C#操作excel打印

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 = ; i < ; i++)
            {
                DataColumn dc = new DataColumn();
                dc.ColumnName = "name" + i;
                dc.DataType = typeof(string);
                dt.Columns.Add(dc);
            }
            for (int i = ; i < ; i++)
            {
                DataRow dr = dt.NewRow();
                if (i %  == )
                {
                    dr[] = "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[] = "测试用例" + i + "号";
                }
                for (int j = ; j < ; 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[]; //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 = ; i < rowNum; i++)
            {
                for (int j = ; j < columnNum; j++)
                {
                    workSheet.Cells[i + , j + ] = 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 = ; //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 =  / 0.035; //左边距为2cm
            workSheet.PageSetup.RightMargin =  / 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 = ;
            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(); //合并方法，0的时候直接合并为一个单元格
            range.Font.Size = ; //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 = ;
            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 = ; //填充颜色
            range.Cells.Borders.LineStyle = ; //设置单元格边框的粗细
 
            return true;
        }
    }
}