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zjp888 2003-11-06
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下面的代码是限制上传图片的长度.与你想要得到上传图的的大小差不多.
在后台程序中picshow.Height 就是图片的高,picshow.Width 图片的的宽
<HTML>
<HEAD>
<title>Upload Image</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</HEAD>
<body bgcolor="#ffffff" text="#000000">
<form name="IUpload" action="upfile.asp" method="post">
<p><input type="file" name="picsrc" size="40" onchange="picshow.src=document.IUpload.picsrc.value">
<input type="button" value="上载" onclick="detect()"></p>
</form>
<p></p>
<asp:Image ID="picshow" Runat="server" name="picshow" ></asp:Image>
<SCRIPT LANGUAGE="JavaScript">
<!--
function imgExceedSize(w,h){
if(!document.IUpload.picsrc.value==""){
if(picshow.width>w||picshow.height>h){
alert("图像尺寸："+picshow.width+"X"+picshow.height+"。\\n图像尺寸过大！你只能上传尺寸为 "+w+"×"+h+"的图像，请重新浏览图片！");
return true;
}else{
return false;
}
}else{
return true;
}
}
function detect(){
var ok=imgExceedSize(50,50);
if(ok){
document.IUpload.reset();
}else{
document.IUpload.submit();
}
}
//-->
</SCRIPT>
</body>
</HTML>
在后台程序中picshow.Height 就是图片的高,picshow.Width 图片的的宽
<HTML>
<HEAD>
<title>Upload Image</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</HEAD>
<body bgcolor="#ffffff" text="#000000">
<form name="IUpload" action="upfile.asp" method="post">
<p><input type="file" name="picsrc" size="40" onchange="picshow.src=document.IUpload.picsrc.value">
<input type="button" value="上载" onclick="detect()"></p>
</form>
<p></p>
<asp:Image ID="picshow" Runat="server" name="picshow" ></asp:Image>
<SCRIPT LANGUAGE="JavaScript">
<!--
function imgExceedSize(w,h){
if(!document.IUpload.picsrc.value==""){
if(picshow.width>w||picshow.height>h){
alert("图像尺寸："+picshow.width+"X"+picshow.height+"。\\n图像尺寸过大！你只能上传尺寸为 "+w+"×"+h+"的图像，请重新浏览图片！");
return true;
}else{
return false;
}
}else{
return true;
}
}
function detect(){
var ok=imgExceedSize(50,50);
if(ok){
document.IUpload.reset();
}else{
document.IUpload.submit();
}
}
//-->
</SCRIPT>
</body>
</HTML>
laomusan 2003-11-06
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刚才acewang(**^o^**) 的代码只能得到大小,而无法得到图片的尺寸
myzig 2003-11-06
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一样的
laomusan 2003-11-06
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可能我没说清楚,我要图片的尺寸,而不是它的大小
Abac 2003-11-06
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vb的跟C#的没有区别，用的都是FileInfo 对象
laomusan 2003-11-06
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有知道的么?
laomusan 2003-11-06
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图片尺寸的大小
laomusan 2003-11-06
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谢了,有vb的吗?
redlion963 2003-11-06
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是获的图片尺寸的大小，还是文件的大小
acewang 2003-11-06
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用FileInfo.Length
string dirName = "C:\\";
DirectoryInfo dirInfo = new DirectoryInfo(dirName);
Console.WriteLine("{0} contains the following files:", dirName);
Console.WriteLine("Size\t Filename");
foreach (FileInfo fileInfo in dirInfo.GetFiles()) {
try {
Console.WriteLine("{0}\t {1}",
fileInfo.Length, fileInfo.Name);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}
catch (IOException e) {
Console.WriteLine("\t {0}: {1}", fileInfo.Name, e.Message);
}
}
string dirName = "C:\\";
DirectoryInfo dirInfo = new DirectoryInfo(dirName);
Console.WriteLine("{0} contains the following files:", dirName);
Console.WriteLine("Size\t Filename");
foreach (FileInfo fileInfo in dirInfo.GetFiles()) {
try {
Console.WriteLine("{0}\t {1}",
fileInfo.Length, fileInfo.Name);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}
catch (IOException e) {
Console.WriteLine("\t {0}: {1}", fileInfo.Name, e.Message);
}
}
