调试易

 public void myDataGridViewToExcel(DataGridView dgv)//从DataGridView导出到excel
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Filter = "Execl文件 (*.xls)|*.xls";
            saveFileDialog.FilterIndex = 0;
            saveFileDialog.RestoreDirectory = true;
            //为true时每次都是从软件目录开始选择
            saveFileDialog.Title = "导出到";
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                Stream myStream;
                myStream = saveFileDialog.OpenFile();
                //应该不会是编码的问题，全部我都试过了
                StreamWriter sw = new StreamWriter(myStream, UnicodeEncoding.Default);
                //StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding("gb2312"));
                string str = "";
                try
                {
                    //这个循环写标题
                    for (int i = 0; i < dgv.ColumnCount; i++)
                    {
                        if (i > 0)
                        {
                            str += "\t";
                        }
                        str += dgv.Columns[i].HeaderText;
                    }
                    sw.WriteLine(str);
                    string tempStr = "";
                    for (int j = 0; j < dgv.Rows.Count - 1; j++)
                    {
                        //string tempStr = "";
                        for (int k = 0; k < dgv.Columns.Count; k++)
                        {
                            //这里首先把整行读出来再写进去
                            if (dgv.Rows[j].Cells[k].Value.ToString() == "")//判断是否为空
                            {
                                tempStr += "    ";
                            }
                            else
                            {
                                tempStr = dgv.Rows[j].Cells[k].Value.ToString();
                            }
                            sw.Write(tempStr);
                            sw.Write("\t");
                            tempStr = "";
                        }
                        sw.WriteLine();
                    }
                    MessageBox.Show("数据导出成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.ToString());
                }
                finally
                {
                    sw.Close();
                    myStream.Close();
                }
            }
        }

SaveFileDialog saveFileDialog = new SaveFileDialog();
这个需要导什么包？
谢谢

如果是将Excel文件导入到数据库怎么办？

excel自带了导入数据库的功能吧。印象当中，可以鼠标操作就可以了。
如果是excel里的数据导入界面，form app，网上应该很多。楼上那位写的就很好：）