c# Excel数据的导出与导入
搬运:Datagrideview 数据导出Excel , Exel数据导入
//-------------------------------------------------------------------------------------
// All Rights Reserved , Copyright (C) 2013 , DZD , Ltd .
//-------------------------------------------------------------------------------------
using System;
using System.Data;
using System.Data.OleDb;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Windows.Forms;
using NPOI.HPSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
namespace LineSet
{
///
/// Excel操作类，这里的NPOI使用的是2.0.1 (beta1)版本的
///
/// 修改纪录
///
/// 2013-10-25 版本：1.0 yanghenglian 创建主键，注意命名空间的排序。
/// 2013-11-01 版本：1.0 yanghenglian 添加了支持B/S的导出和导入以及C/S的导出和导入功能，代码感觉可以在优化，开心。
/// 2014-01-16 版本：1.0 yanghenglian 添加了支持xlsxExcel文件读取判断
///
/// 版本：1.0
///
///
/// yanghenglian
/// 2013-11-01
///
///
public class ExcelHelper
{
private static HSSFWorkbook _hssfworkbook;
public static string EroMsg = "";
/********************************************************下面的五个是最终版本适合B/S和C/S*****************************************************/
#region ExcelToDataTable(string strExcelFileName, string strSheetName) Excel转换成DataTable--B/S和C/S都可以使用
///
/// Excel转换成DataTable
///
/// 文件路径
/// Excel中对应的sheet表单名称,如:sheet1,sheet2
/// 数据集
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2100:检查 SQL 查询是否存在安全漏洞")]
public static DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + strExcelFileName + ";" +
"Extended Properties=Excel 5.0;";
string strExcel = string.Format("select * from [{0}$]", strSheetName);
DataSet ds = new DataSet();
using (OleDbConnection conn = new OleDbConnection(strConn))
{
conn.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);
adapter.Fill(ds, strSheetName);
conn.Close();
return ds.Tables[strSheetName];
}
}
#endregion
#region DataTable ExcelToDataTable(string strFileName, int sheetIndex = 0) 根据索引读取Sheet表数据，默认读取第一个sheet--B/S和C/S都可以使用
/// 读取excel
/// 根据索引读取Sheet表数据，默认读取第一个sheet
///
/// excel文档路径
/// sheet表的索引，从0开始
/// 数据集
public static DataTable ExcelToDataTable(string strFileName, int sheetIndex = 0)
{
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook = null;
XSSFWorkbook xssfworkbook = null;
string fileExt = Path.GetExtension(strFileName);//获取文件的后缀名
try
{
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
if (fileExt.ToLower() == ".xls")
hssfworkbook = new HSSFWorkbook(file);
else if (fileExt.ToLower() == ".xlsx")
xssfworkbook = new XSSFWorkbook(file);//初始化太慢了，不知道这是什么bug
}
}
catch (Exception ex)
{
EroMsg = ex.Message;
return null;
}
if (hssfworkbook != null)
{
HSSFSheet sheet = (HSSFSheet)hssfworkbook.GetSheetAt(sheetIndex);
if (sheet != null)
{
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = (HSSFCell)headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = (HSSFRow)sheet.GetRow(i);
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
}
}
else if (xssfworkbook != null)
{
XSSFSheet xSheet = (XSSFSheet)xssfworkbook.GetSheetAt(sheetIndex);
if (xSheet != null)
{
System.Collections.IEnumerator rows = xSheet.GetRowEnumerator();
XSSFRow headerRow = (XSSFRow)xSheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
XSSFCell cell = (XSSFCell)headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (xSheet.FirstRowNum + 1); i <= xSheet.LastRowNum; i++)
{
XSSFRow row = (XSSFRow)xSheet.GetRow(i);
DataRow dataRow = dt.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
dt.Rows.Add(dataRow);
}
}
}
return dt;
}
#endregion
#region DataGridViewToExcel(DataGridView myDgv, string strHeaderText, string strFileName) DataGridView导出到Excel文件--C/S
///
/// C/S Winform中DataGridView导出数据到Excel
///
/// DataGridView控件名称
/// 保存的文件名称，默认没有，调用的时候最好加上，中英文都支持
/// 导出后是否打开文件和所在文件夹
/// 默认保存在“我的文档”中，可自定义保存的文件夹路径
/// Excel中第一行的标题文字，默认没有，可以自定义
/// Excel中列名的数组，默认绑定GridView的列名
public static void DataGridViewToExcel(DataGridView myDgv, string saveFileName = null, bool isOpen = false,
string saveFilePath = null, string strHeaderText = null, string[] titleNames = null)
{
string na = saveFileName.Split('.')[0];
string kzm = saveFileName.Split('.')[1];
using (MemoryStream ms = DataGridViewToExcel(myDgv, strHeaderText, titleNames))
{
if (string.IsNullOrEmpty(saveFileName)) //文件名为空
{
saveFileName = DateTime.Now.Ticks.ToString();
}
if (string.IsNullOrEmpty(saveFilePath) || !System.IO.Directory.Exists(saveFilePath)) //保存路径为空或者不存在
{
saveFilePath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments); //默认在文档文件夹中
}
string saveFullPath = saveFilePath + "\\" + saveFileName;
//if (System.IO.File.Exists(saveFullPath)) //验证文件重复性
//{
// saveFullPath = saveFilePath + "\\" + na +DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss").Replace(":", "-").Replace(" ", "-") +"."+ kzm;
//}
using (FileStream fs = new FileStream(saveFullPath, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
if (isOpen)
{
Process.Start(saveFullPath); //打开文件
Process.Start(saveFilePath); //打开文件夹
}
}
}
#endregion
/********************************************************分割线往下方法不用与导入导出*********************************************************/
#region DataGridViewToExcel(DataGridView myDgv, string strHeaderText) DataTable导出到Excel的MemoryStream
///
/// DataTable导出到Excel的MemoryStream
///
/// DataGridView控件名称
/// 第一行标题头
/// 列名称数组
/// 内存流
private static MemoryStream DataGridViewToExcel(DataGridView myDgv, string strHeaderText = null,
string[] titleNames = null)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet();
#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI";
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "文件作者信息"; //填加xls文件作者信息
si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
si.Comments = "作者信息"; //填加xls文件作者信息
si.Title = "标题信息"; //填加xls文件标题信息
si.Subject = "主题信息"; //填加文件主题信息
si.CreateDateTime = System.DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
HSSFCellStyle dateStyle = (HSSFCellStyle)workbook.CreateCellStyle();
HSSFDataFormat format = (HSSFDataFormat)workbook.CreateDataFormat();
dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
//取得列宽
int id = 0;
foreach (DataGridViewColumn item in myDgv.Columns)
{
if (item.Visible == true)
{
id++;
}
}
int[] arrColWidth = new int[id];
id = 0;
foreach (DataGridViewColumn item in myDgv.Columns)
{
if (item.Visible == true)
{
arrColWidth[id] = Encoding.GetEncoding(936).GetBytes(item.HeaderText).Length;
id++;
}
}
for (int i = 0; i < myDgv.Rows.Count; i++)
{
id = 0;
for (int j = 0; j < myDgv.Columns.Count; j++)
{
if (myDgv.Columns[j].Visible == true)
{
int intTemp = Encoding.GetEncoding(936).GetBytes(myDgv.Rows[i].Cells[j].ToString()).Length;
if (intTemp > arrColWidth[id])
{
arrColWidth[id] = intTemp;
}
id++;
}
}
}
int rowIndex = 0;
foreach (DataGridViewRow row in myDgv.Rows)
{
#region 新建表，填充表头，填充列头，样式
if (rowIndex == 65535 || rowIndex == 0)
{
if (rowIndex != 0)
{
sheet = (HSSFSheet)workbook.CreateSheet();
}
#region 表头及样式
{
if (!string.IsNullOrEmpty(strHeaderText))
{
HSSFRow headerRow = (HSSFRow)sheet.CreateRow(0);
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();
// headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = (HSSFFont)workbook.CreateFont();
font.FontHeightInPoints = 20;
font.IsBold = true;
font.FontName = "宋体";
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
// sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
//headerRow.Dispose();
rowIndex++;
}
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = (HSSFRow)sheet.CreateRow(rowIndex);
HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();
// headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = (HSSFFont)workbook.CreateFont();
font.FontHeightInPoints = 14;
font.IsBold = true;
font.FontName = "宋体";
headStyle.SetFont(font);
if (titleNames != null)
{
if (titleNames.Length > 0)
{
for (int i = 0; i < titleNames.Length; i++)
{
headerRow.CreateCell(i).SetCellValue(titleNames[i]);
headerRow.GetCell(i).CellStyle = headStyle;
//设置列宽
sheet.SetColumnWidth(i, (arrColWidth[i] + 1) * 100);
}
}
}
else
{
id = 0;
foreach (DataGridViewColumn column in myDgv.Columns)
{
if (column.Visible)
{
headerRow.CreateCell(id).SetCellValue(column.HeaderText);
headerRow.GetCell(id).CellStyle = headStyle;
//设置列宽
sheet.SetColumnWidth(id, (arrColWidth[id] + 1) * 100);
id++;
}
}
}
rowIndex++;
// headerRow.Dispose();
}
#endregion
}
#endregion
#region 填充内容
HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex);
if (row.Index >= 0)
{
bool rel = false;
id = 0;
foreach (DataGridViewColumn column in myDgv.Columns)
{
if (column.Visible)
{
HSSFCell newCell = (HSSFCell)dataRow.CreateCell(id);
string drValue = "";
if (myDgv.Rows[row.Index].Cells[column.Index].Value != null)
{
drValue = myDgv.Rows[row.Index].Cells[column.Index].Value.ToString();
}
string type = "System.String";
if (column.ValueType != null)
{
type = column.ValueType.ToString();
}
switch (type)
{
case "System.String": //字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime": //日期类型
System.DateTime dateV;
rel = System.DateTime.TryParse(drValue, out dateV);
if (rel)
{
newCell.SetCellValue(dateV);
}
else
{
newCell.SetCellValue("");
}
newCell.CellStyle = dateStyle; //格式化显示
break;
case "System.Boolean": //布尔型
bool boolV = false;
rel = bool.TryParse(drValue, out boolV);
if (rel)
{
newCell.SetCellValue(boolV);
}
else
{
newCell.SetCellValue("");
}
break;
case "System.Int16": //整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
rel = int.TryParse(drValue, out intV);
if (rel)
{
newCell.SetCellValue(intV);
}
else
{
newCell.SetCellValue("");
}
break;
case "System.Decimal": //浮点型
case "System.Double":
double doubV = 0;
rel = double.TryParse(drValue, out doubV);
if (rel)
{
newCell.SetCellValue(doubV);
}
else
{
newCell.SetCellValue("");
}
break;
case "System.DBNull": //空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}
id++;
}
}
}
else
{
rowIndex--;
}
#endregion
rowIndex++;
}
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
// sheet.Dispose();
//workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
return ms;
}
}
#endregion
#region GetExcelStream() 工作簿中的数据流写入到根目录
///
/// 写入到内存流中
///
///
/// 构建数据集，每一个Sheet表
///
/// 数据源
/// 列名
/// 第一行显示标题
/// 需要创建的表的名称，默认是Sheet1
/// 是否打开文件
private static void GenerateData(DataTable sourceDt, string[] titleNames, string strHeadName,
string sheetName = "Sheet1")
{
ISheet sheet1 = _hssfworkbook.CreateSheet(sheetName);
int rowIndex = 0;
if (!string.IsNullOrEmpty(strHeadName)) //头部大标题
{
sheet1.CreateRow(rowIndex).CreateCell(0).SetCellValue(strHeadName);
rowIndex++;
}
IRow rowSecond = sheet1.CreateRow(rowIndex);
if (titleNames != null) //构建自定义列标题
{
if (titleNames.Length > 0)
{
for (int k = 0; k < titleNames.Length; k++)
{
var cell = rowSecond.CreateCell(k);
cell.SetCellValue(titleNames[k]);
cell.CellStyle = Getcellstyle(_hssfworkbook, stylexls.头);
}
rowIndex++;
}
}
else //构建DataTable的列标题
{
if (sourceDt.Columns.Count > 0)
{
for (int i = 0; i < sourceDt.Columns.Count; i++)
{
var cell = rowSecond.CreateCell(i);
cell.SetCellValue(sourceDt.Columns[i].ColumnName);
cell.CellStyle = Getcellstyle(_hssfworkbook, stylexls.头);
}
rowIndex++;
}
}
if (sourceDt != null && sourceDt.Rows.Count > 0)
{
for (int i = 0; i < sourceDt.Rows.Count; i++)
{
IRow row = sheet1.CreateRow(rowIndex++);
for (int j = 0; j < sourceDt.Columns.Count; j++)
{
row.CreateCell(j).SetCellValue(sourceDt.Rows[i][j].ToString());
}
}
}
}
#endregion
#region InitializeWorkbook() 导出文件的属性详细信息
///
/// 导出文件的属性详细信息
///
private static void InitializeWorkbook()
{
_hssfworkbook = new HSSFWorkbook();
#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "DZD";
_hssfworkbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "文件作者信息"; //填加xls文件作者信息
si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
si.Comments = "作者信息"; //填加xls文件作者信息
si.Title = "标题信息"; //填加xls文件标题信息
si.Subject = "主题信息"; //填加文件主题信息
si.CreateDateTime = DateTime.Now;
_hssfworkbook.SummaryInformation = si;
}
#endregion
}
#endregion
#region 定义单元格常用到样式
private static ICellStyle Getcellstyle(IWorkbook wb, stylexls str)
{
ICellStyle cellStyle = wb.CreateCellStyle();
//定义几种字体
//也可以一种字体，写一些公共属性，然后在下面需要时加特殊的
IFont font12 = wb.CreateFont();
font12.FontHeightInPoints = 14;
font12.FontName = "宋体";
IFont font = wb.CreateFont();
font.FontName = "宋体";
//font.Underline = 1;下划线
IFont fontcolorblue = wb.CreateFont();
fontcolorblue.Color = HSSFColor.OliveGreen.Blue.Index;
fontcolorblue.IsItalic = true; //下划线
fontcolorblue.FontName = "宋体";
//边框
cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Dotted;
cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Hair;
cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Hair;
cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Dotted;
//边框颜色
cellStyle.BottomBorderColor = HSSFColor.OliveGreen.Blue.Index;
cellStyle.TopBorderColor = HSSFColor.OliveGreen.Blue.Index;
//背景图形，我没有用到过。感觉很丑
// cellStyle.FillBackgroundColor = HSSFColor.OLIVE_GREEN.GREEN.index;
//cellStyle.FillForegroundColor = HSSFColor.OLIVE_GREEN.BLUE.index;
// cellStyle.FillForegroundColor = HSSFColor.WHITE.index;
// cellStyle.FillPattern = FillPatternType.NO_FILL;
cellStyle.FillBackgroundColor = HSSFColor.Maroon.Index;
//水平对齐
cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Left;
//垂直对齐
cellStyle.VerticalAlignment = VerticalAlignment.Center;
//自动换行
// cellStyle.WrapText = true;
//缩进;当设置为1时，前面留的空白太大了。希旺官网改进。或者是我设置的不对
cellStyle.Indention = 0;
//上面基本都是设共公的设置
//下面列出了常用的字段类型
switch (str)
{
case stylexls.头:
// cellStyle.FillPattern = FillPatternType.LEAST_DOTS;
cellStyle.SetFont(font12);
break;
case stylexls.时间:
IDataFormat datastyle = wb.CreateDataFormat();
cellStyle.DataFormat = datastyle.GetFormat("yyyy/mm/dd");
cellStyle.SetFont(font);
break;
case stylexls.数字:
cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00");
cellStyle.SetFont(font);
break;
case stylexls.钱:
IDataFormat format = wb.CreateDataFormat();
cellStyle.DataFormat = format.GetFormat("￥#,##0");
cellStyle.SetFont(font);
break;
case stylexls.url:
fontcolorblue.Underline = FontUnderlineType.Single;
cellStyle.SetFont(fontcolorblue);
break;
case stylexls.百分比:
cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00%");
cellStyle.SetFont(font);
break;
case stylexls.中文大写:
IDataFormat format1 = wb.CreateDataFormat();
cellStyle.DataFormat = format1.GetFormat("[DbNum2][$-804]0");
cellStyle.SetFont(font);
break;
case stylexls.科学计数法:
cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("0.00E+00");
cellStyle.SetFont(font);
break;
case stylexls.默认:
cellStyle.SetFont(font);
break;
}
return cellStyle;
}
#endregion
#region 定义单元格常用到样式的枚举
public enum stylexls
{
头,
url,
时间,
数字,
钱,
百分比,
中文大写,
科学计数法,
默认
}
#endregion
}
}
使用的Npoi
需要引用相关的dll文件
使用方法
导出:
private void button3_Click(object sender, EventArgs e)
{
DgvToExcel(dgv_1);
}
private void DgvToExcel(DataGridView dgv)
{
if (dgv.Rows.Count == 0)
{
MessageBox.Show("无可导出信息!");
return;
}
SaveFileDialog ofd = new SaveFileDialog();//;*.xlsx
//打开的文件选择对话框上的标题
ofd.Title = "请选择文件";
//设置文件类型
ofd.Filter = "Excel (*.xls)|*.xls";
//设置默认文件类型显示顺序
ofd.FilterIndex = 1;
//保存对话框是否记忆上次打开的目录
ofd.RestoreDirectory = true;
if (ofd.ShowDialog() == DialogResult.OK)
{
string localFilePath = ofd.FileName.ToString();
string filePath = localFilePath.Substring(0, localFilePath.LastIndexOf("\\"));
string fileName = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);
try
{
ExcelHelper.DataGridViewToExcel(dgv, fileName, false, filePath, null, null);
MessageBox.Show("导出完毕！");
}
catch (Exception ex)
{
MessageBox.Show(@"导出失败！" + ex.ToString());
}
}
}导入:
private void bt_InDate_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "数据文件(CSV,xls,xlsx) |*.CSV;*.xls;*.xlsx";
openFileDialog.RestoreDirectory = true;
openFileDialog.FilterIndex = 1;
openFileDialog.Multiselect = false;
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
string kzm = openFileDialog.SafeFileName.Split('.')[1].ToLower();
if (kzm == "csv")
{
CsvHelp csv = new CsvHelp();
DataTable dt = csv.CSV2DataTable(openFileDialog.FileName, false);
Dgv_2.DataSource = null;
Dgv_2.DataSource = dt;
}
else if (kzm == "xls" || kzm == "xlsx")
{
DataTable dt = ExcelHelper.ExcelToDataTable(openFileDialog.FileName);
if (dt == null)
{
Form1.mt.Show(ExcelHelper.EroMsg, true);
return;
}
Dgv_2.DataSource = null;
Dgv_2.DataSource = dt;
}
}