基于jQuery Ajax实现上传文件

$.ajax({
url: "/Admin/ContentManage/SaveEdit",type: "POST",data: formData,contentType: false,//必须false才会避开jQuery对 formdata 的默认处理 XMLHttpRequest会对 formdata 进行正确的处理
processData: false,//必须false才会自动加上正确的Content-Type
success: function (data) {
if (data == "OK") {
alert("保存成功");
$.iDialog("close"); //刷新父页面
}
else {
alert("保存失败：" + data);
}
}
});
}

HttpPostedFileBase file = request.Files[0];
string newFileName = Guid.NewGuid().ToString().Replace("-","") + Path.GetExtension(file.FileName);
string savePath = Path.Combine(physicalPath,newFileName);
file.SaveAs(savePath);
fileName = file.FileName;
string url = Path.Combine(path,newFileName);
return url;