初始化CRICS
This commit is contained in:
203
Common/ExcelHelper.cs
Normal file
203
Common/ExcelHelper.cs
Normal file
@@ -0,0 +1,203 @@
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
using System.Linq;
|
||||
using System.Text;
|
||||
using NPOI.SS.UserModel;
|
||||
using NPOI.XSSF.UserModel;
|
||||
using NPOI.HSSF.UserModel;
|
||||
using System.IO;
|
||||
using System.Data;
|
||||
|
||||
namespace Common
|
||||
{
|
||||
/// <summary>
|
||||
/// NPOI读写Excel操作类
|
||||
/// </summary>
|
||||
public class ExcelHelper : IDisposable
|
||||
{
|
||||
private string fileName = null; //文件名
|
||||
private IWorkbook workbook = null;
|
||||
private FileStream fs = null;
|
||||
private bool disposed;
|
||||
|
||||
public ExcelHelper(string fileName)
|
||||
{
|
||||
this.fileName = fileName;
|
||||
disposed = false;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 将DataTable数据导入到excel中
|
||||
/// </summary>
|
||||
/// <param name="data">要导入的数据</param>
|
||||
/// <param name="isColumnWritten">DataTable的列名是否要导入</param>
|
||||
/// <param name="sheetName">要导入的excel的sheet的名称</param>
|
||||
/// <returns>导入数据行数(包含列名那一行)</returns>
|
||||
public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten)
|
||||
{
|
||||
int i = 0;
|
||||
int j = 0;
|
||||
int count = 0;
|
||||
ISheet sheet = null;
|
||||
|
||||
fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
|
||||
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
|
||||
workbook = new XSSFWorkbook();
|
||||
else if (fileName.IndexOf(".xls") > 0) // 2003版本
|
||||
workbook = new HSSFWorkbook();
|
||||
|
||||
try
|
||||
{
|
||||
if (workbook != null)
|
||||
{
|
||||
sheet = workbook.CreateSheet(sheetName);
|
||||
}
|
||||
else
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (isColumnWritten == true) //写入DataTable的列名
|
||||
{
|
||||
IRow row = sheet.CreateRow(0);
|
||||
for (j = 0; j < data.Columns.Count; ++j)
|
||||
{
|
||||
row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);
|
||||
}
|
||||
count = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
count = 0;
|
||||
}
|
||||
|
||||
for (i = 0; i < data.Rows.Count; ++i)
|
||||
{
|
||||
IRow row = sheet.CreateRow(count);
|
||||
for (j = 0; j < data.Columns.Count; ++j)
|
||||
{
|
||||
row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
|
||||
}
|
||||
++count;
|
||||
}
|
||||
workbook.Write(fs); //写入到excel
|
||||
return count;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
throw ex;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 将excel中的数据导入到DataTable中
|
||||
/// </summary>
|
||||
/// <param name="fileStream">文档流，空的话取文件路径</param>
|
||||
/// <param name="sheetName">excel工作薄sheet的名称</param>
|
||||
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
|
||||
/// <returns>返回的DataTable</returns>
|
||||
public DataTable ExcelToDataTable(Stream fileStream, string sheetName, bool isFirstRowColumn)
|
||||
{
|
||||
ISheet sheet = null;
|
||||
DataTable data = new DataTable();
|
||||
int startRow = 0;
|
||||
try
|
||||
{
|
||||
if (fileStream != null)
|
||||
{
|
||||
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
|
||||
workbook = new XSSFWorkbook(fileStream);
|
||||
else if (fileName.IndexOf(".xls") > 0) // 2003版本
|
||||
workbook = new HSSFWorkbook(fileStream);
|
||||
}
|
||||
else
|
||||
{
|
||||
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
|
||||
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
|
||||
workbook = new XSSFWorkbook(fs);
|
||||
else if (fileName.IndexOf(".xls") > 0) // 2003版本
|
||||
workbook = new HSSFWorkbook(fs);
|
||||
}
|
||||
if (string.IsNullOrEmpty(sheetName))
|
||||
{
|
||||
sheet = workbook.GetSheetAt(0);
|
||||
}
|
||||
else
|
||||
{
|
||||
sheet = workbook.GetSheet(sheetName);
|
||||
if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
|
||||
{
|
||||
sheet = workbook.GetSheetAt(0);
|
||||
}
|
||||
}
|
||||
if (sheet != null)
|
||||
{
|
||||
IRow firstRow = sheet.GetRow(0);
|
||||
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
|
||||
|
||||
if (isFirstRowColumn)
|
||||
{
|
||||
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
|
||||
{
|
||||
ICell cell = firstRow.GetCell(i);
|
||||
if (cell != null)
|
||||
{
|
||||
string cellValue = cell.StringCellValue;
|
||||
if (cellValue != null)
|
||||
{
|
||||
DataColumn column = new DataColumn(cellValue);
|
||||
data.Columns.Add(column);
|
||||
}
|
||||
}
|
||||
}
|
||||
startRow = sheet.FirstRowNum + 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
startRow = sheet.FirstRowNum;
|
||||
}
|
||||
//最后一列的标号
|
||||
int rowCount = sheet.LastRowNum;
|
||||
for (int i = startRow; i <= rowCount; ++i)
|
||||
{
|
||||
IRow row = sheet.GetRow(i);
|
||||
if (row == null) continue; //没有数据的行默认是null
|
||||
|
||||
DataRow dataRow = data.NewRow();
|
||||
for (int j = row.FirstCellNum; j < cellCount; ++j)
|
||||
{
|
||||
if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
|
||||
dataRow[j] = row.GetCell(j).ToString();
|
||||
}
|
||||
data.Rows.Add(dataRow);
|
||||
}
|
||||
}
|
||||
return data;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
throw ex;
|
||||
}
|
||||
}
|
||||
|
||||
public void Dispose()
|
||||
{
|
||||
Dispose(true);
|
||||
GC.SuppressFinalize(this);
|
||||
}
|
||||
|
||||
protected virtual void Dispose(bool disposing)
|
||||
{
|
||||
if (!this.disposed)
|
||||
{
|
||||
if (disposing)
|
||||
{
|
||||
if (fs != null)
|
||||
fs.Close();
|
||||
}
|
||||
fs = null;
|
||||
disposed = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user