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简单的图片批量上传.net

Posted on 2011-01-15 09:22  lializ  阅读(220)  评论(0)    收藏  举报

.aspx部分：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>

<!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 id="Head1" runat="server">
    <title>多文件上传</title>

    <script language="JavaScript">

    function addFile()

    {

     var str = '<INPUT type="file" size="50" NAME="File">'

     document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)

    }

    </script>

    <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>

</head>
<body>
    <form id="form1" runat="server">
    <div align="center">
        <h3>
            多文件上传</h3>
        <p>
            <input id="HIF" type="file" runat="server" onchange="CheckImgCss(this, 'img');" />&nbsp;</p>
        <p>
            <asp:ListBox ID="FileList" runat="server" Width="201px"></asp:ListBox>
            &nbsp;</p>
        <p>
            <asp:Button ID="AddFile" runat="server" Text="添加文件" OnClick="AddFile_Click" />
            <asp:Button ID="RemvFile" runat="server" Text="删除文件" OnClick="RemvFile_Click" />
            <input id="Uploads" type="submit" value="上传" runat="server" onserverclick="Uploads_ServerClick" />
        </p>
        <p>
            <asp:Label ID="TipInfo" runat="server"></asp:Label>&nbsp;</p>
        <div id="img" style="filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src=<%= pic%>,sizingMethod=scale);
            width: 102px; height: 100px;">
        </div>
    </div>
    </form>
</body>
</html>
-------------------------------------------------------------------------------------------

.cs部分：

 public string pic = "http://www.svnhost.cn/images/logo.gif";
    static public ArrayList hif = new ArrayList(); // 保存文件列表

    public int filesUploaded = 0; // 上传文件的数量

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    /// <summary>
    /// 将要上传的文件添加到listbox中
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void AddFile_Click(object sender, EventArgs e)
    {
        if (Page.IsPostBack == true)
        {
            hif.Add(HIF);
            FileList.Items.Add(HIF.PostedFile.FileName);
        }
        else
        { }
    }

    /// <summary>
    /// 从listbox中删除指定的文件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void RemvFile_Click(object sender, EventArgs e)
    {
        if (FileList.SelectedIndex == -1)
        {
            TipInfo.Text = "错误 - 必须指定要删除的文件.";
            return;
        }
        else if (FileList.Items.Count != 0)
        {
            hif.RemoveAt(FileList.SelectedIndex);
            FileList.Items.Remove(FileList.SelectedItem.Text);
            TipInfo.Text = "";
        }
    }

    /// <summary>
    /// 循环上传listbox中的文件到指定的文件夹下
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Uploads_ServerClick(object sender, EventArgs e)
    {
        string baseLocation = Server.MapPath("Uploads/"); // 上传路径  
        string status = "";  // 上传成功后显示的文件列表        
        if ((FileList.Items.Count == 0) && (filesUploaded == 0))
        {
            TipInfo.Text = "错误 - 必须指定要上传的文件.";
            return;
        }
        else
        {
            foreach (System.Web.UI.HtmlControls.HtmlInputFile HIF in hif)
            {
                try
                {
                    string fn = System.IO.Path.GetFileName(HIF.PostedFile.FileName);
                    HIF.PostedFile.SaveAs(baseLocation + fn);
                    filesUploaded++;
                    status += fn + "<br>";
                }
                catch (Exception err)
                {
                    TipInfo.Text = "上传错误 " + baseLocation + "<br>" + err.ToString();
                }
            }
            if (filesUploaded == hif.Count)
            {
                TipInfo.Text = "共上传了 " + filesUploaded + " 个文件。 <br>" + status;
            }
            hif.Clear();
            FileList.Items.Clear();
        }
    }