1.新建Excel并保存数据
2.追加Excel并自动分页保存数据
View Code
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Excel = Microsoft.Office.Interop.Excel;
using System.Diagnostics;
using System.IO;
using System.Collections;
using System.Data;
namespace AssismentForm
{
/// <summary>
/// excel操作类
/// 开发环境：2007
/// </summary>
public class ExcelHelper1 : IDisposable
{
#region 构造函数
/// <summary>
/// 构造函数，打开一个已有的工作簿
/// </summary>
/// <param name="fileName">Excel文件名</param>
public ExcelHelper1(string fileName)
{
if (!File.Exists(fileName))
throw new Exception("指定路径的Excel文件不存在！");
//创建一个Application对象并使其可见
excelApp = new Excel.ApplicationClass();
excelApp.Visible = false;
excelApp.DisplayAlerts = false;
excelApp.AlertBeforeOverwriting = false;
//打开一个WorkBook
workBook = excelApp.Workbooks.Open(fileName,
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);
//得到WorkSheet对象
workSheet = (Excel.Worksheet)workBook.Worksheets.Add(Type.Missing, Type.Missing, Type.Missing, Type.Missing);
}
/// <summary>
/// 构造函数，新建一个工作簿
/// </summary>
public ExcelHelper1()
{
excelApp = new Excel.ApplicationClass();
excelApp.Visible = false;
//设置禁止弹出保存和覆盖的询问提示框
excelApp.DisplayAlerts = false;
excelApp.AlertBeforeOverwriting = false;
//新建一个WorkBook
workBook = excelApp.Workbooks.Add(Type.Missing);
//得到WorkSheet对象
workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);
((Excel.Worksheet)workBook.Sheets.get_Item(2)).Delete();
((Excel.Worksheet)workBook.Sheets.get_Item(2)).Delete();
}
#endregion
#region 成员变量
//输出路径
private string outputFile = null;
private object missing = System.Reflection.Missing.Value;
/// <summary>
/// ExcelApp应用程序
/// </summary>
public Excel.Application excelApp;
Excel.Workbook workBook;
/// <summary>
/// 工作表
/// </summary>
public Excel.Worksheet workSheet;
Excel.Range range;
Excel.Range range1;
Excel.Range range2;
Excel.TextBox textBox;
//WorkSheet数量
private int sheetCount = 1;
#endregion
#region 公共属性
/// <summary>
/// 输出Excel文件路径
/// </summary>
public string OutputFilePath
{
set { this.outputFile = value; }
}
#endregion
#region 公共方法
#region Data Export Methods
/// <summary>
/// 将DataTable数据写入Excel文件（不分页）
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="top">表格数据起始行索引</param>
/// <param name="left">表格数据起始列索引</param>
public void DataTableToExcel(DataTable dt, int top, int left)
{
int rowCount = dt.Rows.Count; //DataTable行数
int colCount = dt.Columns.Count; //DataTable列数
//利用二维数组批量写入
object[,] arr = new object[rowCount + 1, colCount];
for (int j = 0; j < rowCount; j++)
{
for (int k = 0; k < colCount; k++)
{
if (j == 0)
{
arr[j, k] = dt.Columns[k].ColumnName;
}
arr[j + 1, k] = dt.Rows[j][k].ToString();
}
}
range = (Excel.Range)workSheet.Cells[top, left];
range = range.get_Resize(rowCount + 1, colCount);
range.Value2 = arr;
}
/// <summary>
/// 将DataTable数据写入Excel文件（自动分页）
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="sheetCounts">sheet数量</param>
/// <param name="top">表格数据起始行索引</param>
/// <param name="left">表格数据起始列索引</param>
/// <param name="rowsList">每个sheet行数</param>
/// <param name="nameList">名字列表</param>
public void DataTableToExcel(DataTable dt, int sheetCounts, List<int> rowsList, List<string> nameList, int top, int left)
{
int rowCount = dt.Rows.Count; //源DataTable行数
int colCount = dt.Columns.Count; //源DataTable列数
sheetCount = sheetCounts; //WorkSheet个数
//复制sheetCount-1个WorkSheet对象
for (int i = 1; i < sheetCount; i++)
{
workSheet = (Excel.Worksheet)workBook.Worksheets.get_Item(i);
workSheet.Copy(missing, workBook.Worksheets[i]);
}
int rows = 0;
for (int i = 1; i <= sheetCount; i++)
{
int startRow = rows; //记录起始行索引
rows += rowsList[i - 1];
//获取要写入数据的WorkSheet对象，并重命名
workSheet = (Excel.Worksheet)workBook.Worksheets.get_Item(i);
workSheet.Name = i + "-" + nameList[i - 1];
//利用二维数组批量写入
int row = rowsList[i - 1];
object[,] ss = new object[row + 1, colCount];
for (int j = 0; j < row; j++)
{
for (int k = 0; k < colCount; k++)
{
if (j == 0)
{
ss[j, k] = dt.Columns[k].ColumnName;
}
ss[j + 1, k] = dt.Rows[startRow + j][k].ToString();
}
}
range = (Excel.Range)workSheet.Cells[top, left];
range = range.get_Resize(row + 1, colCount);
range.Value2 = ss;
}
}
#endregion
#region 输出Excel(注意：如果目标文件已存在的话会出错)
/// <summary>
/// 保存文件
/// </summary>
public void SaveFile()
{
try
{
workBook.Save();
}
catch (Exception e)
{
throw e;
}
finally
{
this.Quit();
}
}
/// <summary>
/// 另存文件
/// </summary>
public void SaveAsFile()
{
if (this.outputFile == null)
throw new Exception("没有指定输出文件路径！");
try
{
workBook.SaveAs(outputFile, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
}
catch (Exception e)
{
throw e;
}
finally
{
this.Quit();
}
}
/// <summary>
/// 将Excel文件另存为指定格式
/// </summary>
/// <param name="format">HTML，CSV，TEXT，EXCEL，XML</param>
public void SaveAsFile(string format)
{
if (this.outputFile == null)
throw new Exception("没有指定输出文件路径！");
try
{
switch (format)
{
case "HTML":
{
workBook.SaveAs(outputFile, Excel.XlFileFormat.xlHtml, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
case "CSV":
{
workBook.SaveAs(outputFile, Excel.XlFileFormat.xlCSV, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
case "TEXT":
{
workBook.SaveAs(outputFile, Excel.XlFileFormat.xlHtml, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
default:
{
workBook.SaveAs(outputFile, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
}
}
catch (Exception e)
{
throw e;
}
finally
{
this.Quit();
}
}
/// <summary>
/// 另存文件
/// </summary>
/// <param name="fileName">文件名</param>
public void SaveFile(string fileName)
{
try
{
workBook.SaveAs(fileName, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
}
catch (Exception e)
{
throw e;
}
finally
{
this.Quit();
}
}
/// <summary>
/// 将Excel文件另存为指定格式
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="format">HTML，CSV，TEXT，EXCEL，XML</param>
public void SaveAsFile(string fileName, string format)
{
try
{
switch (format)
{
case "HTML":
{
workBook.SaveAs(fileName, Excel.XlFileFormat.xlHtml, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
case "CSV":
{
workBook.SaveAs(fileName, Excel.XlFileFormat.xlCSV, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
case "TEXT":
{
workBook.SaveAs(fileName, Excel.XlFileFormat.xlHtml, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
default:
{
workBook.SaveAs(fileName, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
break;
}
}
}
catch (Exception e)
{
throw e;
}
finally
{
this.Quit();
}
}
#endregion
#endregion
#region 私有方法
/// <summary>
/// 结束Excel进程
/// </summary>
public void KillExcelProcess(bool bAll)
{
if (bAll)
{
Process[] myProcesses;
myProcesses = Process.GetProcessesByName("Excel");
//得不到Excel进程ID，暂时只能判断进程启动时间
foreach (Process myProcess in myProcesses)
{
myProcess.Kill();
continue;
}
}
else
{
KillSpecialExcel();
}
}
[DllImport("user32.dll", SetLastError = true)]
static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);
/// <summary>
/// 结束Excel进程(特殊方式)
/// </summary>
public void KillSpecialExcel()
{
try
{
if (excelApp != null)
{
int lpdwProcessId = 0;
GetWindowThreadProcessId((IntPtr)excelApp.Hwnd, out lpdwProcessId);
//c-s方式
if (lpdwProcessId > 0)
{
System.Diagnostics.Process.GetProcessById(lpdwProcessId).Kill();
}
else
{
Quit();
}
}
}
catch { }
}
/// <summary>
/// 退出
/// </summary>
public void Quit()
{
if (workBook != null)
workBook.Close(null, null, null);
if (excelApp != null)
{
excelApp.Workbooks.Close();
excelApp.Quit();
}
if (range != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(range);
range = null;
}
if (range1 != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(range1);
range1 = null;
}
if (range2 != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(range2);
range2 = null;
}
if (textBox != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(textBox);
textBox = null;
}
if (workSheet != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(workSheet);
workSheet = null;
}
if (workBook != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(workBook);
workBook = null;
}
if (excelApp != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
excelApp = null;
}
GC.Collect();
}//end Quit
#endregion
}
}