lserp_cs_6.0/其他程序/AFKAbutment - 副本/SynchData.cs

/// <summary>
/// 同步操作数据类
/// </summary>
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static AFKAbutment.EnumClass;

namespace AFKAbutment
{
    public class SynchData
    {

        public string mysqlConnectionString;//mysql连接字段
        public string sqlServerConnectionString;//sqlsever连接字段
        /// <summary>
        /// <para>说明：创建Afk向朗速传递数据的同步方法</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期：2023-11-10 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary> 
        /// <param name="sqlServerTableName">Ls方需要构建的表</param>
        /// <param name="mysqlTableName">Afk方需要构建的表</param>
        /// <param name="specialFieldNames">特殊不同字段集合</param>
        public void CreateAndSyncTable(string sqlServerTableName, string mysqlTableName, List<string> specialFieldNames=null,DataTable LstoAfkData=null)
        {
            using (var sourceConnection = new MySqlConnection(mysqlConnectionString))
            {
                sourceConnection.Open();
                if (LstoAfkData == null)
                {
                    // 获取MySQL表结构
                    DataTable schemaTable = GetSchemaTable(mysqlTableName, sourceConnection);

                    // 创建SQL Server表并添加特殊字段
                    using (var destinationConnection = new SqlConnection(sqlServerConnectionString))
                    {
                        destinationConnection.Open();

                        if (!CheckIfTableExists(sqlServerTableName, destinationConnection))
                        {
                            CreateSqlServerTableWithSpecialFields(sqlServerTableName, schemaTable, specialFieldNames, destinationConnection);
                        }

                        // 同步数据
                        using (var bulkCopy = new SqlBulkCopy(destinationConnection))
                        {
                            bulkCopy.DestinationTableName = sqlServerTableName;
                            //sourceConnection.ChangeDatabase("mysqlDatabaseName"); // 替换为MySQL数据库名

                            using (var selectCmd = new MySqlCommand($"SELECT * FROM {mysqlTableName}", sourceConnection))
                            using (var reader = selectCmd.ExecuteReader())
                            {
                                bulkCopy.WriteToServer(reader);
                            }
                        }
                    }
                }
                else//若存在数据源则反向传数据源
                { 
                
                
                
                }
            }
        }
   
        /// <summary>
        /// <para>说明：获取mysql表中的列信息方便调用时候直接取用</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期：2023-11-10 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="tableName">mysql表名</param>
        /// <param name="connection">MySqlConnection的连接</param>
        /// <returns></returns>
        private DataTable GetSchemaTable(string tableName, MySqlConnection connection)
        {
            using (var schemaCommand = new MySqlCommand($"DESCRIBE {tableName}", connection))
            {
                using (var reader = schemaCommand.ExecuteReader())
                {
                    DataTable schemaTable = new DataTable();
                    schemaTable.Load(reader);
                    return schemaTable;
                }
            }
        }
        /// <summary>
        /// <para>说明：判断Ls数据库中是否存在需要同步的表名</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期：2023-11-10 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="tableName">表名</param>
        /// <param name="connection">SqlConnection的连接</param>
        /// <returns></returns>
        private bool CheckIfTableExists(string tableName, SqlConnection connection)
        {
            using (var command = new SqlCommand($"SELECT CASE WHEN EXISTS((SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = '{tableName}')) THEN 1 ELSE 0 END", connection))
            {
                return (int)command.ExecuteScalar() == 1;
            }
        }
        /// <summary>
        /// <para>说明：通过对应的数据结构进行同步</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期：2023-11-10 </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="tableName">Ls方需要构建的表名</param>
        /// <param name="schemaTable"></param>
        /// <param name="specialFieldNames"></param>
        /// <param name="connection"></param>
        private void CreateSqlServerTableWithSpecialFields(string tableName, DataTable schemaTable, List<string> specialFieldNames, SqlConnection connection)
        {
            using (var command = new SqlCommand("", connection))
            {
                // 创建表的SQL语句
                command.CommandText = $"CREATE TABLE {tableName} (";
                foreach (DataRow row in schemaTable.Rows)
                {
                    var columnName = row["Field"].ToString();
                    var columnType = row["Type"].ToString();

                    // 转换MySQL数据类型到SQL Server数据类型
                    if (columnType.StartsWith("varchar"))
                    {
                        // 如果字段在特殊字段列表中或类型为varchar，则设置为NVARCHAR(255)（或其他需要的长度）
                        command.CommandText += $"[{columnName}] NVARCHAR(255), ";
                    }
                    else if (columnType.StartsWith("int"))
                    {
                        command.CommandText += $"[{columnName}] INT, ";
                    }
                    else if (columnType.StartsWith("decimal"))
                    {
                        command.CommandText += $"[{columnName}] DECIMAL(18, 2), "; // 适当调整精度和小数位
                    }
                    // 其他类型转换...
                    else
                    {
                        // 默认转换为NVARCHAR(MAX)
                        command.CommandText += $"[{columnName}] NVARCHAR(MAX), ";
                    }
                }
                command.CommandText = command.CommandText.TrimEnd(',', ' ') + ")";
                command.ExecuteNonQuery();
            }
        }

    }
}