MVC 上传 下载

【上传】带进度条

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注：添加easyui的js文件

<script type="text/javascript">
function fileSelected() {
var file = document.getElementById('fileToUpload').files[0];
var fileName = file.name;
var file_typename = fileName.substring(fileName.lastIndexOf('.'), fileName.length);

if (file_typename == '.doc' || file_typename == '.docx') {//这里限定上传文件文件类型
if (file) {

$("#uploadFile").show();
var fileSize = 0;
if (file.size > 1024 * 1024)
fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';
else
fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';
document.getElementById('fileName').innerHTML = '文件名: ' + file.name;
document.getElementById('fileSize').innerHTML = '大小: ' + fileSize;
document.getElementById('fileType').innerHTML = '类型: ' + file.type;
}
}
else {
$("#uploadFile").hide();
document.getElementById('fileName').innerHTML = "<span style='color:Red'>错误提示:上传文件应该是.doc后缀而不应该是" + file_typename + ",请重新选择文件</span>"
document.getElementById('fileSize').innerHTML = "";
document.getElementById('fileType').innerHTML = "";

}
}

function uploadFile() {
var fd = new FormData();
fd.append("fileToUpload", document.getElementById('fileToUpload').files[0]);
var XMLHttp = null;
if (window.XMLHttpRequest) { //测试 window.XMLHttpRequest 对象是否可用
var xhr = new XMLHttpRequest(); //创建一个新对象
xhr.upload.addEventListener("progress", uploadProgress, false);
//监听事件
xhr.addEventListener("load", uploadComplete, false);
xhr.addEventListener("error", uploadFailed, false);
xhr.addEventListener("abort", uploadCanceled, false);
xhr.open("POST", "/Manage/Upload");
xhr.send(fd);
} else if (window.ActiveXObject) {
var xhr = new ActiveXObject("Microsoft.XMLHTTP");

xhr.upload.addEventListener("progress", uploadProgress, false);

xhr.addEventListener("load", uploadComplete, false);
xhr.addEventListener("error", uploadFailed, false);
xhr.addEventListener("abort", uploadCanceled, false);
xhr.open("POST", "/Manage/Upload");
xhr.send(fd);
}
}

//上传进度
function uploadProgress(evt) {
if (evt.lengthComputable) {
var percentComplete = Math.round(evt.loaded * 100 / evt.total);
$('#progressNumber').progressbar('setValue', percentComplete);
}
else {
document.getElementById('progressNumber').innerHTML = '无法计算';
}
}

//上传成功响应
function uploadComplete(evt) {
var message = evt.target.responseText;
alert(message);
}

//上传失败
function uploadFailed(evt) {
alert("上传出错");
}

//取消上传
function uploadCanceled(evt) {
alert("上传已由用户或浏览器取消删除连接");
}
</script>

@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
<div>
<div class="row" style="padding: 10px">
<div>
论文题目：
<input class="easyui-validatebox easyui-textbox" data-options="required:true" name="Re_Title"
id="Re_Title" style=" 250px" />
</div>
<label for="file">
论文内容：
</label>
<input type="file" name="fileToUpload" id="fileToUpload" multiple="multiple" onchange="fileSelected();" />
<a id="uploadFile" style="display: none" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-save'"
onclick="uploadFile()">上传</a>
</div>
<div id="fileName" style="padding: 10px">
</div>
<div id="fileSize" style="padding: 10px">
</div>
<div id="fileType" style="padding: 10px">
</div>
<div id="progressNumber" class="easyui-progressbar" style=" 400px; float: left;
margin-left: 10px;">
</div>
<div style="padding: 95px">
<input id="submit" type="submit" value="保存" class="bottom" />
<input id="reset" type="reset" value="取消" class="bottom" />
</div>
</div>
}

控制器 Controller.cs

/// <summary>
/// 上传文件
/// </summary>
/// <param name="fileToUpload"></param>
/// <returns></returns>
[HttpPost]
[ValidateInput(false)]
public string Upload(HttpPostedFileBase[] fileToUpload)
{
try
{
string FileUrl = string.Empty;
foreach (HttpPostedFileBase file in fileToUpload)
{
string path = System.IO.Path.Combine(Server.MapPath("~/FileUpLoad/Reviews"), System.IO.Path.GetFileName(file.FileName));
file.SaveAs(path);
FileUrl = path;
}
Session["URL"] = FileUrl;
return "上传成功";
}
catch
{
return "上传失败";
}

}

【下载】

view 

<a href="/Manage/DownFile?filePath=@Model.Re_Content&fileName=@Model.Re_Title">@Model.Re_Title</a>

controller.cs

#region ReviewDownFile
//本地路径转换成URL相对路径
private string urlconvertor(string imagesurl1)
{
string tmpRootDir = Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
string imagesurl2 = imagesurl1.Replace(tmpRootDir, ""); //转换成相对路径
imagesurl2 = imagesurl2.Replace(@"", @"/");
return imagesurl2;
}

//下载方法
[HttpGet]
public FileStreamResult DownFile(string filePath, string fileName)
{
var url = filePath;
var newurl = urlconvertor(url);
string absoluFilePath = Server.MapPath(System.Configuration.ConfigurationManager.AppSettings["AttachmentPath"] + newurl);
absoluFilePath = absoluFilePath.Replace("\Manage", "");
return File(new FileStream(absoluFilePath, FileMode.Open), "application/octet-stream", Server.UrlEncode(fileName));
}
#endregion