用c#实现把数据库表内容导出来生成“.xls”文件
用c#实现把数据库表内容导出来生成“.xls”文件
[解决办法]
http://www.cnblogs.com/top5/archive/2010/02/16/1668801.html
[解决办法]
用Aspose导出
[解决办法]
也可以试试 NPOI.DLL
[解决办法]
http://www.2cto.com/kf/201205/131076.html
[解决办法]

private void btnExcel_Click(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt = DBHelper.GetData("SELECT * FROM TBNAME");//此处获取你数据库中数据
            if (dt.Rows.Count > 0)
            {
                SaveFileDialog sd = new SaveFileDialog();
                sd.Filter = "(*.xls)
[解决办法]
*.xls";
                sd.FilterIndex = 0;
                sd.FileName = "filename.xls";
                sd.RestoreDirectory = true;
                sd.Title = "导出Excel";
                if (sd.ShowDialog() == DialogResult.OK)
                {
                    Stream sm;
                    sm = sd.OpenFile();
                    StreamWriter sw = new StreamWriter(sm, System.Text.Encoding.GetEncoding(-0));
                    string columnTitle = "";
                    try
                    {
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            if (i > 0) 
 
                            {
                                columnTitle += "\t";
                            }
                            columnTitle += dt.Columns[i].HeaderText;
                        }
                        sw.WriteLine(columnTitle);
                        for (int item = 0; item < dt.Rows.Count; item++)
                        {
                            string columnValue = "";
                            for (int cel = 0; cel < dt.Columns.Count; cel++)
                            {
                                if (cel > 0)
                                {
                                    columnValue += "\t";
                                }
                                columnValue += dt.Rows[item][cel.ToString().Trim();
                                }
                            }
                            sw.WriteLine(columnValue);
                        }
                        sw.Close(); 
 
                        sm.Close();
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                    finally
                    {
                        sm.Close();
                        sw.Close();
                    }
                }
            }
        }