功能是要上傳一個文件，判斷這個文件名稱是否已存在，存在的話提示用戶修改文件名稱。Java代碼 'onSelect': function(e, queueId, fileObj) { if(checkFileNames(fileObj.name)){ alert("已存在名為:" + fileObj.name + "的文件，請修改文件名稱！"); return false; } }, onSelect方法如上面所示，checkFileNames用于判斷文件名是否已存在，存在返回true,不存在返回false?，F在的情況是alert已經出來了，可是文件還是上傳上去了。怎么破？求大神~！~
2 回答
胡說叔叔
TA貢獻1804條經驗 獲得超8個贊
做過類似的東西，是在onUploadStart中判斷的，弄了好久才搞定
'onUploadStart': function (file) {
var myself = this;
if（已存在）{
myself.cancelUpload(file.id);
$('#' + file.id).remove();
}
}
是根據uploadify源碼中改的
// Triggered right before a file is uploaded
onUploadStart: function (file) {
// Load the swfupload settings
var settings = this.settings;
var timer = new Date();
this.timer = timer.getTime();
this.bytesLoaded = 0;
if (this.queueData.uploadQueue.length == 0) {
this.queueData.uploadSize = file.size;
}
if (settings.checkExisting) {
$.ajax({
type: 'POST',
async: false,
url: settings.checkExisting,
data: { filename: file.name },
success: function (data) {
if (data == 1) {
var overwrite = confirm('A file with the name "' + file.name + '" already exists on the server.\nWould you like to replace the existing file?');
if (!overwrite) {
this.cancelUpload(file.id);
$('#' + file.id).remove();
if (this.queueData.uploadQueue.length > 0 && this.queueData.queueLength > 0) {
if (this.queueData.uploadQueue[0] == '*') {
this.startUpload();
} else {
this.startUpload(this.queueData.uploadQueue.shift());
}
}
}
}
}
});
}
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