Vue+antd 上傳附件a-upload元件化,附送C#非同步上傳檔案程式碼【NetFrm4.5+】
阿新 • • 發佈:2021-01-07
十年河東,十年河西,莫欺少年窮
學無止境,精益求精
這是一個後端開發人員的倔強
因專案需要,我從一個純後端變成了前端+後端,也俗稱全棧。
在實際專案中,上傳附件幾乎是必不可少的,因此,我們有必要將上傳控制元件進行元件化。
設計理念,通過vue的父子傳值進行封裝,上傳元件為子元件,呼叫方為父元件,由父元件傳值給子元件,用來校驗上傳的副檔名及大小。
子元件
<template> <a-upload :beforeUpload="beforeUpload" :multiple="false" @change="filechange" :customRequestView Code="customRequest" :fileList="fileList" :remove="fileRemove" > <a-button> <a-icon type="upload" /> 選擇檔案 </a-button> </a-upload> </template> <script> export default { props: ["fileinfo"], created() {}, data() { return { fileList: [], }; }, methods: { beforeUpload(file) {var that = this; //console.log(file); return new Promise((resolve, reject) => { const isLt100M = file.size / 1024 / 1024 > that.fileinfo.maxsize; if (isLt100M) { this.$message.warning( "上傳附件大小不能超過" + that.fileinfo.maxsize + "M。" ); returnreject(false); } var index = file.name.lastIndexOf("."); var suffix = file.name.substring(index + 1); if( that.fileinfo.filetype.indexOf(suffix)<0){ this.$message.warning( "上傳的檔案格式不符合要求" ); return reject(false); } return resolve(true); }); }, filechange(info) { //console.log(info); this.fileList = info.fileList; //console.log(this.fileList); if (info.file.status == "uploading") { } if (info.file.status === "done") { } else if (info.file.status === "error") { } }, customRequest(data) { // 上傳提交 const formData = new FormData(); formData.append("file", data.file); this.saveFile(formData); }, saveFile(formData) { let that = this; this.$axios({ url: "/api/File/UploadFileStream", method: "post", data: formData, }) .then(function (result) { //console.log(result); //that.fileList.push(result.Data) if (result.IsSuccess) { for (var i = 0; i < that.fileList.length; i++) { that.fileList[i].status = "done"; } console.log(that.fileinfo.uploadfiles); that.fileinfo.uploadfiles.push(result.Data); that.$message.success("上傳附件成功。"); } else { //that.fileList = []; for (var i = 0; i < that.fileList.length; i++) { if (that.fileList[i].status != "done") { that.fileList.splice(i, 1); } } that.$message.warning(result.ResultMessage); } }) .catch(function (error) { console.log(error); }); }, fileRemove(file) { //console.log(file); var that = this; for (var i = 0; i < that.fileinfo.uploadfiles.length; i++) { if ( that.fileinfo.uploadfiles[i].oldfilename == file.name && that.fileinfo.uploadfiles[i].filesize == file.size ) { that.fileinfo.uploadfiles.splice(i, 1); //alert(1) } } }, }, }; </script>
父元件
<template> <div> <a-row align="middle" class="arowLat"> <a-col :span="12"> <a-checkable-tag v-model="checked" @change="handleChange"> OTA韌體包 </a-checkable-tag> <file-upload v-bind:fileinfo="fileinfo"></file-upload> </a-col> <a-col :span="12"> <a-button @click="submit">提交</a-button> </a-col> </a-row> </div> </template> <script> export default { name: "Echarts", data() { return { checked:false, fileinfo: { maxsize: 1024 * 1024 * 100, filetype: ["jpg", "png"], uploadfiles: [], }, }; }, methods: { submit() { console.log(this.fileinfo.uploadfiles); } }, mounted() {}, }; </script> <style scoped> .img { width: 100%; height: auto; } .arow { text-align: left; } .arowLat { text-align: left; margin-top: 25px; } </style>View Code
下面來簡單分析下上述原始碼
父元件Data中fileinfo的屬性用來校驗檔案大小,副檔名
data() { return { checked:false, fileinfo: { maxsize: 1024 * 1024 * 100, filetype: ["jpg", "png"], uploadfiles: [], }, }; }
注:uploadfiles 用於接收子元件請求後臺的結果,我的後臺返回值為:
{ Data { LocalFilePath: "E:\IOT\IotApi\Content\OTA\4dccdff9bc17413c96d98031a8a451ec.bin", filedata: [80, 19, 0, 32, 1, 33, 0, 8, 1, 139, 0, 8, 69, 114, 0, 8, 229, 138, 0, 8, 43, 74, 0, 8, 219, 182, 0, 8, 0, 0...], filename: "4dccdff9bc17413c96d98031a8a451ec.bin", filepath: "~/Content/OTA/4dccdff9bc17413c96d98031a8a451ec.bin", filesize: 49336, oldfilename: "LBS-1522-YQ4501.jpg", }
IsSuccess: true, ResultCode: 0, ResultMessage: "請求成功...", }
fileinfo 用於傳值給子元件,子元件中有對應的 props,如下
props: ["fileinfo"],
a-upload 元件中有個名叫beforeUpload 的鉤子函式,我們用來校驗上傳的檔案,如果通過校驗,則上傳
beforeUpload(file) { var that = this; //console.log(file); return new Promise((resolve, reject) => { const isLt100M = file.size / 1024 / 1024 > that.fileinfo.maxsize; if (isLt100M) { this.$message.warning( "上傳附件大小不能超過" + that.fileinfo.maxsize + "M。" ); return reject(false); } var index = file.name.lastIndexOf("."); var suffix = file.name.substring(index + 1); if( that.fileinfo.filetype.indexOf(suffix)<0){ this.$message.warning( "上傳的檔案格式不符合要求" ); return reject(false); } return resolve(true); }); },
fileRemove 方法用來同步移除uploadfiles 的元素,保持和元件顯示的上傳檔案一致。
fileRemove(file) { //console.log(file); var that = this; for (var i = 0; i < that.fileinfo.uploadfiles.length; i++) { if ( that.fileinfo.uploadfiles[i].oldfilename == file.name && that.fileinfo.uploadfiles[i].filesize == file.size ) { that.fileinfo.uploadfiles.splice(i, 1); //alert(1) } } },
在元件開發階段,遇到一個問題,上傳成功後,上傳的狀態一直是uploading ,為了解決這個問題,我們需要在filechange、customRequest、saveFile 一起解決。
主要是在 filechange 中給filelist賦值,在saveFile 中當檔案上傳成功後,修改狀態為done,如果上傳失敗,我們需要將filelist中上傳失敗的元素移除。
filechange(info) { //console.log(info); this.fileList = info.fileList; //console.log(this.fileList); if (info.file.status == "uploading") { } if (info.file.status === "done") { } else if (info.file.status === "error") { } }, customRequest(data) { // 上傳提交 const formData = new FormData(); formData.append("file", data.file); this.saveFile(formData); }, saveFile(formData) { let that = this; this.$axios({ url: "/api/File/UploadFileStream", method: "post", data: formData, }) .then(function (result) { //console.log(result); //that.fileList.push(result.Data) if (result.IsSuccess) { for (var i = 0; i < that.fileList.length; i++) { that.fileList[i].status = "done"; } console.log(that.fileinfo.uploadfiles); that.fileinfo.uploadfiles.push(result.Data); that.$message.success("上傳附件成功。"); } else { //that.fileList = []; for (var i = 0; i < that.fileList.length; i++) { if (that.fileList[i].status != "done") { that.fileList.splice(i, 1); } } that.$message.warning(result.ResultMessage); } }) .catch(function (error) { console.log(error); }); },View Code
以上便是整個上傳元件。效果圖有點醜
在父元件,點選提交,即可得到請求上傳介面的返回值
這樣整個元件也就做完了,有了這個元件,以後我們只需在父元件中引用子元件,並新增Props傳值物件fileinfo即可,從而節省了大量的重複程式碼。
下面是C#的後端,不做解釋,只貼程式碼。詳細可參考:https://www.cnblogs.com/chenwolong/p/Uplode.htmlusing Iot.Common; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Net.Http; using System.Threading.Tasks; using System.Web; using System.Web.Http; using System.Web.Http.Cors; namespace Iot.WebSite.Controllers.Apis { [RoutePrefix("api/file")] [EnableCors(origins: "*", headers: "*", methods: "GET,POST,PUT,DELETE")] public class FileController : ApiController { /// <summary> /// 上傳檔案 /// </summary> /// <returns></returns> [HttpPost] public async Task<BaseResponse> UploadFileStream() { var returns = CommonBaseResponse.SetResponse<fileInfoModel>(null, false); string fileType = "OTA";//要建立的子資料夾的名字 var uploadPath = "~/Content"; string filePath = System.Web.HttpContext.Current.Server.MapPath(uploadPath + "/" + fileType + "/");//絕對路徑 //string filePath = uploadPath + "\\" + fileType + "\\"; //E:\Fileup 居家 if (Directory.Exists(filePath) == false) { Directory.CreateDirectory(filePath); } try { var provider = new ReNameMultipartFormDataStreamProvider(filePath); await Request.Content.ReadAsMultipartAsync(provider).ContinueWith(o => { foreach (var file in provider.FileData) { string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');//待上傳的檔名 FileInfo fileinfo = new FileInfo(file.LocalFileName); //判斷開始 string oldName = orfilename;//選擇的檔案的名稱 string fileExt = orfilename.Substring(orfilename.LastIndexOf('.')); string Extension = fileExt; string CreateTime = DateTime.Now.ToString("yyyyMMddHHmmss"); fileInfoModel fileResult = new fileInfoModel() { oldfilename = oldName, LocalFilePath = file.LocalFileName, filesize = fileinfo.Length, filename = fileinfo.Name, filepath = uploadPath + "/" + fileType + "/" + fileinfo.Name }; var fs = fileinfo.OpenRead(); byte[] buffur = new byte[fs.Length]; fs.Read(buffur, 0, (int)fs.Length); fileResult.filedata = buffur.ToList(); returns = CommonBaseResponse.SetResponse<fileInfoModel>(fileResult, true); } }); } catch (Exception ex) { LogHelper.WriteLog("上傳附件出錯:" + ex.ToString()); } return returns; } } /// <summary> /// 重新命名上傳的檔案 /// </summary> public class ReNameMultipartFormDataStreamProvider : MultipartFormDataStreamProvider { public ReNameMultipartFormDataStreamProvider(string root) : base(root) { } public override string GetLocalFileName(System.Net.Http.Headers.HttpContentHeaders headers) { string extension = !string.IsNullOrWhiteSpace(headers.ContentDisposition.FileName) ? Path.GetExtension(GetValidFileName(headers.ContentDisposition.FileName)) : ""; return Guid.NewGuid().ToString().Replace("-", "") + extension; } private string GetValidFileName(string filePath) { char[] invalids = System.IO.Path.GetInvalidFileNameChars(); return String.Join("_", filePath.Split(invalids, StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.'); } } public class fileInfoModel { /// <summary> /// 新檔名稱 /// </summary> public string filename { get; set; } /// <summary> /// 老檔名稱 /// </summary> public string oldfilename { get; set; } /// <summary> /// 伺服器絕對地址 /// </summary> public string LocalFilePath { get; set; } /// <summary> /// 檔案大小 位元組 /// </summary> public long filesize { get; set; } /// <summary> /// 問價資料 /// </summary> public List<byte> filedata { get; set; } /// <summary> /// 檔案相對路徑 /// </summary> public string filepath { get; set; } } }View Code
@天才臥龍的部落格