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, 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; } } }
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(0); row1.CreateCell(0).SetCellValue("物料编码"); row1.CreateCell(1).SetCellValue("物料名称"); row1.CreateCell(2).SetCellValue("规格型号"); row1.CreateCell(3).SetCellValue("物料用量"); row1.CreateCell(4).SetCellValue("用量单位"); row1.CreateCell(5).SetCellValue("备注"); //将数据逐步写入sheet1各个行 List<AkBom> pageResult = _akBomRepository.GetPageList(0, 10000, Request["searchString"], ""); for (int i = 0; i < pageResult.Count; i++) { NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1); rowtemp.CreateCell(0).SetCellValue(pageResult[i].ChildNumber); rowtemp.CreateCell(1).SetCellValue(pageResult[i].ChildName); rowtemp.CreateCell(2).SetCellValue(pageResult[i].Spec); rowtemp.CreateCell(3).SetCellValue(double.Parse(pageResult[i].MaterialSum.ToString())); rowtemp.CreateCell(4).SetCellValue(pageResult[i].Unit); rowtemp.CreateCell(5).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(0); row1.CreateCell(0).SetCellValue("订单号"); row1.CreateCell(1).SetCellValue("条码"); row1.CreateCell(2).SetCellValue("档位名称"); row1.CreateCell(3).SetCellValue("Pmax"); row1.CreateCell(4).SetCellValue("功率档"); row1.CreateCell(5).SetCellValue("功率档范围"); row1.CreateCell(6).SetCellValue("Ipm"); row1.CreateCell(7).SetCellValue("电流档"); row1.CreateCell(8).SetCellValue("电流档范围"); row1.CreateCell(9).SetCellValue("规格"); row1.CreateCell(10).SetCellValue("产品等级"); row1.CreateCell(11).SetCellValue("电池片等级"); row1.CreateCell(12).SetCellValue("FQC不良"); row1.CreateCell(13).SetCellValue("判定结果"); row1.CreateCell(14).SetCellValue("人员"); row1.CreateCell(15).SetCellValue("线别"); row1.CreateCell(16).SetCellValue("工位"); row1.CreateCell(17).SetCellValue("备注"); row1.CreateCell(18).SetCellValue("扫描时间"); row1.CreateCell(19).SetCellValue("输入时间"); row1.CreateCell(20).SetCellValue("Eff"); row1.CreateCell(21).SetCellValue("Isc"); row1.CreateCell(22).SetCellValue("Voc"); row1.CreateCell(23).SetCellValue("Rs"); row1.CreateCell(24).SetCellValue("Rsh"); row1.CreateCell(25).SetCellValue("Vpm"); row1.CreateCell(26).SetCellValue("FF"); row1.CreateCell(27).SetCellValue("Sun"); row1.CreateCell(28).SetCellValue("Temp"); row1.CreateCell(29).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(0, 100000, strSql, "order by AkFqc.Id desc"); for (int i = 0; i < pageResult.Count; i++) { NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1); rowtemp.CreateCell(0).SetCellValue(pageResult[i].OrderNumber); rowtemp.CreateCell(1).SetCellValue(pageResult[i].BarCode); rowtemp.CreateCell(2).SetCellValue(pageResult[i].Title); rowtemp.CreateCell(3).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Pmax))); rowtemp.CreateCell(4).SetCellValue(pageResult[i].PTitle); rowtemp.CreateCell(5).SetCellValue(pageResult[i].PScope); rowtemp.CreateCell(6).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Ipm))); rowtemp.CreateCell(7).SetCellValue(pageResult[i].ITitle); rowtemp.CreateCell(8).SetCellValue(pageResult[i].IScope); rowtemp.CreateCell(9).SetCellValue(pageResult[i].Spec); rowtemp.CreateCell(10).SetCellValue(pageResult[i].ProductLevel); rowtemp.CreateCell(11).SetCellValue(pageResult[i].BatteryLevel); rowtemp.CreateCell(12).SetCellValue(pageResult[i].BadReason); rowtemp.CreateCell(13).SetCellValue(pageResult[i].JudgeResult); rowtemp.CreateCell(14).SetCellValue(pageResult[i].Employee); rowtemp.CreateCell(15).SetCellValue(pageResult[i].LineTitle); rowtemp.CreateCell(16).SetCellValue(pageResult[i].StationTitle); rowtemp.CreateCell(17).SetCellValue(pageResult[i].Remark); rowtemp.CreateCell(18).SetCellValue(pageResult[i].DateTime); rowtemp.CreateCell(19).SetCellValue(pageResult[i].ScanDate); rowtemp.CreateCell(20).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Eff))); rowtemp.CreateCell(21).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Isc))); rowtemp.CreateCell(22).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Voc))); rowtemp.CreateCell(23).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rs))); rowtemp.CreateCell(24).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rsh))); rowtemp.CreateCell(25).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Vpm))); rowtemp.CreateCell(26).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].FF))); rowtemp.CreateCell(27).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Sun))); rowtemp.CreateCell(28).SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Temp))); rowtemp.CreateCell(29).SetCellValue(pageResult[i].Class); rowtemp.GetCell(0).CellStyle = textStyle; rowtemp.GetCell(1).CellStyle = textStyle; rowtemp.GetCell(2).CellStyle = textStyle; rowtemp.GetCell(3).CellStyle = numberStyle; rowtemp.GetCell(4).CellStyle = textStyle; rowtemp.GetCell(5).CellStyle = textStyle; rowtemp.GetCell(6).CellStyle = numberStyle; rowtemp.GetCell(7).CellStyle = textStyle; rowtemp.GetCell(8).CellStyle = textStyle; rowtemp.GetCell(9).CellStyle = textStyle; rowtemp.GetCell(10).CellStyle = textStyle; rowtemp.GetCell(11).CellStyle = textStyle; rowtemp.GetCell(12).CellStyle = textStyle; rowtemp.GetCell(13).CellStyle = textStyle; rowtemp.GetCell(14).CellStyle = textStyle; rowtemp.GetCell(15).CellStyle = textStyle; rowtemp.GetCell(16).CellStyle = textStyle; rowtemp.GetCell(17).CellStyle = textStyle; rowtemp.GetCell(18).CellStyle = dateStyle; rowtemp.GetCell(19).CellStyle = dateStyle; rowtemp.GetCell(20).CellStyle = numberStyle; rowtemp.GetCell(21).CellStyle = numberStyle; rowtemp.GetCell(22).CellStyle = numberStyle; rowtemp.GetCell(23).CellStyle = numberStyle; rowtemp.GetCell(24).CellStyle = numberStyle; rowtemp.GetCell(25).CellStyle = numberStyle; rowtemp.GetCell(26).CellStyle = numberStyle; rowtemp.GetCell(27).CellStyle = numberStyle; rowtemp.GetCell(28).CellStyle = numberStyle; rowtemp.GetCell(29).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;
}
}
}
