本博客所有文章分类的总目录：http://www.cnblogs.com/asxinyu/p/4288836.html
本博客其他.NET开源项目文章目录：http://www.cnblogs.com/asxinyu/p/4329755.html
上次发布了一个用Excel组件将数据导入到Excel的代码，用的过程中，感觉不好，特别是速度很慢。在博客园看到了一个NPOI Excel读写的开源组件，很不错，还是国人开发的。赞一个，谢谢NPOI开发团队，有这么好的东西奉献给大家啊。呵呵，我也把自己使用的代码奉献一下，也算推广一下吧。这个东西使用的好处是：使用简单，速度特快。NPOI的使用教程很详细，下面直接上代码：
using NPOI.Util;
using NPOI.HSSF.Model ;
using NPOI.HSSF.UserModel ;
using NPOI.HSSF ;
......
Code// 将数据集转换到Excel： ConvertDataTableToExcel ConvertDataGridViewToExcel // 目前支持的数据类型有:DataTable,二维数组,二维交错数组,DataGridView,ArrayList // 2010.01.03 采用NPOI类库，改善操作速度,便于扩展 /// <summary> /// 将数据集导出到Excel文件 /// </summary> /// <param name="data">一维数组</param> /// <param name="xlsSaveFileName">Excel文件名称</param> /// <param name="sheetName">工作簿名称</param> /// <returns>是否转换成功</returns> public static bool ConvertToExcel<T>(T[] data,string xlsSaveFileName,string sheetName) { FileStream fs = new FileStream (xlsSaveFileName, FileMode.Create ) ; try { HSSFWorkbook newBook = new HSSFWorkbook () ; HSSFSheet newSheet =(HSSFSheet ) newBook.CreateSheet (sheetName ) ;//新建工作簿 HSSFRow newRow = (HSSFRow )newSheet.CreateRow(0) ;//创建行 for (int i = 0 ; i <data.Length ; i ++ ) { newSheet.GetRow (0).CreateCell (i ).SetCellValue (Convert.ToDouble (data [i ].ToString ())) ;//写入数据 } newBook .Write (fs ) ; return true ; } catch (Exception err) { throw new Exception ("转换数据到Excel失败："+err.Message ) ; } finally { fs.Close () ; } } /// <summary> /// 将数据集导出到Excel文件 /// </summary> /// <param name="data">二维数组</param> /// <param name="xlsSaveFileName">Excel文件名称</param> /// <param name="sheetName">工作簿名称</param> /// <returns>是否转换成功</returns> public static bool ConvertToExcel<T>(T[,] data,string xlsSaveFileName,string sheetName) { FileStream fs = new FileStream (xlsSaveFileName, FileMode.Create ) ; try { HSSFWorkbook newBook = new HSSFWorkbook () ; HSSFSheet newSheet =(HSSFSheet ) newBook.CreateSheet (sheetName ) ;//新建工作簿 for (int i = 0 ; i <data.GetLength (0) ; i ++ ) { HSSFRow newRow = (HSSFRow )newSheet.CreateRow(i ) ;//创建行 for (int j = 0 ; j <data.GetLength (1) ; j ++ ) { newSheet.GetRow (i ).CreateCell (j ).SetCellValue (Convert.ToDouble (data [i,j ].ToString ())) ;//写入数据 } } newBook .Write (fs ) ; return true ; } catch (Exception err) { throw new Exception ("转换数据到Excel失败："+err.Message ) ; } finally { fs.Close () ; } } /// <summary> /// /// <summary> /// 将数据集导出到Excel文件 /// </summary> /// <param name="data">交错数组</param> /// <param name="xlsSaveFileName">Excel文件名称</param> /// <param name="sheetName">工作簿名称</param> /// <returns>是否转换成功</returns> /// </summary> public static bool ConvertToExcel<T>(T[][] data,string xlsSaveFileName,string sheetName) { FileStream fs = new FileStream (xlsSaveFileName, FileMode.Create ) ; try { HSSFWorkbook newBook = new HSSFWorkbook () ; HSSFSheet newSheet =(HSSFSheet ) newBook.CreateSheet (sheetName ) ;//新建工作簿 for (int i = 0 ; i <data.GetLength (0) ; i ++ ) { HSSFRow newRow = (HSSFRow )newSheet.CreateRow(i ) ;//创建行 for (int j = 0 ; j <data[i ].Length ; j ++ ) { newSheet.GetRow (i ).CreateCell (j ).SetCellValue (Convert.ToDouble (data [i][j ].ToString ())) ;//写入数据 } } newBook .Write (fs ) ; return true ; } catch (Exception err) { throw new Exception ("转换数据到Excel失败："+err.Message ) ; } finally { fs.Close () ; } } /// <summary> /// 将数据集导出到Excel文件 /// </summary> /// <param name="dt">DataTable对象</param> /// <param name="xlsSaveFileName">Excel文件名称</param> /// <param name="sheetName">工作簿名称</param> /// <returns>是否转换成功</returns> public static bool ConvertToExcel(System.Data.DataTable dt, string xlsSaveFileName,string sheetName) { FileStream fs = new FileStream (xlsSaveFileName, FileMode.Create ) ; try { HSSFWorkbook newBook = new HSSFWorkbook () ; HSSFSheet newSheet =(HSSFSheet ) newBook.CreateSheet (sheetName ) ;//新建工作簿 for (int i = 0 ; i <dt.Rows.Count ; i ++ ) { HSSFRow newRow = (HSSFRow )newSheet.CreateRow(i ) ;//创建行 for (int j = 0 ; j <dt.Columns.Count ; j ++ ) { newSheet.GetRow (i ).CreateCell (j ).SetCellValue (dt.Rows [i ][j].ToString ()) ;//写入数据 } } newBook .Write (fs ) ; return true ; } catch (Exception err) { throw new Exception ("转换数据到Excel失败："+err.Message ) ; } finally { fs.Close () ; } } /// <summary> /// 将数据集导出到Excel文件 /// </summary> /// <param name="dt">DataGridView对象</param> /// <param name="xlsSaveFileName">Excel文件名称</param> /// <param name="sheetName">工作簿名称</param> /// <returns>是否转换成功</returns> public static bool ConvertToExcel(System.Windows.Forms.DataGridView dgv, string xlsSaveFileName,string sheetName) { return ConvertToExcel((System.Data.DataTable )dgv.DataSource ,xlsSaveFileName,sheetName ) ; }
下面是导入数据到DataTable:
Code/// <summary> /// 将数据导出到DataTable中 /// </summary> /// <param name="data">二维数组数据</param> /// <param name="columnsName">列名</param> /// <returns>DataTable对象</returns> public static System.Data.DataTable ConvertToDataTable<T>(T[,] data , string[] columnsName) { System.Data.DataTable dt = new System.Data.DataTable () ; if (data.GetLength (1)>columnsName.Length ) { throw new Exception ("列名长度不足"); } try { //先添加列名 for (int i = 0 ; i <data.GetLength (1) ; i ++) { DataColumn dc = new DataColumn (columnsName [i ],typeof (System.String ) ) ; dt.Columns.Add (dc ) ; } //添加数据 for (int i = 0 ;i <data.GetLength (0) ;i ++ ) { DataRow dr = dt.Rows.Add () ; for (int j =0 ; j <data.GetLength (1); j ++) { dr [j ] = data[i,j ].ToString () ; } dt.Rows.Add (dr ) ; } return dt ; } catch (Exception err) { throw new Exception ("转换数据到DataTable失败："+err.Message ) ; } } /// <summary> /// 将数据导出到DataTable中 /// </summary> /// <param name="data">二维数组数据</param> /// <returns>DataTable对象</returns> public static System.Data.DataTable ConvertToDataTable<T>(T[,] data ) { System.Data.DataTable dt = new System.Data.DataTable () ; try { //先添加列名 for (int i = 0 ; i <data.GetLength (1) ; i ++) { DataColumn dc = new DataColumn() ; dt.Columns.Add (dc ) ; } //添加数据 for (int i = 0 ;i <data.GetLength (0) ;i ++ ) { DataRow dr = dt.Rows.Add () ; for (int j =0 ; j <data.GetLength (1); j ++) { dr [j ] = data[i,j ].ToString () ; } dt.Rows.Add (dr ) ; } return dt ; } catch (Exception err) { throw new Exception ("转换数据到DataTable失败："+err.Message ) ; } } /// <summary> /// 将数据导出到DataTable中 /// </summary> /// <param name="data">交错数组数据</param> /// <param name="columnsName">列名</param> /// <returns>DataTable对象</returns> public static System.Data.DataTable ConvertToDataTable<T>(T[][] data , string[] columnsName) { System.Data.DataTable dt = new System.Data.DataTable () ; if (data[0].Length >columnsName.Length ) { throw new Exception ("列名长度不足"); } try { //先添加列名 for (int i = 0 ; i <data[0].Length ; i ++) { DataColumn dc = new DataColumn (columnsName [i ],typeof (System.String ) ) ; dt.Columns.Add (dc ) ; } //添加数据 for (int i = 0 ;i <data.GetLength (0) ;i ++ ) { DataRow dr = dt.NewRow(); for (int j =0 ; j <data[i].Length ; j ++) { dr [j ] = data[i][j ].ToString () ; } dt.Rows.Add (dr ) ; } return dt ; } catch (Exception err) { throw new Exception ("转换数据到DataTable失败："+err.Message ) ; } } /// <summary> /// 将数据导出到DataTable中 /// </summary> /// <param name="data">交错数组数据</param> /// <returns>DataTable对象</returns> public static System.Data.DataTable ConvertToDataTable<T>(T[][] data) { System.Data.DataTable dt = new System.Data.DataTable () ; try { //先添加列名 for (int i = 0 ; i <data[0].Length ; i ++) { DataColumn dc = new DataColumn ( ) ; dt.Columns.Add (dc ) ; } //添加数据 for (int i = 0 ;i <data.GetLength (0) ;i ++ ) { DataRow dr = dt.NewRow(); for (int j =0 ; j <data[i].Length ; j ++) { dr [j ] = data[i][j ].ToString () ; } dt.Rows.Add (dr ) ; } return dt ; } catch (Exception err) { throw new Exception ("转换数据到DataTable失败："+err.Message ) ; } }
到此为止哦。这玩意的确好使，下次再用用看，里面功能很丰富啊。