c# 经典总结Excel导入(高效实用全过程)

首先页面的展示:

当点击直接弹出选择要导入的文件

代码如下:

 
                选择文件:
            
            
                

新建一个Excel,准备好要导入的数据

c# 经典总结Excel导入(高效实用全过程)_第1张图片

JavaScript:  直接复制就行,别看多,都已经写好了。

就三个方法,在不同的时期调用。

对应的c#后台代码:

我写在了MVC的控制器里面,相信.net开发的人都能理解:

看似代码很多,实则不难,虽然多,但是分解的很好,可以做各种各样的验证。

总体过程就是读取几行,我上面写的是3行,那就把3改成你要导入的行数。

定义一个数据库的实体类来接收Excel读取的东西,添加到数据库里即可。

其中:string defauserverpath = ConfigurationManager.AppSettings["AttachmentPersonPath"];为服务器路径

可以随便写一个本地路径:string defauserverpath = "E:\\"; (按照我的方式写就可以。不报错)

/// 
		/// 上传文档文件
		/// 
		/// 
		public JsonResult UploadPersonSubmit1()
		{

			HttpPostedFileBase file = Request.Files["file"];
			#region   上传文件到服务器
			try
			{
				string defauserverpath = "E:\\";      //白名单导入
				//string defauserverpath = ConfigurationManager.AppSettings["AttachmentPersonPath"]; //ConfigurationManager.AppSettings["DefaultServerPath"] + "\\UploadFile";
				if (Directory.Exists(defauserverpath) == false)//如果不存在就创建file文件夹
				{
					Directory.CreateDirectory(defauserverpath);
				}
				string filename = file.FileName.LastIndexOf("\\") > -1 ? file.FileName.Substring(file.FileName.LastIndexOf("\\") + 1) : file.FileName;
				string filepath = Path.Combine(defauserverpath,
					Path.GetFileName(DateTime.Now.ToString().Replace("/", "").Replace(":", "").Replace(" ", "") + "_" + filename));
				file.SaveAs(filepath);
				//string str = "上传文件信息:FILENAME:" + file.FileName + ",FILEPATH:" + filepath + ",上传人:" + ServiceContext.GetUserInfo().UserCode + ",时间为:" + DateTime.Now.ToString();
				//AddOperaLog(str, "上传", "UploadPersonSubmit");
				var result = new { success = true, msg = "上传成功,文件地址:" + filepath + ",", FilePath = filepath };
				return Json(result, "text/html;charset=utf-8", JsonRequestBehavior.AllowGet);
			}
			catch (Exception ex)
			{
				var result = new { success = false, msg = "上传失败" + ex.Message, FilePath = string.Empty };
				return Json(result, "text/html;charset=utf-8", JsonRequestBehavior.AllowGet);
			}
			#endregion



		}

		/// 
		/// 将上传文档文件解析,并插入数据库 navymaster
		/// 
		/// 
		public JsonResult WhitePersonUploadFileToDatabase()
		{
			JsonResultModel result = new JsonResultModel() { success = false };
			try
			{
				string filepath = Request["filepath"];
				#region     解析上传文件内容数据到datatable
				//定义要返回的datatable对象
				DataTable table = new DataTable();
				//excel工作表
				NPOI.SS.UserModel.ISheet sheet = null;
				//数据开始行(排除标题行)
				int startRow = 0;
				try
				{
					if (!System.IO.File.Exists(filepath))
					{
						return null;
					}
					//根据指定路径读取文件
					FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);
					//根据文件流创建excel数据结构
					NPOI.SS.UserModel.IWorkbook workbook = NPOI.SS.UserModel.WorkbookFactory.Create(fs);
					//IWorkbook workbook = new HSSFWorkbook(fs);
					//如果有指定工作表名称
					if (!string.IsNullOrEmpty("Sheet1") || !string.IsNullOrEmpty("Sheet1(1)"))
					{
						sheet = workbook.GetSheet("Sheet1");
						if (sheet == null)
						{
							sheet = workbook.GetSheet("Sheet1(1)");
						}
						//如果没有找到指定的sheetName对应的sheet,则尝试获取第一个sheet
						if (sheet == null)
						{
							result.success = false;
							result.msg = "导入文件内容格式不符合规则";
							return Json(result, JsonRequestBehavior.AllowGet);
						}
					}
					else
					{
						//如果没有指定的sheetName,则尝试获取第一个sheet
						sheet = workbook.GetSheetAt(0);
					}
					if (sheet != null)
					{
						NPOI.SS.UserModel.IRow firstRow = sheet.GetRow(0);
						//一行最后一个cell的编号 即总的列数
						int cellCount = firstRow.LastCellNum;
						if (cellCount == 3)
						{
							//如果第一行是标题列名
							if (true)
							{
								for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
								{
									NPOI.SS.UserModel.ICell cell = firstRow.GetCell(i);
									if (cell != null)
									{
										string cellValue = cell.StringCellValue;
										if (cellValue != null)
										{
											DataColumn column = new DataColumn(cellValue);
											table.Columns.Add(column);
										}
									}
								}
								startRow = sheet.FirstRowNum + 1;
							}
						}
						else
						{
							result.success = false;
							result.msg = "导入文件内容格式不符合规则";
							return Json(result, JsonRequestBehavior.AllowGet);
						}
						//最后一列的标号
						int rowCount = sheet.LastRowNum;
						for (int i = startRow; i <= rowCount; ++i)
						{
							NPOI.SS.UserModel.IRow row = sheet.GetRow(i);
							if (row == null) continue; //没有数据的行默认是null       

							DataRow dataRow = table.NewRow();
							for (int j = row.FirstCellNum; j < cellCount; ++j)
							{
								if (row.GetCell(j) != null) //同理,没有数据的单元格都默认是null
								{
									if (row.GetCell(j).CellType == CellType.Numeric && row.GetCell(j).ToString().IndexOf('-') > 1)
									{
										dataRow[j] = row.GetCell(j).DateCellValue;
									}
									else
									{
										dataRow[j] = row.GetCell(j).ToString().Trim().ToUpper();
									}
								}
								if (i > 0 && j == 0 && string.IsNullOrWhiteSpace(row.GetCell(j).ToString()))
								{
									dataRow[j] = table.Rows[i - 2][0].ToString().Trim().ToUpper();
								}
							}
							table.Rows.Add(dataRow);
						}

					}
				}
				catch (Exception ex)
				{
					throw ex;
				}
				#endregion
				

				#region 判断导入内容
				if (table.Columns[0].ColumnName != "产品线" || table.Columns[1].ColumnName != "目标" || table.Columns[2].ColumnName != "前两月目标" || table.Columns.Count != 3)
				{
					result.success = false;
					result.msg = "导入数据内容不符合规则";
					return Json(result, JsonRequestBehavior.AllowGet);
				}
				#endregion 

				#region    将解析出的数据插入数据库
				List mppointlist = new List();  
				result.msg = "";
				List countlist = new List(); 
				//验证正整数正则
				for (int i = 0; i < table.Rows.Count; i++)
				{
					for (int j = 0; j < table.Columns.Count; j++)
					{
						//非空
						if (string.IsNullOrWhiteSpace(table.Rows[i][j] == null ? "" : table.Rows[i][j].ToString()))
						{
							result.success = false;
							if (!result.msg.Contains("导入数据中第" + (i + 2) + "行" + (j + 1) + "列有空值;"))
							{
								result.msg += "导入数据中第" + (i + 2) + "行" + (j + 1) + "列有空值;";
							}
						}
						else
						{
							if (table.Columns.Count == 3 && j == 0)
							{
								string productline = table.Rows[i][0].ToString();
								string ordertarget = table.Rows[i][1].ToString();
								string mouthagotarget = table.Rows[i][2].ToString();  
							}
						}
					}
				}
				if (!string.IsNullOrWhiteSpace(result.msg))
				{
					return Json(result, JsonRequestBehavior.AllowGet);
				}
				for (int i = 0; i < table.Rows.Count; i++)
				{
					string productline = ""; 
					string ordertarget = "";
					string mouthagotarget = "";

					if (table.Columns.Count == 3)
					{ 
						productline = table.Rows[i][0].ToString();
						ordertarget = table.Rows[i][1].ToString();
						mouthagotarget = table.Rows[i][2].ToString(); 
					}
					else
					{
						productline = table.Rows[i][0].ToString();
						ordertarget = table.Rows[i][1].ToString();
						mouthagotarget = table.Rows[i][2].ToString();
					} 
					SMS_MAINTARGET mppoint = new SMS_MAINTARGET();
					mppoint.MAINTARGETID = GetIndexOfTableID("sms_blackperson_Seq").ToString(); //转了string
					mppoint.PRODUCTLINE = productline;
					mppoint.ORDERTARGET = decimal.Parse(ordertarget);
					mppoint.MOUTHAGOTARGET = decimal.Parse(mouthagotarget); 
					mppoint.CREATE_DT = DateTime.Now;
					mppoint.MAINDATE =  DateTime.Now.ToString("yyyyMMdd");
					mppointlist.Add(mppoint);
				}
				if (mppointlist.Count > 0)
				{
					DBAction.DeleteEntity(DBAction.LoadEntities().ToList());
					DBAction.AddEntity(mppointlist);
				}
				#endregion

				//string str = "数据添加:表名:SMS_INCENTIVE_BLACKPERSONINFO,操作人:" + ServiceContext.GetUserInfo().UserCode + ",时间为:" + DateTime.Now.ToString() + ",文件地址:" + filepath;
				//AddOperaLog(str, "人员黑名单上传并插入", "PersonUploadFileToDatabase");
				result.success = true;
				result.msg = "导入成功";
				//ClearSysWhitCache();
				return Json(result, JsonRequestBehavior.AllowGet);
			}
			catch (Exception ex)
			{
				result.success = false;
				result.msg = "异常信息:" + ex.Message;
				return Json(result, JsonRequestBehavior.AllowGet);
			}
		}

应该会发现没有这个类:

JsonResultModel result = new JsonResultModel() { success = false };

这个类是干嘛的呢?

是我用来追加错误信息的,专门用来累计信息,作为返回结果,如果你不需要可以删除,以下提供这个类的源码:

	public class JsonResultModel
	{ 
		public bool success { get; set; }
		public string state { get; set; }
		public string msg { get; set; }
		public string error { get; set; }
	}

在插入数据库的时候会有要求插入主键,上文中调用了GetIndexOfTableID()方法:

		#region      表主键获取
		/// 
		/// 获取下一主键值
		/// 
		/// 表序列名称
		/// 
		private decimal GetIndexOfTableID(string seq)
		{
			var pkid = new PMSEntities_Fun().Database.SqlQuery(string.Format("select spmsadmin.{0}.nextval from dual", seq)).FirstOrDefault();
			return pkid;
		}
		#endregion

是decimal类型的主键,但是我数据库里string类型的主键,所以ToString()即可。如此便可以  “水路通用” 

相信通过此文,会帮助大家解决导入问题。

如有疑问可与我联系,欢迎留言\点赞。

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