MVC文件上传06-使用客户端jQuery-File-Upload插件和服务端Backload组件自定义控制器上传多个文件

当需要在控制器中处理除了文件的其他表单字段，执行控制器独有的业务逻辑......等等，这时候我们可以自定义控制器。

MVC文件上传相关兄弟篇：

MVC文件上传01-使用jquery异步上传并客户端验证类型和大小 
MVC文件上传02-使用HttpPostedFileBase上传多个文件  
MVC文件上传03-使用Request.Files上传多个文件
MVC文件上传04-使用客户端jQuery-File-Upload插件和服务端Backload组件实现多文件异步上传  
MVC文件上传05-使用客户端jQuery-File-Upload插件和服务端Backload组件自定义上传文件夹

 

  通过继承BackloadController

□ 思路

BackloadController的HandleRequestAsync()方法可以用来处理异步请求，通过继承BackloadController，子类也有了处理异步文件请求的能力。客户端方面，需要一个指向自定义控制器的初始化js文件。

□ FileUploadDerivedController继承BackloadController

    public class FileUploadDerivedController : BackloadController
    {
        public ActionResult Index()
        {
            return View();
        }

        public async Task<ActionResult> FileHandler()
        {
            ActionResult result = await base.HandleRequestAsync();
            return result;
        }
    }

□ 创建一个指向自定义控制器的js文件main.js

$(function () {
    'use strict';

    var fileUploadUrl = "/FileUploadDerived/FileHandler";

    // Initialize the jQuery File Upload widget:
    $('#fileupload').fileupload({
        url: fileUploadUrl,
        acceptFileTypes: /(jpg)|(jpeg)|(png)|(gif)$/i // Allowed file types
    });

    // Optional: Initial ajax request to load already existing files.
    $.ajax({
        url: fileUploadUrl,
        dataType: 'json',
        context: $('#fileupload')[0]
    })
    .done(function (result) {
        $(this).fileupload('option', 'done')
            .call(this, null, { result: result });
        // Attach the Colorbox plugin to the image files to preview them in a modal window. Other file types (e.g. pdf) will show up in a
        // new browser window.
        $(".files tr[data-type=image] a").colorbox();
    });


    // Initialize the jQuery ui theme switcher:
    $('#theme-switcher').change(function () {
        var theme = $('#theme');
        theme.prop(
            'href',
            theme.prop('href').replace(
                /[w-]+/jquery-ui.css/,
                $(this).val() + '/jquery-ui.css'
            )
        );
    });
});


$("document").ready(function () {
    // The Colorbox plugin needs to be informed on new uploaded files in the template in order to bind a handler to it.
    // There must be a little delay, because the fileuploaddone event is triggered before the new template item is created.
    // A more elegant solution would be to use jQuery's delegated .on method, which automatically binds to the anchors in a
    // newly created template item, and then call colorbox manually.
    $('#fileupload').bind('fileuploaddone', function(e, data) {
        setTimeout(function() { $(".files tr[data-type=image] a").colorbox() }, 1000);
    });
});

□ 其中用到了colorbox插件

install-package colorbox

□ FileUploadDerived/Index.cshtml视图

@{
    ViewBag.Title = "Index";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

    <div>
        <!-- The file upload form used as target for the file upload widget -->
        <form id="fileupload" action="/Backload/UploadHandler" method="POST" enctype="multipart/form-data">
            <!-- Redirect browsers with JavaScript disabled to the origin page -->
            <noscript><input type="hidden" name="redirect" value="/"></noscript>
            <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
            <div class="row fileupload-buttonbar">
                <div class="span7">
                    <!-- The fileinput-button span is used to style the file input field as button -->
                    <span class="btn btn-success fileinput-button">
                        <i class="icon-plus icon-white"></i>
                        <span>添加文件...</span>
                        <input type="file" name="files[]" multiple>
                    </span>
                    <button type="submit" class="btn btn-primary start">
                        <i class="icon-upload icon-white"></i>
                        <span>开始上传</span>
                    </button>
                    <button type="reset" class="btn btn-warning cancel">
                        <i class="icon-ban-circle icon-white"></i>
                        <span>取消上传</span>
                    </button>
                    <button type="button" class="btn btn-danger delete">
                        <i class="icon-trash icon-white"></i>
                        <span>删除</span>
                    </button>
                    <input type="checkbox" class="toggle">
                    <!-- The loading indicator is shown during file processing -->
                    <span class="fileupload-loading"></span>
                </div>
                <!-- The global progress information -->
                <div class="span5 fileupload-progress fade">
                    <!-- The global progress bar -->
                    <div class="progress progress-success progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
                        <div class="bar" style="0%;"></div>
                    </div>
                    <!-- The extended global progress information -->
                    <div class="progress-extended">&nbsp;</div>
                </div>
            </div>
            <!-- The table listing the files available for upload/download -->
            <table role="presentation" class="table table-striped"><tbody class="files" data-toggle="modal-gallery" data-target="#modal-gallery"></tbody></table>
        </form>  

        <!-- The template to display files available for upload -->
        <script id="template-upload" type="text/x-tmpl">
        {% for (var i=0, file; file=o.files[i]; i++) { %}
            <tr class="template-upload fade">
                <td>
                    <span class="preview"></span>
                </td>
                <td>
                    <p class="name">{%=file.name%}</p>
                    {% if (file.error) { %}
                        <div><span class="label label-important">Error</span> {%=file.error%}</div>
                    {% } %}
                </td>
                <td>
                    <p class="size">{%=o.formatFileSize(file.size)%}</p>
                    {% if (!o.files.error) { %}
                        <div class="progress progress-success progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="bar" style="0%;"></div></div>
                    {% } %}
                </td>
                <td>
                    {% if (!o.files.error && !i && !o.options.autoUpload) { %}
                        <button class="btn btn-primary start">
                            <i class="icon-upload icon-white"></i>
                            <span>Start</span>
                        </button>
                    {% } %}
                    {% if (!i) { %}
                        <button class="btn btn-warning cancel">
                            <i class="icon-ban-circle icon-white"></i>
                            <span>Cancel</span>
                        </button>
                    {% } %}
                </td>
            </tr>
        {% } %}
        </script>
        <!-- The template to display files available for download -->
        <script id="template-download" type="text/x-tmpl">
        {% for (var i=0, file; file=o.files[i]; i++) { %}
            <tr class="template-download fade">
                <td>
                    <span class="preview">
                        {% if (file.thumbnail_url) { %}
                            <a href="{%=file.url%}" title="{%=file.name%}" data-gallery="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
                        {% } %}
                    </span>
                </td>
                <td>
                    <p class="name">
                        <a href="{%=file.url%}" title="{%=file.name%}" data-gallery="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
                    </p>
                    {% if (file.error) { %}
                        <div><span class="label label-important">Error</span> {%=file.error%}</div>
                    {% } %}
                </td>
                <td>
                    <span class="size">{%=o.formatFileSize(file.size)%}</span>
                </td>
                <td>
                    <button class="btn btn-danger delete" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}"{% if (file.delete_with_credentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
                        <i class="icon-trash icon-white"></i>
                        <span>Delete</span>
                    </button>
                    <input type="checkbox" name="delete" value="1" class="toggle">
                </td>
            </tr>
        {% } %}
        </script>      
    </div>


@section scripts
{
    @* <script src="~/Scripts/FileUpload/backload.demo.js"></script>*@
    <script src="~/Scripts/main.js"></script>
}

□ 在web.config中设置目的文件夹CustomerController

<configuration>
  <configSections>
    ...
  <section name="backload" type="Backload.Configuration.BackloadSection, Backload, Version=1.9.3.1, Culture=neutral, PublicKeyToken=02eaf42ab375d363" requirePermission="false" />
  </configSections>

   <backload xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:name="urn:fileupload-schema" xsi:noNamespaceSchemaLocation="Web.FileUpload.xsd">
    <fileSystem filesRoot="~/CustomerController" />
  </backload>
</configuration>

□ 结果

上传界面：

CustomerController文件夹：

 

CustomerController文件夹内容：

  通过为FileUploadHandler的事件IncomingRequestStarted注册方法

□ 思路

为FileUploadHandler的事件IncomingRequestStarted注册方法，再让事件处理异步文件请求。客户端方面，需要一个指向自定义控制器的初始化js文件。

□ FileUploadInstanceController

   public class FileUploadInstanceController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        public async Task<ActionResult> FileHandler()
        {
            FileUploadHandler handler = new FileUploadHandler(Request, this);
            handler.IncomingRequestStarted += handler_IncomingRequestStarted;
            ActionResult result = await handler.HandleRequestAsync();
            return result;
        }

        void handler_IncomingRequestStarted(object sender, Backload.Eventing.Args.IncomingRequestEventArgs e)
        {
            //禁止添加操作
            if (e.Context.HttpMethod == "PUT")
            {
                e.Context.PipelineControl.ExecutePipeline = false;
            }
        }
    }

□ 创建一个指向自定义控制器的js文件main.js

$(function () {
    'use strict';

    var fileUploadUrl = "/FileUploadInstance/FileHandler";


    // Initialize the jQuery File Upload widget:
    $('#fileupload').fileupload({
        url: fileUploadUrl,
        acceptFileTypes: /(jpg)|(jpeg)|(png)|(gif)$/i // Allowed file types
    });

    // Optional: Initial ajax request to load already existing files.
    $.ajax({
        url: fileUploadUrl,
        dataType: 'json',
        context: $('#fileupload')[0]
    })
    .done(function (result) {
        $(this).fileupload('option', 'done')
            .call(this, null, { result: result });
        // Attach the Colorbox plugin to the image files to preview them in a modal window. Other file types (e.g. pdf) will show up in a
        // new browser window.
        $(".files tr[data-type=image] a").colorbox();
    });



    // Initialize the jQuery ui theme switcher:
    $('#theme-switcher').change(function () {
        var theme = $('#theme');
        theme.prop(
            'href',
            theme.prop('href').replace(
                /[w-]+/jquery-ui.css/,
                $(this).val() + '/jquery-ui.css'
            )
        );
    });
});


$("document").ready(function () {
    // The Colorbox plugin needs to be informed on new uploaded files in the template in order to bind a handler to it.
    // There must be a little delay, because the fileuploaddone event is triggered before the new template item is created.
    // A more elegant solution would be to use jQuery's delegated .on method, which automatically binds to the anchors in a
    // newly created template item, and then call colorbox manually.
    $('#fileupload').bind('fileuploaddone', function(e, data) {
        setTimeout(function() { $(".files tr[data-type=image] a").colorbox() }, 1000);
    });
});

□ FileUploadInstance/Index.cshtml视图

同上

□ 在web.config中设置目的文件夹FileUpload

<configuration>
  <configSections>
    ...
  <section name="backload" type="Backload.Configuration.BackloadSection, Backload, Version=1.9.3.1, Culture=neutral, PublicKeyToken=02eaf42ab375d363" requirePermission="false" />
  </configSections>

   <backload xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:name="urn:fileupload-schema" xsi:noNamespaceSchemaLocation="Web.FileUpload.xsd">
    <fileSystem filesRoot="~/FileUpload" />
  </backload>
</configuration>

□ 结果

上传界面：

FileUpload文件夹：

 

FileUpload文件夹内容：

参考资料：
※ http://backload.org/ Backload官网
※ https://github.com/blackcity/Backload#examples Backload例子
※ http://nuget.org/packages/Backload/ nuget上的Backload

※ http://blueimp.github.io/jQuery-File-Upload/ jQuery File Upload官网
※ https://github.com/blueimp/jQuery-File-Upload/wiki  github上的jQuery File Upload介绍
※ https://github.com/blueimp/jQuery-File-Upload  github上的jQuery File Upload源码

※ https://www.nuget.org/packages/JQueryFileUpload_Demo_with_Backload/  下载jQuery File Upload结合Backload的MVC案例