本文摘自PHP中文网，作者php是最好的语言，侵删。

前言

在大多数窗体中都有导出Excel表格的功能，如果封装封装一个类，使用的时候直接调用这个类不是更方便？，这样还减少了代码的重复性，何乐而不为？

操作

首先添加引用，在com中选中microsoft office 16.0 object library，和microsoft Excel 16.0 object library。

添加命名空间：

using Microsoft.Office.Interop.Excel;//导出Excel
using Microsoft.Office.Core;
using System.Data.OleDb;
using System.Windows.Forms;

新建一个类并命名为outputExcel，代码如下：

public  class outputExcel
    {
        //导出excel
        public void RExcel(string name, DataGridView dgv)
        {
            //总可见行列数
            int rowCount = dgv.Rows.GetRowCount(DataGridViewElementStates.Visible);
            int colCount = dgv.Columns.GetColumnCount(DataGridViewElementStates.Visible);
 
            //如果没有数据
            if (dgv.Rows.Count == 0 || rowCount == 0)
            {
                MessageBox.Show("表中没有数据", "提示");
            }
            else
            {
                //创建文件的路径
                SaveFileDialog save = new SaveFileDialog();
                save.Filter = "excel files(*.xlsx)|*.xlsx";
                save.Title = "请选择要导出数据的位置";
                save.FileName = name + DateTime.Now.ToLongDateString();
 
                if (save.ShowDialog() == DialogResult.OK)
                {
                    string fileName = save.FileName;
 
                    //创建excel对象
                    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                    if (excel == null)
                    {
                        MessageBox.Show("Excel无法启动", "提示");
                        return;
                    }
 
                    //创建工作薄
                    Microsoft.Office.Interop.Excel.Workbook excelBook = excel.Workbooks.Add(true);
                    Microsoft.Office.Interop.Excel.Worksheet excelSheet = (Microsoft.Office.Interop.Excel.Worksheet)excelBook.Worksheets[1];
 
                    //生成字段名
                    int k = 0;
                    for (int i = 0; i < dgv.ColumnCount; i++)
                    {
                        if (dgv.Columns[i].Visible)//不导出隐藏列
                        {
                            excel.Cells[1, k + 1] = dgv.Columns[i].HeaderText;
                            k++;
                        }
                    }
 
                    //填充数据
                    for (int i = 0; i < dgv.RowCount; i++)
                    {
                        k = 0;
                        for (int j = 0; j < dgv.ColumnCount; j++)
                        {
                            if (dgv.Columns[j].Visible)//不导出隐藏的列
                            {
                                if (dgv[j, i].ValueType == typeof(string))
                                {
                                    excel.Cells[i + 2, k + 1] = "" + dgv[j, i].Value.ToString();
                                }
                                else
                                {
                                    excel.Cells[i + 2, k + 1] = dgv[j, i].Value.ToString();
                                }
                            }
                            k++;
                        }
                    }
 
                    try
                    {
                        excelBook.Saved = true;
                        excelBook.SaveCopyAs(fileName);
                        MessageBox.Show("导出成功！");
                    }
                    catch
                    {
                        MessageBox.Show("导出文件失败，文件可能正在使用中", "提示");
                    }
                }
            }
        }
 
 
    }

当窗体需要使用此功能时，需要写上以下代码即可：

private void btnoutExcel_Click(object sender, EventArgs e)
        {
            outputExcel form1 = new outputExcel();
            form1.RExcel("", dataGridView1);
 
        }