RFID的winform程序心得

 /// 根据日期获取当周星期一
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime StartOfTheWeek(DateTime dt)
        {
            return dt.AddDays(-(Convert.ToInt16(dt.DayOfWeek)-1));
        }
        /// <summary>
        /// 根据日期获取当周末
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime EndOfTheWeek(DateTime dt)
        {
            return StartOfTheWeek(dt).AddDays(6);
        }
        /// <summary>
        ///根据日期获取月初日期
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime StartOfTheMonth(DateTime dt)
        {
            return new DateTime(dt.Year, dt.Month, 1);
        }
        /// <summary>
        /// 根据日期获取月底日期
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime EndOfTheMonth(DateTime dt)
        {
            return StartOfTheMonth(dt).AddMonths(1).AddDays(-1);
        }
        /// <summary>
        /// 感觉日期年初日期
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime StartOfTheYear(DateTime dt)
        {
            return new DateTime(dt.Year, 1, 1);
        }

        /// <summary>
        /// 根据日期获取年底日期
         /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static DateTime EndOfTheYear(DateTime dt)
        {
            return StartOfTheYear(dt).AddYears(1).AddDays(-1);
        }

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/**//// <summary>   
    /// 常用方法，列之间加\t，一行一行输出，此文件其实是csv文件，不过默认可以当成Excel打开。   
    /// </summary>   
    /// <remarks>   
    /// using System.IO;   
    /// </remarks>   
    /// <param name="dgv"></param>   
    private void DataGridViewToExcel(DataGridView dgv)
    {
        SaveFileDialog dlg = new SaveFileDialog();
        dlg.Filter = "Execl files (*.xls)|*.xls";
        dlg.FilterIndex = 0;
        dlg.RestoreDirectory = true;
        dlg.CreatePrompt = true;
        dlg.Title = "保存为Excel文件";

        if (dlg.ShowDialog() == DialogResult.OK)
        {
            Stream myStream;
            myStream = dlg.OpenFile();
            StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
            string columnTitle = "";
            try
            {
                //写入列标题   
                for (int i = 0; i < dgv.ColumnCount; i++)
                {
                    if (i > 0)
                    {
                        columnTitle += "\t";
                    }
                    columnTitle += dgv.Columns[i].HeaderText;
                }
                sw.WriteLine(columnTitle);

                //写入列内容   
                for (int j = 0; j < dgv.Rows.Count; j++)
                {
                    string columnValue = "";
                    for (int k = 0; k < dgv.Columns.Count; k++)
                    {
                        if (k > 0)
                        {
                            columnValue += "\t";
                        }
                        if (dgv.Rows[j].Cells[k].Value == null)
                            columnValue += "";
                        else
                            columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();
                    }
                    sw.WriteLine(columnValue);
                }
                sw.Close();
                myStream.Close();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.ToString());
            }
            finally
            {
                sw.Close();
                myStream.Close();
            }
        }
    }

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 /// <summary>
        /// 将DataGridView中的数据导入到Excel中
        /// </summary>
        /// <param name="dt">DataGridView</param>
        /// <param name="templatePath">模板的路径</param>
        /// <param name="excelName">导入Excel的路径</param>
        /// <returns></returns>
        public static bool DataGridViewToExcel(DataGridView dg, string templatePath, string excelName)
        {
            bool result = true;
            XmlDocument xmlDoc = new XmlDocument();
            if (File.Exists(templatePath))
            {
                xmlDoc.Load(templatePath);
                XmlNode root = xmlDoc.SelectSingleNode(@"/*[local-name()='Workbook']/*[local-name()='Worksheet'][1]/*[local-name()='Table']");
                foreach (DataGridViewRow dgRow in dg.Rows)
                {
                    XmlElement row = xmlDoc.CreateElement("", "Row", "urn:schemas-microsoft-com:office:spreadsheet");
                    row.SetAttribute("AutoFitHeight", "urn:schemas-microsoft-com:office:spreadsheet", "0");
                    foreach (DataGridViewColumn dgcol in dg.Columns)
                    {
                        if (dgcol.Visible && dgcol.IsDataBound && dgcol.GetType().Name == "DataGridViewTextBoxColumn")
                        {
                            XmlElement cell = xmlDoc.CreateElement("", "Cell", "urn:schemas-microsoft-com:office:spreadsheet");
                            XmlElement data = xmlDoc.CreateElement("", "Data", "urn:schemas-microsoft-com:office:spreadsheet");
                            data.SetAttribute("Type", "urn:schemas-microsoft-com:office:spreadsheet", "String");
                            data.InnerText = StringUility.ReturnFormatString(dgRow.Cells[dgcol.Name].Value);
                            cell.AppendChild(data);
                            row.AppendChild(cell);
                        }
                    }
                    //root.InsertBefore(row, root.LastChild);
                    root.AppendChild(row);
                }

                #region 添加合计行
                XmlElement totalRow = xmlDoc.CreateElement("", "Row", "urn:schemas-microsoft-com:office:spreadsheet");
                totalRow.SetAttribute("AutoFitHeight", "urn:schemas-microsoft-com:office:spreadsheet", "0");
                for (int i = 0; i < 2; i++)
                {
                    XmlElement cell = xmlDoc.CreateElement("", "Cell", "urn:schemas-microsoft-com:office:spreadsheet");
                    XmlElement data = xmlDoc.CreateElement("", "Data", "urn:schemas-microsoft-com:office:spreadsheet");
                    data.SetAttribute("Type", "urn:schemas-microsoft-com:office:spreadsheet", i == 0 ? "String" : "Number");
                    data.InnerText =(i==0?"合计":dg.Rows.Count.ToString());
                    cell.AppendChild(data);
                    totalRow.AppendChild(cell);
                }
                root.AppendChild(totalRow);
                #endregion

                XmlNode countnode = xmlDoc.SelectSingleNode(@"/*[local-name()='Workbook']/*[local-name()='Worksheet'][1]/*[local-name()='Table']");
                countnode.Attributes["ss:ExpandedRowCount"].Value = (Int32.Parse(countnode.Attributes["ss:ExpandedRowCount"].Value) + dg.Rows.Count+1).ToString();//标题+合计+数据
                xmlDoc.Save(excelName);
                result = true;
            }
            else
            {
                result = false;
            }
            return result;
        }

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