.NET中的FileUpload控件的使用-Jquery(一)

Serves as the base class for classes that provide access to individual files that have been uploaded by a client.

用于提供客户端上传的单个文件访问的类的基类

 

接下来看看如何实现：

  <div class="container">
        <div class="row">
            <input type="file" id="files" multiple name="files" /><button class="btn-default" id="UploadButton">点我上传</button>
        </div>
    </div>

 $(function () {
            $(‘#UploadButton‘).click(function () {
              var data= new FormData();
                var fileUpload = $("#files").get(0);
                files = fileUpload.files;
                if (files.length > 0) {
                    for (var i = 0; i < files.length; i++) {
                        data.append(files[i].name, files[i]); //FormData 是以键值对的形式模拟表单，然后以XMLHttpRequest请求出去。表单的enctype的属性为multipart/form-data 
                    }
                    $.ajax({
                        url: ‘/IENotes/CommonFile,
                        type: "POST", 
                        processData: false,   //  不序列化，直接将data进行传输。
                        contentType: false,    // 告诉jquery不要设置content-Type请求头，设置成true会对FormData的边界造成干扰，接收不到数据。
                        data: data,
                        success: function (result) {
                            //location.href("Index");
                            alert(result);
                        },
                        error: function (err) {
                            alert(err.statusText);
                        }
                    });
                }
            });
        });

 后台

public static bool CommonFile(){

 var  files = Request.Files.AllKeys.Distinct(); //将传输过来的files进行去重
                if (files != null)
                {
                    foreach (string each in files)
                    {
                        HttpPostedFileBase file = Request.Files[each] as HttpPostedFileBase; //注意，这里有一个对象类型转换的过程，需要将传过来的对象转换成HttpPostedFileBase对象
                        if (file != null)
                        {
                            var InputFileName = Path.GetFileName(file.FileName);
                            string str4 = AppDomain.CurrentDomain.BaseDirectory;    //获取基目录，它由程序集冲突解决程序用来探测程序集。

                            var ServerSavePath = Path.Combine(Server.MapPath("~/Uploads/") );
                            if (!Directory.Exists(ServerSavePath))//检查路径是否存在
                            {
                                Directory.CreateDirectory(ServerSavePath);
                            }
                            var SavePath = Path.Combine(ServerSavePath ,InputFileName);

                            file.SaveAs(SavePath);
                        }

                    }
                    return true;
                }
                else
                {
                    return false;
                }

}