// dataurl 为传进来的base64格式的图片地址, return 返回的为file格式base64ImgtoFile(dataurl,filename='file'){letarr=dataurl.split(',')letmime=arr[0].match(/:(.*?);/)[1]letsuffix=mime.split('/')[1]letbstr=atob(arr[1])letn=bstr.lengthletu8arr=newUint8Array(n)while(n--){u8ar...
requestId: requestId};4const _that = this;5$.ajax({6type: 'post',7data: JSON.stringify(param),8url: _that.deviceUrl,9success: function(data) {10let imgBase='data:image/gif;base64,' + JSON.parse(data).param.image;11let blob...
img.onload=function(){ canvas.height=img.height; canvas.width=img.width; ctx.drawImage(img,0,0);vardataURL = canvas.toDataURL('image/png'); callback(dataURL); canvas=null; }; img.src=url; } 将base64转换为file类型 function dataURLtoFile(dataurl, filename) {vararr = dataurl.split('...
*/functiontranslateBase64ImgToFile(base64,filename,contentType){vararr=base64.split(',')//去掉base64格式图片的头部varbstr=atob(arr[1])//atob()方法将数据解码varleng=bstr.lengthvaru8arr=newUint8Array(leng)while(leng--){u8arr[leng]=bstr.charCodeAt(leng)//返回指定位置的字符的 Unicode 编码}...
un8Arr = bstr[i].charCodeAt(i); } return new Blob([arrBuff], {type: mime}); } 调用方法: const imgBase64 = “data:image/png;base64,iVBORw0KGgo...”; const file = base64toFile(imgBase64 , ‘test.png’); console.log(file);...
js 图片转换base64 base64转换为file对象 代码语言:javascript 复制 functiongetImgToBase64(url,callback){//将图片转换为Base64varcanvas=document.createElement('canvas'),ctx=canvas.getContext('2d'),img=newImage;img.crossOrigin='Anonymous';img.onload=function(){canvas.height=img.height;canvas.width=img...
let imgBase='data:image/gif;base64,' + JSON.parse(data).param.image; let blob= dataURLtoFile(imgBase,'image/jpeg'); _that.submitPic(blob); }, error: function(rsp) { _that.$notify({title: '异常', message: "操作异常,请联系管理员", dangerouslyUseHTMLString: true, type: 'warning'...
functionpreviewImage(fileInput) {const file = fileInput.files[]; fileToBase64(file).then(base64String => {const img = document.createElement('img'); img.src = base64String;document.body.appendChild(img); }).catch(error => {console.error('Error previewing image:', error); });}...
*/functionsumitImageFile(base64Codes){varform=document.forms[0];varformData=newFormData(form);//这里连带form里的其他参数也一起提交了,如果不需要提交其他参数可以直接FormData无参数的构造函数//convertBase64UrlToBlob函数是将base64编码转换为BlobformData.append("imageName",convertBase64UrlToBlob(base64Code...
System.Console.WriteLine(imgAndBase.FileToBase64(@"C:\Users\MACHENIKE\source\repos\ImgToBaseSixFour\ImgToBaseSixFour\GitHub.png")); } 1. 2. 3. 4. 5. 我们在winform上把这个base64变成img放到控件上,大概就长这样吧 代码: public Image Base64ToImg(string base64str) ...