[英]How remove invalid or specific files from fileupload in prime ng p-fileUpload?
我使用文件上傳來上傳文件,我想在選擇其中一個文件時驗證文件,如果不是有效文件則刪除它。
html的
<p-fileUpload #fileUpload name="datafiles"
[accept]=FileExtentionValue
[url]="FileUploadUrl"
[showUploadButton]="isUploadEnable"
[disabled]="diableFileupload"
(onUpload)="onUpload($event)"
(onSelect)="validateFile($event)"
multiple="multiple">
</p-fileUpload>
.TS
onUpload(event) {
for (let file of event.files) {
this.uploadedFiles.push(file);
}
this.messageService.add({ severity: 'info', summary: 'File Uploaded', detail: '' });
}
驗證filles名稱
validateFile(event) {
let tempFiles: any = [];
var FileNmaeMust: any;
for (let file of event.files) {
tempFiles.push(file.name);
}
for (let i = 0; i < tempFiles.length; i++) {
let count = 1;
for (let j = 0; j < this.ClientDataFileTypeValue.length; j++) {
FileNmaeMust = "";
if (this.ClientDataFileTypeValue[j] == "Order") {
FileNmaeMust = this.MPID + "_ORDER_";
}
/*** Validate File */
var templen = FileNmaeMust + "YYYYMMDD.psv";
if (tempFiles[i].includes((FileNmaeMust).toLocaleUpperCase()) && tempFiles[i].length == templen.length) {
this.isUploadEnable = true;
break;
}
if (count == this.ClientDataFileTypeValue.length) {
this.isUploadEnable = false;
this.messageService.add({ severity: 'error', summary: 'Files', detail: 'Please select correct file ' + tempFiles[i] });
}
count++;
}
}
}
我已經使用id來推斷它。我定義了#fileUpload並將其傳遞給(onSelect)=“validateFile($ event,fileUpload)”函數以驗證並從數組中刪除此文件。
<p-fileUpload #fileUpload name="datafiles"
[accept]=FileExtentionValu
[url]="FileUploadUrl"
[disabled]="isDiableFileupload"
[showUploadButton]="isUploadEnable"
(onSelect)="validateFile($event,fileUpload)" (onBeforeUpload)="onBeforeSend($event)"
(onUpload)="onUpload($event)"
multiple="multiple">
</p-fileUpload>
.TS
import {FileUpload } from 'primeng/primeng';
validateFile(event, uploader: FileUpload) {
let tempFiles: any = [];
var FileNmaeMust: any;
for (let file of event.files) {
tempFiles.push(file.name);
}
for (let i = 0; i < tempFiles.length; i++) {
let count = 1;
for (let j = 0; j < this.ClientDataFileTypeValue.length; j++) {
FileNmaeMust = "";
if (this.ClientDataFileTypeValue[j] == "Order") {
FileNmaeMust = this.MPID + "_ORDER_";
}
/*** Validate File */
var templen = FileNmaeMust + "YYYYMMDD.psv";
if (tempFiles[i].includes((FileNmaeMust).toLocaleUpperCase()) && tempFiles[i].length == templen.length) {
this.isUploadEnable = true;
break;
}
if (count == this.ClientDataFileTypeValue.length) {
this.isUploadEnable = false;
uploader.remove(event, i);
this.isUploadEnable = true;
this.messageService.add({ severity: 'error', summary: 'Files', detail: 'Please select correct file ' + tempFiles[i] });
}
count++;
}
}
}
onSelect
Event - 選擇文件時調用的回調。
例:
<p-fileUpload #fileUpload name="datafiles"
[accept]=FileExtentionValue
[url]="FileUploadUrl"
[showUploadButton]="isUploadEnable"
(onUpload)="onUpload($event)" multiple="multiple"
(onSelect)="onSelect($event)">
</p-fileUpload>
onUpload(event) {
for (let file of event.files) {
this.uploadedFiles.push(file);
}
this.messageService.add({ severity: 'info', summary: 'File Uploaded', detail: '' });
}
onSelect(event) {
// event.originalEvent: Original browser event.
// event.files: List of selected files.
// Your validation code against list of selected files / selected file.
}
希望這可以幫助。,
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