1.AjaxFileUpload
地址：
下载：
js:
Html:
后台：
public void AjaxSave() { var file = Request.Files[0]; string path = Server.MapPath("~") + "/Upfiles/" + "/"; if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } file.SaveAs(path + Path.GetFileName(file.FileName));} 2.Ajax文件上传
1.Index视图中添加一个上传控件，请求文件列表的js。
文件列表@using (Html.BeginForm("Upload", "Home", FormMethod.Post, htmlAttributes: new { enctype = "multipart/form-data", target = "msgframe" })) { }
2.控制器
public class HomeController : Controller { //Index public ViewResult Index() { return View(); } //上传 public ActionResult Upload() { //获取文件 var file = Request.Files["fileToUpload"]; string msg = ""; //保存 if (file != null && file.ContentLength > 0) { //文件目录 string path = Server.MapPath("~") + "Upfiles\\"; if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } //文件类型验证 string[] allowExtension = { "application/x-bmp" ,"image/jpeg", "application/x-jpg", "image/gif", "application/x-png", "application/msword","applications-powerpoint", "application/x-ppt", "application/-excel", "application/x-xls","application/vnd.ms-excel" }; if (!allowExtension.Contains(file.ContentType)) { msg = "上传文件类型不正确"; } else { //上传文件大小验证 long len = GetDirectoryLength(path) + file.ContentLength; if (len <= 10 * 1024 * 1024) { string directoryName = path + "\\" + file.FileName; file.SaveAs(directoryName);//文件 } else { msg = "每个借款项目的文件不能超过10M"; } } } else { msg = "添加文件失败"; } if (!string.IsNullOrEmpty(msg)) { Response.Write(""); } Response.Write(""); return View(); } //判断目录下文件的总大小 private long GetDirectoryLength(string dirPath) { long len = 0; DirectoryInfo di = new DirectoryInfo(dirPath); foreach (FileInfo fi in di.GetFiles()) { len += fi.Length; } foreach (DirectoryInfo dis in di.GetDirectories()) { len += GetDirectoryLength(dis.FullName); } return len; } //文件列表 public ActionResult FileList() { return PartialView(); } } 3.Upload视图
@{ Layout = null;} Upload 补充：
string strReturn =@""; context.Response.ContentType = "text/html"; context.Response.Write(strReturn.Replace("@msg", msg));
3.选中文件即上传
function upload() { $("#fileToUpload").click(); setTimeout("checkFile()", 1000); } var timeout; function checkFile() { var filePath = $("#fileToUpload").val(); if (filePath == "" || filePath == null) { timeout = setTimeout("checkFile()", 1000); } else { clearTimeout(timeout); $("#formUpload").submit(); $("#fileToUpload").val(""); } }
Request.File文件大小限制
错误消息：超过了最大请求长度
错误原因：asp.net默认最大上传文件大小为4M,运行超时时间为90S。
解决方案：
1. 修改web.config文件可以改变这个默认值
<configuration>
<system.web>
<httpRuntime maxRequestLength="1048576" executionTimeout="3600" />
</system.web>
<configuration>
2.另一种方法是修改.NET FrameWork:
(1) 修改 C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/CONFIG 目录下的machine.config 文件。
(2) 查找 "<httpruntime" 在这一行将 maxRequestLength的值改为理想的值，比如想要8M，就输入8192.
这样，你的任何一个 web 工程都可以上传最大8M的文件。
3.顺便说下IIS中限制上传文件大小的修改方法：
(1)首先要到进程中把IIS服务关了，即把inetinfo.exe进程关了。
(2)在系统目录中找到：windows/system32/inesrv/metabase.xml”文件，找个文本编辑器打开，查找AspMaxRequestEntityAllowed="204800"这一项，这就是iis上传文件的默认大小了，默认为204800Byte，也就是200KB，将它改为需要的大小就可以了。
备注：
在页面结构里，我们需要给一个input用来上传文件： <input type="file" id="File"> 则在支持FileReader的浏览器里就可以这样写： document.getElementById("File").addEventListener("change", readFile, false); 这是在监听input的change事件，一旦选择了文件，触发了change事件，即刻调用readFile方法。
FormData
//上传图片触发事件 function company_Logo() { var rows = $("#company_dg").datagrid("getChecked"); if (rows.length < 1) { $.show_warning("提示", "请先勾选记录"); return; } $("#logoImage").click(); }
document.getElementById("logoImage").addEventListener("change", function () { var rows = $("#company_dg").datagrid("getChecked"); var id = rows[0].Id; var formdata = new FormData(); formdata.append('logoImage', $('#logoImage')[0].files[0]); formdata.append('Id', id); $.ajax({ type: "post", url: "/Company/LogoImage", data: formdata, processData: false, contentType: false, async: true, cache: false, success: function (data) { var result = eval('(' + data + ')'); if (result.Success == "true") { $.show_warning("提示", result.Message); company_databind(); } else { $.show_warning("提示", result.Message); } }, error: function () { } }); });
public string LogoImage()//设置头像 { ResponseMessage responseMessage = new ResponseMessage(); Company originCompany = _companyRepository.GetSingle(Request["Id"]); try { var file = Request.Files["logoImage"]; //保存 if (file != null && file.ContentLength > 0 && file.ContentLength <= 2 * 1024 * 1024) { string[] strs = file.FileName.Split('.'); string fileType = strs[strs.Length - 1]; string fileName = string.Format("{0:yyyyMMddhhmmssfff}", DateTime.Now) + "." + fileType; string path = Server.MapPath("~") + "Upfiles\\Logo\\" + fileName; if (System.IO.File.Exists(path)) System.IO.File.Delete(path); file.SaveAs(path); FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.Read); Byte[] byteData = new Byte[fileStream.Length]; fileStream.Read(byteData, 0, byteData.Length); fileStream.Close(); originCompany.Logo = "/Upfiles/Logo/" + fileName; _companyRepository.Update(originCompany); responseMessage.Message = "/Upfiles/Logo/" + fileName; responseMessage.Success = "true"; return JSON.Instance.ToJSON(responseMessage, JSONConfig.GetJSONParameters()); } else { if (file != null && file.ContentLength > 2 * 1024 * 1024) { responseMessage.Message = "Logo大小不能超过2M!"; responseMessage.Success = "false"; return JSON.Instance.ToJSON(responseMessage, JSONConfig.GetJSONParameters()); } else { responseMessage.Message = "上传失败"; responseMessage.Success = "false"; return JSON.Instance.ToJSON(responseMessage, JSONConfig.GetJSONParameters()); } } } catch (Exception ex) { responseMessage.Message = "上传失败!"; responseMessage.Success = "false"; return JSON.Instance.ToJSON(responseMessage, JSONConfig.GetJSONParameters()); } }