nopi导出
1、NPOI官方网站:http://npoi.codeplex.com/
可以到此网站上去下载最新的NPOI组件版本
2、NPOI在线学习教程(中文版):
http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html
感谢Tony Qu分享出NPOI组件的使用方法
3、.NET调用NPOI组件导入导出Excel的操作类
此NPOI操作类的优点如下:
(1)支持web及winform从DataTable导出到Excel;
(2)生成速度很快;
(3)准确判断数据类型,不会出现身份证转数值等问题;
(4)如果单页条数大于65535时会新建工作表;
(5)列宽自适应;
NPOI操作类 Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
using System.Text;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.Util;
namespace PMS.Common
{
public class NPOIHelper
{
/// <summary>
/// DataTable导出到Excel文件
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">保存位置</param>
public static void Export(DataTable dtSource, string strHeaderText, string strFileName)
{
using (MemoryStream ms = Export(dtSource, strHeaderText))
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, , data.Length);
fs.Flush();
}
}
} /// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
public static MemoryStream Export(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = 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 = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion HSSFCellStyle dateStyle = workbook.CreateCellStyle();
HSSFDataFormat format = workbook.CreateDataFormat();
dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd"); //取得列宽
int[] arrColWidth = new int[dtSource.Columns.Count];
foreach (DataColumn item in dtSource.Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding().GetBytes(item.ColumnName.ToString()).Length;
}
for (int i = ; i < dtSource.Rows.Count; i++)
{
for (int j = ; j < dtSource.Columns.Count; j++)
{
int intTemp = Encoding.GetEncoding().GetBytes(dtSource.Rows[i][j].ToString()).Length;
if (intTemp > arrColWidth[j])
{
arrColWidth[j] = intTemp;
}
}
}
int rowIndex = ;
foreach (DataRow row in dtSource.Rows)
{
#region 新建表,填充表头,填充列头,样式
if (rowIndex == || rowIndex == )
{
if (rowIndex != )
{
sheet = workbook.CreateSheet();
} #region 表头及样式
{
HSSFRow headerRow = sheet.CreateRow();
headerRow.HeightInPoints = ;
headerRow.CreateCell().SetCellValue(strHeaderText); HSSFCellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont();
font.FontHeightInPoints = ;
font.Boldweight = ;
headStyle.SetFont(font);
headerRow.GetCell().CellStyle = headStyle;
sheet.AddMergedRegion(new Region(, , , dtSource.Columns.Count - ));
headerRow.Dispose();
}
#endregion #region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow();
HSSFCellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont();
font.FontHeightInPoints = ;
font.Boldweight = ;
headStyle.SetFont(font);
foreach (DataColumn column in dtSource.Columns)
{
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
headerRow.GetCell(column.Ordinal).CellStyle = headStyle; //设置列宽
sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + ) * );
}
headerRow.Dispose();
}
#endregion rowIndex = ;
}
#endregion #region 填充内容
HSSFRow dataRow = sheet.CreateRow(rowIndex);
foreach (DataColumn column in dtSource.Columns)
{
HSSFCell newCell = dataRow.CreateCell(column.Ordinal); string drValue = row[column].ToString(); switch (column.DataType.ToString())
{
case "System.String"://字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime"://日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV); newCell.CellStyle = dateStyle;//格式化显示
break;
case "System.Boolean"://布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16"://整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = ;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal"://浮点型
case "System.Double":
double doubV = ;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull"://空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
} }
#endregion rowIndex++;
}
using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = ; 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;
}
} /// <summary>
/// 用于Web导出
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">文件名</param>
public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName)
{
HttpContext curContext = HttpContext.Current; // 设置编码和附件格式
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = Encoding.UTF8;
curContext.Response.Charset = "";
curContext.Response.AppendHeader("Content-Disposition",
"attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8)); curContext.Response.BinaryWrite(Export(dtSource, strHeaderText).GetBuffer());
curContext.Response.End();
} /// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="strFileName">excel文档路径</param>
/// <returns></returns>
public static DataTable Import(string strFileName)
{
DataTable dt = new DataTable(); HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
HSSFSheet sheet = hssfworkbook.GetSheetAt();
System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); HSSFRow headerRow = sheet.GetRow();
int cellCount = headerRow.LastCellNum; for (int j = ; j < cellCount; j++)
{
HSSFCell cell = headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
} for (int i = (sheet.FirstRowNum + ); i <= sheet.LastRowNum; i++)
{
HSSFRow row = 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);
}
return dt;
}
}
}
参考1
public void Export()
{
string filename = Request["searchString"]; Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", filename+ ".xlsx")); NPOI.XSSF.UserModel.XSSFWorkbook workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet1 = workbook.CreateSheet("BOM详情"); //给sheet1添加第一行的头部标题
NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();
row1.CreateCell().SetCellValue("物料编码");
row1.CreateCell().SetCellValue("物料名称");
row1.CreateCell().SetCellValue("规格型号");
row1.CreateCell().SetCellValue("物料用量");
row1.CreateCell().SetCellValue("用量单位");
row1.CreateCell().SetCellValue("备注");
//将数据逐步写入sheet1各个行
List<AkBom> pageResult = _akBomRepository.GetPageList(, , Request["searchString"], "");
for (int i = ; i < pageResult.Count; i++)
{
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + );
rowtemp.CreateCell().SetCellValue(pageResult[i].ChildNumber);
rowtemp.CreateCell().SetCellValue(pageResult[i].ChildName);
rowtemp.CreateCell().SetCellValue(pageResult[i].Spec);
rowtemp.CreateCell().SetCellValue(double.Parse(pageResult[i].MaterialSum.ToString()));
rowtemp.CreateCell().SetCellValue(pageResult[i].Unit);
rowtemp.CreateCell().SetCellValue(pageResult[i].Remark);
}
//写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
workbook.Write(ms);
Response.BinaryWrite(ms.ToArray()); Response.Flush();
Response.End();
}
参考3
public void Export()
{
string searchString = Request["searchString"];
string line = Request["line"];
string station = Request["station"];
string begin = Request["begin"];
string end = Request["end"]; Response.Clear();
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", "FQC.xlsx")); NPOI.XSSF.UserModel.XSSFWorkbook workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet1 = workbook.CreateSheet("FQC"); //excel格式化
NPOI.SS.UserModel.ICellStyle dateStyle = workbook.CreateCellStyle();
dateStyle.DataFormat = workbook.CreateDataFormat().GetFormat("yyyy/m/d h:mm:ss"); NPOI.SS.UserModel.ICellStyle numberStyle = workbook.CreateCellStyle();
numberStyle.DataFormat = workbook.CreateDataFormat().GetFormat("0.00000"); NPOI.SS.UserModel.ICellStyle textStyle = workbook.CreateCellStyle();
textStyle.DataFormat = workbook.CreateDataFormat().GetFormat("@"); //给sheet1添加第一行的头部标题
NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();
row1.CreateCell().SetCellValue("订单号");
row1.CreateCell().SetCellValue("条码");
row1.CreateCell().SetCellValue("档位名称");
row1.CreateCell().SetCellValue("Pmax");
row1.CreateCell().SetCellValue("功率档");
row1.CreateCell().SetCellValue("功率档范围");
row1.CreateCell().SetCellValue("Ipm");
row1.CreateCell().SetCellValue("电流档");
row1.CreateCell().SetCellValue("电流档范围");
row1.CreateCell().SetCellValue("规格");
row1.CreateCell().SetCellValue("产品等级");
row1.CreateCell().SetCellValue("电池片等级");
row1.CreateCell().SetCellValue("FQC不良");
row1.CreateCell().SetCellValue("判定结果");
row1.CreateCell().SetCellValue("人员");
row1.CreateCell().SetCellValue("线别");
row1.CreateCell().SetCellValue("工位");
row1.CreateCell().SetCellValue("备注");
row1.CreateCell().SetCellValue("扫描时间");
row1.CreateCell().SetCellValue("输入时间");
row1.CreateCell().SetCellValue("Eff");
row1.CreateCell().SetCellValue("Isc");
row1.CreateCell().SetCellValue("Voc");
row1.CreateCell().SetCellValue("Rs");
row1.CreateCell().SetCellValue("Rsh");
row1.CreateCell().SetCellValue("Vpm");
row1.CreateCell().SetCellValue("FF");
row1.CreateCell().SetCellValue("Sun");
row1.CreateCell().SetCellValue("Temp");
row1.CreateCell().SetCellValue("Class");
//将数据逐步写入sheet1各个行
string strSql = "where AkFqc.BarCode like '%@param%' and (AkFqc.DateTime between '@begin' and '@end') and AkFqc.LineTitle like '%@line%' and AkFqc.StationTitle like '%@station%'";
strSql = strSql.Replace("@param", searchString);
strSql = strSql.Replace("@begin", begin);
strSql = strSql.Replace("@end", end);
strSql = strSql.Replace("@line", line);
strSql = strSql.Replace("@station", station); List<AkFqc> pageResult = _akFqcRepository.GetPageList(, , strSql, "order by AkFqc.Id desc");
for (int i = ; i < pageResult.Count; i++)
{
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + ); rowtemp.CreateCell().SetCellValue(pageResult[i].OrderNumber);
rowtemp.CreateCell().SetCellValue(pageResult[i].BarCode);
rowtemp.CreateCell().SetCellValue(pageResult[i].Title);
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Pmax)));
rowtemp.CreateCell().SetCellValue(pageResult[i].PTitle);
rowtemp.CreateCell().SetCellValue(pageResult[i].PScope);
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Ipm)));
rowtemp.CreateCell().SetCellValue(pageResult[i].ITitle);
rowtemp.CreateCell().SetCellValue(pageResult[i].IScope);
rowtemp.CreateCell().SetCellValue(pageResult[i].Spec);
rowtemp.CreateCell().SetCellValue(pageResult[i].ProductLevel);
rowtemp.CreateCell().SetCellValue(pageResult[i].BatteryLevel);
rowtemp.CreateCell().SetCellValue(pageResult[i].BadReason);
rowtemp.CreateCell().SetCellValue(pageResult[i].JudgeResult);
rowtemp.CreateCell().SetCellValue(pageResult[i].Employee);
rowtemp.CreateCell().SetCellValue(pageResult[i].LineTitle);
rowtemp.CreateCell().SetCellValue(pageResult[i].StationTitle);
rowtemp.CreateCell().SetCellValue(pageResult[i].Remark);
rowtemp.CreateCell().SetCellValue(pageResult[i].DateTime);
rowtemp.CreateCell().SetCellValue(pageResult[i].ScanDate);
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Eff)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Isc)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Voc)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rs)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rsh)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Vpm)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].FF)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Sun)));
rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Temp)));
rowtemp.CreateCell().SetCellValue(pageResult[i].Class); rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = textStyle;
rowtemp.GetCell().CellStyle = dateStyle;
rowtemp.GetCell().CellStyle = dateStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = numberStyle;
rowtemp.GetCell().CellStyle = textStyle;
}
//写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
workbook.Write(ms);
Response.BinaryWrite(ms.ToArray()); Response.Flush();
Response.End();
}
NPOI操作类
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
using System.Text;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.Util;
namespace PMS.Common
{
public class NPOIHelper
{
/// <summary>
/// DataTable导出到Excel文件
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">保存位置</param>
public static void Export(DataTable dtSource, string strHeaderText, string strFileName)
{
using (MemoryStream ms = Export(dtSource, strHeaderText))
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
}
}
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
public static MemoryStream Export(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = 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 = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
HSSFCellStyle dateStyle = workbook.CreateCellStyle();
HSSFDataFormat format = workbook.CreateDataFormat();
dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
//取得列宽
int[] arrColWidth = new int[dtSource.Columns.Count];
foreach (DataColumn item in dtSource.Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
}
for (int i = 0; i < dtSource.Rows.Count; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
if (intTemp > arrColWidth[j])
{
arrColWidth[j] = intTemp;
}
}
}
int rowIndex = 0;
foreach (DataRow row in dtSource.Rows)
{
#region 新建表,填充表头,填充列头,样式
if (rowIndex == 65535 || rowIndex == 0)
{
if (rowIndex != 0)
{
sheet = workbook.CreateSheet();
}
#region 表头及样式
{
HSSFRow headerRow = sheet.CreateRow(0);
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
HSSFCellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont();
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
headerRow.Dispose();
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow(1);
HSSFCellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
foreach (DataColumn column in dtSource.Columns)
{
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
//设置列宽
sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
}
headerRow.Dispose();
}
#endregion
rowIndex = 2;
}
#endregion
#region 填充内容
HSSFRow dataRow = sheet.CreateRow(rowIndex);
foreach (DataColumn column in dtSource.Columns)
{
HSSFCell newCell = dataRow.CreateCell(column.Ordinal);
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String"://字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime"://日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV);
newCell.CellStyle = dateStyle;//格式化显示
break;
case "System.Boolean"://布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16"://整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal"://浮点型
case "System.Double":
double doubV = 0;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull"://空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}
}
#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;
}
}
/// <summary>
/// 用于Web导出
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">文件名</param>
public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName)
{
HttpContext curContext = HttpContext.Current;
// 设置编码和附件格式
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = Encoding.UTF8;
curContext.Response.Charset = "";
curContext.Response.AppendHeader("Content-Disposition",
"attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8));
curContext.Response.BinaryWrite(Export(dtSource, strHeaderText).GetBuffer());
curContext.Response.End();
}
/// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="strFileName">excel文档路径</param>
/// <returns></returns>
public static DataTable Import(string strFileName)
{
DataTable dt = new DataTable();
HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
HSSFSheet sheet = hssfworkbook.GetSheetAt(0);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
HSSFRow headerRow = sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;
for (int j = 0; j < cellCount; j++)
{
HSSFCell cell = headerRow.GetCell(j);
dt.Columns.Add(cell.ToString());
}
for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
{
HSSFRow row = 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);
}
return dt;
}
}
}
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