<script language="javascript">
function $(o){return document.getElementById(o);}
function CheckImgCss(o,img)
{
if (!/\.((jpg)|(bmp)|(gif)|(png))$/ig.test(o.value))
{
alert('只能上传jpg,bmp,gif,png格式图片!');
o.outerHTML = o.outerHTML;
}
else
{
$(img).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src=o.value;
//$('Image1').src = o.value;//这里IE7已经不支持了。所以才有上面的方法。
}
}
</script>
<form id="form1" runat="server">
<div><h1>一次上传多个图片并预览,请选择图片:</h1>
<asp:FileUpload ID="FileUpload1" onchange="CheckImgCss(this, 'img');" runat="server" />
<asp:FileUpload ID="FileUpload2" onchange="CheckImgCss(this, 'img');" runat="server" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />
<div id="img" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=<%= pic%>,sizingMethod=scale);width:102px;height:100px;"></div>
</div>
function $(o){return document.getElementById(o);}
function CheckImgCss(o,img)
{
if (!/\.((jpg)|(bmp)|(gif)|(png))$/ig.test(o.value))
{
alert('只能上传jpg,bmp,gif,png格式图片!');
o.outerHTML = o.outerHTML;
}
else
{
$(img).filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src=o.value;
//$('Image1').src = o.value;//这里IE7已经不支持了。所以才有上面的方法。
}
}
</script>
<form id="form1" runat="server">
<div><h1>一次上传多个图片并预览,请选择图片:</h1>
<asp:FileUpload ID="FileUpload1" onchange="CheckImgCss(this, 'img');" runat="server" />
<asp:FileUpload ID="FileUpload2" onchange="CheckImgCss(this, 'img');" runat="server" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传" />
<div id="img" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=<%= pic%>,sizingMethod=scale);width:102px;height:100px;"></div>
</div>
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
namespace UploadPicture
{
public partial class _Default : System.Web.UI.Page
{
//该变量用来修改的的时候的默认值。例如上传自己的头像,如果用户修改头像,这里可以显示他原来的头像。
public string pic = "http://www.XXX.com/logo.gif";
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Random r = new Random();
//这样循环,可以同时上传多个文件。前台已经有文件格式的判断,有错误提示了。这里只要过滤掉非法文件即可,无需提示了。
for (int i = 0; i < Request.Files.Count; i++)
{
if (Request.Files[i].ContentLength > 0)
{
string ex = System.IO.Path.GetExtension(Request.Files[i].FileName).ToLower();
if (".jpg.gif.png.bmp".Contains(ex))
{
string newFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + r.Next(100, 999).ToString() + ex;
//保存文件名到数据库
//xxxxxxxxxxxxxxxx
//xxxxxxxxxxxxxxxx
Request.Files[i].SaveAs(Server.MapPath(newFileName));
pic = newFileName;
}
}
}
}
}
}
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
namespace UploadPicture
{
public partial class _Default : System.Web.UI.Page
{
//该变量用来修改的的时候的默认值。例如上传自己的头像,如果用户修改头像,这里可以显示他原来的头像。
public string pic = "http://www.XXX.com/logo.gif";
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Random r = new Random();
//这样循环,可以同时上传多个文件。前台已经有文件格式的判断,有错误提示了。这里只要过滤掉非法文件即可,无需提示了。
for (int i = 0; i < Request.Files.Count; i++)
{
if (Request.Files[i].ContentLength > 0)
{
string ex = System.IO.Path.GetExtension(Request.Files[i].FileName).ToLower();
if (".jpg.gif.png.bmp".Contains(ex))
{
string newFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + r.Next(100, 999).ToString() + ex;
//保存文件名到数据库
//xxxxxxxxxxxxxxxx
//xxxxxxxxxxxxxxxx
Request.Files[i].SaveAs(Server.MapPath(newFileName));
pic = newFileName;
}
}
}
}
}
}