[点晴永久免费OA]【C#】使用NPOI封装能用于绝大部分场景的导出Execl文件的辅助类
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
namespace C.Customization.Framework
{
/// <summary>
/// Npoi辅助类
/// </summary>
public class NpoiHepler
{
/// <summary>
/// 实体类集合导出指定字段到EXCLE
/// </summary>
/// <param name="cellHeard">单元头的Key和Value：{ { "UserName", "姓名" }, { "Age", "年龄" } };</param>
/// <param name="enList">数据源</param>
/// <param name="sheetName">工作表名称</param>
/// <param name="filePath">路径.xls</param>
/// <returns>
/// 文件的下载地址
/// </returns>
public static MessageInfo EntitysToExcel(Dictionary<string, string> cellHeard, IList enList, string sheetName, string filePath)
{
try
{
// 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.createDirectory(directoryName);
}
// 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.createSheet(sheetName); // 工作表
IRow row = sheet.createRow(0);
List<string> keys = cellHeard.Keys.ToList();
for (int i = 0; i < keys.Count; i++)
{
row.createCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
sheet.SetColumnWidth(i, 30 * 256);
}
// 3.List对象的值赋值到Excel的单元格里
int rowIndex = 1; // 从第二行开始赋值(第一行已设置为单元头)
foreach (var en in enList)
{
IRow rowTmp = sheet.createRow(rowIndex);
for (int i = 0; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = null; // 属性的值
System.Reflection.PropertyInfo properotyInfo = null; // 属性的信息
// 3.1 若属性头的名称包含'.',就表示是子类里的属性，那么就要遍历子类，eg：UserEn.UserName
if (keys[i].IndexOf(".") >= 0)
{
// 3.1.1 解析子类属性(这里只解析1层子类，多层子类未处理)
string[] properotyArray = keys[i].Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
string subClassName = properotyArray[0]; // '.'前面的为子类的名称
string subClassProperotyName = properotyArray[1]; // '.'后面的为子类的属性名称
System.Reflection.PropertyInfo subClassInfo = en.GetType().GetProperty(subClassName); // 获取子类的类型
if (subClassInfo != null)
{
// 3.1.2 获取子类的实例
var subClassEn = en.GetType().GetProperty(subClassName).GetValue(en, null);
// 3.1.3 根据属性名称获取子类里的属性类型
properotyInfo = subClassInfo.PropertyType.GetProperty(subClassProperotyName);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(subClassEn, null); // 获取子类属性的值
}
}
}
else
{
// 3.2 若不是子类的属性，直接根据属性名称获取对象对应的属性
properotyInfo = en.GetType().GetProperty(keys[i]);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(en, null);
}
}
// 3.3 属性值经过转换赋值给单元格值
if (properotyValue != null)
{
cellValue = properotyValue.ToString();
// 3.3.1 对时间初始值赋值为空
if (cellValue.Trim() == "0001/1/1 0:00:00"
|| cellValue.Trim() == "0001/1/1 23:59:59"
|| cellValue.Trim() == "1970-01-01 00:00:00")
{
cellValue = "";
}
}
// 3.4 填充到Excel的单元格里
rowTmp.createCell(i).SetCellValue(cellValue);
}
rowIndex++;
}
// 4.生成文件
FileStream file = new FileStream(filePath, FileMode.create);
workbook.Write(file);
file.Close();
// 5.返回下载路径
return new MessageInfo() { IsSucceed = true, Message = filePath };
}
catch (Exception ex)
{
return new MessageInfo() { IsSucceed = false, Message = ex.Message };
}
}
/// <summary>
/// 实体类集合导出指定字段到EXCLE
/// </summary>
/// <param name="cellHeard">单元头的Key和Value：{ { "UserName", "姓名" }, { "Age", "年龄" } };</param>
/// <param name="enList">数据源</param>
/// <param name="sheetName">工作表名称</param>
/// <param name="filePath">路径.xls</param>
/// <returns>
/// 文件的下载地址
/// </returns>
public static MessageInfo DataTableToExcel(Dictionary<string, string> cellHeard, DataTable enList, string sheetName, string filePath)
{
try
{
// 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.createDirectory(directoryName);
}
// 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.createSheet(sheetName); // 工作表
IRow row = sheet.createRow(0);
List<string> keys = cellHeard.Keys.ToList();
for (int i = 0; i < keys.Count; i++)
{
row.createCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
sheet.SetColumnWidth(i, 30 * 256);
}
// 3.List对象的值赋值到Excel的单元格里
int rowIndex = 1; // 从第二行开始赋值(第一行已设置为单元头)
for (int en=0;en<enList.Rows.Count;en++)
{
IRow rowTmp = sheet.createRow(rowIndex);
for (int i = 0; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = enList.Rows[en][keys[i]]; // 属性的值
// 3.3 属性值经过转换赋值给单元格值
if (properotyValue != null)
{
cellValue = properotyValue.ToString();
// 3.3.1 对时间初始值赋值为空
if (cellValue.Trim() == "0001/1/1 0:00:00"
|| cellValue.Trim() == "0001/1/1 23:59:59"
|| cellValue.Trim() == "1970-01-01 00:00:00")
{
cellValue = "";
}
}
// 3.4 填充到Excel的单元格里
rowTmp.createCell(i).SetCellValue(cellValue);
}
rowIndex++;
}
// 4.生成文件
FileStream file = new FileStream(filePath, FileMode.create);
workbook.Write(file);
file.Close();
// 5.返回下载路径
return new MessageInfo() { IsSucceed = true, Message = filePath };
}
catch (Exception ex)
{
return new MessageInfo() { IsSucceed = false, Message = ex.Message };
}
}
}
}
/// <summary>
/// 导出
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
protected void Tb1_Export_Click(object sender, EventArgs e)
{
//导出
List<Mem_MemberInfo> mems = Mem_MemberService.GetInstance().GetListAll();
Dictionary<string, string> cellHead = new Dictionary<string, string>();
cellHead[nameof(Mem_MemberInfo.UserName)] = "用户昵称";
cellHead[nameof(Mem_MemberInfo.Mobile)] = "手机号";
cellHead[nameof(Mem_MemberInfo.Balance)] = "余额";
cellHead[nameof(Mem_MemberInfo.RealName)] = "真实姓名";
cellHead[nameof(Mem_MemberInfo.IdCardNum)] = "身份证号码";
cellHead[nameof(Mem_MemberInfo.createTime)] = "注册时间";
cellHead[nameof(Mem_MemberInfo.Freeze)] = "冻结金额";
cellHead[nameof(Mem_MemberInfo.IdentityName)] = "等级";
string filename = $"用户数据{DateTime.Now:yyyyMMddHHmmss}.xls";
string filepath = Server.MapPath($"{PageParam.DocumentPath}{filename}");
MessageInfo msg = NpoiHepler.EntitysToExcel(cellHead, mems, "用户列表", filepath);
if (msg.IsSucceed == false)
{
Alert.ShowInTop("导出失败" + msg.Message, MessageBoxIcon.Error);
return;
}
FileInfo file = new FileInfo(msg.Message);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + filename);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "gb2312");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(filepath);
Response.Flush();
Response.End();
}
/// <summary>
/// 导出
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
protected void Tb1_Export_Click(object sender, EventArgs e)
{
//导出
PageDataBaseInfo pagedata = FUHelper.GridPageData(Grid1, ttbSearch.Text);
pagedata.PageSize = 0;
DataTable dt = Record_WithdrawalService.GetInstance().FindDt(pagedata, "2", RblStatus.selectedValue);
Dictionary<string, string> cellHead = new Dictionary<string, string>();
cellHead["SysNo"] = "系统编号";
cellHead["Mobile"] = "提现账户";
cellHead["StateName"] = "状态";
cellHead["createTime"] = "申请时间";
cellHead["Money"] = "提现金额";
cellHead["Balance"] = "账户余额";
cellHead["Freeze"] = "冻结金额";
cellHead["Remark"] = "备注";
string filename = $"提现记录{DateTime.Now:yyyyMMddHHmmss}.xls";
string filepath = Server.MapPath($"{PageParam.DocumentPath}{filename}");
MessageInfo msg = NpoiHepler.DataTableToExcel(cellHead, dt, "提现记录", filepath);
if (msg.IsSucceed == false)
{
Alert.ShowInTop("导出失败" + msg.Message, MessageBoxIcon.Error);
return;
}
FileInfo file = new FileInfo(msg.Message);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + filename);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "gb2312");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(filepath);
Response.Flush();
Response.End();
}
该文章在 2022/11/25 15:40:49 编辑过 |
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