龙岗爱联有学网站建设,网站设计与平面设计区别,温州优化网站方法,wordpress增加付费阅读效果#xff1a;拖拽文件到组件上面时 边框变大变红 松手后发送到服务器(或者点击蓝字手动选择文件)并且把文件名显示在框内#xff0c;美化还没做 html
div classdrapBoxdiv iddrop (dragenter)dragenter($event) (dragov…效果拖拽文件到组件上面时 边框变大变红 松手后发送到服务器(或者点击蓝字手动选择文件)并且把文件名显示在框内美化还没做 html
div classdrapBoxdiv iddrop (dragenter)dragenter($event) (dragover)dragover($event) (dragleave)dragleave($event)on-dropdrop($event) [ngClass]{dragover:isdragover,notdragover:!isdragover}div classdescDrag files here, or/divlabel forfile classinput_descinput classdrag-message-input typefile idfile namefile on-changeinputFile($event) /span classdrag-message-manualclick to select/span/label/divdiv idselectedFilesBox classabsflex *ngIfselectedFilesName.length0div classallFileDesc{{selectedFilesCount}} files selected:/div div classfileDesc *ngForlet item of selectedFilesName{{item}}/div/div
/divTs
import { Component } from angular/core;
import { Observable, catchError, of, switchMap } from rxjs;
import { HttpClient } from angular/common/http;
Component({selector: app-filedrag,templateUrl: ./filedrag.component.html,styleUrls: [./filedrag.component.css]
})
export class FiledragComponent {isdragover:booleanfalse;selectedFilesName:string[][];selectedFilesCount:number 0;constructor(private http: HttpClient){}dragover(e:Event){e.stopPropagation();e.preventDefault();this.isdragovertrue;console.log(dragover);}dragleave(e:Event){e.stopPropagation();e.preventDefault();this.isdragoverfalse;console.log(dragleave);}dragenter(e:Event){e.stopPropagation();e.preventDefault();console.log(dragenter);}drop(e:any){e.stopPropagation();e.preventDefault();this.isdragoverfalse;let dataTransfere.dataTransfer;let filesdataTransfer.files;console.log(files:);console.log(files);this.showSelectedFiles(files);this.handleFiles(files).subscribe();}inputFile(e:any){console.log(e.target.files);this.showSelectedFiles(e.target.files);this.handleFiles(e.target.files).subscribe();
}
showSelectedFiles(files: FileList): void{this.selectedFilesName [];this.selectedFilesCount files.length;for(let i0;ifiles.length;i){this.selectedFilesName.push(files[i].name);}}
handleFiles(filesToUp: FileList): Observable{message:string} {const url: string http://127.0.0.1:5000/up_file;const formData: FormData new FormData();for(let i0;ifilesToUp.length;i){formData.append(files, filesToUp[i]);}return this.http.postany(url, formData).pipe(switchMap((res: {message:string}) { console.log(res); return of(res); }),catchError(er{console.log(er);return of({message:error})}));
}}
Css
.drapBox{position: relative;width: 300px;height: 300px;
}
#drop {position: absolute;width: 100%;height: 100%;display: flex;align-items: center;justify-content: center;z-index: 100;}
.dragover{border: 2px dashed red;zoom:108%;
}
.notdragover{border: 2px dashed grey;
}#file {display: none;
}
.desc{font-size: 1rem;
}
.input_desc {padding-left: 5px;font-size: 1rem;color: #4b87ff;cursor: pointer;
}
.absflex{position: absolute;width: 100%;height: 100%;
}
.allFileDesc{padding: 5px;
}
.fileDesc{display: inline-block;padding: 5px;border: 1px solid #4b87ff;font-style: italic;width: auto;height: 20px;
}后端python flask代码一起贴上
# -*- coding: utf-8 -*-
from flask import Flask,request
from flask import send_from_directory,render_template
from flask_cors import CORS# r/* 是通配符让本服务器所有的URL都允许跨域请求app Flask(__name__)
CORS(app, resourcesr/*)
app.route(/up_file, methods[POST, GET])
def file_receive():# try:files request.files.getlist(files)print(files)if files is None: # 表示没有发送文件return {message: failed}else:return {message: success}
if __name__ __main__:app.run(debugTrue)
