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C#操作excel打印的示例

C#教程 2022-01-01
using System;
using System.Data;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
using Microsoft.Office.Core;
using Excel = Microsoft.Office.Interop.Excel;

namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    private bool isStartPrint = false;

    public Form1()
    {
      InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
      //string OriginalPath = Path.GetDirectoryName(Application.ExecutablePath) + "\\IMS.accdb";
      ////初始化数据库
      //DataBase.OleDbObject.InitDatabase(OriginalPath);
      //DataBase.OleDbObject.OpenDb();
      //int k=DataBase.OleDbObject.Select("select * from ElementInventory").Rows.Count;

      //初始化要写入Excel的数据
      DataTable dt = new DataTable();
      for (int i = 0; i < 11; i++)
      {
        DataColumn dc = new DataColumn();
        dc.ColumnName = "name" + i;
        dc.DataType = typeof(string);
        dt.Columns.Add(dc);
      }
      for (int i = 0; i < 30; i++)
      {
        DataRow dr = dt.NewRow();
        if (i % 2 == 0)
        {
          dr[0] = "测试用例" + i + "号,开始测试是否自动换行,以及页面高度自适应。";
        }
        else
        {
          dr[0] = "测试用例" + i + "号";
        }
        for (int j = 1; j < 11; j++)
        {
          dr[j] = j;
        }
        dt.Rows.Add(dr);
      }
      if (!isStartPrint)
      {
        Thread th = new Thread(delegate ()
        {
          DataTabletoExcel(dt, "测试.xlsx");
        });
        th.Start();
        isStartPrint = true;
      }
      else
      {
        MessageBox.Show("打印程序已启用,请稍后……", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
      }
      //DataTabletoExcel(dt, "测试.xlsx");
    }

    public void DataTabletoExcel(System.Data.DataTable dtTemp, string strFileName)
    {
      int rowNum = dtTemp.Rows.Count; //先得到dtTemp的行数
      int columnNum = dtTemp.Columns.Count; //列数
      Excel.Application ExcelApp = new Excel.Application(); //声明一个应用程序类实例

      //ExcelApp.DefaultFilePath = ""; //默认文件路径导出excel的路径还是在参数strFileName里设置
      //ExcelApp.DisplayAlerts = true;
      //ExcelApp.SheetsInNewWorkbook = 1;///返回或设置 Microsoft Excel 自动插入到新工作簿中的工作表数目。
      Excel.Workbook worksBook = ExcelApp.Workbooks.Add(); //创建一个新工作簿
      Excel.Worksheet workSheet = (Excel.Worksheet)worksBook.Worksheets[1]; //在工作簿中得到sheet。
      if (workSheet == null)
      {
        System.Diagnostics.Debug.WriteLine("ERROR: worksheet == null");
        return;
      }
      workSheet.Name = "测试Sheet1"; //工作表的名称
      workSheet.Cells.WrapText = true; //设置所有列的文本自动换行
      workSheet.Cells.EntireRow.AutoFit(); //设置所有列自动调整行高
      #region 绘制列
      ///自定义方法,向sheet中绘制列
      RangeMark(workSheet, "A1", "A2", "合并竖列1");
      RangeMark(workSheet, "B1", "B2", "合并竖列2");
      RangeMark(workSheet, "C1", "C2", "合并竖列3");
      RangeMark(workSheet, "D1", "D2", "合并竖列4");
      RangeMark(workSheet, "E1", "E2", "合并竖列5");
      RangeMark(workSheet, "F1", "H1", "合并横行1");
      RangeMark(workSheet, "F2", "F2", "合并横行1.1");
      RangeMark(workSheet, "G2", "G2", "合并横行1.2");
      RangeMark(workSheet, "H2", "H2", "合并横行1.3");
      RangeMark(workSheet, "I1", "K1", "合并横行2");
      RangeMark(workSheet, "I2", "J2", "合并横行2.1");
      RangeMark(workSheet, "K2", "K2", "合并横行2.2");
      #endregion
      //将DataTable中的数据导入Excel中
      for (int i = 0; i < rowNum; i++)
      {
        for (int j = 0; j < columnNum; j++)
        {
          workSheet.Cells[i + 3, j + 1] = dtTemp.Rows[i][j].ToString(); //文本

        }
      }
      ///保存路径
      string filePath = @"C:\Users\Admin\Desktop\" + strFileName;
      if (File.Exists(filePath))
      {
        try
        {
          File.Delete(filePath);
        }
        catch (Exception)
        {

        }
      }
      ExcelApp.Visible = true;
      //------------------------打印页面相关设置--------------------------------
      workSheet.PageSetup.PaperSize = Excel.XlPaperSize.xlPaperA4;//纸张大小
      workSheet.PageSetup.Orientation = Excel.XlPageOrientation.xlLandscape;//页面横向
                                         //workSheet.PageSetup.Zoom = 75; //打印时页面设置,缩放比例百分之几
      workSheet.PageSetup.Zoom = false; //打印时页面设置,必须设置为false,页高,页宽才有效
      workSheet.PageSetup.FitToPagesWide = 1; //设置页面缩放的页宽为1页宽
      workSheet.PageSetup.FitToPagesTall = false; //设置页面缩放的页高自动
      workSheet.PageSetup.LeftHeader = "Nigel";//页面左上边的标志
      workSheet.PageSetup.CenterFooter = "第 &P 页,共 &N 页";//页面下标
      workSheet.PageSetup.PrintGridlines = true; //打印单元格网线
      workSheet.PageSetup.TopMargin = 1.5 / 0.035; //上边距为2cm(转换为in)
      workSheet.PageSetup.BottomMargin = 1.5 / 0.035; //下边距为1.5cm
      workSheet.PageSetup.LeftMargin = 2 / 0.035; //左边距为2cm
      workSheet.PageSetup.RightMargin = 2 / 0.035; //右边距为2cm
      workSheet.PageSetup.CenterHorizontally = true; //文字水平居中
                              //------------------------打印页面设置结束--------------------------------
                              ///http://blog.csdn.net/wanmingtom/article/details/6125599
      worksBook.PrintPreview(); //打印预览
                   //worksBook.PrintOutEx(); //直接打印
                   //worksBook.Close(); //关闭工作空间
                   //ExcelApp.Quit(); //退出程序
                   //workSheet.SaveAs(filePath); //另存表
      KillProcess(ExcelApp); //杀掉生成的进程
      isStartPrint = false; //打印完毕
      GC.Collect(); //垃圾回收机制
    }
    /// <summary>
    /// 引用Windows句柄,获取程序PID
    /// </summary>
    /// <param name="Hwnd"></param>
    /// <param name="PID"></param>
    /// <returns></returns>
    [DllImport("User32.dll")]
    public static extern int GetWindowThreadProcessId(IntPtr Hwnd, out int PID);
    /// <summary>
    /// 杀掉生成的进程
    /// </summary>
    /// <param name="AppObject">进程程对象</param>
    private static void KillProcess(Excel.Application AppObject)
    {
      int Pid = 0;
      IntPtr Hwnd = new IntPtr(AppObject.Hwnd);
      System.Diagnostics.Process p = null;
      try
      {
        GetWindowThreadProcessId(Hwnd, out Pid);
        p = System.Diagnostics.Process.GetProcessById(Pid);
        if (p != null)
        {
          p.Kill();
          p.Dispose();
        }
      }
      catch (Exception ex)
      {
        System.Diagnostics.Debug.WriteLine("进程关闭失败!异常信息:" + ex);
      }
    }

    /// <summary>
    /// 创建表头单元格,包括合并单元格
    /// </summary>
    /// <param name="workSheet">工作表</param>
    /// <param name="startCell">单元格起始格编号</param>
    /// <param name="endCell">单元格结束编号</param>
    /// <param name="strText">单元格名称</param>
    private static bool RangeMark(Excel.Worksheet workSheet, string startCell, string endCell, string strText)
    {
      //创建一个区域对象。第一个参数是开始格子号,第二个参数是终止格子号。比如选中A1——D3这个区域。
      Excel.Range range = (Excel.Range)workSheet.get_Range(startCell, endCell);
      if (range == null)
      {
        System.Diagnostics.Debug.WriteLine("ERROR: range == null");
        return false;
      }
      range.Merge(0); //合并方法,0的时候直接合并为一个单元格
      range.Font.Size = 16; //字体大小
      range.Font.Name = "黑体"; //字体
      range.WrapText = true; //文本自动换行
      range.EntireRow.AutoFit(); //自动调整行高
                    //range.RowHeight = 20; 
                    //range.EntireColumn.AutoFit(); //自动调整列宽
      range.ColumnWidth = 15;
      range.HorizontalAlignment = XlVAlign.xlVAlignCenter; //横向居中
      range.Value = strText; //合并单元格之后,设置其中的文本
      range.Interior.ColorIndex = 20; //填充颜色
      range.Cells.Borders.LineStyle = 1; //设置单元格边框的粗细

      return true;
    }
  }
}

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