Question

我在输入文本框中上传文件时收到此错误。

未捕获DOMException：无法在'FileReader'上执行'readAsDataURL'：对象已在忙于读取Blob。

我必须上传html文件并预览该文件中的文本，但在上传时会在控制台中抛出此错误。如何解决此错误。这是我的javascript代码 -

>  $(".image-preview-input input:file").change(function (){    
>                   var file = this.files[0];
>                   var reader = new FileReader();
>                   var FileExtension = file.name.split('.')[file.name.split('.').length - 1].toLowerCase();
>                   if(FileExtension !== 'html'){
>                     $('#ValidationMessage').css("color", "red");
>                     $('#ValidationMessage').html("Please select the html extension file.");
>                     this.set('template','');  
>                     $('.image-preview-input input:file').val(""); 
>                   }
>                   // Set preview image into the popover data-content
>                   reader.readAsText(file);
>                   reader.onload = function (e) {                      
>                       $('#ValidationMessage').empty();
>                       $(".image-preview-input-title").text("Change");
>                       $(".image-preview-clear").show();
>                       $(".image-preview-filename").val(file.name);                      
>                       self.set('template',e.target.result);
>                   }    
>                   reader.readAsDataURL(file);
>               });

Answer 1

您正在阅读两次文件。

首先来到这里：

reader.readAsDataURL(file);

然后在这里：

onload()

我没有看到第二次阅读的原因。如果您打算使用它，请将其放在function tick() { link.attr("d", function(d) { var x1 = d.source.x, y1 = d.source.y, x2 = d.target.x, y2 = d.target.y, dx = x2 - x1, dy = y2 - y1, dr = Math.sqrt(dx * dx + dy * dy), // z uzla do ineho uzla drx = dr, dry = dr, xRotation = 0, largeArc = 0, sweep = 1; //do sameho seba if ( x1 === x2 && y1 === y2 ) { xRotation = -45; largeArc = 1; drx = 30; dry = 30; x2 = x2 + 1; y2 = y2 + 1; } return "M" + x1 + "," + y1 + "A" + drx + "," + dry + " " + xRotation + "," + largeArc + "," + sweep + " " + x2 + "," + y2; }); }回调中;

如何在读取文件时解决blob错误？

1 个答案: