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using System;using System.Collections.Generic;
using System.Windows.Forms;
using System.Text;
using System.Diagnostics;
using System.IO;
using Microsoft.Office.Interop.Excel;

namespace SalesListDownload
{
    public class Export
    {
        public static void ExportExcel(string fileName, DataGridView myDGV)
        {

            if (myDGV.Rows.Count > 0)
            {
                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
                if (xlApp == null)
                {
                    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
                    return;
                }

                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1

                //写入标题
                for (int i = 0; i < myDGV.ColumnCount; i++)
                {
                    worksheet.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;
                }
                for (int i = 1; i <= myDGV.ColumnCount; ++i)
                {
                    Microsoft.Office.Interop.Excel.Range setrange = worksheet.get_Range(worksheet.Cells[1, i], worksheet.Cells[myDGV.RowCount, i]);
                    setrange.NumberFormatLocal = "@";//设置数字文本格式
                }
                //写入数值
                for (int r = 0; r < myDGV.Rows.Count; r++)
                {
                    for (int i = 0; i < myDGV.ColumnCount; i++)
                    {
                        worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;
                    }
                    System.Windows.Forms.Application.DoEvents();
                }
                worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
                //if (Microsoft.Office.Interop.cmbxType.Text != "Notification")
                //{
                //    Excel.Range rg = worksheet.get_Range(worksheet.Cells[2, 2], worksheet.Cells[ds.Tables[0].Rows.Count + 1, 2]);
                //    rg.NumberFormat = "00000000";
                //}

                string saveFileName = fileName;
                if (saveFileName != "")
                {
                    try
                    {
                        workbook.Saved = true;
                        workbook.SaveCopyAs(saveFileName);
                        //fileSaved = true;
                    }
                    catch (Exception ex)
                    {
                        //fileSaved = false;
                        MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);
                    }

                }
                //else
                //{
                //    fileSaved = false;
                //}
                xlApp.Quit();
                GC.Collect();//强行销毁
                // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL
                MessageBox.Show(fileName + "的简明资料保存成功", "提示", MessageBoxButtons.OK);
            }
            else
            {
                MessageBox.Show("报表为空,无表格需要导出", "提示", MessageBoxButtons.OK);
            }
        }
    }
}