如何在单击按钮时使用角度 4 中的拖放区上传图像



我正在使用dropzone在按钮单击事件时将图像从角度4应用程序上传到webApi。 mydrpzone.processQueue(( 不起作用。在上传按钮上单击我收到此错误,this.drpzone.processQueue不是一个函数。

这是我的代码

app.component.ts

import { Component, ViewChild } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { DropzoneModule, DropzoneComponent, DropzoneDirective, 
DropzoneConfigInterface } from 'ngx-dropzone-wrapper';

@Component({
selector: 'my-app',
templateUrl: `./app.component.html`,
styleUrls: ['./app.component.css']
})
export class AppComponent {
UsreName: string = "Midhun";
@ViewChild('drpzone') drpzone: DropzoneConfigInterface;

myFiles: string[] = [];
sMsg: string = '';
getFileDetails(e: any) {
    //console.log (e.target.files);
    for (var i = 0; i < e.target.files.length; i++) {
        this.myFiles.push(e.target.files[i]);
    }

}
onSending(data: any): void {
    // data [ File , xhr, formData]
    const file = data[0];
    const formData = data[2];
    formData.append('Name', "Midhun");
    console.log("enetered");
}
uploadFiles() {
    //this.drpzone.processQueue();
    this.drpzone.processQueue();
    console.log("uploading...");
}
onSendingmultiple() {
}
onError() {
}
onSuccess() {
}

//public type: string = 'component';
public type: string = 'directive';
public config: DropzoneConfigInterface = {
    url: 'http://localhost:60945/api/fileupload/',
    //url: 'http://localhost:60945/user/PostUserImage',
    //url:'https://httpbin.org/post',
    maxFiles: 5,
    clickable: true,
    acceptedFiles: 'image/*',
    createImageThumbnails: true,
    autoProcessQueue: false,
    addRemoveLinks: true,
};
constructor() { }

}

app.component.html

<div class="text-center well">
            <dropzone [config]="config" #drpzone
                      [message]="'Click or drag images here to upload'"
                      (error)="onError($event)"
                      (sending)="onSending($event)"
                      (sendingmultiple)="onSendingmultiple($event)"
                      (success)="onSuccess($event)">
            </dropzone>
        </div>
        <br />
        <button (click)="uploadFiles()">Upload</button>

如果有人知道如何解决它,请提供帮助。

刚刚用谷歌搜索了一下,这就是我发现的:指令本身不是 Dropzone 实例,因此对于 4.x this.dropzone.dropzone.processQueue(( 或对于 5.x this.dropzone.dropzone((.processQueue((。

带到这里: https://github.com/zefoy/ngx-dropzone-wrapper/issues/60

顺便说一句,我不确定,但这似乎不正确@ViewChild('drpzone'( drpzone: DropzoneConfigInterface;

不应该是@ViewChild('drpzone'( drpzone: DropzoneDirective; ?

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