修改主表

  /// <summary>
        /// 将ListItems中存储的值生成SQLCommand对象，进行修改DataBaseTableName中ID为WhereID的记录操作
        /// </summary>
        public string UpdateToDataBaseTable(ListItemCollection ListItems, string DataBaseTableName, string WhereID)
        {
            bool tranflage = false;
            if (!IsHaveTran)
            {
                BeginTransaction();
                tranflage = true;
            }
            strupdateID = WhereID;
            string strsql = "select * from " + DataBaseTableName + " where id=‘" + WhereID + "‘; ";
            DataTable tab = new DataTable();
            strsql = this.GetAdapterTable(strsql, tab);
            if (strsql != string.Empty || tab == null)
                return "获取" + DataBaseTableName + "表结构时出现错误！";
            if (tab.Rows.Count == 0)
                return "当前需要修改的数据已经被其他用户删除，请刷新后重试！";
            SqlCommand mySqlCommand = new SqlCommand();
            mySqlCommand.Connection = this.SqlConnection;
            if (IsHaveTran) mySqlCommand.Transaction = sqltran;
            string sqlstrUpdata = "UPDATE " + DataBaseTableName + " SET ";
            for (int i = 0; i < ListItems.Count; i++)
            {
                DataColumn DC = tab.Columns[ListItems[i].Text.ToString().Trim()];
                if (DC == null) return "表" + DataBaseTableName + "不存在" + ListItems[i].Text.ToString().Trim() + "字段！";
                SqlParameter s = new SqlParameter(ListItems[i].Text.ToString().Trim(), DC.DataType);

                if (ListItems[i].Value.ToString().Equals(string.Empty) || ListItems[i].Value.ToString().Trim().ToLower() == "null") //**s.Value=ListItems[i].Value.ToString();**//修改之前2008-12-28
                    s.Value = ListItems[i].Value.ToString();
                else
                {
                    switch (DC.DataType.FullName)
                    {
                        case "System.Boolean":
                            if (ListItems[i].Value.ToString() != "0" && ListItems[i].Value.ToString().ToLower() != "false")
                                s.Value = Convert.ChangeType(1, DC.DataType);
                            else
                                s.Value = Convert.ChangeType(0, DC.DataType);
                            break;
                        case "System.Byte[]":
                            if (!System.IO.File.Exists(ListItems[i].Value.ToString()))
                                return "在存储文件时未找到缓存的文件！";
                            byte[] file = FileToArray(ListItems[i].Value.ToString());
                            if (file == null)
                                return "在存储文件时未能够正确的转换文件！";
                            s.Value = file;
                            break;
                        default:
                            s.Value = Convert.ChangeType(ListItems[i].Value.ToString(), DC.DataType);
                            break;
                    }
                }

                mySqlCommand.Parameters.Add(s);
                if (ListItems[i].Value.ToString().Trim().ToLower() != "null")
                    sqlstrUpdata = sqlstrUpdata + "[" + ListItems[i].Text.ToString().Trim() + "]=@" + ListItems[i].Text.ToString().Trim();
                else
                    sqlstrUpdata = sqlstrUpdata + "[" + ListItems[i].Text.ToString().Trim() + "]=null";

                if (i < ListItems.Count - 1)
                {
                    sqlstrUpdata = sqlstrUpdata + ",";
                }
            }
            sqlstrUpdata = sqlstrUpdata + " where id=‘" + WhereID + "‘; ";
            mySqlCommand.CommandText = sqlstrUpdata;
            try
            {
                string strmssage = WriteUpdateLog(tranflage, DataBaseTableName, sqlstrUpdata, mySqlCommand.Parameters);
                if (!string.IsNullOrEmpty(strmssage))
                {
                    return strmssage;
                }
                strreturnid = string.Empty;
                affectrows = mySqlCommand.ExecuteNonQuery();
                strreturnid = WhereID;
                // m_dbLog.RowID = strreturnid;
                if (tranflage)
                {
                    return CommitTransaction();
                }
                return string.Empty;
            }
            catch (Exception ex)
            {
                return ex.ToString();
            }

        }