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 ;
......
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// 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:
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/// <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。