请帮我！如何在react中将文件编码为字符串 base64
handleUploadFile(event) {
let file = event.target.files[0]
// here encoding file base64?
this.setState({
fileData: file,
fileName: file.name
})
}
在 ReactJS 中将 PDF 编码为 base64
IT技术
reactjs
base64
2021-05-05 04:28:52
1个回答
以下是您可以尝试的内容：
handleUploadFile(event) {
let selectedFile = event.target.files;
let file = null;
let fileName = "";
//Check File is not Empty
if (selectedFile.length > 0) {
// Select the very first file from list
let fileToLoad = selectedFile[0];
fileName = fileToLoad.name;
// FileReader function for read the file.
let fileReader = new FileReader();
// Onload of file read the file content
fileReader.onload = function(fileLoadedEvent) {
file = fileLoadedEvent.target.result;
// Print data in console
console.log(file);
};
// Convert data to base64
fileReader.readAsDataURL(fileToLoad);
}
this.setState({
fileData: file,
fileName: fileName
})
}
不过，您可能需要为多个文件更改它。