以角度2读取excel文件 [英] Read excel file in angular 2

问题描述

我正在使用 ng2-File-upload，我想阅读excel 文件及其所有行并获取总数.有什么方法可以通过使用这个模块来实现它，以及如何通过纯 JavaScript 或打字稿来实现它.

I am using ng2-File-upload,i want to read the excel file and all its rows and get the total count. Is there any way i can achieve it by using this module and how to get it done by plain JavaScript or typescript.

推荐答案

我使用了已接受的答案中提到的包.ng2-file-upload 有一个 uploader，它有一个回调函数 this.uploader.onAfterAddingFile.我刚刚调用了我的更改函数并读取了如下文件:

I used the package mentioned in the accepted answer. ng2-file-upload has a uploader that has a call back function this.uploader.onAfterAddingFile. I just called my change function and read the file as below:

 onFileChange(file: any) {
    /* wire up file reader */
    //const target: DataTransfer = <DataTransfer>(evt.target);
    //if (target.files.length !== 1) throw new Error('Cannot use multiple files');
    const reader: FileReader = new FileReader();
    reader.onload = (e: any) => {
        /* read workbook */
        const bstr: string = e.target.result;
        const wb: XLSX.WorkBook = XLSX.read(bstr, { type: 'binary' });

        /* grab first sheet */
        const wsname: string = wb.SheetNames[0];
        const ws: XLSX.WorkSheet = wb.Sheets[wsname];

        /* save data */
        var data = <any>(XLSX.utils.sheet_to_json(ws, { header: 1 }));
        this.totalInventories = data.length > 0 ? data.length - 1 : 0;
    };
    if (file._file)
        reader.readAsBinaryString(file._file);
 }

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