上次分享了一款文件上传控件(网址:http://www.cnblogs.com/ushou/archive/2013/01/17/2865332.html),功能也比较多,但总觉得不够完美,经过近几天的发酵,酝酿,终于生产啦,吼吼~~~
这次的上传控件加入新的元素,比如附件列表展示、排序拖动、批量更新等。
俗话说,独乐乐不如众乐乐,现将关键代码分享。
一,首先在MVC中新建分部视图。
<link href="@Url.Content("~/Content/Uploadify/uploadify.css")" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="@Url.Content("~/Content/Uploadify/swfobject.js")"></script> <script type="text/javascript" src="@Url.Content("~/Content/Uploadify/jquery.uploadify.v2.1.4.min.js")"></script> <script src="@Url.Content("~/Content/zDialog/zDialog.js")" type="text/javascript"></script> <script src="@Url.Content("~/Content/zDialog/zDrag.js")" type="text/javascript"></script> <script type="text/javascript"> $(document).ready(function () { $("#uploadify").uploadify({ 'uploader': '/Content/Uploadify/uploadify.swf', 'script': '/Ashx/UploadHandler.ashx', 'cancelImg': '/Content/Uploadify/cancel.png', 'folder': '/UploadFile', 'queueID': 'fileQueue', 'multi': true, 'auto': true, 'fileExt': '*.jpg;*.gif;*.png', 'fileDesc': 'Image Files (.JPG, .GIF, .PNG)', 'queueID': 'custom-demo', 'queueSizeLimit': 9999, 'simUploadLimit': 9999, 'buttonText': '选择文件', 'removeCompleted': true, 'onSelectOnce': function (event, data) { }, 'onComplete': function (event, queueId, fileObj, response, data) { AddFiles(response.split('|')[1], response.split('|')[2]); }, 'onAllComplete': function (event, data) { } }); }); </script>
二:创建两个ashx文件,两个足矣,本来还想压缩到一个的,后来想想还是算了。
这两个ashx,分别拥有以下功能。
1,对数据库中的附件增、删、改、查。
关键代码如下:
public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/html"; string action = RequestExtension.GetQueryString<String>("action", ""); if (action == "") return; MethodInfo methodInfo = this.GetType().GetMethod(action); if (methodInfo != null) { context.Response.Clear(); context.Response.Write(methodInfo.Invoke(this, null)); context.Response.End(); } }
这里action是传入函数名称,然后通过反射调用执行。
用法也是相当简捷:
如下示例:
修改:
$.post("/Ashx/Attachment.ashx?action=Modify", { fileID: fileID, fileName: fileName, fileDesc: fileDesc }, function (txt) { if (txt == "OK") { diag.close(); } else { Dialog.alert(txt); } }, "text");
删除:
//发送请求到服务器删除文件 var fileID = $(obj).parent().parent().attr("id"); $.post("/Ashx/Attachment.ashx?action=DelFile", { fileID: fileID }, function (txt) { if (txt == "OK") { Dialog.close(); var p = $(obj).parent().parent(); p.css('display', 'none'); } else { Dialog.alert(txt); } }, "text");
其他如新建、获取用法也如此,不再细述。
三:JS中操作生成元素、与数据库交互。
这里是新增附件、批量修改、删除附件的关键代码,中间还有页面元素拖动的功能。
function AddFilesUseTb(fileName, fileID, imgUrl) { var cloneTb = $('#tbTemplete').clone().attr('id', fileID); $('#uploadMsg').append(cloneTb.wrap('<div></div>').parent().html()); $("#" + fileID).find("input:eq(0)").val(fileName); if (imgUrl != null) { $("#" + fileID).find("img:eq(0)").attr("src", imgUrl); } //文件上传完成后启用sortable $('.gbin1-list').sortable().bind('sortupdate', function () { }); //文件上传完成后,自动更新序列号 var fileList = $('#uploadMsg').find("table"); var fileCount = $('#uploadMsg').find("table").length; $.post("/Ashx/Attachment.ashx?action=Modify", { fileID: fileID, fileName: fileName, fileDesc: "", IsMove: "N", sequenceNum: fileCount }, function (txt) { if (txt != "OK") { Dialog.alert("保存名称为:" + fileName + "的文件时出错,请重试"); } }, "text"); } function EditAllFiles(obj) { var fileList = $('#uploadMsg').find("table"); var fileCount = $('#uploadMsg').find("table").length; for (var i = 0; i < fileCount; i++) { var fileID = $(fileList[i]).parent().attr("id"); var fileName = $(fileList[i]).find("input:eq(0)").val(); var fileDesc = $(fileList[i]).find("textarea:eq(0)").val(); var IsMove = $(fileList[i]).find('input:checkbox:checked').val(); if (IsMove == "on") { IsMove = "Y"; } else { IsMove = "N"; } $.post("/Ashx/Attachment.ashx?action=Modify", { fileID: fileID, fileName: fileName, fileDesc: fileDesc, IsMove: IsMove, sequenceNum: i+1 }, function (txt) { if (txt != "OK") { Dialog.alert("保存名称为:" + fileName + "的文件时出错,请重试"); } }, "text"); } $(obj).val("已保存"); }; function DelAllFiles(obj) { Dialog.confirm('警告:确定要删除附件?', function () { var fileList = $('#uploadMsg').find("table").each(function () { var fileID = $(this).parent().attr("id"); var fileName = $(this).find("input:eq(0)").val(); $.post("/Ashx/Attachment.ashx?action=DelFile", { fileID: fileID }, function (txt) { if (txt != "OK") { Dialog.alert("删除名称为:" + fileName + "的文件时出错,请重试"); } }, "text"); }); }); } function DelFiles(obj) { Dialog.confirm('警告:确定要删除附件?', function () { //发送请求到服务器删除文件 var tbSelect = $(obj).parent().parent().parent().parent().parent(); var fileID = tbSelect.attr("id"); $.post("/Ashx/Attachment.ashx?action=DelFile", { fileID: fileID }, function (txt) { if (txt == "OK") { Dialog.close(); tbSelect.css('display', 'none'); } else { Dialog.alert(txt); } }, "text"); }); }
四:页如引用分部视图,只需一句话:@Html.Action("Index", "File")
话说这MVC还真是牛掰,比asp.net简捷多了。
五:分享一下使用Dapper的分页代码。
public KeyValuePair<Pagination, IList<AttachmentModel>> AttachmentPagination(Pagination pagin, AttachmentModel condition) { using (SqlConnection conn = DapperFactory.CrateOpenConnection()) { String executeQuery = @"WITH pagintable AS( SELECT ROW_NUMBER() OVER(ORDER BY CreateDate DESC )AS RowID, ID, FileID, TabName, TabID, FileName, FileDesc, FilePath, FileTypeID, FileSize, CreateDate, CreateMan, EditDate, EditMan, IsValid, NeedMoveToMoss, IsMoveToMoss, IsTemp,SequenceNum FROM Attachment WHERE 1= 1) SELECT * FROM pagintable where RowID between ((@CurrentPageIndex - 1) * @PageSize) + 1 and (@CurrentPageIndex * @PageSize)"; String executeCount = "SELECT COUNT(*) AS CountNum FROM Attachment WHERE 1= 1"; var mixCondition = new { CurrentPageIndex = pagin.CurrentPageIndex, PageSize = pagin.PageSize }; List<AttachmentModel> listScore = conn.Query<AttachmentModel>(executeQuery, mixCondition).ToList(); pagin.TotalItemCount = conn.Query<Int32>(executeCount, mixCondition).SingleOrDefault<Int32>(); KeyValuePair<Pagination, IList<AttachmentModel>> result = new KeyValuePair<Pagination, IList<AttachmentModel>>(pagin, listScore); return result; } }
这是使用CodeSmith自动生成的代码,秒秒钟搞定,并且相当灵活及高效。
上张图:
备注:这张图的两个附件顺序是可以拖动变更的,呵呵。
老样子,提供Demo网址,供用户试用及扒源码。