NPOI的匯入匯出EXCEL示範

using system;

using system.data;
using system.diagnostics;
using system.io;
using system.windows.forms;
using npoi.hssf.usermodel;
using npoi.ss.usermodel;
using npoi.xssf.usermodel;
namespace npoi匯入匯出
filestream fs = new filestream(s***.filename, filemode.open, fileaccess.read);
iworkbook book;
if (s***.filterindex == 1)
else
int exceptiontableindex = 0;
int exceptionrowindex = 0;
int exceptioncolumnindex = 0;
int sheetcount = book.numberofsheets;
tryfor (int i = 1; i <= sheet.lastrownum; i++)
if (cell.cachedformularesulttype == celltype.string)
}else
}else}}
ds.tables.add(dt);}}
catch (exception theexception)
**行列有錯誤！",exceptiontableindex,exceptionrowindex,exceptioncolumnindex,theexception.message));
}return ds;
}/// /// 匯出excel
/// 
/// 資料**資料來源
/// 資料來源列名集合
public static void exportexcel(datatable datatable, string colnames)
iworkbook book;
if (s***.filterindex == 1)
else
isheet sheet = book.createsheet("sheet1");
// 新增表頭
irow row = sheet.createrow(0);
int index = 0;
for (int n = 0; n < datatable.columns.count; n++)
// 新增資料
for (int i = 0; i < datatable.rows.count; i++)
}// 寫入 
memorystream ms = new memorystream();
book.write(ms);
using (filestream fs = new filestream(s***.filename, filemode.create, fileaccess.write))
ms.close();
ms.dispose();
process.start(s***.filename);
}/// /// 匯出excel
/// 
/// 關於行索引和行名的字典
/// 關於列索引和列名的字典
/// npoi**中的單元格模型集合
public static void exportexcel(dictionaryrowdictionary, dictionarycolumndictionary, listthenpoimodels)
iworkbook book;
if (s***.filterindex == 1)
else
isheet sheet = book.createsheet("sheet1");
// 新增表頭
irow row = sheet.createrow(0);
for (int n = 0; n <= columndictionary.count; n++)
else
icell cell = row.createcell(n);
cell.setcelltype(celltype.string);
cell.setcellvalue(tempvalue);
}// 新增資料
for (int i = 1; i <= rowdictionary.count; i++)
else
}icell cell = row.createcell(j);
cell.setcelltype(celltype.string);
cell.setcellvalue(tempvalue);}}
// 寫入 
memorystream ms = new memorystream();
book.write(ms);
using (filestream fs = new filestream(s***.filename, filemode.create, fileaccess.write))
ms.close();
ms.dispose();
process.start(s***.filename);}}
}

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