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  • 使用jQuery.FileUpload和Backload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。 

      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

       1:      public class FileUploadDerivedController : BackloadController
       2:      {
       3:          public ActionResult Index()
       4:          {
       5:              return View();
       6:          }
       7:   
       8:          public async Task<ActionResult> FileHandler()
       9:          {
      10:              ActionResult result = await base.HandleRequestAsync();
      11:              return result;
      12:          }
      13:      }

     □ 创建一个指向自定义控制器的js文件main.js

       1:  $(function () {
       2:      'use strict';
       3:   
       4:      var fileUploadUrl = "/FileUploadDerived/FileHandler";
       5:   
       6:      // Initialize the jQuery File Upload widget:
       7:      $('#fileupload').fileupload({
       8:          url: fileUploadUrl,
       9:          acceptFileTypes: /(jpg)|(jpeg)|(png)|(gif)$/i // Allowed file types
      10:      });
      11:   
      12:      // Optional: Initial ajax request to load already existing files.
      13:      $.ajax({
      14:          url: fileUploadUrl,
      15:          dataType: 'json',
      16:          context: $('#fileupload')[0]
      17:      })
      18:      .done(function (result) {
      19:          $(this).fileupload('option', 'done')
      20:              .call(this, null, { result: result });
      21:          // 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 
      22:          // new browser window.
      23:          $(".files tr[data-type=image] a").colorbox();
      24:      });
      25:   
      26:   
      27:      // Initialize the jQuery ui theme switcher:
      28:      $('#theme-switcher').change(function () {
      29:          var theme = $('#theme');
      30:          theme.prop(
      31:              'href',
      32:              theme.prop('href').replace(
      33:                  /[w-]+/jquery-ui.css/,
      34:                  $(this).val() + '/jquery-ui.css'
      35:              )
      36:          );
      37:      });
      38:  });
      39:   
      40:   
      41:  $("document").ready(function () {
      42:      // The Colorbox plugin needs to be informed on new uploaded files in the template in order to bind a handler to it. 
      43:      // There must be a little delay, because the fileuploaddone event is triggered before the new template item is created.
      44:      // A more elegant solution would be to use jQuery's delegated .on method, which automatically binds to the anchors in a
      45:      // newly created template item, and then call colorbox manually.
      46:      $('#fileupload').bind('fileuploaddone', function(e, data) {
      47:          setTimeout(function() { $(".files tr[data-type=image] a").colorbox() }, 1000);
      48:      });
      49:  });    
      50:   

    □ 其中用到了colorbox插件

    install-package colorbox

    11

     □ 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

       1:  <configuration>
       2:    <configSections>
       3:      ...  
       4:    <section name="backload" type="Backload.Configuration.BackloadSection, Backload, Version=1.9.3.1, Culture=neutral, PublicKeyToken=02eaf42ab375d363" requirePermission="false" />
       5:    </configSections>
       6:    
       7:     <backload xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:name="urn:fileupload-schema" xsi:noNamespaceSchemaLocation="Web.FileUpload.xsd">
       8:      <fileSystem filesRoot="~/CustomerController" />
       9:    </backload>
      10:  </configuration>

    □ 结果

    上传界面：

    12

     CustomerController文件夹：
    13

     CustomerController文件夹内容：
    14

      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

       1:     public class FileUploadInstanceController : Controller
       2:      {
       3:          public ActionResult Index()
       4:          {
       5:              return View();
       6:          }
       7:   
       8:          public async Task<ActionResult> FileHandler()
       9:          {
      10:              FileUploadHandler handler = new FileUploadHandler(Request, this);
      11:              handler.IncomingRequestStarted += handler_IncomingRequestStarted;
      12:              ActionResult result = await handler.HandleRequestAsync();
      13:              return result;
      14:          }
      15:   
      16:          void handler_IncomingRequestStarted(object sender, Backload.Eventing.Args.IncomingRequestEventArgs e)
      17:          {
      18:              //禁止添加操作
      19:              if (e.Context.HttpMethod == "PUT")
      20:              {
      21:                  e.Context.PipelineControl.ExecutePipeline = false;
      22:              }
      23:          }
      24:      }
      25:   

     □ 创建一个指向自定义控制器的js文件main.js

       1:  $(function () {
       2:      'use strict';
       3:   
       4:      var fileUploadUrl = "/FileUploadInstance/FileHandler";
       5:   
       6:   
       7:      // Initialize the jQuery File Upload widget:
       8:      $('#fileupload').fileupload({
       9:          url: fileUploadUrl,
      10:          acceptFileTypes: /(jpg)|(jpeg)|(png)|(gif)$/i // Allowed file types
      11:      });
      12:   
      13:      // Optional: Initial ajax request to load already existing files.
      14:      $.ajax({
      15:          url: fileUploadUrl,
      16:          dataType: 'json',
      17:          context: $('#fileupload')[0]
      18:      })
      19:      .done(function (result) {
      20:          $(this).fileupload('option', 'done')
      21:              .call(this, null, { result: result });
      22:          // 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 
      23:          // new browser window.
      24:          $(".files tr[data-type=image] a").colorbox();
      25:      });
      26:   
      27:   
      28:   
      29:      // Initialize the jQuery ui theme switcher:
      30:      $('#theme-switcher').change(function () {
      31:          var theme = $('#theme');
      32:          theme.prop(
      33:              'href',
      34:              theme.prop('href').replace(
      35:                  /[w-]+/jquery-ui.css/,
      36:                  $(this).val() + '/jquery-ui.css'
      37:              )
      38:          );
      39:      });
      40:  });
      41:   
      42:   
      43:  $("document").ready(function () {
      44:      // The Colorbox plugin needs to be informed on new uploaded files in the template in order to bind a handler to it. 
      45:      // There must be a little delay, because the fileuploaddone event is triggered before the new template item is created.
      46:      // A more elegant solution would be to use jQuery's delegated .on method, which automatically binds to the anchors in a
      47:      // newly created template item, and then call colorbox manually.
      48:      $('#fileupload').bind('fileuploaddone', function(e, data) {
      49:          setTimeout(function() { $(".files tr[data-type=image] a").colorbox() }, 1000);
      50:      });
      51:  });    
      52:   

    □ FileUploadInstance/Index.cshtml视图

    同上

     □ 在web.config中设置目的文件夹FileUpload

       1:  <configuration>
       2:    <configSections>
       3:      ...  
       4:    <section name="backload" type="Backload.Configuration.BackloadSection, Backload, Version=1.9.3.1, Culture=neutral, PublicKeyToken=02eaf42ab375d363" requirePermission="false" />
       5:    </configSections>
       6:    
       7:     <backload xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:name="urn:fileupload-schema" xsi:noNamespaceSchemaLocation="Web.FileUpload.xsd">
       8:      <fileSystem filesRoot="~/FileUpload" />
       9:    </backload>
      10:  </configuration>

    □ 结果

    上传界面：

    15

     FileUpload文件夹：
    16

     FileUpload文件夹内容：
    17
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  • 原文地址：https://www.cnblogs.com/wangsai/p/4113303.html
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