
<script>
var n=0;
</script>
<html>
<head>
<title></title>
<script type="text/javascript">
function rotateImage() {
imageToRotate = document.getElementById('imgRotate');
imageToRotate.style.filter= "progid:DXImageTransform.Microsoft.Matrix(sizingMethod='auto expand')";
window.setTimeout("rotate()",100);
}
var imageToRotate;
var degreeToRotate=0;
function rotate(){
var deg2radians = Math.PI * 2 / 360;
degreeToRotate++;
degreeToRotate=degreeToRotate%360;
rad = degreeToRotate * deg2radians ;
costheta = Math.cos(rad);
sintheta = Math.sin(rad);
imageToRotate.filters.item(0).M11 = costheta;
imageToRotate.filters.item(0).M12 = -sintheta;
imageToRotate.filters.item(0).M21 = sintheta;
imageToRotate.filters.item(0).M22 = costheta;
window.setTimeout("rotate()",100);
}
</script>
</head>
<body onload="rotateImage();">
<br />
<canvas id="canvas" width="800" height="600">
<img id="imgRotate" src="http://www.baidu.com/img/logo-yy.gif" />
</canvas>
</body>
</html>
updatepanel会导入很多js代码,影响页面加载进度