快速上传文件到文件夹.感觉方便好用.

1.界面HTML代码.enctype="multipart/form-data"  不可缺.

<form id="uploadFileForm" method="post" enctype="multipart/form-data">
???????????????????????<div>
???????????????????????????<input type="hidden" id="uploadFileVersion" name="version" />
???????????????????????????<input type="hidden" id="uploadFileYear" name="year" />
???????????????????????????<input type="file" id="File1" name="fileUpload" multiple>
???????????????????????????<div><label id="uploadFileName" style="color:red;"></label></div>
???????????????????????</div>
???????????????????</form>

2.提交真个From表单.其它参数.可以只能采用URL.传参数的方式. async: false,cache: false,contentType: false,processData: false,  必须设置这几个属性.不然存在兼容性问题.

var formData = new FormData($("#uploadFileForm")[0]);
???????????????????????var prompt = $.initMask({ content: "正在提交，请稍候..." });
???????????????????????//点击事件
???????????????????????$.ajax({
???????????????????????????url: "/PriceSetting/PriceSettingSubmit?company_name=" + company_name + "&pj_name=" + pj_name + "&stage_id=" + stage_id + "&stage_name=" + stage_name + "&desc=" + desc + "&gridjson=" + JSON.stringify(list) + "",
???????????????????????????data: formData,
???????????????????????????type: ‘post‘,
???????????????????????????dataType: ‘json‘,
???????????????????????????async: false,
???????????????????????????cache: false,
???????????????????????????contentType: false,
???????????????????????????processData: false,
???????????????????????????beforeSend: function () {
???????????????????????????????//显示等待
???????????????????????????????prompt.show();
???????????????????????????},
???????????????????????????success: function (result) {
???????????????????????????????alert(result.Message);
???????????????????????????????//提示后关闭等待
???????????????????????????????prompt.close();
???????????????????????????},
???????????????????????});

3.后端代码.

public ActionResult PriceAdjustmentSubmit()
???????{
???????????//获取URL参数
???????????var company_name = Request["company_name"];
???????????var pj_name = Request["pj_name"];
???????????var stage_id = Request["stage_id"];
???????????var stage_name = Request["stage_name"];
???????????var desc = Request["desc"];
???????????var gridjson = Request["gridjson"];
???????????bool isreport = true;

//保存附件到服务器
???????????????//定义文件存放的目标路径
???????????????string proDir = "/Content/PriceSettingFiles";
???????????????string targetDir = System.Web.HttpContext.Current.Server.MapPath("~" + proDir);
???????????????//创建目标路径
???????????????if (!Directory.Exists(targetDir))
???????????????{
???????????????????Directory.CreateDirectory(targetDir);
???????????????}
???????????????//获取客户端上传的文件集合
???????????????HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
???????????????string filePath = string.Empty;
???????????????string filename = string.Empty;
???????????????for (int i = 0; i < files.Count; i++)
???????????????{
???????????????????HttpPostedFile file = files[i];

???????????????????if (file.ContentLength > 1024 * 1024 * 10)
???????????????????{
???????????????????????ret = new
???????????????????????{
???????????????????????????IsSuccess = false,
???????????????????????????Message = "文件" + file.FileName + "不能超过10M！"
???????????????????????};
???????????????????????return Json(ret);
???????????????????}
???????????????????//取得文件的扩展名,并转换成小写
???????????????????string fileExtension = System.IO.Path.GetExtension(file.FileName).ToLower();

???????????????????if (!string.IsNullOrEmpty(fileExtension))
???????????????????{
???????????????????????filename = "楼栋价格调整附件" + file.FileName;
???????????????????????if (!fileExtension.Equals(".docx") && !fileExtension.Equals(".xlsx") && !fileExtension.Equals(".pdf"))//校验文件类型
???????????????????????{
???????????????????????????ret = new
???????????????????????????{
???????????????????????????????IsSuccess = false,
???????????????????????????????Message = "上传文件格式不正确"
???????????????????????????};
???????????????????????????return Json(ret);
???????????????????????}
???????????????????}
???????????????????//组合成文件的完整路径
???????????????????string path = Path.Combine(targetDir, timeStamp + Path.GetFileName(file.FileName));
???????????????????filePath = proDir + "/" + timeStamp + file.FileName;
???????????????????//保存上传的文件到指定路径中
???????????????????if (System.IO.File.Exists(path))
???????????????????{
???????????????????????System.IO.File.Delete(path);
???????????????????}
???????????????????file.SaveAs(path);//保存部分
???????????????}

}

快速上传文件到文件夹.感觉方便好用.

原文地址：https://www.cnblogs.com/TanYong/p/10072617.html