using Microsoft.Office.Interop.Excel;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Excel = Microsoft.Office.Interop.Excel;

namespace RS.Common
{
    public class MicrosoftExcel
    {
        public async void ExportToExcel(System.Data.DataTable dataTable, string path, int function)
        {
            await Task.Run(() =>
            {
                try
                {
                    // 创建Excel应用程序对象  
                    Excel.Application excelApp = new Excel.Application();
                    excelApp.Visible = false;

                    // 创建工作簿和工作表对象  
                    Excel.Workbook workbook = excelApp.Workbooks.Add();
                    Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];

                    if (function == 1)
                    {
                        worksheet.Cells[1, 1] = "编号";
                        worksheet.Cells[1, 2] = "作业配方";
                        worksheet.Cells[1, 3] = "批次";
                        worksheet.Cells[1, 4] = "产品id";
                        worksheet.Cells[1, 5] = "操作员";
                        worksheet.Cells[1, 6] = "片数";
                        worksheet.Cells[1, 7] = "完成状态";
                        worksheet.Cells[1, 8] = "开始时间";
                        worksheet.Cells[1, 9] = "结束时间";

                        // 添加数据行  
                        for (int i = 0; i < dataTable.Rows.Count; i++)
                        {
                            worksheet.Cells[i + 2, 1] = dataTable.Rows[i][dataTable.Columns[0].ColumnName];
                            worksheet.Cells[i + 2, 2] = dataTable.Rows[i][dataTable.Columns[1].ColumnName];
                            worksheet.Cells[i + 2, 3] = dataTable.Rows[i][dataTable.Columns[2].ColumnName];
                            worksheet.Cells[i + 2, 4] = dataTable.Rows[i][dataTable.Columns[3].ColumnName];
                            worksheet.Cells[i + 2, 5] = dataTable.Rows[i][dataTable.Columns[4].ColumnName];
                            worksheet.Cells[i + 2, 6] = dataTable.Rows[i][dataTable.Columns[5].ColumnName];
                            worksheet.Cells[i + 2, 7] = dataTable.Rows[i][dataTable.Columns[6].ColumnName];
                            worksheet.Cells[i + 2, 8] = dataTable.Rows[i][dataTable.Columns[7].ColumnName];
                            worksheet.Cells[i + 2, 9] = dataTable.Rows[i][dataTable.Columns[8].ColumnName];
                        }
                    }
                    else if (function == 2)
                    {
                        worksheet.Cells[1, 1] = "报警编号";
                        worksheet.Cells[1, 2] = "报警内容";
                        worksheet.Cells[1, 3] = "报警时间";
                        worksheet.Cells[1, 4] = "恢复时间";

                        // 添加数据行  
                        for (int i = 0; i < dataTable.Rows.Count; i++)
                        {
                            worksheet.Cells[i + 2, 1] = dataTable.Rows[i][dataTable.Columns[0].ColumnName];
                            worksheet.Cells[i + 2, 2] = dataTable.Rows[i][dataTable.Columns[1].ColumnName];
                            worksheet.Cells[i + 2, 3] = dataTable.Rows[i][dataTable.Columns[2].ColumnName];
                            worksheet.Cells[i + 2, 4] = dataTable.Rows[i][dataTable.Columns[3].ColumnName];
                        }
                    }
                    else
                    {
                        worksheet.Cells[1, 1] = "操作时间";
                        worksheet.Cells[1, 2] = "操作用户";
                        worksheet.Cells[1, 3] = "操作信息";

                        // 添加数据行  
                        for (int i = 0; i < dataTable.Rows.Count; i++)
                        {
                            worksheet.Cells[i + 2, 1] = dataTable.Rows[i][dataTable.Columns[0].ColumnName];
                            worksheet.Cells[i + 2, 2] = dataTable.Rows[i][dataTable.Columns[1].ColumnName];
                            worksheet.Cells[i + 2, 3] = dataTable.Rows[i][dataTable.Columns[2].ColumnName];
                        }
                    }

                    worksheet.StandardWidth = 15;
                    // 设置单元格格式，防止科学计数法  
                    Range range = worksheet.get_Range("A2", "A" + (dataTable.Rows.Count + 1).ToString());
                    range.NumberFormat = "@"; // 文本格式，或者你可以使用 "0.00" 或其他数字格式                      

                    // 保存并关闭工作簿  
                    workbook.SaveAs(path);
                    workbook.Close();

                    // 释放COM对象并退出Excel应用程序  
                    ReleaseObject(worksheet);
                    ReleaseObject(workbook);
                    excelApp.Quit();
                }
                catch (Exception ex)
                {
                    ex.ToString();
                }
            });
        }

        private void ReleaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                Console.WriteLine("Exception Occurred while releasing object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }
    }
}