先上导出代码
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/// <summary>
/// 导出速度最快
/// </summary>
/// <param name="list"><列名,数据></param>
/// <param name="filepath"></param>
/// <returns></returns>
public bool NewExport(List<DictionaryEntry> list, string filepath)
{
bool bSuccess = true ;
Microsoft.Office.Interop.Excel.Application appexcel = new Microsoft.Office.Interop.Excel.Application();
System.Reflection.Missing miss = System.Reflection.Missing.Value;
appexcel = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook workbookdata = null ;
Microsoft.Office.Interop.Excel.Worksheet worksheetdata = null ;
Microsoft.Office.Interop.Excel.Range rangedata;
workbookdata = appexcel.Workbooks.Add();
//设置对象不可见
appexcel.Visible = false ;
appexcel.DisplayAlerts = false ;
try
{
foreach (var lv in list)
{
var keys = lv.Key as List< string >;
var values = lv.Value as List<IList< object >>;
worksheetdata = (Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets.Add(miss, workbookdata.ActiveSheet);
for ( int i = 0; i < keys.Count-1; i++)
{
//给工作表赋名称
worksheetdata.Name = keys[0]; //列名的第一个数据位表名
worksheetdata.Cells[1, i + 1] = keys[i+1];
}
//因为第一行已经写了表头,所以所有数据都应该从a2开始
rangedata = worksheetdata.get_Range( "a2" , miss);
Microsoft.Office.Interop.Excel.Range xlrang = null ;
//irowcount为实际行数,最大行
int irowcount = values.Count;
int iparstedrow = 0, icurrsize = 0;
//ieachsize为每次写行的数值,可以自己设置
int ieachsize = 10000;
//icolumnaccount为实际列数,最大列数
int icolumnaccount = keys.Count-1;
//在内存中声明一个ieachsize×icolumnaccount的数组,ieachsize是每次最大存储的行数,icolumnaccount就是存储的实际列数
object [,] objval = new object [ieachsize, icolumnaccount];
icurrsize = ieachsize;
while (iparstedrow < irowcount)
{
if ((irowcount - iparstedrow) < ieachsize)
icurrsize = irowcount - iparstedrow;
//用for循环给数组赋值
for ( int i = 0; i < icurrsize; i++)
{
for ( int j = 0; j < icolumnaccount; j++)
{
var v = values[i + iparstedrow][j];
objval[i, j] = v != null ? v.ToString() : "" ;
}
}
string X = "A" + (( int )(iparstedrow + 2)).ToString();
string col = "" ;
if (icolumnaccount <= 26)
{
col = (( char )( 'A' + icolumnaccount - 1)).ToString() + (( int )(iparstedrow + icurrsize + 1)).ToString();
}
else
{
col = (( char )( 'A' + (icolumnaccount / 26 - 1))).ToString() + (( char )( 'A' + (icolumnaccount % 26 - 1))).ToString() + (( int )(iparstedrow + icurrsize + 1)).ToString();
}
xlrang = worksheetdata.get_Range(X, col);
xlrang.NumberFormat = "@" ;
// 调用range的value2属性,把内存中的值赋给excel
xlrang.Value2 = objval;
iparstedrow = iparstedrow + icurrsize;
}
}
((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets[ "Sheet1" ]).Delete();
((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets[ "Sheet2" ]).Delete();
((Microsoft.Office.Interop.Excel.Worksheet)workbookdata.Worksheets[ "Sheet3" ]).Delete();
//保存工作表
workbookdata.SaveAs(filepath, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
workbookdata.Close( false , miss, miss);
appexcel.Workbooks.Close();
appexcel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbookdata);
System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel.Workbooks);
System.Runtime.InteropServices.Marshal.ReleaseComObject(appexcel);
GC.Collect();
}
catch (Exception ex)
{
ErrorMsg = ex.Message;
bSuccess = false ;
}
finally
{
if (appexcel != null )
{
ExcelImportHelper.KillSpecialExcel(appexcel);
}
}
return bSuccess;
}
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range.NumberFormatLocal = "@" ; //设置单元格格式为文本
range = (Range)worksheet.get_Range( "A1" , "E1" ); //获取Excel多个单元格区域:本例做为Excel表头
range.Merge(0); //单元格合并动作
worksheet.Cells[1, 1] = "Excel单元格赋值" ; //Excel单元格赋值
range.Font.Size = 15; //设置字体大小
range.Font.Underline= true ; //设置字体是否有下划线
range.Font.Name= "黑体" ; 设置字体的种类
range.HorizontalAlignment=XlHAlign.xlHAlignCenter; //设置字体在单元格内的对其方式
range.ColumnWidth=15; //设置单元格的宽度
range.Cells.Interior.Color=System.Drawing.Color.FromArgb(255,204,153).ToArgb(); //设置单元格的背景色
range.Borders.LineStyle=1; //设置单元格边框的粗细
range.BorderAround(XlLineStyle.xlContinuous,XlBorderWeight.xlThick,XlColorIndex.xlColorIndexAutomatic,System.Drawing.Color.Black.ToArgb()); //给单元格加边框
range.Borders.get_Item(Microsoft.Office.Interop.Excel.XlBordersIndex.xlEdgeTop).LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlLineStyleNone; //设置单元格上边框为无边框
range.EntireColumn.AutoFit(); //自动调整列宽
Range.HorizontalAlignment= xlCenter; // 文本水平居中方式
Range.VerticalAlignment= xlCenter //文本垂直居中方式
Range.WrapText= true ; //文本自动换行
Range.Interior.ColorIndex=39; //填充颜色为淡紫色
Range.Font.Color=clBlue; //字体颜色
xlsApp.DisplayAlerts= false ; //对Excel的操作 不弹出提示信息
ApplicationClass xlsApp = new ApplicationClass(); // 1. 创建Excel应用程序对象的一个实例,相当于我们从开始菜单打开Excel应用程序。
if (xlsApp == null )
{
//对此实例进行验证,如果为null则表示运行此代码的机器可能未安装Excel
}
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1. 打开现有的Excel文件
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Workbook workbook = xlsApp.Workbooks.Open(excelFilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
Worksheet mySheet = workbook.Sheets[1] as Worksheet; //第一个sheet页
mySheet.Name = "testsheet" ; //这里修改sheet名称
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2.复制sheet页
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mySheet.Copy(Type.Missing, workbook.Sheets[1]);
//复制mySheet成一个新的sheet页,复制完后的名称是mySheet页名称后加一个(2),这里就是testsheet(2),复制完后,Worksheet的数量增加一个
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注意 这里Copy方法的两个参数,指是的复制出来新的sheet页是在指定sheet页的前面还是后面,上面的例子就是指复制的sheet页在第一个sheet页的后面。
3.删除sheet页
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xlsApp.DisplayAlerts = false ; //如果想删除某个sheet页,首先要将此项设为fasle。
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Delete();
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4.选中sheet页
(xlsApp.ActiveWorkbook.Sheets[1] as Worksheet).Select(Type.Missing); //选中某个sheet页
5.另存excel文件
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workbook.Saved = true ;
workbook.SaveCopyAs(filepath);
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6.释放excel资源
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workbook.Close( true , Type.Missing, Type.Missing);
workbook = null ;
xlsApp.Quit();
xlsApp = null ;
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方法2:
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Interop.Excel;
using System.Data;
namespace ExcelTest
{
public class ExcelUtil
{
System.Data.DataTable table11 = new System.Data.DataTable();
public void ExportToExcel(System.Data.DataTable table, string saveFileName)
{
bool fileSaved = false ;
//ExcelApp xlApp = new ExcelApp();
Application xlApp = new Application();
if (xlApp == null )
{
return ;
}
Workbooks workbooks = xlApp.Workbooks;
Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
Worksheet worksheet = (Worksheet)workbook.Worksheets[1]; //取得sheet1
long rows = table.Rows.Count;
/*下边注释的两行代码当数据行数超过行时,出现异常:异常来自HRESULT:0x800A03EC。因为:Excel 2003每个sheet只支持最大行数据
//Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count+2, gridview.Columns.View.VisibleColumns.Count+1]);
//fchR.Value2 = datas;*/
if (rows > 65535)
{
long pageRows = 60000; //定义每页显示的行数,行数必须小于
int scount = ( int )(rows / pageRows);
if (scount * pageRows < table.Rows.Count) //当总行数不被pageRows整除时,经过四舍五入可能页数不准
{
scount = scount + 1;
}
for ( int sc = 1; sc <= scount; sc++)
{
if (sc > 1)
{
object missing = System.Reflection.Missing.Value;
worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(
missing, missing, missing, missing); //添加一个sheet
}
else
{
worksheet = (Worksheet)workbook.Worksheets[sc]; //取得sheet1
}
string [,] datas = new string [pageRows + 1, table.Columns.Count+ 1];
for ( int i = 0; i < table.Columns.Count; i++) //写入字段
{
datas[0, i] = table.Columns[i].Caption;
}
Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);
range.Interior.ColorIndex = 15; //15代表灰色
range.Font.Bold = true ;
range.Font.Size = 9;
int init = int .Parse(((sc - 1) * pageRows).ToString());
int r = 0;
int index = 0;
int result;
if (pageRows * sc >= table.Rows.Count)
{
result = table.Rows.Count;
}
else
{
result = int .Parse((pageRows * sc).ToString());
}
for (r = init; r < result; r++)
{
index = index + 1;
for ( int i = 0; i < table.Columns.Count; i++)
{
if (table.Columns[i].DataType == typeof ( string ) || table.Columns[i].DataType == typeof (Decimal) || table.Columns[i].DataType == typeof (DateTime))
{
object obj = table.Rows[r][table.Columns[i].ColumnName];
datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim(); //在obj.ToString()前加单引号是为了防止自动转化格式
}
}
}
Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 2, table.Columns.Count + 1]);
fchR.Value2 = datas;
worksheet.Columns.EntireColumn.AutoFit(); //列宽自适应。
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, table.Columns.Count]);
//15代表灰色
range.Font.Size = 9;
range.RowHeight = 14.25;
range.Borders.LineStyle = 1;
range.HorizontalAlignment = 1;
}
}
else
{
string [,] datas = new string [table.Rows.Count + 2, table.Columns.Count + 1];
for ( int i = 0; i < table.Columns.Count; i++) //写入字段
{
datas[0, i] = table.Columns[i].Caption;
}
Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, table.Columns.Count]);
range.Interior.ColorIndex = 15; //15代表灰色
range.Font.Bold = true ;
range.Font.Size = 9;
int r = 0;
for (r = 0; r < table.Rows.Count; r++)
{
for ( int i = 0; i < table.Columns.Count; i++)
{
if (table.Columns[i].DataType == typeof ( string ) || table.Columns[i].DataType == typeof (Decimal) || table.Columns[i].DataType == typeof (DateTime))
{
object obj = table.Rows[r][table.Columns[i].ColumnName];
datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim(); //在obj.ToString()前加单引号是为了防止自动转化格式
}
}
//System.Windows.Forms.Application.DoEvents();
}
Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 2, table.Columns.Count + 1]);
fchR.Value2 = datas;
worksheet.Columns.EntireColumn.AutoFit(); //列宽自适应。
range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[table.Rows.Count + 1, table.Columns.Count]);
//15代表灰色
range.Font.Size = 9;
range.RowHeight = 14.25;
range.Borders.LineStyle = 1;
range.HorizontalAlignment = 1;
}
if (saveFileName != "" )
{
try
{
workbook.Saved = true ;
workbook.SaveCopyAs(saveFileName);
fileSaved = true ;
}
catch (Exception ex)
{
fileSaved = false ;
}
}
else
{
fileSaved = false ;
}
xlApp.Quit();
GC.Collect(); //强行销毁
}
}
}
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方法3:
先去官网:http://npoi.codeplex.com/下载需要引入dll(可以选择.net2.0或者.net4.0的dll),然后在网站中添加引用。
导出代码:
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NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
NPOI.SS.UserModel.ISheet sheet = book.CreateSheet( "test_01" );
// 第一列
NPOI.SS.UserModel.IRow row = sheet.CreateRow(0);
row.CreateCell(0).SetCellValue( "第一列第一行" );
// 第二列
NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(1);
row2.CreateCell(0).SetCellValue( "第二列第一行" );
// ...
// 写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
book.Write(ms);
Response.AddHeader( "Content-Disposition" , string .Format( "attachment; filename={0}.xls" , DateTime.Now.ToString( "yyyyMMddHHmmssfff" )));
Response.BinaryWrite(ms.ToArray());
book = null ;
ms.Close();
ms.Dispose();
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导入代码:
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HSSFWorkbook hssfworkbook;
#region
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.Sheet sheet = hssfworkbook.GetSheetAt(0);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
DataTable dt = new DataTable();
for ( int j = 0; j < (sheet.GetRow(0).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 = 0; i < row.LastCellNum; i++)
{
NPOI.SS.UserModel.Cell cell = row.GetCell(i);
if (cell == null )
{
dr[i] = null ;
}
else
{
dr[i] = cell.ToString();
}
}
dt.Rows.Add(dr);
}
return dt;
}
#endregion
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用法:
首先建立一个空白的工作簿用作测试,并在其中建立空白工作表,在表中建立空白行,在行中建立单元格,并填入内容:
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//建立空白工作簿
IWorkbook workbook = new HSSFWorkbook();
//在工作簿中:建立空白工作表
ISheet sheet = workbook.CreateSheet();
//在工作表中:建立行,参数为行号,从0计
IRow row = sheet.CreateRow(0);
//在行中:建立单元格,参数为列号,从0计
ICell cell = row.CreateCell(0);
//设置单元格内容
cell.SetCellValue( "实习鉴定表" );
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设置单元格样式:设置单元格样式时需要注意,务必创建一个新的样式对象进行设置,否则会将工作表所有单元格的样式一同设置,它们应该共享的是一个样式对象:
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ICellStyle style = workbook.CreateCellStyle();
//设置单元格的样式:水平对齐居中
style.Alignment = HorizontalAlignment.CENTER;
//新建一个字体样式对象
IFont font = workbook.CreateFont();
//设置字体加粗样式
font.Boldweight = short .MaxValue;
//使用SetFont方法将字体样式添加到单元格样式中
style.SetFont(font);
//将新的样式赋给单元格
cell.CellStyle = style;
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设置单元格宽高:
设置单元格的高度实际是设置其所在行高,所以要在单元格所在行上设置行高,行高设置数值好像是像素点的1/20,所以*20以便达到设置效果;
设置单元格的宽度实际上是设置其所在列宽,所以要在单元格所在列上设置(列的设置在工作表上),宽度数值好像是字符的1/256,所以*256以便达到设置效果。
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//设置单元格的高度
row.Height = 30 * 20;
//设置单元格的宽度
sheet.SetColumnWidth(0, 30 * 256);
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合并单元格:合并单元格实际上是声明一个区域,该区域中的单元格将进行合并,合并后的内容与样式以该区域最左上角的单元格为准。
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//设置一个合并单元格区域,使用上下左右定义CellRangeAddress区域
//CellRangeAddress四个参数为:起始行,结束行,起始列,结束列
sheet.AddMergedRegion( new CellRangeAddress(0, 0, 0, 10));
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添加公式:使用Cell的CellFormula来设置公式,是一个字符串,公式前不需要加=号。
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//通过Cell的CellFormula向单元格中写入公式
//注:直接写公式内容即可,不需要在最前加'='
ICell cell2 = sheet.CreateRow(1).CreateCell(0);
cell2.CellFormula = "HYPERLINK(\"测试图片.jpg\",\"测试图片.jpg\")" ;
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将工作簿写入文件查看效果:
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//将工作簿写入文件
using (FileStream fs = new FileStream( "生成效果.xls" , FileMode.Create, FileAccess.Write))
{
workbook.Write(fs);
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/ShoneH/p/5587358.html