コーディング中常に使用される共通関数

/// <summary>
        /// 年
        /// </summary>
        private const string MC_YEAR = "年";
        /// <summary>
        /// 月
        /// </summary>
        private const string MC_MONTH = "月";
        /// <summary>
        /// 日
        /// </summary>
        private const string MC_DAY = "日";
        /// <summary>
        /// NULL
        /// </summary>
        private const string MC_NULL = "NULL";
        /// <summary>
        /// =
        /// </summary>
        private const string MC_EQUAL = "=";

#region 共通チェックとデータ変換
        /// <summary>
        /// 和暦→西暦
        /// </summary>
        /// <param name="date"></param>
        /// <returns></returns>
        private string JACalendarToEN(object date)
        {
            string strRet = string.Empty;
            if (IsDBNullOrNullOrEmpty(date) == false)
            {
                System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("en-US");
                System.Globalization.Calendar cal = new System.Globalization.GregorianCalendar();
                ci.DateTimeFormat.Calendar = cal;
                strRet = DateTime.Parse(date.ToString()).ToString("yyyy/MM/dd", ci);
            }
            return strRet;
        }
        /// <summary>
        /// 西暦→和暦
        /// </summary>
        /// <param name="date"></param>
        /// <returns></returns>
        private string ENCalendarToJA(object date)
        {
            string strRet = string.Empty;
            if (IsDBNullOrNullOrEmpty(date) == false)
            {
                System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("ja-JP");
                System.Globalization.Calendar cal = new System.Globalization.JapaneseCalendar();
                ci.DateTimeFormat.Calendar = cal;
                strRet = DateTime.Parse(date.ToString()).ToString("ggy年MM月dd日", ci);
            }
            return strRet;
        }
        /// <summary>
        /// テキストボックス場合、DBデータへ変換
        /// </summary>
        /// <param name="strData"></param>
        /// <returns></returns>
        private string ConvertTxtToDBData(string strData)
        {
            string strRet = MC_NULL;
            if (!string.IsNullOrEmpty(strData))
            {
                strRet = this.ChangeString(strData);
            }
            return strRet;
        }
        /// <summary>
        /// 日付場合、DBデータへ変換
        /// </summary>
        /// <param name="strData"></param>
        /// <returns></returns>
        private string ConvertDateToDBData(string strData)
        {
            string strRet = MC_NULL;
            if (!string.IsNullOrEmpty(strData))
            {
                strRet = this.JACalendarToEN(strData);
            }
            return strRet;
        }
        /// <summary>
        /// コンボボックス場合、DBデータへ変換
        /// </summary>
        /// <param name="strData"></param>
        /// <returns></returns>
        private string ConvertCmbToDBData(object oData)
        {
            string strRet = MC_NULL;
            if (!IsDBNullOrNullOrEmpty(oData))
            {
                strRet = oData.ToString();
            }
            return strRet;
        }
        /// <summary>
        /// コンボボックス場合、コンボボックスvalueデータへ変換
        /// </summary>
        /// <param name="strData"></param>
        /// <returns></returns>
        private object ConvertToCmbData(object oData)
        {
            object oRet = DBNull.Value;
            if (IsDBNullOrNullOrEmpty(oData) == false)
            {
                oRet = oData;
            }
            return oRet;
        }
        /// <summary>
        /// チェックボックス場合、DBデータへ変換
        /// </summary>
        /// <param name="strData"></param>
        /// <returns></returns>
        private string ConvertChkToDBData(bool bData)
        {
            return Convert.ToInt32(bData).ToString();
        }
        /// <summary>
        /// 文字列取得
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private string ConvertToStringData(object oData)
        {
            string strRet = string.Empty;
            if (IsDBNullOrNullOrEmpty(oData) == false)
            {
                strRet = oData.ToString();
            }
            return strRet;
        }
        /// <summary>
        /// TRUE OR FALSE取得
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private bool ConvertToBoolData(object oData)
        {
            bool bRet = false;
            if (IsDBNullOrNullOrEmpty(oData) == false)
            {
                if (oData.ToString() == "1" || oData.ToString() == "0")
                {
                    bRet = oData.ToString() == "1" ? true : false;
                }
                else
                {
                    bRet = Convert.ToBoolean(oData);
                }
            }
            return bRet;
        }
        /// <summary>
        /// DBNull、Null、Emptyの判定
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private bool IsDBNullOrNullOrEmpty(object oData)
        {
            bool bRet = false;
            if (oData == DBNull.Value || oData == null || string.IsNullOrEmpty(oData.ToString().Trim()))
            {
                bRet = true;
            }
            return bRet;
        }
        /// <summary>
        /// 数字判定
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private bool IsNumber(object oData)
        {
            bool bRet = true;
            try
            {
                if (!IsDBNullOrNullOrEmpty(oData))
                {
                    double dblData = double.Parse(oData.ToString());
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        /// <summary>
        /// 数字判定（小数点を含まない）
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private bool IsNumberNotDot(object oData)
        {
            bool bRet = true;
            try
            {
                if (!IsDBNullOrNullOrEmpty(oData))
                {
                    if (oData.ToString().Contains("."))
                    {
                        bRet = false;
                    }
                    if (bRet)
                    {
                        double dblData = double.Parse(oData.ToString());
                    }
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        /// <summary>
        /// 郵便番号、電話番号判定
        /// </summary>
        /// <param name="oData"></param>
        /// <returns></returns>
        private bool IsPostCodeOrPhone(object oData)
        {
            bool bRet = true;
            try
            {
                if (!IsDBNullOrNullOrEmpty(oData))
                {
                    string strPostCodeOrPhone = oData.ToString().Replace("-", "");
                    if (!IsNumberNotDot(strPostCodeOrPhone))
                    {
                        bRet = false;
                    }
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        /// <summary>
        /// 数字また/
        /// </summary>
        /// <returns></returns>
        private bool IsDateKey(object oData)
        {
            bool bRet = true;
            try
            {
                if (!IsDBNullOrNullOrEmpty(oData))
                {
                    string strPostCodeOrPhone = oData.ToString().Replace("/", "");
                    if (!IsNumberNotDot(strPostCodeOrPhone))
                    {
                        bRet = false;
                    }
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        /// <summary>
        /// 画面上の和暦日付の取得
        /// </summary>
        /// <param name="cmbGengo"></param>
        /// <param name="txtNen"></param>
        /// <param name="txtTuki"></param>
        /// <param name="txtHi"></param>
        /// <returns></returns>
        private string GetControlDateData(ComboBox cmbGengo, TextBox txtNen, TextBox txtTuki, TextBox txtHi)
        {
            string strDate = string.Empty;
            strDate = cmbGengo.Text + txtNen.Text + txtTuki.Text + txtHi.Text;
            if (!string.IsNullOrEmpty(strDate)
                && !string.IsNullOrEmpty(cmbGengo.Text)
                && !string.IsNullOrEmpty(txtNen.Text)
                && !string.IsNullOrEmpty(txtTuki.Text)
                && !string.IsNullOrEmpty(txtHi.Text))
            {
                strDate = cmbGengo.Text + txtNen.Text + MC_YEAR + txtTuki.Text + MC_MONTH + txtHi.Text + MC_DAY;
            }
            return strDate;
        }
        /// <summary>
        /// 画面上の和暦日付のチェック
        /// </summary>
        /// <param name="strDate"></param>
        /// <returns></returns>
        private bool ChkControlJADateData(string strDate)
        {
            bool bRet = true;
            try
            {
                if (!string.IsNullOrEmpty(strDate))
                {
                    string strDateRet = this.JACalendarToEN(strDate);
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        /// <summary>
        /// 画面上の西暦日付のチェック
        /// </summary>
        /// <param name="strDate"></param>
        /// <returns></returns>
        private bool ChkControlENDateData(string strDate)
        {
            bool bRet = true;
            try
            {
                if (!string.IsNullOrEmpty(strDate))
                {
                    string strDateRet = this.ENCalendarToJA(strDate);
                }
            }
            catch
            {
                bRet = false;
            }
            return bRet;
        }
        #endregion
        #region SQL文作成共通
        /// <summary>
        /// 新規場合、追加ＳＱＬ文の作成
        /// </summary>
        /// <param name="strSqlInsCol"></param>
        /// <param name="strSqlInsVal"></param>
        private void GetInsertSQL(ref string strSqlInsCol, ref string strSqlInsVal)
        {
            string strSqlInsColRet = string.Empty;
            string strSqlInsValRet = string.Empty;
            string strCol = string.Empty;
            string strVal = string.Empty;
            //文字列場合、"'"追加と"'"を"''"に変更する
            //カラム
            strCol = "カラム列";
            this.SubAddCol(strCol, ref strSqlInsColRet);
            strVal = this.ConvertTxtToDBData("カラ'ム値");
            this.SubAddVal(this.SubAddPos(strVal), ref strSqlInsValRet);

            strSqlInsCol = strSqlInsColRet;
            strSqlInsVal = strSqlInsValRet;
        }
        /// <summary>
        /// 台帳編集場合、更新ＳＱＬ文の作成
        /// </summary>
        /// <param name="strSqlInsCol"></param>
        /// <param name="strSqlInsVal"></param>
        private void GetUpdateSQL(ref string strSqlUpdSet)
        {
            string strSqlUpdSetRet = string.Empty;
            string strCol = string.Empty;
            string strVal = string.Empty;

            //文字列場合、"'"追加と"'"を"''"に変更する
            //カラム
            strCol = "カラム列";
            strVal = this.ConvertTxtToDBData("カラム値");
            this.SubUpdSet(strCol, SubAddPos(strVal), ref strSqlUpdSetRet);

            strSqlUpdSet = strSqlUpdSetRet;
        }
        /// <summary>
        /// カラム名の追加
        /// </summary>
        /// <param name="strCol"></param>
        /// <param name="strSql"></param>
        private void SubAddCol(string strCol, ref string strSqlInsColRet)
        {
            if (IsDBNullOrNullOrEmpty(strSqlInsColRet))
            {
                strSqlInsColRet = strCol;
            }
            else
            {
                strSqlInsColRet = strSqlInsColRet + "," + strCol;
            }
        }
        /// <summary>
        /// 値の追加
        /// </summary>
        /// <param name="strVal"></param>
        /// <param name="strSql"></param>
        private void SubAddVal(string strVal, ref string strSqlInsValRet)
        {
            if (IsDBNullOrNullOrEmpty(strSqlInsValRet))
            {
                strSqlInsValRet = strVal;
            }
            else
            {
                strSqlInsValRet = strSqlInsValRet + "," + strVal;
            }
        }
        /// <summary>
        /// カラム、値の追加
        /// </summary>
        /// <param name="strCol"></param>
        /// <param name="strVal"></param>
        /// <param name="strSql"></param>
        private void SubUpdSet(string strCol, string strVal, ref string strSqlUpdSetRet)
        {
            if (IsDBNullOrNullOrEmpty(strSqlUpdSetRet))
            {
                strSqlUpdSetRet = strCol + MC_EQUAL + strVal;
            }
            else
            {
                strSqlUpdSetRet = strSqlUpdSetRet + "," + "\r\n" + strCol + MC_EQUAL + strVal;
            }
        }
        /// <summary>
        /// 'の追加
        /// </summary>
        /// <param name="strVal"></param>
        /// <returns></returns>
        private string SubAddPos(string strVal)
        {
            string strValRet = strVal;
            if (strVal != MC_NULL)
            {
                strValRet = "'" + strVal + "'";
            }
            return strValRet;
        }
        /// <summary>
        /// "''"に変更する
        /// </summary>
        /// <param name="strVal"></param>
        /// <returns></returns>
        private string ChangeString(string strVal)
        {
            return strVal.Replace("'", "''");
        }
        #endregion