参考:http://smotive.iteye.com/blog/1903606
大部分我也是根据他的方法修改的,我也要根据name实现动态的多文件上传功能,但是有个问题使我一直无法实现多文件上传。
就是我发现上传到后台的文件的数目是你要上传数量的平方。找了很久才发现这是因为他的代码还是有点小问题:
前段时间做项目有个一个实现多文件上传的功能,因为以前也没有接触过,于是花了好几天时间才给弄好了,但是回头一看也没什么,咋就花了那么长时间呢,看来自己的效率有待提高啊。axFileUpload.js里面的代码修改一下就能支持多个Id同时上传,把源码中的这个:
if (typeof (fileElementId) == 'string') {
fileElementId = [fileElementId];
}
for (var i in fileElementId) {
//按name取值
var oldElement = jQuery("input[name=" + fileElementId[i] + "]");
oldElement.each(function () {
var newElement = jQuery($(this)).clone();
jQuery(oldElement).attr('id', fileId);//只将旧元素的Id修改,没有修改name
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
});
}
因为是按name上传,那么我们需要把原页面中的name属性给修改掉,再加一行就ok了:
if (typeof (fileElementId) == 'string') {
fileElementId = [fileElementId];
}
for (var i in fileElementId) {
//按name取值
var oldElement = jQuery("input[name=" + fileElementId[i] + "]");
oldElement.each(function () {
var newElement = jQuery($(this)).clone();
//jQuery(this).attr('id', fileId);
jQuery(this).attr('name', fileId);
jQuery(this).before(newElement);
jQuery(this).appendTo(form);
});
}
,这样就能实现根据name动态多文件上传了。
页面代码如下:
<body style="background: #FFFFFF;">
<form action="/Home/UploadImage" id="form1" name="form1" method="post">
<table style="width: 100%" class="SubTable">
<tbody>
<tr class="tr">
<td style="width: 80%">
<input name="upload" type="file" onchange="IsRepeat(this)" style="width: 100%" />
</td>
<td style="width: 20%">
<input type="button" value="删除" onclick="deletefile(this, 4)" />
</td>
</tr>
<tr class="footTr">
<td colspan="2">
<input type="button" value="添加" onclick="addfile(this, 4)" /></td>
</tr>
<tr>
<td style="text-align: center" colspan="2">
<input type="button" value="提交" id="BtnSub" /></td>
</tr>
</tbody>
</table>
<table>
<tr>
<td style="height: 130px; width: 18%">图片预览:
</td>
<td style="height: 130px; width: 82%">
<table style="width: 100%" class="SubTable">
<tbody>
<tr class="tr">
<td>
<div id="trimagedivBef" style="display: none"></div>
</td>
<td style="width: 25%">
<input style="width: 100px; height: 80px; display: none" type="image">
</td>
<td style="width: 25%">
<input style="width: 100px; height: 80px; display: none" type="image">
</td>
<td style="width: 25%">
<input style="width: 100px; height: 80px; display: none" type="image">
</td>
<td style="width: 25%">
<input style="width: 100px; height: 80px; display: none" type="image">
</td>
<td>
<div id="trimagedivAft" style="display: none"></div>
</td>
</tr>
<tr class="footer">
<td>
<div id="footerimagedivBef" style="display: none"></div>
</td>
<td class='footertd' style="width: 25%">
<div style="display: none"><a href="#">删除</a></div>
</td>
<td class='footertd' style="width: 25%">
<div style="display: none"><a href="#">删除</a></div>
</td>
<td class='footertd' style="width: 25%">
<div style="display: none"><a href="#">删除</a></div>
</td>
<td class='footertd' style="width: 25%">
<div style="display: none"><a href="#">删除</a></div>
</td>
<td style="text-align: center">
<div id="footerimagedivAft" style="display: none"></div>
</td>
</tr> </tbody>
</table>
</td>
</tr>
</table>
</form>
</body>
js代码,上传成功后要实现预览功能,如果不考虑安全因素的话直接获取图片保存在的路径就行,但是这样是肯定不被允许的,太不安全,于是把文件放到一个指定的文件夹下
后再通过一个action获取该图片的路径:
<script src="~/Scripts/jquery-1.7.1.min.js"></script>
<script src="~/js/ajaxfileupload.js"></script>
<script type="text/javascript"> function IsRepeat(obj) {
var filters = "jpg png bmp"; var val = $(obj).val();
var arr = val.split('.');
if (filters.indexOf(arr[arr.length - 1]) < 0) {
$(obj).val("");
alert("请上传 " + filters + " 格式的图片", "提示");
return;
}
var count = 0;
$("input[name='upload']").each(function () {
if ($(this).val()) {
if ($(this).val() == val) {
if (count >= 1) {
$(this).val("");
alert("已上传该图片,请重新选择!", "提示");
return;
}
count++;
}
} })
} function deleteImage(val) {
if (confirm("是否删除图片?")) {
falg = false;
var id = "#del_" + val;
$(id).parent().remove();
id = "#image_" + val;
$(id).parent().remove();
$("#trimagedivAft").closest("td").before("<td style=\"width:25%\"><input style=\"width:100px;height:80px;display:none\" type=\"image\" src=\"#\"></td>");
$("#footerimagedivAft").closest("td").before("<td class='footertd' style=\"text-align:center;width:25%\"><div style=\"display:none\"><a href=\"#\">删除</a></div></td>");
}
} function addfile(obj, maxNum) {
$(obj).closest("tr").before(" <tr class=\"tr\"><td width=\"80%\"><input name=\"upload\" type=\"file\" onchange=\"IsRepeat(this)\" style=\"width:100%;\" /></td><td width=\"20%\"><input type=\"button\" value=\"删除\" onclick=\"deletefile(this," + maxNum + ");\" /> </td></tr>");
//检测是否已经到达最大的个数,需要隐藏添加按钮
if (maxNum > 0) {
if ($(obj).closest("table").children().children(".tr").length == maxNum) {
$(obj).hide();
}
}
return false;
} function deletefile(obj, maxNum) {
//检测是否已经到达最大的个数,需要隐藏添加按钮
if (maxNum > 0) {
var inputAdd = $(obj).closest("table").children().children(".footTr").children().children("input");
var num = $(obj).closest("table").children().children(".tr").length;
$(obj).closest("tr").remove();
if ((num - 1) < maxNum) {
inputAdd.show(); //定位到添加按钮
}
}
else {
$(obj).closest("tr").remove();
}
return false;
}
var falg = false;
var countFalg = 0; $("#BtnSub").click(function () {
var falg = true;
$("input[name='upload']").each(function () {
if ($(this).val() == "") {
falg = false;
}
}) if (!falg) {
alert("上传图片不能为空", "提示");
return;
}
$.ajaxFileUpload({
url: "@Url.Action("PhotoUploadImage", "Home")",
secureuri: false,
fileElementId: 'upload',//修改了ajaxFileUpload.js源码,支持上传多个name相同的文件,修改处在45行~57行
dataType: 'json',
success: function (data, status) { //alert(data['status'] + '-----' + data['fileName'] + '-----' + data['extName']);
if (data != null) {
var returnValue = data['filePath'];
if (returnValue) { var array = returnValue.split('|');
var retLen = array.length;
var ss = "";
for (var i = 0; i < array.length; i++) {
if (array[i]) {
var len = $("#trimagedivAft").closest("tr").children(".td").length;
var ran = Math.ceil(Math.random() * 9999999999999999);
var fp = ""; fp = "@Url.Action("ShowImage", "Home")" + "?filePath=" + array[i].split(',')[0];
if (!falg) {
$("#trimagedivAft").parent().prev().remove();
$("#footerimagedivAft").parent().prev().remove();
$("#trimagedivBef").closest("td").after("<td class='td' style=\"width:25%\"><input width='100px' id='image_" + ran + "' height='80px' value=" + array[i] + " src=" + fp + " type=\"image\"/></td>"); $("#footerimagedivBef").closest("td").after("<td class='footertd' style=\"text-align:center;width:25%\"><div onclick='deleteImage(" + ran + ")' id='del_" + ran + "'><a href=\"#\">删除</a></div></td>");
} else {
$("#trimagedivBef").parent().next().remove();
$("#footerimagedivBef").parent().next().remove();
$("#trimagedivAft").closest("td").before("<td class='td' style=\"width:25%\"><input width='100px' id='image_" + ran + "' height='80px' value=" + array[i] + " src=" + fp + " type=\"image\"/></td>");
$("#footerimagedivAft").closest("td").before("<td class='footertd' style=\"text-align:center;width:25%\"><div onclick='deleteImage(" + ran + ")' id='del_" + ran + "'><a href=\"#\">删除</a></div></td>");
}
countFalg++;
if (countFalg >= 4) {
falg = true;
}
} }
}
}
},
error: function (data, status, e) {
//alert(e);
alert("上传失败");
return false;
}
})
})
</script>
后台上传代码:
//上传附件
public void PhotoUploadImage(object sender, EventArgs e)
{
var files = Request.Files;
DateTime now = DateTime.Now;
string time = DateTime.Now.ToString("yyyy-MM");
string tmpPath = Server.MapPath("~/App_Data/upload/images/" + time);
string filesPathArr = "";
if (files != null && files.Count > )
{
for (int i = ; i < files.Count; i++)
{ var file = files[i]; if (Directory.Exists(tmpPath) == false)//如果不存在就创建file文件夹
{
Directory.CreateDirectory(tmpPath);
}
double fileSize = file.ContentLength; Thread.Sleep();
string name = Path.GetFileNameWithoutExtension(file.FileName);
string extName = Path.GetExtension(file.FileName);
string fileName = DateTime.Now.ToString("yyyyMMddHHmmssfffff") + extName;
try
{
string filePath = tmpPath + "/" + fileName;
file.SaveAs(filePath); filesPathArr += "/App_Data/upload/images/" + time + "/" + fileName + "," + fileSize + "," + name + "," + extName + "|";
}
catch (Exception ex)
{
Response.Write(@"{
status : 'error',
msg : '" + ex.Message + @"'
}");
Response.End();
return;
}
}
} Response.Write(@"{
status : 'success',
msg: {
Origin : ''
},
filePath:'" + filesPathArr + @"'
}");
}
获取上传图片路径的代码:
public ActionResult ShowImage(string filePath = "")
{
string path = Server.MapPath("~" + filePath);
return base.File(path, "Image/jpeg");
}