MVC上传文件

1、首先需要定义页面标签

<form id="fileUploadForm" method="post" enctype="multipart/form-data">

</form>

2、定义JQuery方法

function file_onChange(srcElement) {
 $("#fileUploadForm").ajaxSubmit({
  type: 'post',
  url: "/require/UpLoadFiless",
  data: { Upload_req00_no: $("#Upload_req00_no").val() },
  success: function (result) {
    //上传完成后的操作
   if (result != "") {
    result = eval("(" + result + ")");
    var filenamestr = result.fileName + "." + result.fileExtension;
    var obj = $("#div_upload_info", parent.document)
    $(obj).append("<span class='tagstyle'><input  type='hidden' name='fileExtension' value=" + result.fileExtension + "><input  type='hidden' name='fileName' value=" + result.fileName + "><input  type='hidden' name='fileSize' value=" + result.fileSize + "><a href='#' onclick='DownloadFiles(this,"" + filenamestr + "","" + $("#Upload_req00_no").val() + "")'>" + result.fileName + "." + result.fileExtension + "</a><a class='ico-href' href='#'><i class='icon-remove' onclick=removeTag(this)></i></a></span>");
   }
  },
  error: function (XmlHttpRequest, textStatus, errorThrown) {
   alert("error");
  }
 });

3、控制器中的操作

HttpPostedFileBase uploadFile = Request.Files["file"];
if (Request.Files.Count > 0)
    {
     if (uploadFile != null)
     {
      byte[] lByteArray;
      MemoryStream lMemoryStream = new MemoryStream();
　　　//将文件流拷贝到内存流中
      uploadFile.InputStream.CopyTo(lMemoryStream);
      lByteArray = lMemoryStream.ToArray();
      path = string.Empty;
      path = Upload_req00_no;
　　　//获取文件后缀
      fileExtension = uploadFile.FileName.Substring(uploadFile.FileName.LastIndexOf('.') + 1);
　　　//获取文件名称
      fileName = uploadFile.FileName.Substring(0, uploadFile.FileName.LastIndexOf('.'));
      UpLoadFileModel fModel = new UpLoadFileModel();
　　　 //文件大小
      fileSize = uploadFile.ContentLength;
　　　 //自定义的API服务来保存文件
      base.ExecAPIService(EnumAppSettingAPIKey.APIMELMRPAttachFileUploadEventURL,
          fModel.GetAPIUploadEntity(path, fileName, fileExtension),
          lByteArray);
     }