通过fileReader上传文件到服务器的方法JS部分

//读取图片实例,并上传到服务器
var fileBox = document.getElementById(\'file\');
fileBox.onchange = function () {
//获取选择文件的数组
var fileList = fileBox.files;
for (var i = 0; i < fileList.length; i++) {
var file = fileList[i];
//图片类型验证第二种方式
if (/image\/\w+/.test(file.type))
readFile(file);
else
console.log(file.name + \':不是图片\');
}
}
//读取二进制图片文件，并上传到服务器
function uploadClick() {
var fileList = fileBox.files;
for (var i = 0; i < fileList.length; i++) {
var file = fileList[i];
//图片类型验证第二种方式
if (/image\/\w+/.test(file.type))
uploadFile(file);
else
console.log(file.name + \':不是图片\');
}
}
//关键代码上传到服务器
function uploadFile(file) {
var reader = new FileReader();
reader.readAsArrayBuffer(file);
reader.onload = function () {
var blob = new Blob([reader.result], { type: \'image/jpg\' });
//提交到服务器
var fd = new FormData();
fd.append(\'file\', blob);
var ext = file.name.substring(file.name.lastIndexOf(\'.\'));
fd.append(\'extention\', ext);
fd.append(\'isClip\', -1);
var xhr = new XMLHttpRequest();
xhr.open(\'post\', \'../ashx/upload.ashx\', true);
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
var data = eval(\'(\' + xhr.responseText + \')\');
console.info(data);
if (data.success) {
//上传成功
var imgName = data.msg;
alert(imgName);
} else {
alert(data.msg);
}
}
}
//开始发送
xhr.send(fd);
}
}
//读取图片内容 为DataURL
function readFile(file) {
var reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function (e) {
var result = reader.result;
$(\'.container blockquote\').text(result);
$(\'#img1\').attr(\'src\', result)
}
}