C#使用Datatable导出Excel
作者:薛定谔家的猫 时间:2022-01-09 14:50:23
本文实例为大家分享了C#使用Datatable导出Excel的具体代码,供大家参考,具体内容如下
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using Newtonsoft.Json;
namespace EasyFrame.Common
{
/// <summary>
///title调用信息
/// </summary>
public class ChartTitle
{
/// <summary>
/// 调用名
/// </summary>
public string CallName { get; set; }
/// <summary>
/// 标头信息
/// </summary>
public List<ChartName> SetNameList { get; set; }
}
public class ChartName
{
/// <summary>
/// 一级标头
/// </summary>
public string Name { get; set; }
/// <summary>
/// 二级标头
/// </summary>
public List<string> ChartChildNameList { get; set; }
}
public class ExcelHelper
{
//
/// <summary>
/// Datatable导出Excel
/// </summary>
/// <param name="dt">数据</param>
/// <param name="list">表头</param>
/// <param name="counts">总条数</param>
/// <param name="filePath">保存地址</param>
/// <returns></returns>
public static MemoryStream WriteExcel(DataTable dt, List<ChartTitle> objlist, string filePath)
{
var list = objlist.FirstOrDefault(a => a.CallName == "ccc").SetNameList;
if (!string.IsNullOrEmpty(filePath) && null != dt && dt.Rows.Count > 0)
{
XSSFWorkbook book = new XSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = book.CreateSheet(dt.TableName);
ICell cell = null;
ICellStyle style = book.CreateCellStyle();
IFont font = book.CreateFont();//创建字体样式
IFont fonts = book.CreateFont();//创建字体样式
IFont fontss = book.CreateFont();//创建字体样式
font.Color = NPOI.HSSF.Util.HSSFColor.Red.Index;//设置字体颜色
ICellStyle styles = book.CreateCellStyle(); //红色
fonts.Color = NPOI.HSSF.Util.HSSFColor.Green.Index;
ICellStyle styless = book.CreateCellStyle(); //绿色
fontss.Color = NPOI.HSSF.Util.HSSFColor.Blue.Index;
ICellStyle stylesss = book.CreateCellStyle(); //蓝色
styless.SetFont(fonts);
styles.SetFont(font);
stylesss.SetFont(fontss);
style.Alignment = HorizontalAlignment.Center;
NPOI.SS.UserModel.IRow row1 = sheet.CreateRow(0);
NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(1);
var row = row1;
int num = 0;//记录列
var d = true;//是否第一次加载到二级表单
#region 创建表头
//两行单列
for (int i = 0; i < list.Count; i++)
{
if (!d)
{
row = row1;
d = true;
}
if (list[i].ChartChildNameList == null)
{
cell = row.CreateCell(num);
sheet.SetColumnWidth(num, 15 * 256);
cell.SetCellValue(list[i].Name);
cell.CellStyle = style;
sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 1, num, num));
num++;
continue;
}
//两行多列
var count = list[i].ChartChildNameList.Count; //列数
cell = row.CreateCell(num);
cell.SetCellValue(list[i].Name);
cell.CellStyle = style;
sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, num, count + num - 1));
if (d)
{
d = false;
row = row2;
}
var t = 0;
var rang = sheet.GetRow(1);
for (int j = 0; j < count; j++)
{
sheet.SetColumnWidth(num + t, 5 * 256);
cell = row.CreateCell(num + t);
cell.SetCellValue(list[i].ChartChildNameList[j]);
cell.CellStyle = style;
t++;
}
num = num + count;
}
#endregion 创建表头
#region 写入数据
int customs = 0;//记录列数
int clouns = 0;//记录行数
filePath = string.Format(filePath, "XXX");
#region 导出操作
var data1 = JsonConvert.DeserializeObject<List<类名>>(dt.Rows[0][0].ToString());
foreach (var item in data1)
{
NPOI.SS.UserModel.IRow rows = sheet.CreateRow(clouns + 2);
customs = 0;
rows.CreateCell(customs).SetCellValue(Convert.ToString(item.No)); customs++;
rows.CreateCell(customs).SetCellValue(Convert.ToString(item.LotteryOpenNo)); customs++;
for (int i = 0; i < item.Wan.Length; i++)
{
if (item.LotteryOpenNo.Split(',')[0] == item.Wan[i].ToString())
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Wan[i]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Wan[i]); customs++;
}
}
for (int j = 0; j < item.Qian.Length; j++)
{
if (item.LotteryOpenNo.Split(',')[1] == item.Qian[j].ToString())
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Qian[j]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Qian[j]); customs++;
}
}
for (int k = 0; k < item.Bai.Length; k++)
{
if (item.LotteryOpenNo.Split(',')[2] == item.Bai[k].ToString())
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Bai[k]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Bai[k]); customs++;
}
}
for (int l = 0; l < item.Shi.Length; l++)
{
if (item.LotteryOpenNo.Split(',')[3] == (item.Shi[l].ToString()))
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Shi[l]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Shi[l]); customs++;
}
}
for (int m = 0; m < item.Ge.Length; m++)
{
if (item.LotteryOpenNo.Split(',')[4] == (item.Ge[m].ToString()))
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Ge[m]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Ge[m]); customs++;
}
}
for (int n = 0; n < item.Fen.Length; n++)
{
if (item.LotteryOpenNo.Contains(item.Fen[n].ToString()))
{
cell = rows.CreateCell(customs);
cell.SetCellValue(item.Fen[n]);
cell.CellStyle = styles;
customs++;
}
else
{
rows.CreateCell(customs).SetCellValue(item.Fen[n]); customs++;
}
}
clouns++;
}
#endregion
#endregion 写入数据
// 写入到客户端
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
book.Write(ms);
using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
book = null;
return ms;
}
}
return null;
}
}
}
来源:https://www.cnblogs.com/yuanzijian-ruiec/archive/2018/10/01/9734280.html
标签:C#,Datatable,Excel
![](/images/zang.png)
![](/images/jiucuo.png)
猜你喜欢
C#中FormClosing与FormClosed的区别详细解析
2023-01-26 16:28:13
Spring Boot 应用的热部署配置方法
2022-03-26 23:36:56
![](https://img.aspxhome.com/file/2023/7/67097_0s.jpg)
Android 媒体库数据更新方法总结
2022-04-24 10:22:17
关于@RequestBody和@RequestParam注解的使用详解
2023-01-20 09:08:20
![](https://img.aspxhome.com/file/2023/4/62654_0s.jpg)
Mybatis图文并茂讲解分页插件
2023-04-11 22:38:44
![](https://img.aspxhome.com/file/2023/6/101936_0s.png)
Java判断变量是否为空问题的方法总结
2023-02-03 12:23:09
C++实现的求解多元一次方程示例
2022-09-26 19:45:47
用Rational Rose逆向工程(java)生成类图(教程和错误解决)
2023-05-20 20:34:14
![](https://img.aspxhome.com/file/2023/3/90983_0s.gif)
解决Java原生压缩组件不支持中文文件名乱码的问题
2021-07-29 22:39:38
Java实战之用Swing实现通讯录管理系统
2021-08-15 08:24:09
![](https://img.aspxhome.com/file/2023/5/71905_0s.jpg)
C#判断一天、一年已经过了百分之多少的方法
2022-07-16 15:23:11
![](https://img.aspxhome.com/file/2023/0/68660_0s.png)
java简单实现用语音读txt文档方法总结
2022-11-10 22:02:54
![](https://img.aspxhome.com/file/2023/1/70491_0s.png)
SpringBoot整合OpenApi的实践
2023-08-03 11:59:55
![](https://img.aspxhome.com/file/2023/8/70578_0s.jpg)
详解Android 获取手机中微信聊天记录方法
2021-10-25 02:32:38
![](https://img.aspxhome.com/file/2023/7/122087_0s.png)
java AOP原理以及实例用法总结
2022-11-05 03:30:41
![](https://img.aspxhome.com/file/2023/4/122024_0s.png)
Java logback日志的简单使用
2023-07-15 01:32:33
Java反射概念与使用实例代码
2022-02-24 23:55:40
在Spring环境中正确关闭线程池的姿势
2023-11-25 08:07:29
![](https://img.aspxhome.com/file/2023/1/60151_0s.png)
springboot整合spring-retry的实现示例
2022-01-13 01:25:53
![](https://img.aspxhome.com/file/2023/0/80170_0s.png)
Java动态代 理分析及简单实例
2023-11-24 21:14:56