Asp.net关于上传文件的进度条问题

用ajax写吧...具体的我没写过.

最简单的想用个div+gif来显示，但是这个也不懂，也不会写有例子否？

swfupload asp.nethttp://www.codefans.net/soft/7914.shtml

简单的就是DIV+GIF向这样    <div id="loading" style="position:absolute;width:100%;height:100%;
left:0px;top:0px;background-color:#ffffff;filter:alpha
(opacity=95);display:none;">
    <div style="text-align:center;padding-top:200px">
数据预计需要3到5分钟的加载时间，请勿关闭窗口及刷新页面，请稍后........
<br />
<br />
<img src="../images/waitting.gif" />
    </div>
    </div>
上面那段代码要放在<body>标记下面，也就是等加载页面的时候。

function divstyle()
    {
        document.getElementById("loading").style.display = 'block';
    }
少了一个JS，

http://swfupload.org/sites/swfupload.org/files/swfupload_vr5.2.applicationdemo.asp.net.2.0.zip

刚好看了一篇帖子，上传带进度条的
http://topic.csdn.net/u/20100228/19/e7f49404-9e81-461a-8be1-e7040778a802.html?10858

前台:
<script type="text/javascript">
        var xmlHttp;

        function upload()
        {
            var imgload=document.getElementById("file").value;
            xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
            xmlHttp.onreadystatechange=call;
            xmlHttp.open("get","FileUpload.aspx?file="+encodeURIComponent(imgload),true);
            xmlHttp.send();
        }

        function call()
        {
            if(xmlHttp.readyState == 4&&xmlHttp.status==200) {
                if(xmlHttp.responseText=="OK")
                {
                      document.getElementById("img").src="";
                }
            }
        }

    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="file" type="file" />
        <input id="btnUp" type="button" value="上传" onclick="upload();" />
        <img id="img" src="image/arrow.gif" />
    </div>
    </form>
</body>后台:
if (Request["file"] != null)
                {
                    string imgload = Request["file"];
                    string fileName = imgload.Substring(imgload.LastIndexOf('\\')+1);
                    string fileStream = Server.MapPath("~/image/"+fileName);
                    WebClient myWebClient = new WebClient();
                    myWebClient.Credentials = CredentialCache.DefaultCredentials;
                    FileStream fs = new FileStream(Request["file"], FileMode.Open, FileAccess.Read);
                    BinaryReader r = new BinaryReader(fs);
                    myWebClient.UploadFile(fileStream, Request["file"]);
                    Response.Write("OK");
                    Response.Flush();
                    Response.End();
                }写的不好,不要见笑

弄一个DIV 假的就可以啦，
看看行不

default.aspx<%@ Page Language="C#" %>
<%@ Register Assembly="MattBerseth.WebControls.AJAX" Namespace="MattBerseth.WebControls.AJAX.Progress" TagPrefix="mb" %><!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>
    <link rel="Stylesheet" href="_assets/css/progress.css" />
    <link rel="Stylesheet" href="_assets/css/upload.css" />
    <style type="text/css">
        BODY{ font-family:Arial, Sans-Serif; font-size:12px;}
    </style>
    <script type="text/C#" runat="server">

        protected void Page_Load(object sender, EventArgs args)
        {
            if (!this.IsPostBack)
            {
                this.Session["UploadInfo"] = new UploadInfo { IsReady = false };
            }
        }

        /// <summary>
        ///
        /// </summary>
        [System.Web.Services.WebMethod]
        [System.Web.Script.Services.ScriptMethod]
        public static object GetUploadStatus()
        {
            //获取文件长度
            UploadInfo info = HttpContext.Current.Session["UploadInfo"] as UploadInfo;            if (info != null && info.IsReady)
            {
                int soFar = info.UploadedLength;
                int total = info.ContentLength;                int percentComplete = (int)Math.Ceiling((double)soFar / (double)total * 100);
                string message = string.Format("上传 {0} ... {1} of {2} 字节", info.FileName, soFar, total);

                //  返回百分比
                return new { percentComplete = percentComplete, message = message };
            }            //  还没有准备好...
            return null;
        }

    </script>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="scriptManager" runat="server" EnablePageMethods="true" />

    <script type="text/javascript">
        var intervalID = 0;
        var progressBar;
        var fileUpload;
        var form;
        // 进度条
        function pageLoad(){
            $addHandler($get('upload'), 'click', onUploadClick);
            progressBar = $find('progress');
        }
        // 注册表单
        function register(form, fileUpload){
            this.form = form;
            this.fileUpload = fileUpload;
        }
        //上传验证
        function onUploadClick() {
            var vaild = fileUpload.value.length > 0;
            if(vaild){
                $get('upload').disabled = 'disabled';
                updateMessage('info', '初始化上传...');
                //提交上传
                form.submit();
                // 隐藏frame
                Sys.UI.DomElement.addCssClass($get('uploadFrame'), 'hidden');
                // 0开始显示进度条
                progressBar.set_percentage(0);
                progressBar.show();
                // 上传过程
                intervalID = window.setInterval(function(){
                    PageMethods.GetUploadStatus(function(result){
                        if(result){
                            //  更新进度条为新值
                            progressBar.set_percentage(result.percentComplete);
                            //更新信息
                            updateMessage('info', result.message);

                            if(result == 100){
                                // 自动消失
                                window.clearInterval(intervalID);
                            }
                        }
                    });
                }, 500);
            }
            else{
                onComplete('error', '您必需选择一个文件');
            }
        }

        function onComplete(type, msg){
            // 自动消失
            window.clearInterval(intervalID);
            // 显示消息
            updateMessage(type, msg);
            // 隐藏进度条
            progressBar.hide();
            progressBar.set_percentage(0);
            // 重新启用按钮
            $get('upload').disabled = '';
            //  显示frame
            Sys.UI.DomElement.removeCssClass($get('uploadFrame'), 'hidden');
        }
        function updateMessage(type, value){
            var status = $get('status');
            status.innerHTML = value;
            // 移除样式
            status.className = '';
            Sys.UI.DomElement.addCssClass(status, type);
        }

    </script>

    <div>
        <div class="upload">
            <h3>文件上传</h3>
            <div>
                <iframe id="uploadFrame" frameborder="0" scrolling="no" src="Upload.aspx"></iframe>
                <mb:ProgressControl ID="progress" runat="server" CssClass="lightblue" style="display:none" Value="0" Mode="Manual" Speed=".4" Width="100%" />
                <div>
                    <div id="status" class="info">请选择要上传的文件</div>
                    <div class="commands">
                        <input id="upload" type="button" value="上传" />
                    </div>
                </div>
            </div>
        </div>

    </div>
    </form>
</body>
</html>

upload.aspx<%@ 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>

this.fileUpload.PostedFile.ContentLength 为上传文件的总长度int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize);
UploadedLength += bytes;
UploadedLength为已上传的长度如下的事情就是怎么表现了

看下我的博客，关于jquery上传文件的带进度条的：
http://www.cnblogs.com/chenping-987123/archive/2010/09/25/1834372.html

“<%@ Register Assembly="MattBerseth.WebControls.AJAX" Namespace="MattBerseth.WebControls.AJAX.Progress" TagPrefix="mb" %>”这个是哪里的什么东西啊？

调试易

Asp.net关于上传文件的进度条问题

解决方案 »