C#生成Excell代码

应导入的命名空间：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.SqlClient;using Microsoft.Office.Interop.Excel;using ExcelApplication = Microsoft.Office.Interop.Excel.ApplicationClass;using Microsoft.Win32;using System.IO;using System.Reflection;

生成部分：

     private void button2_Click(object sender, EventArgs e)        {            //申明保存对话框                           SaveFileDialog dlg = new SaveFileDialog();            //默然文件后缀                        dlg.DefaultExt = "xls ";            //文件后缀列表                           dlg.Filter = "EXCEL文件(*.XLS)|*.xls ";            //默然路径是系统当前路径                           dlg.InitialDirectory = Directory.GetCurrentDirectory();                        //打开保存对话框               if (dlg.ShowDialog() == DialogResult.Cancel) return;            //返回文件路径               string fileNameString = dlg.FileName;                        //验证strFileName是否为空或值无效               if (fileNameString.Trim() == " ") return;             //定义表格内数据的行数和列数               int rowscount = dataGridView1.Rows.Count;            int colscount = dataGridView1.Columns.Count;            //行数必须大于0               if ( rowscount <= 0 )            {                MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);                return;            }            //列数必须大于0               if (colscount <= 0)            {                MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);                return;            }            //行数不可以大于65536               if (rowscount > 65536)            {                MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);                return;            }            //列数不可以大于255               if (colscount > 255)            {                MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);                return;            }            //验证以fileNameString命名的文件是否存在，如果存在删除它               FileInfo file = new FileInfo(fileNameString);            if (file.Exists)            {                try                {                    file.Delete();                }                catch (Exception error)                {                    MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);                    return;                }            }            //创建空EXCEL对象            Microsoft.Office.Interop.Excel.Application objExcel = null;            Microsoft.Office.Interop.Excel.Workbook objWorkbook = null;            Microsoft.Office.Interop.Excel.Worksheet objSheet = null;            try            {                //申明对象                   objExcel = new Microsoft.Office.Interop.Excel.Application();                objWorkbook = objExcel.Workbooks.Add(Missing.Value);                objSheet = (Microsoft.Office.Interop.Excel.Worksheet)objWorkbook.ActiveSheet;//强制类型转换                //设置EXCEL不可见(后台运行)                   objExcel.Visible = false;                //向Excel中写入表格的表头                   int displayColumnsCount = 1;                for (int i = 0; i <= dataGridView1.ColumnCount - 1; i++)                {                    if (dataGridView1.Columns[i].Visible == true)                    {                        objExcel.Cells[1, displayColumnsCount] = dataGridView1.Columns[i].HeaderText.Trim();                        displayColumnsCount++;                    }                }                 //向Excel中逐行逐列写入表格中的数据                   for (int row = 0; row <= dataGridView1.RowCount - 1; row++)                {                    displayColumnsCount = 1;                    for (int col = 0; col < colscount; col++)                    {                        if (dataGridView1.Columns[col].Visible == true)                        {                            try                            {                                objExcel.Cells[row + 2, displayColumnsCount] = dataGridView1.Rows[row].Cells[col].Value.ToString().Trim();                                displayColumnsCount++;                            }                            catch (Exception)                            {                            }                        }                    }                }                //保存文件                   objWorkbook.SaveAs(fileNameString, Missing.Value, Missing.Value, Missing.Value, Missing.Value,                        Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared, Missing.Value, Missing.Value, Missing.Value,                        Missing.Value, Missing.Value);            }            catch (Exception error)            {                MessageBox.Show(error.Message, "警告 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);                return;            }            finally            {                //关闭Excel应用                   if (objWorkbook != null) objWorkbook.Close(Missing.Value, Missing.Value, Missing.Value);                if (objExcel.Workbooks != null) objExcel.Workbooks.Close();                if (objExcel != null) objExcel.Quit();                objSheet = null;                objWorkbook = null;                objExcel = null;            }            MessageBox.Show(fileNameString + "\n\n导出完毕! ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);                }    }