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ASP.NET基于NPOI导出数据
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using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using System.Web;
using NPOI.HPSF;
using System.Data; namespace Mmmis.Common
{
public class ExcelHelper
{
#region Excel导入 /// <summary>
/// 从Excel取数据并记录到List集合里
/// </summary>
/// <param name="cellHeard">单元头的值和名称：{ { "UserName", "姓名" }, { "Age", "年龄" } };</param>
/// <param name="filePath">保存文件绝对路径</param>
/// <param name="errorMsg">错误信息</param>
/// <returns>转换后的List对象集合</returns>
public static List<T> ExcelToEntityList<T>(Dictionary<string, string> cellHeard, string filePath, out StringBuilder errorMsg) where T : new()
{
List<T> enlist = new List<T>();
errorMsg = new StringBuilder();
try
{
if (Regex.IsMatch(filePath, ".xls$")) //
{
enlist = Excel2003ToEntityList<T>(cellHeard, filePath, out errorMsg);
}
else if (Regex.IsMatch(filePath, ".xlsx$")) //
{
//return FailureResultMsg("请选择Excel文件"); // 未设计
}
return enlist;
}
catch (Exception ex)
{
throw ex;
}
} /// <summary>
/// 从Excel2003取数据并记录到List集合里
/// </summary>
/// <param name="cellHeard">单元头的Key和Value：{ { "UserName", "姓名" }, { "Age", "年龄" } };</param>
/// <param name="filePath">保存文件绝对路径</param>
/// <param name="errorMsg">错误信息</param>
/// <returns>转换好的List对象集合</returns>
private static List<T> Excel2003ToEntityList<T>(Dictionary<string, string> cellHeard, string filePath, out StringBuilder errorMsg) where T : new()
{
errorMsg = new StringBuilder(); // 错误信息,Excel转换到实体对象时，会有格式的错误信息
List<T> enlist = new List<T>(); // 转换后的集合
List<string> keys = cellHeard.Keys.ToList(); // 要赋值的实体对象属性名称
try
{
using (FileStream fs = File.OpenRead(filePath))
{
HSSFWorkbook workbook = new HSSFWorkbook(fs);
HSSFSheet sheet = (HSSFSheet)workbook.GetSheetAt(); // 获取此文件第一个Sheet页
for (int i = ; i <= sheet.LastRowNum; i++) // 从1开始，第0行为单元头
{
// 1.判断当前行是否空行，若空行就不在进行读取下一行操作，结束Excel读取操作
if (sheet.GetRow(i) == null)
{
break;
} T en = new T();
string errStr = ""; // 当前行转换时，是否有错误信息，格式为：第1行数据转换异常：XXX列；
for (int j = ; j < keys.Count; j++)
{
// 2.若属性头的名称包含'.',就表示是子类里的属性，那么就要遍历子类，eg：UserEn.TrueName
if (keys[j].IndexOf(".") >= )
{
// 2.1解析子类属性
string[] properotyArray = keys[j].Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
string subClassName = properotyArray[]; // '.'前面的为子类的名称
string subClassProperotyName = properotyArray[]; // '.'后面的为子类的属性名称
System.Reflection.PropertyInfo subClassInfo = en.GetType().GetProperty(subClassName); // 获取子类的类型
if (subClassInfo != null)
{
// 2.1.1 获取子类的实例
var subClassEn = en.GetType().GetProperty(subClassName).GetValue(en, null);
// 2.1.2 根据属性名称获取子类里的属性信息
System.Reflection.PropertyInfo properotyInfo = subClassInfo.PropertyType.GetProperty(subClassProperotyName);
if (properotyInfo != null)
{
try
{
// Excel单元格的值转换为对象属性的值，若类型不对，记录出错信息
properotyInfo.SetValue(subClassEn, GetExcelCellToProperty(properotyInfo.PropertyType, sheet.GetRow(i).GetCell(j)), null);
}
catch (Exception e)
{
if (errStr.Length == )
{
errStr = "第" + i + "行数据转换异常：";
}
errStr += cellHeard[keys[j]] + "列；";
} }
}
}
else
{
// 3.给指定的属性赋值
System.Reflection.PropertyInfo properotyInfo = en.GetType().GetProperty(keys[j]);
if (properotyInfo != null)
{
try
{
// Excel单元格的值转换为对象属性的值，若类型不对，记录出错信息
properotyInfo.SetValue(en, GetExcelCellToProperty(properotyInfo.PropertyType, sheet.GetRow(i).GetCell(j)), null);
}
catch (Exception e)
{
if (errStr.Length == )
{
errStr = "第" + i + "行数据转换异常：";
}
errStr += cellHeard[keys[j]] + "列；";
}
}
}
}
// 若有错误信息，就添加到错误信息里
if (errStr.Length > )
{
errorMsg.AppendLine(errStr);
}
enlist.Add(en);
}
}
return enlist;
}
catch (Exception ex)
{
throw ex;
}
} #endregion Excel导入 #region Excel导出 /// <summary>
/// 实体类集合导出到EXCLE2003
/// </summary>
/// <param name="cellHeard">单元头的Key和Value：{ { "UserName", "姓名" }, { "Age", "年龄" } };</param>
/// <param name="enList">数据源</param>
/// <param name="sheetName">工作表名称</param>
/// <returns>文件的下载地址</returns>
public static string EntityListToExcel2003(Dictionary<string, string> cellHeard, IList enList, string sheetName)
{
try
{
string fileName = sheetName + ".xls"; // 文件名称
string urlPath = "xjgl/uploadfiles/ExcelFiles/" + fileName; // 文件下载的URL地址，供给前台下载
string filePath = HttpContext.Current.Server.MapPath(urlPath); // 文件路径 // 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
} // 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.CreateSheet(sheetName); // 工作表
IRow row = sheet.CreateRow();
List<string> keys = cellHeard.Keys.ToList();
for (int i = ; i < keys.Count; i++)
{
row.CreateCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
} // 3.List对象的值赋值到Excel的单元格里
int rowIndex = ; // 从第二行开始赋值(第一行已设置为单元头)
foreach (var en in enList)
{
IRow rowTmp = sheet.CreateRow(rowIndex);
for (int i = ; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = null; // 属性的值
System.Reflection.PropertyInfo properotyInfo = null; // 属性的信息 // 3.1 若属性头的名称包含'.',就表示是子类里的属性，那么就要遍历子类，eg：UserEn.UserName
if (keys[i].IndexOf(".") >= )
{
// 3.1.1 解析子类属性(这里只解析1层子类，多层子类未处理)
string[] properotyArray = keys[i].Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
string subClassName = properotyArray[]; // '.'前面的为子类的名称
string subClassProperotyName = properotyArray[]; // '.'后面的为子类的属性名称
System.Reflection.PropertyInfo subClassInfo = en.GetType().GetProperty(subClassName); // 获取子类的类型
if (subClassInfo != null)
{
// 3.1.2 获取子类的实例
var subClassEn = en.GetType().GetProperty(subClassName).GetValue(en, null);
// 3.1.3 根据属性名称获取子类里的属性类型
properotyInfo = subClassInfo.PropertyType.GetProperty(subClassProperotyName);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(subClassEn, null); // 获取子类属性的值
}
}
}
else
{
// 3.2 若不是子类的属性，直接根据属性名称获取对象对应的属性
properotyInfo = en.GetType().GetProperty(keys[i]);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(en, null);
}
} // 3.3 属性值经过转换赋值给单元格值
if (properotyValue != null)
{
cellValue = properotyValue.ToString();
// 3.3.1 对时间初始值赋值为空
if (cellValue.Trim() == "0001/1/1 0:00:00" || cellValue.Trim() == "0001/1/1 23:59:59")
{
cellValue = "";
}
} // 3.4 填充到Excel的单元格里
rowTmp.CreateCell(i).SetCellValue(cellValue);
}
rowIndex++;
} // 4.生成文件
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close(); // 5.返回下载路径
return urlPath;
}
catch (Exception ex)
{
throw ex;
}
} /// <summary>
/// 导出到Excel表(一层属性)
/// </summary>
/// <param name="cellHeard">单元头的Key和Value：{ { "UserName", "姓名" }, { "Age", "年龄" } }</param>
/// <param name="enList">数据源LIST</param>
/// <param name="sheetName">工作表名称</param>
/// <returns>文件的下载地址</returns>
public static string EntityListToExcel2003One(Dictionary<string, string> cellHeard, IList enList, string sheetName)
{
try
{
string fileName = sheetName + ".xls"; // 文件名称
string urlPath = "xjgl/uploadfiles/ExcelFiles/" + fileName; // 文件下载的URL地址，供给前台下载
string filePath = HttpContext.Current.Server.MapPath(urlPath); // 文件路径
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
Directory.CreateDirectory(directoryName);
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.CreateSheet(sheetName); // 工作表
IRow row = sheet.CreateRow();
List<string> keys = cellHeard.Keys.ToList();
for (int i = ; i < keys.Count; i++)
row.CreateCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
int rowIndex = ; // 从第二行开始赋值(第一行已设置为单元头)
foreach (var en in enList)
{
IRow rowTmp = sheet.CreateRow(rowIndex);
for (int i = ; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = null; // 属性的值
System.Reflection.PropertyInfo properotyInfo = null; // 属性的信息
properotyInfo = en.GetType().GetProperty(keys[i]);
if (properotyInfo != null)
properotyValue = properotyInfo.GetValue(en, null);
if (properotyValue != null)
cellValue = properotyValue.ToString();
rowTmp.CreateCell(i).SetCellValue(cellValue);
}
rowIndex++;
}
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close();
return urlPath;
}
catch (Exception ex)
{
throw ex;
}
} #endregion Excel导出 /// <summary>
/// 保存Excel文件
/// <para>Excel的导入导出都会在服务器生成一个文件</para>
/// <para>路径：UpFiles/ExcelFiles</para>
/// </summary>
/// <param name="file">传入的文件对象</param>
/// <returns>如果保存成功则返回文件的位置;如果保存失败则返回空</returns>
public static string SaveExcelFile(HttpPostedFile file)
{
try
{
var fileName = file.FileName.Insert(file.FileName.LastIndexOf('.'), "-" + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
var filePath = Path.Combine(HttpContext.Current.Server.MapPath("~/UpFiles/ExcelFiles"), fileName);
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
}
file.SaveAs(filePath);
return filePath;
}
catch
{
return string.Empty;
}
} /// <summary>
/// 从Excel获取值传递到对象的属性里
/// </summary>
/// <param name="distanceType">目标对象类型</param>
/// <param name="sourceCell">对象属性的值</param>
private static Object GetExcelCellToProperty(Type distanceType, ICell sourceCell)
{
object rs = distanceType.IsValueType ? Activator.CreateInstance(distanceType) : null; // 1.判断传递的单元格是否为空
if (sourceCell == null || string.IsNullOrEmpty(sourceCell.ToString()))
{
return rs;
} // 2.Excel文本和数字单元格转换，在Excel里文本和数字是不能进行转换，所以这里预先存值
object sourceValue = null;
switch (sourceCell.CellType)
{
case CellType.Blank:
break; case CellType.Boolean:
break; case CellType.Error:
break; case CellType.Formula:
break; case CellType.Numeric: sourceValue = sourceCell.NumericCellValue;
break; case CellType.String: sourceValue = sourceCell.StringCellValue;
break; case CellType.Unknown:
break; default:
break;
} string valueDataType = distanceType.Name; // 在这里进行特定类型的处理
switch (valueDataType.ToLower()) // 以防出错，全部小写
{
case "string":
rs = sourceValue.ToString();
break;
case "int":
case "int16":
case "int32":
rs = (int)Convert.ChangeType(sourceCell.NumericCellValue.ToString(), distanceType);
break;
case "float":
case "single":
rs = (float)Convert.ChangeType(sourceCell.NumericCellValue.ToString(), distanceType);
break;
case "datetime":
rs = sourceCell.DateCellValue;
break;
case "guid":
rs = (Guid)Convert.ChangeType(sourceCell.NumericCellValue.ToString(), distanceType);
return rs;
}
return rs;
} public static string EntityListToExcel2003Dt(Dictionary<string, string> cellHeard, DataTable enList, string sheetName)
{
try
{
string fileName = sheetName + ".xls"; // 文件名称
string urlPath = "xjgl/uploadfiles/ExcelFiles/" + fileName; // 文件下载的URL地址，供给前台下载
string filePath = HttpContext.Current.Server.MapPath(urlPath); // 文件路径 // 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
} // 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.CreateSheet(sheetName); // 工作表
IRow row = sheet.CreateRow();
List<string> keys = cellHeard.Keys.ToList();
for (int i = ; i < keys.Count; i++)
{
row.CreateCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
} // 3.List对象的值赋值到Excel的单元格里
int rowIndex = ; // 从第二行开始赋值(第一行已设置为单元头)
foreach (var en in enList.Rows)
{
IRow rowTmp = sheet.CreateRow(rowIndex);
for (int i = ; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = null; // 属性的值
System.Reflection.PropertyInfo properotyInfo = null; // 属性的信息 // 3.1 若属性头的名称包含'.',就表示是子类里的属性，那么就要遍历子类，eg：UserEn.UserName
if (keys[i].IndexOf(".") >= )
{
// 3.1.1 解析子类属性(这里只解析1层子类，多层子类未处理)
string[] properotyArray = keys[i].Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
string subClassName = properotyArray[]; // '.'前面的为子类的名称
string subClassProperotyName = properotyArray[]; // '.'后面的为子类的属性名称
System.Reflection.PropertyInfo subClassInfo = en.GetType().GetProperty(subClassName); // 获取子类的类型
if (subClassInfo != null)
{
// 3.1.2 获取子类的实例
var subClassEn = en.GetType().GetProperty(subClassName).GetValue(en, null);
// 3.1.3 根据属性名称获取子类里的属性类型
properotyInfo = subClassInfo.PropertyType.GetProperty(subClassProperotyName);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(subClassEn, null); // 获取子类属性的值
}
}
}
else
{
// 3.2 若不是子类的属性，直接根据属性名称获取对象对应的属性
properotyInfo = en.GetType().GetProperty(keys[i]);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(en, null);
}
} // 3.3 属性值经过转换赋值给单元格值
if (properotyValue != null)
{
cellValue = properotyValue.ToString();
// 3.3.1 对时间初始值赋值为空
if (cellValue.Trim() == "0001/1/1 0:00:00" || cellValue.Trim() == "0001/1/1 23:59:59")
{
cellValue = "";
}
} // 3.4 填充到Excel的单元格里
rowTmp.CreateCell(i).SetCellValue(cellValue);
}
rowIndex++;
} // 4.生成文件
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close(); // 5.返回下载路径
return urlPath;
}
catch (Exception ex)
{
throw ex;
}
} public static string EntityListToExcel2003(Dictionary<string, string> cellHeard, DataTable dt, string sheetName)
{
try
{ string fileName = sheetName + "-" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".xls"; // 文件名称
string urlPath = "xjgl/uploadfiles/ExcelFiles/" + fileName; // 文件下载的URL地址，供给前台下载
string filePath = HttpContext.Current.Server.MapPath(urlPath); // 文件路径 // 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
} // 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.CreateSheet(sheetName); // 工作表
IRow row = sheet.CreateRow();
List<string> keys = cellHeard.Keys.ToList();
for (int i = ; i < keys.Count; i++)
{
row.CreateCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
} // 3.List对象的值赋值到Excel的单元格里
int rowIndex = ; // 从第二行开始赋值(第一行已设置为单元头) for (int j = ; j < dt.Columns.Count; j++)
{
for (int i = ; i < dt.Rows.Count; i++)
{
string cellValue = ""; // 单元格的值
IRow rowTmp = sheet.CreateRow(i);
cellValue = dt.Rows[i][j].ToString();
rowTmp.CreateCell(i).SetCellValue(cellValue);
}
} // 4.生成文件
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close(); // 5.返回下载路径
return urlPath;
}
catch (Exception ex)
{
throw ex;
}
} HSSFWorkbook hssfworkbook;
#region
/// <summary>
/// 导入Excel转datatable
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
public DataTable ImportExcelFile(string filePath)
{
#region//初始化信息
try
{
using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
}
catch (Exception e)
{
throw e;
}
#endregion NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt();
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
DataTable dt = new DataTable();
for (int j = ; j < (sheet.GetRow().LastCellNum); j++)
{
dt.Columns.Add(Convert.ToChar(((int)'A') + j).ToString());
}
while (rows.MoveNext())
{
HSSFRow row = (HSSFRow)rows.Current;
DataRow dr = dt.NewRow();
for (int i = ; i < row.LastCellNum; i++)
{
NPOI.SS.UserModel.ICell cell = row.GetCell(i);
if (cell == null)
{
dr[i] = null;
}
else
{
dr[i] = cell.ToString();
}
}
dt.Rows.Add(dr);
}
return dt;
}
#endregion /// <summary>
/// Datatable转Excel表
/// </summary>
/// <param name="dt"></param>
/// <param name="filePath"></param>
public static void WriteExcel(DataTable dt, string filePath)
{
if (!string.IsNullOrEmpty(filePath) && null != dt && dt.Rows.Count > )
{
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = book.CreateSheet(dt.TableName); NPOI.SS.UserModel.IRow row = sheet.CreateRow();
for (int i = ; i < dt.Columns.Count; i++)
{
row.CreateCell(i).SetCellValue(dt.Columns[i].ColumnName);
}
for (int i = ; i < dt.Rows.Count; i++)
{
NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(i + );
for (int j = ; j < dt.Columns.Count; j++)
{
row2.CreateCell(j).SetCellValue(Convert.ToString(dt.Rows[i][j]));
}
}
// 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, , data.Length);
fs.Flush();
}
book = null;
}
}
} /// <summary>
/// 导入数据超过60000条新增sheet
/// </summary>
/// <param name="dt"></param>
/// <param name="filePath"></param>
public static void NpoiExcel(DataTable dt, string filePath)
{
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
int SheetNum = ; int tempIndex = ; //标示
NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet" + SheetNum); NPOI.SS.UserModel.IRow headerrow = sheet.CreateRow();
ICellStyle style = book.CreateCellStyle();
style.Alignment = HorizontalAlignment.Center;
style.VerticalAlignment = VerticalAlignment.Center; for (int i = ; i < dt.Columns.Count; i++)
{
ICell cell = headerrow.CreateCell(i);
cell.CellStyle = style;
cell.SetCellValue(dt.Columns[i].ColumnName); }
//数据
for (int i = ; i < dt.Rows.Count; i++)
{
IRow row1 = sheet.CreateRow(tempIndex);
for (int j = ; j < dt.Columns.Count; j++)
{
ICell cell = row1.CreateCell(j);
cell.SetCellValue(dt.Rows[i][j].ToString());
}
if (tempIndex == )
{
SheetNum++;
sheet = book.CreateSheet("Sheet" + SheetNum);//
tempIndex = ;
headerrow = sheet.CreateRow();
style = book.CreateCellStyle();
style.Alignment = HorizontalAlignment.Center;
style.VerticalAlignment = VerticalAlignment.Center;
for (int m = ; m < dt.Columns.Count; m++)
{
ICell cell = headerrow.CreateCell(m);
cell.CellStyle = style;
cell.SetCellValue(dt.Columns[m].ColumnName); }
} tempIndex++;
}
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, , data.Length);
fs.Flush();
}
book = null;
}
} public static void WriteExcelMore(DataTable dt, string filePath)
{
if (!string.IsNullOrEmpty(filePath) && null != dt && dt.Rows.Count > )
{
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = null;
NPOI.SS.UserModel.IRow row = null;
NPOI.SS.UserModel.IRow row2 = null; for (int kk = ; kk < (dt.Rows.Count / ) + ; kk++)
{
book.CreateSheet(dt.TableName + kk.ToString());
row = sheet.CreateRow();
for (int i = ; i < dt.Columns.Count; i++)
{
row.CreateCell(i).SetCellValue(dt.Columns[i].ColumnName);
}
for (int i = (kk - ) * ; i < (dt.Rows.Count - ((kk - ) * )); i++)
{
row2 = sheet.CreateRow(i + );
for (int j = ; j < dt.Columns.Count; j++)
{
row2.CreateCell(j).SetCellValue(Convert.ToString(dt.Rows[i][j]));
}
}
} // 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, , data.Length);
fs.Flush();
}
book = null;
}
}
} public static string EntityListToExcel2003More(Dictionary<string, string> cellHeard, IList enList, string sheetName)
{
try
{
string fileName = sheetName + ".xls"; // 文件名称
string urlPath = "xjgl/uploadfiles/ExcelFiles/" + fileName; // 文件下载的URL地址，供给前台下载
string filePath = HttpContext.Current.Server.MapPath(urlPath); // 文件路径 // 1.检测是否存在文件夹，若不存在就建立个文件夹
string directoryName = Path.GetDirectoryName(filePath);
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
} int SheetNum = ; //标示 // 2.解析单元格头部，设置单元头的中文名称
HSSFWorkbook workbook = new HSSFWorkbook(); // 工作簿
ISheet sheet = workbook.CreateSheet("Sheet" + SheetNum.ToString()); // 工作表
IRow row = sheet.CreateRow();
List<string> keys = cellHeard.Keys.ToList();
for (int i = ; i < keys.Count; i++)
{
row.CreateCell(i).SetCellValue(cellHeard[keys[i]]); // 列名为Key的值
} // 3.List对象的值赋值到Excel的单元格里
int rowIndex = ; // 从第二行开始赋值(第一行已设置为单元头)
foreach (var en in enList)
{
IRow rowTmp = sheet.CreateRow(rowIndex);
for (int i = ; i < keys.Count; i++) // 根据指定的属性名称，获取对象指定属性的值
{
string cellValue = ""; // 单元格的值
object properotyValue = null; // 属性的值
System.Reflection.PropertyInfo properotyInfo = null; // 属性的信息 // 3.1 若属性头的名称包含'.',就表示是子类里的属性，那么就要遍历子类，eg：UserEn.UserName
if (keys[i].IndexOf(".") >= )
{
// 3.1.1 解析子类属性(这里只解析1层子类，多层子类未处理)
string[] properotyArray = keys[i].Split(new string[] { "." }, StringSplitOptions.RemoveEmptyEntries);
string subClassName = properotyArray[]; // '.'前面的为子类的名称
string subClassProperotyName = properotyArray[]; // '.'后面的为子类的属性名称
System.Reflection.PropertyInfo subClassInfo = en.GetType().GetProperty(subClassName); // 获取子类的类型
if (subClassInfo != null)
{
// 3.1.2 获取子类的实例
var subClassEn = en.GetType().GetProperty(subClassName).GetValue(en, null);
// 3.1.3 根据属性名称获取子类里的属性类型
properotyInfo = subClassInfo.PropertyType.GetProperty(subClassProperotyName);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(subClassEn, null); // 获取子类属性的值
}
}
}
else
{
// 3.2 若不是子类的属性，直接根据属性名称获取对象对应的属性
properotyInfo = en.GetType().GetProperty(keys[i]);
if (properotyInfo != null)
{
properotyValue = properotyInfo.GetValue(en, null);
}
} // 3.3 属性值经过转换赋值给单元格值
if (properotyValue != null)
{
cellValue = properotyValue.ToString();
// 3.3.1 对时间初始值赋值为空
if (cellValue.Trim() == "0001/1/1 0:00:00" || cellValue.Trim() == "0001/1/1 23:59:59")
{
cellValue = "";
}
} // 3.4 填充到Excel的单元格里
rowTmp.CreateCell(i).SetCellValue(cellValue); } if (rowIndex == )
{
SheetNum++;
rowIndex = ;
sheet = workbook.CreateSheet("Sheet" + SheetNum.ToString());
row = sheet.CreateRow();
List<string> keyss = cellHeard.Keys.ToList();
for (int ii = ; ii < keyss.Count; ii++)
{
row.CreateCell(ii).SetCellValue(cellHeard[keys[ii]]); // 列名为Key的值
}
} rowIndex++;
} // 4.生成文件
FileStream file = new FileStream(filePath, FileMode.Create);
workbook.Write(file);
file.Close(); // 5.返回下载路径
return urlPath;
}
catch (Exception ex)
{
throw ex;
}
} }
}
调用：
private void lnkToExcel_Click(object sender, System.EventArgs e)
{ DataTable dt = SqlData.ExecuteDataset(DbConfig.GetSetting(), CommandType.Text, BuildSQL()).Tables[]; List<Common.exp> enlist = new List<Common.exp>();
enlist = GetList<Common.exp>(dt); Dictionary<string, string> cellheader = new Dictionary<string, string>(); for (int i = ; i < dt.Columns.Count; i++)
{
cellheader.Add(dt.Columns[i].ToString(), dt.Columns[i].ToString());
} string urlPath = "";
if (dt.Rows.Count > )
urlPath = Gmis.Common.ExcelHelper.EntityListToExcel2003More(cellheader, enlist, "xjexp");
else
urlPath = Gmis.Common.ExcelHelper.EntityListToExcel2003One(cellheader, enlist, "xjexp");
DownFile(this, Server.MapPath(urlPath), "exp", false, true); }
public void DownFile(Page page, string path, string downfilename, bool isviture = true, bool deletefile = false)
{
string sFileName = "";
if (isviture)
{
sFileName = page.Server.MapPath(path);
}
else
{
sFileName = path;
}
string type = Path.GetExtension(sFileName);
FileStream fileStream = new FileStream(sFileName, FileMode.Open);
long fileSize = fileStream.Length;
byte[] fileBuffer = new byte[fileSize];
fileStream.Read(fileBuffer, , (int)fileSize);
//如果不写fileStream.Close()语句，用户在下载过程中选择取消，将不能再次下载
fileStream.Close(); page.Response.ContentType = "application/octet-stream";
page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(downfilename + type, Encoding.UTF8));
page.Response.AddHeader("Content-Length", fileSize.ToString()); page.Response.BinaryWrite(fileBuffer);
if (deletefile)
{
System.IO.File.Delete(sFileName);
}
page.Response.End();
page.Response.Close();
}
/// <summary>
/// DataTable转换成List<T>
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="table"></param>
/// <returns></returns>
public static List<T> GetList<T>(DataTable table)
{
List<T> list = new List<T>();
T t = default(T);
PropertyInfo[] propertypes = null;
string tempName = string.Empty;
foreach (DataRow row in table.Rows)
{
t = Activator.CreateInstance<T>();
propertypes = t.GetType().GetProperties();
foreach (PropertyInfo pro in propertypes)
{
tempName = pro.Name;
if (table.Columns.Contains(tempName))
{
object value = row[tempName];
if (!value.ToString().Equals(""))
{
pro.SetValue(t, value, null);
}
}
}
list.Add(t);
}
return list.Count == ? null : list;
} /// <summary>
/// List<T>转换成DataTable
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <returns></returns>
public static DataSet ConvertToDataSet<T>(IList<T> list)
{
if (list == null || list.Count <= )
{
return null;
} DataSet ds = new DataSet();
DataTable dt = new DataTable(typeof(T).Name);
DataColumn column;
DataRow row; System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance); foreach (T t in list)
{
if (t == null)
{
continue;
} row = dt.NewRow(); for (int i = , j = myPropertyInfo.Length; i < j; i++)
{
System.Reflection.PropertyInfo pi = myPropertyInfo[i]; string name = pi.Name; if (dt.Columns[name] == null)
{
column = new DataColumn(name, pi.PropertyType);
dt.Columns.Add(column);
} row[name] = pi.GetValue(t, null);
} dt.Rows.Add(row);
} ds.Tables.Add(dt); return ds;
}
下载源码 http://download.csdn.net/download/u012949335/10150996
