基本信息
源码名称：asp.net 上传文件
源码大小：0.43M
文件格式：.rar
开发语言：C#
更新时间：2015-06-18
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   源码介绍 


<%@ Page Language="C#" EnableSessionState="ReadOnly" Async="true" %>
<%@ Import Namespace="System.IO"  %>

<!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>Untitled Page</title>
    <script runat="server">
        //限制大小 1M
        protected void Page_Load2(object sender, EventArgs e)
        {
            if (this.IsPostBack)
            {
                UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo;
                if (uploadInfo == null)
                {
                    // 让父页面知道无法处理上传
                    const string js = "window.parent.onComplete('error', '无法上传文件。请刷新页面，然后再试一次);";
                    ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
                }
                else
                {
                    //  让服务端知道我们还没有准备好..
                    uploadInfo.IsReady = false;

                    //  上传验证
                    if (this.fileUpload.PostedFile != null && this.fileUpload.PostedFile.ContentLength > 0

                        && this.fileUpload.PostedFile.ContentLength < 1048576)//  限制1M
                    {
                        //  设置路径
                        string path = this.Server.MapPath(@"Uploads");
                        string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName);

                        // 上传信息
                        uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength;
                        uploadInfo.FileName = fileName;
                        uploadInfo.UploadedLength = 0;

                       //文件存在 初始化...
                        uploadInfo.IsReady = true;

                       //缓存
                        int bufferSize = 1;
                        byte[] buffer = new byte[bufferSize];

                        // 保存字节
                        using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create))
                        {                         
                            while (uploadInfo.UploadedLength < uploadInfo.ContentLength)
                            {
                               //从输入流放进缓冲区
                                int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize);
                                // 字节写入文件流
                                fs.Write(buffer, 0, bytes);
                                //  更新大小
                                uploadInfo.UploadedLength  = bytes;

                                //  线程睡眠 上传就更慢 这样就可以看到进度条了
                                System.Threading.Thread.Sleep(100);
                            }
                        }

                        // 删除.
                        File.Delete(Path.Combine(path, fileName));

                        //   让父页面知道已经处理上传完毕
                        const string js = "window.parent.onComplete('success', '{0} 已成功上传');";
                        ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true);
                    }
                    else
                    {
                        if (this.fileUpload.PostedFile.ContentLength >= 1048576)//1M
                        {
                            const string js = "window.parent.onComplete('error', '超出上传文件限制大小，请重新选择');";
                            ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
                        }
                        else
                        {
                            const string js = "window.parent.onComplete('error', '上传文件出错');";
                            ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
                        }
                    }                  
                    uploadInfo.IsReady = false;
                }
            }        
        }

        // 不限制大小
        protected void Page_Load(object sender, EventArgs e)
        {
            if (this.IsPostBack)
            {
                UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo;             
                uploadInfo.IsReady = false;               
                if (this.fileUpload.PostedFile != null && this.fileUpload.PostedFile.ContentLength > 0)
                {               
                    string path = this.Server.MapPath(@"Uploads");
                    string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName);
                   
                    uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength;
                    uploadInfo.FileName = fileName;
                    uploadInfo.UploadedLength = 0;
                    
                    uploadInfo.IsReady = true;

                    int bufferSize = 1;
                    byte[] buffer = new byte[bufferSize];

                    using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create))
                    {
                        while (uploadInfo.UploadedLength < uploadInfo.ContentLength)
                        {
                            int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize);                          
                            fs.Write(buffer, 0, bytes);                         
                            uploadInfo.UploadedLength  = bytes;
                        }
                    }
                    const string js = "window.parent.onComplete('success', '{0} 已成功上传');";
                    ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true);
                }
                else
                {
                    const string js = "window.parent.onComplete('error', '上传文件出错');";
                    ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
                }
                uploadInfo.IsReady = false;
            }
        }        
    </script>
    <style type="text/css">
        BODY{margin:0; padding:0; background-color:#F0F8FF;}
    </style>
</head>
<body>
    <form id="form" runat="server" enctype="multipart/form-data">
    <asp:ScriptManager ID="scriptManager" runat="server" />
    <script type="text/javascript">
        function pageLoad(sender, args){               
            window.parent.register(
                $get('<%= this.form.ClientID %>'), 
                $get('<%= this.fileUpload.ClientID %>')
            );
        }
    </script>
    <div>
        <asp:FileUpload ID="fileUpload" runat="server" Width="100%" />
    </div>
    </form>
</body>
</html>