C# 实用小类

 /// <summary>
       /// 汉字转换拼音
       /// </summary>
        /// <param name="PinYin"></param>
        ///
       /// <returns></returns>
        public string PinYin(string TextFF)
        {
            if (TextFF != "")
            {
                string Text = TextFF;
                string TTT = "";
                Regex reg = new Regex("[\u4e00-\u9fa5]+");
                foreach (Match v in reg.Matches(Text))
                {
                    TTT += v.ToString();
                }
                return TTT;
            }
            else
            {
                return "";
            }
        }
        /// <summary>
        /// 拼音转首字母
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public  string GetFirstPinyin(string str)
        {
            string r = string.Empty;
            foreach (char obj in str)
            {
                try
                {
                    ChineseChar chineseChar = new ChineseChar(obj);
                    string t = chineseChar.Pinyins[].ToString();
                    r += t.Substring(, );
                }
                catch
                {
                    r += obj.ToString();
                }
            }
            return r;
        }
        /// <summary>
        /// 汉字转拼音首字母
        /// </summary>
        /// <param name="HanZi"></param>
        /// <returns></returns>
        public  string HanZiZHuanFist(string HanZi)
        {
            string str = PinYin(HanZi);
            string r = string.Empty;
            foreach (char obj in str)
            {
                try
                {
                    ChineseChar chineseChar = new ChineseChar(obj);
                    string t = chineseChar.Pinyins[].ToString();
                    r += t.Substring(, );
                }
                catch
                {
                    r += obj.ToString();
                }
            }
            return r;
        }
        /// <summary>
        /// 路径
        /// </summary>
        /// <param name="ST"></param>
        /// <returns></returns>
        public System.Data.DataTable TableSS(string ST)
        {

            string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ST + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1'";
            OleDbConnection myConn = new OleDbConnection(strCon);
            string strCom = " SELECT * FROM [Sheet1$] ";
            myConn.Open();

            OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myConn);

            DataSet myDataSet = new DataSet();

            myCommand.Fill(myDataSet, "[Sheet1$]");

            myConn.Close();
            return myDataSet.Tables[];

        }
        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <param name="mydgv"></param>
        public void Excel导出(DataGridView mydgv)
        {
            if (mydgv.Rows.Count == )
            {
                MessageBox.Show(" 没有数据可供导出！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            else
            {

                SaveFileDialog savedialog = new SaveFileDialog();
                savedialog.DefaultExt = "xlsx";
                savedialog.Filter = "microsoft office execl files (*.xlsx)|*.xlsx";
                savedialog.FilterIndex = ;
                savedialog.RestoreDirectory = true;
                savedialog.Title = "导出数据到excel表格";
                savedialog.ShowDialog();
                if (savedialog.FileName.IndexOf(":") < ) return; //被点了取消
                //Microsoft.office.interop.excel.application xlapp = new microsoft.office.interop.excel.application();
                Microsoft.Office.Interop.Excel.Application xlapp = new Microsoft.Office.Interop.Excel.Application();
                if (xlapp == null)
                {
                    MessageBox.Show("可能您的机子未安装excel，无法创建excel对象！", "系统提示 ", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlapp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[];//取得sheet1  

                //定义表格内数据的行数和列数
                int rowscount = mydgv.Rows.Count;
                int colscount = mydgv.Columns.Count;
                //行数不可以大于65536
                if (rowscount > )
                {
                    MessageBox.Show("数据行记录超过65536行，不能保存！", "系统提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
                //列数不可以大于255
                if (colscount > )
                {
                    MessageBox.Show("数据列记录超过256列，不能保存！", "系统提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
                //写入大标题

                string ADD = "卫材基础信息 时间：" + DateTime.Now.ToShortDateString();

               for (int i = ; i < mydgv.ColumnCount; i++)
                {
                    worksheet.Cells[, i + ] = mydgv.Columns[i].HeaderText;
                }
                //写入数值
                for (int r = ; r < mydgv.Rows.Count - ; r++)
                {
                    for (int i = ; i < mydgv.ColumnCount; i++)
                    {
                        if (mydgv[i, r].ValueType == typeof(string))
                        {

                            worksheet.Cells[r + , i + ] = " " + mydgv.Rows[r].Cells[i].Value.ToString().Replace(" ", ""); ;//将长数值转换成文本
                        }
                        else
                        {
                            worksheet.Cells[r + , i + ] = " " + mydgv.Rows[r].Cells[i].Value.ToString().Replace(" ", ""); ;
                        }
                    }
                    System.Windows.Forms.Application.DoEvents();
                }
                worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
                if (savedialog.FileName != "")
                {
                    try
                    {
                        workbook.Saved = true;
                        workbook.SaveCopyAs(savedialog.FileName);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("导出文件时出错,文件可能正被打开！..." + ex.Message, "系统提示 ", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }

                }
                //GC.Collect();//强行销毁
                MessageBox.Show("数据导出成功！ ", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);

            }
        }
        /// <summary>
        /// 价格转汉字
        /// </summary>
        /// <param name="money"></param>
        /// <returns></returns>
        public static string JiaGeGetHanZi(decimal money)
        {
            string[] strArray;
            string str = "";
            string str2 = "";
            string str3 = money.ToString("0.00");
            switch (str3.Trim().Length)
            {
                case :
                    strArray = new string[] { str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] { str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] { str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] { str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] { str3[].ToString(), "w", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] { str3[].ToString(), "s", str3[].ToString(), "w", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f" };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] {
                        str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "w", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y", str3[].ToString(), "j",
                        str3[].ToString(), "f"
                     };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] {
                        str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "w", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "y",
                        str3[].ToString(), "j", str3[].ToString(), "f"
                     };
                    str = string.Concat(strArray);
                    break;

                case :
                    strArray = new string[] {
                        str3[].ToString(), "m", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s", str3[].ToString(), "w", str3[].ToString(), "q", str3[].ToString(), "b", str3[].ToString(), "s",
                        str3[].ToString(), "y", str3[].ToString(), "j", str3[].ToString(), "f"
                     };
                    str = string.Concat(strArray);
                    break;
            }
            for (int i = ; i < str.Trim().Length; i++)
            {
                switch (str[i])
                {
                    case '':
                        str2 = str2 + "零";
                        break;

                    case '':
                        str2 = str2 + "壹";
                        break;

                    case '':
                        str2 = str2 + "贰";
                        break;

                    case '':
                        str2 = str2 + "叁";
                        break;

                    case '':
                        str2 = str2 + "肆";
                        break;

                    case '':
                        str2 = str2 + "伍";
                        break;

                    case '':
                        str2 = str2 + "陆";
                        break;

                    case '':
                        str2 = str2 + "柒";
                        break;

                    case '':
                        str2 = str2 + "捌";
                        break;

                    case '':
                        str2 = str2 + "玖";
                        break;

                    case 'b':
                        str2 = str2 + "佰";
                        break;

                    case 'f':
                        str2 = str2 + "分";
                        break;

                    case 'j':
                        str2 = str2 + "角";
                        break;

                    case 'm':
                        str2 = str2 + "亿";
                        break;

                    case 'q':
                        str2 = str2 + "仟";
                        break;

                    case 's':
                        str2 = str2 + "拾";
                        break;

                    case 'w':
                        str2 = str2 + "万";
                        break;

                    case 'y':
                        str2 = str2 + "元";
                        break;
                }
            }
            return str2;
        }