using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Reflection;
namespace ExcelPrj
{
    /// <summary>
    /// Excel 系统中的主文件Excel.exe 本身就是 COM 组件,通过在.NET 项目中引用Exel.exe 文件可以实现对Excel 的功能控制
    /// 与COM 组件相互操作是通过使用"包装类"(Wrapper Class) 和"代理"(Proxy) 的机制实现的.包装类使.NET 程序可以识别COM 组件提供的接口,而代理类则是提供对 COM 接口的访问
    /// </summary>
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            ExportTasks(Bind(), dataGridView1);
        }
        //如果 Excel 安装在计算机上,侧导出表格内容到 Excel
        public void ExportTasks(DataSet TasksData, DataGridView TasksGridView)
        {
            // 定义要使用的Excel 组件接口
            // 定义Application 对象,此对象表示整个Excel 程序
            Microsoft.Office.Interop.Excel.Application excelApp = null ;
            // 定义Workbook对象,此对象代表工作薄
            Microsoft.Office.Interop.Excel.Workbook workBook;
            // 定义Worksheet 对象,此对象表示Execel 中的一张工作表
            Microsoft.Office.Interop.Excel.Worksheet ws=null;
            //定义Range对象,此对象代表单元格区域
            Microsoft.Office.Interop.Excel.Range r;

            int row = 1; int cell = 1;
            try
            {
               //初始化 Application 对象 excelApp
                excelApp = new Microsoft.Office.Interop.Excel.Application();
                //在工作薄的第一个工作表上创建任务列表
                workBook = excelApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);

                ws =(Worksheet)workBook.Worksheets[1];

                // 命名工作表的名称为 "Task Management"
                ws.Name = "Task Management";

                #region 创建表格的列头
                // 遍历数据表中的所有列
                foreach (DataGridViewColumn cs in TasksGridView.Columns)
                {
                    // 假如并不想把主键也显示出来
                    if (cs.HeaderText != "编号")
                    {
                        ws.Cells[row, cell] = cs.HeaderText;
                        r = (Range)ws.Cells[row, cell];

                        ws.get_Range(r, r).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;
              
                        //此处用来设置列的样式
                        cell++;
                    }
                }
            
                // 创建行,把数据视图记录输出到对应的Excel 单元格
                for (int i = 2; i < TasksData.Tables[0].Rows.Count; i++)
                {
                    for (int j = 1; j < TasksData.Tables[0].Columns.Count; j++)
                    {
                       
                        ws.Cells[i, j] = TasksData.Tables[0].Rows[i][j].ToString();
                       // r = (Range)ws.Cells[i,j];

                        Range rg = (Range)ws.get_Range(ws.Cells[i, j], ws.Cells[i, j]);
                        rg.EntireColumn.ColumnWidth = 20;
                   //     rg.Columns.AutoFit();
                        rg.NumberFormatLocal = "@";
                    }

                }
                #endregion
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
           
            //显示 Excel
            excelApp.Visible = true;         
           
        }

        private void button5_Click(object sender, EventArgs e)
        {
            DataSet ds = Bind();
            dataGridView1.DataSource = ds.Tables[0];
        }
        private DataSet Bind()
        {
            SqlConnection conn = new SqlConnection("Server=.;Database=testManage;Integrated Security=SSPI");
            SqlDataAdapter da = new SqlDataAdapter("select FNumber,FExamNum,FName,FSex,FJobAdd,FCardID,FBirDate from stuInfo", conn);
            DataSet ds = new DataSet();
            da.Fill(ds);
            return ds;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Title = "请选择将导出的EXCEL文件存放路径";
            sfd.FileName = System.DateTime.Now.ToShortDateString() + "-学生信息";
            sfd.Filter = "Excel文档(*.xls)|*.xls";
            sfd.ShowDialog();
          
            if (sfd.FileName != "")
            {
               
                Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
                if (excelApp == null)
                {
                    MessageBox.Show("无法创建Excel对象，可能您的机器未安装Excel");
                }
                else
                {
                    Microsoft.Office.Interop.Excel.Workbooks workbooks = excelApp.Workbooks;
                    Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
                    Microsoft.Office.Interop.Excel.Worksheet worksheet =(Worksheet) workbook.Worksheets[1];
                    DataSet ds=Bind();
                    for (int i = 1; i < ds.Tables[0].Rows.Count; i++)
                    {
                        for (int j = 1; j < ds.Tables[0].Columns.Count;j++ )
                        {
                            if (i == 1)
                            {
                                worksheet.Cells[i, j] = dataGridView1.Columns[j].HeaderText;
                               
                            }
                            worksheet.Cells[i+1, j] = ds.Tables[0].Rows[i][j].ToString();
                        }
                    }
                    //保存方式一：保存WorkBook
                      //workbook.SaveAs(@"F:\CData.xls",
                      // Missing.Value,Missing.Value,Missing.Value,Missing.Value,Missing.Value,
                      // Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,Missing.Value,Missing.Value,Missing.Value,
                      // Missing.Value,Missing.Value);

                      //保存方式二：保存WorkSheet
                      // worksheet.SaveAs(@"F:\CData2.xls",
                      // Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                      // Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

                     ////保存方式三
                     //workbook.Saved = true;
                     //workbook.SaveCopyAs(sfd.FileName);
               

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
                    worksheet = null;
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
                    workbook = null;
                    workbooks.Close();
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);
                    workbooks = null;
                    excelApp.Quit();
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
                    excelApp = null;
                    MessageBox.Show("导出Excel完成!");
                }
            }

         
        }
        private void button4_Click(object sender, EventArgs e)
        {
            string strExcelFileName = @"F:\\2007-07-16-学生信息.xls";
            string strSheetName = "sheet1";

            #region Aspnet 操作Excel  正确
            ////源的定义
            //string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + strExcelFileName + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";

            ////Sql语句
            //string strExcel = "select * from  [" + strSheetName + "$]";

            ////定义存放的数据表
            //DataSet ds = new DataSet();

            ////连接数据源
            //OleDbConnection conn = new OleDbConnection(strConn);

            //conn.Open();

            ////适配到数据源
            //OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);
            //adapter.Fill(ds,"res");

            //conn.Close();

            //// 一般的情况下. Excel  表格的第一行是列名
            //dataGridView2.DataSource = ds.Tables["res"];
            #endregion

            #region COM 组件读取复杂Excel
            Microsoft.Office.Interop.Excel.Application excelApp = null;
            Microsoft.Office.Interop.Excel.Workbook workBook;
            Microsoft.Office.Interop.Excel.Worksheet ws = null;

            try
            {
                excelApp = new Microsoft.Office.Interop.Excel.Application();
                workBook = excelApp.Workbooks.Open(@"F:\\Book1.xls", Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
                ws = (Worksheet)workBook.Worksheets[1];

                        
                //Excel 默认为 256 列..
                MessageBox.Show(ws.Cells.Columns.Count.ToString());
                excelApp.Quit();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            #endregion
        }
    }
}