.NET MVC 学习笔记（六）— 数据导入

 

.NET MVC 学习笔记（六）—— 数据导入

在程序使用过程中，有时候需要新增大量数据，这样一条条数据去Add明显不是很友好，这时候最好就是有一个导入功能，导入所需要的数据，下面我们就一起来看一下导入功能。

一. 在导入之前，首先我们需要下载模板，模板下载方法

$("#btnDownloadTemplate")
	.click(function () {
		window.location.href = "@Url.Content("~/Content/ImportClientDataTemplate.xlsx")";
	});

MVC .NET框架中该方法可以在很容易的下载模板文件。

如果是纯前端框架，该方法则无效，运行效果为直接在浏览器中打开模板文件，显然不是我们想要的。此时可以使用以下办法：

/*
 * 下载文件
 */
window.downloadFile = function(sUrl) {
	//iOS devices do not support downloading. We have to inform user about this.
	if(/(iP)/g.test(navigator.userAgent)) {
		alert('Your device does not support files downloading. Please try again in desktop browser.');
		return false;
	}

	//If in Chrome or Safari - download via virtual link click
	if(window.downloadFile.isChrome || window.downloadFile.isSafari) {
		//Creating new link node.
		var link = document.createElement('a');
		link.href = sUrl;

		if(link.download !== undefined) {
			//Set HTML5 download attribute. This will prevent file from opening if supported.
			var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
			link.download = fileName;
		}

		//Dispatching click event.
		if(document.createEvent) {
			var e = document.createEvent('MouseEvents');
			e.initEvent('click', true, true);
			link.dispatchEvent(e);
			return true;
		}
	}

	// Force file download (whether supported by server).
	if(sUrl.indexOf('?') === -1) {
		sUrl += '?download';
	}

	window.open(sUrl, '_self');
	return true;
}

window.downloadFile.isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
window.downloadFile.isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;

方法调用：

downloadFile("../assets/template/Template.xlsx");

二. 数据导入

1. 导入按钮：

<div class="btn-group" style="text-align:right;width:82px">
	<label class="input-group-btn">
		<input id="btnSelectData" type="file" name="file" accept="application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" style="left: -9999px; position: absolute;">
		<span class="btn btn-default" style="border-radius:3px">导入会员</span>
	</label>
</div>

2. 导入按钮事件

// 选择文件事件
$("#btnSelectData").change(function (e) {
	var file = e.target.files[0] || e.dataTransfer.files[0];
	if (file) {
		$.bootstrapLoading.start(
			{
				loadingTips: "正在处理数据，请稍候...",
				opacity: 0.8,
				//loading页面透明度
				backgroundColor: "#000",
				TipsColor: "#555",
			});
		// 获取文件资源
		var file = document.getElementById("btnSelectData").files[0];
		var formData = new FormData();
		formData.append('ExcelData', file);
		// 保存信息
		$.ajax({
			type: "POST",
			async: true,
			url: "@Url.Content("~/Client/ImportClientData")",
			data: formData,
		contentType: false,
		processData: false,
		mimeType: "multipart/form-data",
		success: function (response) {
			response = $.parseJSON(response);
			var option = {
				message: response.ResultMessage,
				title: response.ResultTitle
			};
			Ewin.alert(option);
			if (response.ResultTitle == "Success") {
				$('.message-dialog').on('hide.bs.modal', function () {
					refresh();
				});
			}
		},
		complete: function () {
			$.bootstrapLoading.end();
			$("#btnSelectData").val('');
		}
	});
  }
});

其中$.bootstrapLoading 是Loading功能，导入过程中等待界面，需要导入PerfectLoad.js

3. Controller方法

/// <summary>
/// 导入文件
/// </summary>
/// <returns></returns>
public JsonResult ImportClientData()
{
	string result = String.Empty;
	String fileName = String.Empty;
	// 员工信息
	List<ClientDomain> lsClient = new List<ClientDomain>();
	try
	{
		if (Request.Files.Count > 0)
		{
			HttpPostedFileBase file = Request.Files["ExcelData"];
			String filePath = @"../Upload/TempData/";
			if (Directory.Exists(Server.MapPath(filePath)) == false)//如果不存在就创建file文件夹
			{
				Directory.CreateDirectory(Server.MapPath(filePath));
			}
			fileName = Server.MapPath(filePath) + file.FileName + "_" + DateTime.Now.ToString("yyyyMMddHHmmss") + Path.GetExtension(file.FileName);
			file.SaveAs(fileName);
			// 解析XML文件
			//读取xml
			XmlDocument xdoc = new XmlDocument();
			xdoc.Load(Server.MapPath("/App_Data/ExcelTemplate.xml"));
			XmlElement root = xdoc.DocumentElement;   //获取根节点
			XmlNode node = xdoc.SelectSingleNode("/Functions/Function[@name='Client']");
			// 字段列表
			List<ExcelField> lsExcelFields = new List<ExcelField>();
			foreach (XmlNode item in node.ChildNodes)
			{
				String columnName = item.SelectSingleNode("columnName").InnerText;
				String fieldName = item.SelectSingleNode("fieldName").InnerText;
				lsExcelFields.Add(new ExcelField() { ColumnName = columnName, FieldName = fieldName });
			}
			// 获取Excel信息
			for (int iIndex = 0; iIndex < NPOIHelper.GetNumberOfSheets(fileName); iIndex++)
			{
				// Read the CLP head information
				DataTable dtDatas = NPOIHelper.ReadExcel(fileName, iIndex, 0, 0);
				if (dtDatas == null)
					throw new Exception("Read excel error.");
				ClientDomain client = null;
				for (Int32 iRow = 0; iRow < dtDatas.Rows.Count; iRow++)
				{
					client = new ClientDomain();
					// 遍历所有属性
					lsExcelFields.ForEach(item =>
					{
						String sValue = dtDatas.Rows[iRow][item.ColumnName].ToString();
						Type t = client.GetType();
						PropertyInfo propertyInfo = t.GetProperty(item.FieldName);
						if (propertyInfo.PropertyType == typeof(DateTime) || propertyInfo.PropertyType == typeof(DateTime?))
						{
							if (!String.IsNullOrEmpty(sValue))
							{
								propertyInfo.SetValue(client, DateTime.Parse(sValue), null);
							}
						}
						else if (propertyInfo.PropertyType == typeof(Decimal) || propertyInfo.PropertyType == typeof(Decimal?))
						{
							propertyInfo.SetValue(client, Decimal.Parse(sValue), null);
						}
						else if (propertyInfo.PropertyType == typeof(Int32) || propertyInfo.PropertyType == typeof(Int32?))
						{
							propertyInfo.SetValue(client, Int32.Parse(sValue), null);
						}
						else
						{
							propertyInfo.SetValue(client, sValue, null);
						}
					});
					lsClient.Add(client);
				}
			}
		}
		//保存员工
		result = service.SaveImportDatas(lsClient, CurrentLoginUser);
		// 删除临时文件
		CommonMethod.DeleteFile(fileName);
		if (String.IsNullOrEmpty(result))
		{
			LogHelper.LogOperate(String.Format("导入会员信息{0}条", lsClient.Count), Constant.OPEARTE_LOG_INFO, CurrentLoginUser);
			return new JsonResult()
			{
				JsonRequestBehavior = JsonRequestBehavior.AllowGet,
				Data = new { ResultTitle = Constant.Result_Title_Success, ResultMessage = String.Format(MessageConstant.MESSAGE_IMPORT_SUCCESS, lsClient.Count) }
			};
		}
		else
		{
			LogHelper.LogOperate(String.Format("导入会员信息失败：{0}", result), Constant.OPEARTE_LOG_WARNING, CurrentLoginUser);
			return new JsonResult()
			{
				JsonRequestBehavior = JsonRequestBehavior.AllowGet,
				Data = new { ResultTitle = Constant.Result_Title_Warning, ResultMessage = result }
			};
		}
	}
	catch (Exception ex)
	{
		Log.SaveException(ex);
		return new JsonResult()
		{
			JsonRequestBehavior = JsonRequestBehavior.AllowGet,
			Data = new { ResultTitle = Constant.Result_Title_Error, ResultMessage = ex.Message }
		};
	}
	finally
	{
		// 删除临时文件
		CommonMethod.DeleteFile(fileName);
	}
}

ExcelField.cs

/// <summary>
/// Excel Field
/// </summary>
[Serializable]
[DataContract]
public class ExcelField
{
	[DataMember]
	public String ColumnName { get; set; }

	[DataMember]
	public String FieldName { get; set; }
}

ExcelTemplate.xml

<?xml version="1.0" encoding="utf-8" ?>
<Functions>
  <Function name="Client">
    <field>
      <columnName>卡号</columnName>
      <fieldName>CardNo</fieldName>
    </field>
    <field>
      <columnName>姓名</columnName>
      <fieldName>UserName</fieldName>
    </field>
    <field>
      <columnName>性别</columnName>
      <fieldName>Sex</fieldName>
    </field>
    <field>
      <columnName>出生日期</columnName>
      <fieldName>Birthdate</fieldName>
    </field>
    <field>
      <columnName>手机号</columnName>
      <fieldName>Phone</fieldName>
    </field>
    <field>
      <columnName>地址</columnName>
      <fieldName>Address</fieldName>
    </field>
    <field>
      <columnName>积分</columnName>
      <fieldName>Score</fieldName>
    </field>
    <field>
      <columnName>等级</columnName>
      <fieldName>GradeCode</fieldName>
    </field>
  </Function>
</Functions>

导入数据到数据库

/// <summary>
/// 导入数据
/// </summary>
/// <param name="manager"></param>
/// <param name="lsClient"></param>
/// <param name="user"></param>
/// <returns></returns>
public string SaveImportDatas(DBManager manager, List<ClientDomain> lsClient, LoginUser user)
{
	Int32 iCount = 50;
	Int32 iRunSize = (lsClient.Count / iCount) + 1;
	List<ClientDomain> newList = null;
	string result = String.Empty;
	String sUserId = user.RolesName;
	try
	{
		var waits = new List<EventWaitHandle>();
		for (Int32 iIndex = 0; iIndex < iRunSize; iIndex++)
		{
			//计算每个线程执行的数据
			Int32 startIndex = (iIndex * iCount);
			Int32 iPage = iCount;
			if ((lsClient.Count - startIndex) < iCount)
			{
				iPage = (lsClient.Count - startIndex);
			}
			newList = lsClient.GetRange(startIndex, iPage);
			var handler = new ManualResetEvent(false);
			waits.Add(handler);
			ParamModel data = new ParamModel();
			data.UserId = sUserId;
			data.Data = newList;
			data.manager = manager;
			new Thread(new ParameterizedThreadStart(ImportData)).Start(new Tuple<ParamModel, EventWaitHandle>(data, handler));
			WaitHandle.WaitAll(waits.ToArray());
		}
	}
	catch (Exception ex)
	{
		Log.SaveException(ex);
		result = ex.Message;
	}
	return result;
}

/// <summary>
/// 导入数据
/// </summary>
/// <param name="obj"></param>
private void ImportData(Object obj)
{
	var p = (Tuple<ParamModel, EventWaitHandle>)obj;
	ParamModel param = p.Item1 as ParamModel;
	String sUserId = param.UserId;
	DBManager manager = param.manager;
	List<ClientDomain> models = param.Data as List<ClientDomain>;
	models.ForEach(model =>
	{
		List<ClientDomain> clients = ClientBiz.GetDomainByExactFilter(new ClientFilter() { CardNo = model.CardNo }) as List<ClientDomain>;
		if (clients == null || clients.Count == 0)
		{
			// 添加
			model.CreateUser = sUserId;
			model.CreateDateTime = DateTime.Now;
			model.UpdateUser = sUserId;
			model.UpdateDateTime = DateTime.Now;

			String sql = DataHelper.GenerateInsertSQL(DbTableName.Client, model, new LoginUser() { Uid = sUserId }, DateTime.Now);

			manager.Execute(sql, model);
		}
		else
		{
			// 更新
			model.Id = clients[0].Id;
			model.CreateUser = clients[0].CreateUser;
			model.CreateDateTime = clients[0].CreateDateTime;
			model.UpdateUser = sUserId;
			model.UpdateDateTime = DateTime.Now;

			String sql = DataHelper.GenerateUpdateAllFieldSQL(DbTableName.Client, model, new LoginUser() { Uid = sUserId }, DateTime.Now);

			manager.Execute(sql, model);
		}
	});
	p.Item2.Set();
}

以上，数据导入功能完成。

以下程序运行效果

 PS： 在Excel导入时，也可以在ExcelTemplate.xml中配置一些字段Check的问题

例如：

    <field>
      <columnName>卡号</columnName>
      <fieldName>CardNo</fieldName>
      <checkList>
        <!--NotNull:非空 Length:字段长度 Type:字段类型-->
        <NotNull>Y</NotNull>
        <Length>20</Length>
        <Type></Type>
      </checkList>
    </field>

ExcelField.cs & CheckModel.cs

/// <summary>
/// Excel 字段
/// </summary>
public class ExcelField
{
	/// <summary>
	/// Excel列名
	/// </summary>
	[DataMember]
	public String ColumnName { get; set; }
	/// <summary>
	/// 字段名称
	/// </summary>
	[DataMember]
	public String FieldName { get; set; }
	/// <summary>
	/// 检测
	/// </summary>
	[DataMember]
	public CheckModel CheckModel { get; set; }
}

/// <summary>
/// 检查项目
/// </summary>
public class CheckModel
{
	/// <summary>
	/// 非空
	/// </summary>
	[DataMember]
	public String NotNull { get; set; }
	/// <summary>
	/// 字段长度检测
	/// </summary>
	[DataMember]
	public Int32 Length { get; set; }
	/// <summary>
	/// 字段类型
	/// </summary>
	[DataMember]
	public String Type { get; set; }
}

字段信息获取以及字段检查方法

/// <summary>
/// 获取所有Excel字段
/// </summary>
/// <param name="functionName">功能名</param>
/// <returns></returns>
public static List<ExcelField> GetExcelFields(String functionName)
{
	// 解析XML文件
	//读取xml
	XmlDocument xdoc = new XmlDocument();
	xdoc.Load("Content/ExcelTemplate.xml");
	XmlElement root = xdoc.DocumentElement;   //获取根节点
	XmlNode node = xdoc.SelectSingleNode(String.Format("/Functions/Function[@name='{0}']", functionName));
	// 字段列表
	List<ExcelField> lsExcelFields = new List<ExcelField>();
	foreach (XmlNode item in node.ChildNodes)
	{
		String columnName = item.SelectSingleNode("columnName").InnerText;
		String fieldName = item.SelectSingleNode("fieldName").InnerText;
		ExcelField excelField = new ExcelField();
		// 列名
		excelField.ColumnName = columnName;
		// 字段名
		excelField.FieldName = fieldName;
		XmlNodeList childNode = item.SelectNodes("checkList");
		if (childNode != null && childNode.Count != 0)
		{
			CheckModel check = new CheckModel();
			// 非空判断
			check.NotNull = childNode[0].SelectSingleNode(Constant.Check_NotNull) == null ? "" : (childNode[0].SelectSingleNode(Constant.Check_NotNull).FirstChild == null ? "" : childNode[0].SelectSingleNode(Constant.Check_NotNull).FirstChild.Value);
			// 长度判断
			check.Length = childNode[0].SelectSingleNode(Constant.Check_Length) == null ? -1 : (childNode[0].SelectSingleNode(Constant.Check_Length).FirstChild == null ? -1 : Int32.Parse(childNode[0].SelectSingleNode(Constant.Check_Length).FirstChild.Value));
			// 字段类型
			check.Type = childNode[0].SelectSingleNode(Constant.Check_Type) == null ? "" : (childNode[0].SelectSingleNode(Constant.Check_Type).FirstChild == null ? "" : childNode[0].SelectSingleNode(Constant.Check_Type).FirstChild.Value);
			excelField.CheckModel = check;
		}
		lsExcelFields.Add(excelField);
	}

	return lsExcelFields;
}

/// <summary>
/// 检查字段
/// </summary>
/// <param name="excel"></param>
/// <param name="value"></param>
/// <param name="iRowIndex"></param>
/// <returns></returns>
public static String CheckFieldValue(ExcelField excel, String value, Int32 iRowIndex)
{
	StringBuilder sb = new StringBuilder();
	try
	{
		// 非空判断
		if (Constant.NotNull_Y.Equals(excel.CheckModel.NotNull) && String.IsNullOrEmpty(value))
		{
			sb.AppendLine(String.Format("第{0}行，{1}列值不能为空。", iRowIndex, excel.ColumnName));
		}
		// 长度判断
		if (excel.CheckModel.Length != -1 && (!String.IsNullOrWhiteSpace(value) && value.Length > excel.CheckModel.Length))
		{
			sb.AppendLine(String.Format("第{0}行，{1}列值长度不能超过{2}。", iRowIndex, excel.ColumnName, excel.CheckModel.Length));
		}
		// 类型判断
		if (!String.IsNullOrWhiteSpace(excel.CheckModel.Type))
		{
			// 正则表达式
			String pattern = String.Empty;
			// 表达式结果
			Boolean bResult = true;
			switch (excel.CheckModel.Type)
			{
				// 正整数判断
				case Constant.Type_PositiveInteger:
					pattern = @"^[0-9]*[1-9][0-9]*$";
					bResult = Regex.IsMatch(value ?? "", pattern);
					if (!bResult)
					{
						sb.AppendLine(String.Format("第{0}行，{1}列值应该输入正整数。", iRowIndex, excel.ColumnName));
					}
					break;
				case Constant.Type_Telephone:
					pattern = @"(/(/d{3,4}/)|/d{3,4}-|/s)?/d{7,14}";
					bResult = Regex.IsMatch(value ?? "", pattern);
					if (!bResult)
					{
						sb.AppendLine(String.Format("第{0}行，{1}列值应该输入正确电话号码。", iRowIndex, excel.ColumnName));
					}
					break;
				case Constant.Type_Email:
					pattern = @"^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$";
					bResult = Regex.IsMatch(value ?? "", pattern);
					if (!bResult)
					{
						sb.AppendLine(String.Format("第{0}行，{1}列值应该输入正确邮箱。", iRowIndex, excel.ColumnName));
					}
					break;
			}
		}
		return sb.ToString().Trim();
	}
	catch (Exception ex)
	{
		return ex.Message;
	}
}

/// <summary>
/// 设置属性值
/// </summary>
/// <param name="obj">对象</param>
/// <param name="fieldName">字段名</param>
/// <param name="value">字段值</param>
public static void SetPropertyInfoValue(Object obj,String fieldName, String value)
{
	Type t = obj.GetType();
	PropertyInfo propertyInfo = t.GetProperty(fieldName);
	// 时间类型
	if (propertyInfo.PropertyType == typeof(DateTime) || propertyInfo.PropertyType == typeof(DateTime?))
	{
		if (!String.IsNullOrEmpty(value))
		{
			DateTime dt;
			if (DateTime.TryParse(value, out dt))
			{
				propertyInfo.SetValue(obj, dt, null);
			}
		}
	}
	// Decimal 类型
	else if (propertyInfo.PropertyType == typeof(Decimal)|| propertyInfo.PropertyType == typeof(Decimal?))
	{
		if (!String.IsNullOrEmpty(value))
		{
			Decimal dValue;
			if (Decimal.TryParse(value, out dValue))
			{
				propertyInfo.SetValue(obj, dValue, null);
			}
		}
	}
	// Int32 类型
	else if (propertyInfo.PropertyType == typeof(Int32) || propertyInfo.PropertyType == typeof(Int32?))
	{
		if (!String.IsNullOrEmpty(value))
		{
			Int32 iValue;
			if (Int32.TryParse(value, out iValue))
			{
				propertyInfo.SetValue(obj, iValue, null);
			}
		}
	}
	else
	{
		propertyInfo.SetValue(obj, value, null);
	}
}