NPOI、MyXls、Aspose.Cells 导入导出Excel
Excel导入及导出问题产生：
从接触.net到现在一直在维护一个DataTable导s出到Excel的类，时不时还会维护一个导入类。以下是时不时就会出现的问题：
导出问题：
如果是asp.net，你得在服务器端装Office，几百M呢，还得及时更新它，以防漏洞，还得设定权限允许ASP.net访问COM+，听说如果导出过程中出问题可能导致服务器宕机。
Excel会把只包含数字的列进行类型转换，本来是文本型的，它非要把你转成数值型的，像身份证后三位变成000，编号000123会变成123，够智能吧，够郁闷吧。不过这些都还是可以变通解决的，在他们前边加上一个字母，让他们不只包含数字。
导出时，如果你的字段内容以"-"或"="开头，Excel好像把它当成了公式什么的，接下来就出错，提示：类似，保存到Sheet1的问题
导入问题：
Excel会根据你的 Excel文件前8行分析数据类型，如果正好你前8行某一列只是数字，那它会认为你这一列就是数值型的，然后，身份证，手机，编号都转吧变成类似这样的1.42702E+17格式，日期列变成 包含日期和数字的，乱的很，可以通过改注册表让Excel分析整个表，但如果整列都是数字，那这个问题还是解决不了。
以上问题，一般人初次做时肯定得上网查查吧，一个问题接着另一个问题，查到你郁郁而死，还有很多问题没解决，最终感觉已经解决的不错了，但还不能保证某一天还会出个什么问题。
使用第三方开源组件导入及导出Excel的解决方案：
NPOI || MyXls || Aspose.Cells == 研究几年Excel。
NPOI开源地址：http://npoi.codeplex.com/
NPOI中文文档：http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html
MyXls开源地址：http://sourceforge.net/projects/myxls/
Aspose.Cells是个商业软件，下载地址：http://***/zh-CN/product/563/feature_en.aspx
下面来两个简单入门例子：
MyXls 快速入门例子:
- /// <summary>
- /// MyXls简单Demo，快速入门代码
- /// </summary>
- /// <param name="dtSource"></param>
- /// <param name="strFileName"></param>
- /// <remarks>MyXls认为Excel的第一个单元格是：(1,1)</remarks>
- /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
- publicstaticvoid ExportEasy(DataTable dtSource, string strFileName)
- {
- XlsDocument xls = new XlsDocument();
- Worksheet sheet = xls.Workbook.Worksheets.Add("Sheet1");
- //填充表头
- foreach (DataColumn col in dtSource.Columns)
- {
- sheet.Cells.Add(1, col.Ordinal + 1, col.ColumnName);
- }
- //填充内容
- for (int i = 0; i < dtSource.Rows.Count; i++)
- {
- for (int j = 0; j < dtSource.Columns.Count; j++)
- {
- sheet.Cells.Add(i + 2, j + 1, dtSource.Rows[i][j].ToString());
- }
- }
- //保存
- xls.FileName = strFileName;
- xls.Save();
- }
/// <summary>
/// MyXls简单Demo，快速入门代码
/// </summary>
/// <param name="dtSource"></param>
/// <param name="strFileName"></param>
/// <remarks>MyXls认为Excel的第一个单元格是：(1,1)</remarks>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
public static void ExportEasy(DataTable dtSource, string strFileName)
{
XlsDocument xls = new XlsDocument();
Worksheet sheet = xls.Workbook.Worksheets.Add("Sheet1");
//填充表头
foreach (DataColumn col in dtSource.Columns)
{
sheet.Cells.Add(1, col.Ordinal + 1, col.ColumnName);
}
//填充内容
for (int i = 0; i < dtSource.Rows.Count; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
sheet.Cells.Add(i + 2, j + 1, dtSource.Rows[i][j].ToString());
}
}
//保存
xls.FileName = strFileName;
xls.Save();
}
NPOI 快速入门例子:
- /// <summary>
- /// NPOI简单Demo，快速入门代码
- /// </summary>
- /// <param name="dtSource"></param>
- /// <param name="strFileName"></param>
- /// <remarks>NPOI认为Excel的第一个单元格是：(0，0)</remarks>
- /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
- publicstaticvoid ExportEasy(DataTable dtSource, string strFileName)
- {
- HSSFWorkbook workbook = new HSSFWorkbook();
- HSSFSheet sheet = workbook.CreateSheet();
- //填充表头
- HSSFRow dataRow = sheet.CreateRow(0);
- foreach (DataColumn column in dtSource.Columns)
- {
- dataRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
- }
- //填充内容
- for (int i = 0; i < dtSource.Rows.Count; i++)
- {
- dataRow = sheet.CreateRow(i + 1);
- for (int j = 0; j < dtSource.Columns.Count; j++)
- {
- dataRow.CreateCell(j).SetCellValue(dtSource.Rows[i][j].ToString());
- }
- }
- //保存
- using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
- {
- workbook.Write(fs);
- }
- workbook.Dispose();
- }
/// <summary>
/// NPOI简单Demo，快速入门代码
/// </summary>
/// <param name="dtSource"></param>
/// <param name="strFileName"></param>
/// <remarks>NPOI认为Excel的第一个单元格是：(0，0)</remarks>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
public static void ExportEasy(DataTable dtSource, string strFileName)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.CreateSheet();
//填充表头
HSSFRow dataRow = sheet.CreateRow(0);
foreach (DataColumn column in dtSource.Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
}
//填充内容
for (int i = 0; i < dtSource.Rows.Count; i++)
{
dataRow = sheet.CreateRow(i + 1);
for (int j = 0; j < dtSource.Columns.Count; j++)
{
dataRow.CreateCell(j).SetCellValue(dtSource.Rows[i][j].ToString());
}
}
//保存
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
workbook.Write(fs);
}
workbook.Dispose();
}
接下来是柳永法(yongfa365)'Blog封装的可以用在实际项目中的类，实现的功能有（仅NPOI）：
- 支持web及winform从DataTable导出到Excel。
- 生成速度很快。
- 准确判断数据类型，不会出现身份证转数值等上面提到的一系列问题。
- 如果单页条数大于65535时会新建工作表。
- 列宽自适应。
- 支持读取Excel。
- 调用方便，只一调用一个静态类就OK了。
因为测试期间发现MyXls导出速度要比NPOI慢3倍，而NPOI既能满足我们的导出需求，又能很好的满足我们的导入需求，所以只针对NPOI进行全方位功能实现及优化。
MyXls导出相关类：
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using org.in2bits.MyXls;
- using org.in2bits.MyXls.ByteUtil;
- using System.Data;
- class ExcelHelper
- {
- publicstaticvoid Export(DataTable dtSource, string strHeaderText, string strFileName)
- {
- XlsDocument xls = new XlsDocument();
- xls.FileName = DateTime.Now.ToString("yyyyMMddHHmmssffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);
- xls.SummaryInformation.Author = "yongfa365"; //填加xls文件作者信息
- xls.SummaryInformation.NameOfCreatingApplication = "liu yongfa"; //填加xls文件创建程序信息
- xls.SummaryInformation.LastSavedBy = "LastSavedBy"; //填加xls文件最后保存者信息
- xls.SummaryInformation.Comments = "Comments"; //填加xls文件作者信息
- xls.SummaryInformation.Title = "title"; //填加xls文件标题信息
- xls.SummaryInformation.Subject = "Subject";//填加文件主题信息
- xls.DocumentSummaryInformation.Company = "company";//填加文件公司信息
- Worksheet sheet = xls.Workbook.Worksheets.Add("Sheet1");//状态栏标题名称
- Cells cells = sheet.Cells;
- foreach (DataColumn col in dtSource.Columns)
- {
- Cell cell = cells.Add(1, col.Ordinal + 1, col.ColumnName);
- cell.Font.FontFamily = FontFamilies.Roman; //字体
- cell.Font.Bold = true; //字体为粗体
- }
- #region 填充内容
- XF dateStyle = xls.NewXF();
- dateStyle.Format = "yyyy-mm-dd";
- for (int i = 0; i < dtSource.Rows.Count; i++)
- {
- for (int j = 0; j < dtSource.Columns.Count; j++)
- {
- int rowIndex = i + 2;
- int colIndex = j + 1;
- string drValue = dtSource.Rows[i][j].ToString();
- switch (dtSource.Rows[i][j].GetType().ToString())
- {
- case"System.String"://字符串类型
- cells.Add(rowIndex, colIndex, drValue);
- break;
- case"System.DateTime"://日期类型
- DateTime dateV;
- DateTime.TryParse(drValue, out dateV);
- cells.Add(rowIndex, colIndex, dateV, dateStyle);
- break;
- case"System.Boolean"://布尔型
- bool boolV = false;
- bool.TryParse(drValue, out boolV);
- cells.Add(rowIndex, colIndex, boolV);
- break;
- case"System.Int16"://整型
- case"System.Int32":
- case"System.Int64":
- case"System.Byte":
- int intV = 0;
- int.TryParse(drValue, out intV);
- cells.Add(rowIndex, colIndex, intV);
- break;
- case"System.Decimal"://浮点型
- case"System.Double":
- double doubV = 0;
- double.TryParse(drValue, out doubV);
- cells.Add(rowIndex, colIndex, doubV);
- break;
- case"System.DBNull"://空值处理
- cells.Add(rowIndex, colIndex, null);
- break;
- default:
- cells.Add(rowIndex, colIndex, null);
- break;
- }
- }
- }
- #endregion
- xls.FileName = strFileName;
- xls.Save();
- }
- }
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using org.in2bits.MyXls;
using org.in2bits.MyXls.ByteUtil;
using System.Data;
class ExcelHelper
{
public static void Export(DataTable dtSource, string strHeaderText, string strFileName)
{
XlsDocument xls = new XlsDocument();
xls.FileName = DateTime.Now.ToString("yyyyMMddHHmmssffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);
xls.SummaryInformation.Author = "yongfa365"; //填加xls文件作者信息
xls.SummaryInformation.NameOfCreatingApplication = "liu yongfa"; //填加xls文件创建程序信息
xls.SummaryInformation.LastSavedBy = "LastSavedBy"; //填加xls文件最后保存者信息
xls.SummaryInformation.Comments = "Comments"; //填加xls文件作者信息
xls.SummaryInformation.Title = "title"; //填加xls文件标题信息
xls.SummaryInformation.Subject = "Subject";//填加文件主题信息
xls.DocumentSummaryInformation.Company = "company";//填加文件公司信息
Worksheet sheet = xls.Workbook.Worksheets.Add("Sheet1");//状态栏标题名称
Cells cells = sheet.Cells;
foreach (DataColumn col in dtSource.Columns)
{
Cell cell = cells.Add(1, col.Ordinal + 1, col.ColumnName);
cell.Font.FontFamily = FontFamilies.Roman; //字体
cell.Font.Bold = true; //字体为粗体
}
#region 填充内容
XF dateStyle = xls.NewXF();
dateStyle.Format = "yyyy-mm-dd";
for (int i = 0; i < dtSource.Rows.Count; i++)
{
for (int j = 0; j < dtSource.Columns.Count; j++)
{
int rowIndex = i + 2;
int colIndex = j + 1;
string drValue = dtSource.Rows[i][j].ToString();
switch (dtSource.Rows[i][j].GetType().ToString())
{
case "System.String"://字符串类型
cells.Add(rowIndex, colIndex, drValue);
break;
case "System.DateTime"://日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
cells.Add(rowIndex, colIndex, dateV, dateStyle);
break;
case "System.Boolean"://布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
cells.Add(rowIndex, colIndex, boolV);
break;
case "System.Int16"://整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
int.TryParse(drValue, out intV);
cells.Add(rowIndex, colIndex, intV);
break;
case "System.Decimal"://浮点型
case "System.Double":
double doubV = 0;
double.TryParse(drValue, out doubV);
cells.Add(rowIndex, colIndex, doubV);
break;
case "System.DBNull"://空值处理
cells.Add(rowIndex, colIndex, null);
break;
default:
cells.Add(rowIndex, colIndex, null);
break;
}
}
}
#endregion
xls.FileName = strFileName;
xls.Save();
}
}
NPOI导入导出相关类：
- using System;
- using System.Collections.Generic;
- using System.Data;
- using System.IO;
- using System.Text;
- using System.Web;
- using NPOI;
- using NPOI.HPSF;
- using NPOI.HSSF;
- using NPOI.HSSF.UserModel;
- using NPOI.HSSF.Util;
- using NPOI.POIFS;
- using NPOI.Util;
- publicclass ExcelHelper
- {
- /// <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>
- /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
- publicstaticvoid 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>
- /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
- publicstatic 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 = "http://www.yongfa365.com/";
- workbook.DocumentSummaryInformation = dsi;
- SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
- si.Author = "柳永法"; //填加xls文件作者信息
- si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
- si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
- si.Comments = "说明信息"; //填加xls文件作者信息
- si.Title = "NPOI测试"; //填加xls文件标题信息
- si.Subject = "NPOI测试Demo";//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 = newint[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>
- /// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
- publicstaticvoid 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>
- publicstatic 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;
- }
- }
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Web;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.Util;
public class ExcelHelper
{
/// <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>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
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>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
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 = "http://www.yongfa365.com/";
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "柳永法"; //填加xls文件作者信息
si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
si.Comments = "说明信息"; //填加xls文件作者信息
si.Title = "NPOI测试"; //填加xls文件标题信息
si.Subject = "NPOI测试Demo";//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>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
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;
}
}
Aspose.Cells 使用整理
以上
这两天用Aspose.Cells构建一个Excel报表,感觉这个组件还比较好用.记录一下常用的使用知识:这两天用Aspose.Cells构建一个Excel报表,感觉这个组件还比较好用.记录一下常用的使用知识:
1.创建Workbook和Worksheet
workbook&worksheet1
Workbook wb = new Workbook();
wb.Worksheets.Clear();
wb.Worksheets.Add("New Worksheet1");//New Worksheet1是Worksheet的name
Worksheet ws = wb.Worksheets[0];
如果直接用下边两句则直接使用默认的第一个Worksheet:
workbook&worksheet2
Workbook wb = new Workbook();
Worksheet ws = wb.Worksheets[0];
2.给Cell赋值设置背景颜色并加背景色:
cell1
Cell cell = ws.Cells[0, 0];
cell.PutValue("填充"); //必须用PutValue方法赋值
cell.Style.ForegroundColor = Color.Yellow;
cell.Style.Pattern = BackgroundType.Solid;
cell.Style.Font.Size = 10;
cell.Style.Font.Color = Color.Blue;
自定义格式:
cell2
cell.Style.Custom = "ddd, dd mmmm 'yy";
旋转字体:
cell3
cell.Style.Rotation = 90;
3.设置Range并赋值加Style
range1
int styleIndex = wb.Styles.Add();
Style style = wb.Styles[styleIndex];
style.ForegroundColor = Color.Yellow;
style.Pattern = BackgroundType.Solid;
style.Font.Size = 10;
//从Cells[0,0]开始创建一个2行3列的Range
Range range = ws.Cells.CreateRange(0, 0, 2, 3);
Cell cell = range[0, 0];
cell.Style.Font = 9;
range.Style = style;
range.Merge();
注意Range不能直接设置Style.必须先定义style再将style赋给Style.其他设置和Cell基本一致.Range的Style会覆盖Cell定义的Style.另外必须先赋值再传Style.否则可能不生效.
4.使用Formula:
formula1
ws.Cells[0,0].PutValue(1);
ws.Cells[1,0].PutValue(20);
ws.Cells[2,0].Formula="SUM(A1:B1)";
wb.CalculateFormula(true);
Save Excel文件的时候必须调用CalculateFormula方法计算结果.
5.插入图片:
pictures1
string imageUrl = System.Web.HttpContext.Current.Server.MapPath("~/images/log_topleft.gif");
ws.Pictures.Add(10, 10, imageUrl);
6.使用Validations:
validations1
Cells cells = ws.Cells;
cells[12, 0].PutValue("Please enter a number other than 0 to 10 in B1 to activate data validation:");
cells[12, 0].Style.IsTextWrapped = true;
cells[12, 1].PutValue(5);
Validations validations = totalSheet.Validations;
Validation validation = validations[validations.Add()];
//Set the data validation type
validation.Type = ValidationType.WholeNumber;
//Set the operator for the data validation
validation.Operator = OperatorType.Between;
//Set the value or expression associated with the data validation
validation.Formula1 = "0";
//the value or expression associated with the second part of the data validation
validation.Formula2 = "10";
validation.ShowError = true;
//Set the validation alert style
validation.AlertStyle = ValidationAlertType.Information;
//Set the title of the data-validation error dialog box
validation.ErrorTitle = "Error";
//Set the data validation error message
validation.ErrorMessage = " Enter value between 0 to 10";
//Set the data validation input message
validation.InputMessage = "Data Validation using Condition for Numbers";
validation.IgnoreBlank = true;
validation.ShowInput = true;
validation.ShowError = true;
//设置Validations的区域，因为现在要Validations的位置是12,1，所以下面设置对应的也要是12,1
CellArea cellArea;
cellArea.StartRow = 12;
cellArea.EndRow = 12;
cellArea.StartColumn = 1;
cellArea.EndColumn = 1;
validation.AreaList.Add(cellArea);
/*
要注意 的地方Validations 也是和Range的Style一样，要新增的，否则不生效
*/
相关源码及测试用例下载地址：
http://download.csdn.net/source/2330821
参考地址：
NPOI导出Excel表功能实现(多个工作簿)：http://www.cnblogs.com/zhengjuzhuan/archive/2010/02/01/1661103.html
在 Server 端存取 Excel 檔案的利器：NPOI Library：http://msdn.microsoft.com/zh-tw/ee818993.aspx
ASP.NET使用NPOI类库导出Excel：http://www.cnblogs.com/niunan/archive/2010/03/30/1700706.html
总结：
通过以上分析，我们不难发现，用NPOI或MyXls代替是Excel是很明智的，在发文前，我看到NPOI及MyXls仍然在活跃的更新中。在使用过程中发现这两个组件极相似，以前看过文章说他们使用的内核是一样的。还有NPOI是国人开发的，且有相关中文文档，在很多地方有相关引用，下载量也很大。并且它支持Excel，看到MyXls相关问题基本上没人回答，所以推荐使用NPOI。MyXls可以直接Cell.Font.Bold操作，而NPOI得使用CellType多少感觉有点麻烦。