日期:2014-05-18 浏览次数:20418 次
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Articles_Default2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>无标题页</title> <script type="text/javascript" language="javascript"> function CheckFileType() { var objButton=document.getElementById("Button1");//上传按钮 var objFileUpload=document.getElementById('FileUpload1');//FileUpload var objMSG=document.getElementById('msg');//显示提示信息用的DIV var FileName=new String(objFileUpload.value);//文件名 var extension=new String (FileName.substring(FileName.lastIndexOf(".")+1,FileName.length));//文件扩展名 if(extension=="jpg"||extension=="JPG")//你可以添加扩展名 { objButton.disabled=false;//启用上传按钮 objMSG.innerHTML=""; } else { objButton.disabled=true;//禁用上传按钮 objMSG.innerHTML="请选择正确的文件文件"; } } </script> </head> <body> <form id="form1" runat="server"> <div> <div id="msg"></div> <asp:Button ID="Button1" runat="server" Text="上传" Enabled="False" /> <br /> <asp:FileUpload ID="FileUpload1" runat="server" onChange="javascript:CheckFileType();" /> </div> </form> </body> </html>
------解决方案--------------------
大小用JS好像不太好验证吧?只有到后台去验证。
还有,前台验证过之后,到后台也要验证下。
------解决方案--------------------
刚刚找了一个客户端代码,我没验证,你看看行不?
参考:http://www.cnblogs.com/nina-piaoye/archive/2007/10/19/930741.html
JS 客户端验证文件类型,获取图片信息:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>JS 文件大小及类型判断</title> <style> *{}{ font-size:12px;} </style> <script language="javascript"> <!-- function ShowInfo(sUrl) { var FSO,F,Ext; var Extlist = ".gif.jpg.bmp"; //FSO = new ActiveXObject("Scripting.FileSystemObject"); //F = FSO.GetFile(sUrl); Ext = GetExt(sUrl); if(Extlist.indexOf(Ext)==-1) document.getElementById("Info").innerHTML = "扩展名:" + Ext + " 不是图片类型! 原始路径:" + sUrl; else{ document.getElementById("imgs").src = ""; document.getElementById("imgs").alt = "图片加载中……"; document.getElementById("imgs").src = sUrl; var MyImage = new Image(); MyImage.src = sUrl; document.getElementById("Info").innerHTML = "扩展名:" + Ext + " 合法图片类型! 原始路径:" + sUrl + "<br /> 文件大小:" + MyImage.fileSize + " Bytes 尺寸:" + MyImage.width + "*" + MyImage.height; } } function GetExt(sUrl) { var arrList = sUrl.split(".&qu