In diesem Artikel werden hauptsächlich C# zur Implementierung Hunderttausender Datenexporte nach Excel und verschiedene Excel-Betriebsbeispiele vorgestellt. Der detaillierte Code wird hier zusammengestellt.
Exportieren Sie zuerst den Code
/// <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;
}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
}1. Öffnen Sie die vorhandene Excel-Datei
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
2. Kopieren Sie die Blattseite
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
Beachten Sie, dass sich die beiden Parameter der Copy-Methode hier auf die beziehen copy Es wird angezeigt, ob sich die neue Blattseite vor oder hinter der angegebenen Blattseite befindet. Das obige Beispiel bedeutet, dass sich die kopierte Blattseite hinter der ersten Blattseite befindet.
3. Blattseite löschen
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();
4 🎜>
Code kopieren Der Code lautet wie folgt:
(xlsApp.ActiveWorkbook.Sheets[1] as Arbeitsblatt). Select(Type.Missing); //Wählen Sie ein Blatt aus
workbook.Saved = true; workbook.SaveCopyAs(filepath);
Methode 2:
workbook.Close(true, Type.Missing, Type.Missing); workbook = null; xlsApp.Quit(); xlsApp = null;
Methode 3:
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
}
}
}
Exportcode:
Importcode:
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();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//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");Zellenbreite und -höhe festlegen:
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;
Zellen zusammenführen:
Zellen zusammenführen deklarieren tatsächlich einen Bereich, in dem die Zellen zusammengeführt werden. und der zusammengeführte Inhalt und Stil basieren auf der Zelle in der oberen linken Ecke des Bereichs.
//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);
Formel hinzufügen:
Verwenden Sie Cells CellFormula, um die Formel festzulegen, bei der es sich um eine Zeichenfolgenformel handelt Es ist nicht nötig, das =-Zeichen davor einzufügen.
//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));
Schreiben Sie die Arbeitsmappe in eine Datei, um den Effekt anzuzeigen:
//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
using (FileStream fs = new FileStream("生成效果.xls", FileMode.Create, FileAccess.Write))
{
workbook.Write(fs);
}
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