C#数据同步中基本步骤和用到的相关函数

C#数据同步中基本步骤和用到的相关函数

数据同步对比步骤:

1.将两数据库中对应的数据表分别生成XML文件

          /// <summary>
         /// 将一个DataTable以xml方式存入指定的文件中
         /// </summary>
         /// <param name="dt"></param>
         /// <param name="filePath"></param>
         public void SaveDataTableToXml(DataTable dt, string filePath)
         {
             //创建文件夹
             if (!Directory.Exists(Path.GetDirectoryName(filePath)))
             {
                 Directory.CreateDirectory(Path.GetDirectoryName(filePath));
             }

             DataSet ds = new DataSet();
             ds.Tables.Add(dt.Copy());
             ds.WriteXml(filePath);
         }

         /// <summary>
         /// 从一个指定的文件中读取DataTable
         /// </summary>
         /// <param name="filePath"></param>
         public DataTable ReadDataTableFromXml(string filePath)
         {
             DataSet ds = new DataSet();
             ds.ReadXml(filePath);
             if (ds.Tables.Count > )
             {
                 return ds.Tables[];
             }
             else
             {
                 return null;
             }
         }

2.上传要对比的XML数据文件到服务器端或者是从服务器下载XML文件到本地

C#Sockect异步传送或者WebClient方式传送

3.对比要同步的数据资料

          /// <summary>
         /// 对比文件
         /// </summary>
         /// <param name="localFile">本地文件</param>
         /// <param name="remoteFile">远程文件</param>
         /// <returns></returns>
         private bool FileCompare(string localFile, string remoteFile)
         {
             int localFilebyte;
             int remoteFilebyte;
             FileStream localFileStream;
             FileStream remoteFileStream;
             if (localFile == remoteFile)
             {
                 return true;
             }
             localFileStream = new FileStream(localFile, FileMode.Open);
             remoteFileStream = new FileStream(remoteFile, FileMode.Open);
             if (localFileStream.Length != remoteFileStream.Length)
             {
                 localFileStream.Close();
                 remoteFileStream.Close();
                 return false;
             }
             do
             {
                 localFilebyte = localFileStream.ReadByte();
                 remoteFilebyte = remoteFileStream.ReadByte();
             }
             while ((localFilebyte == remoteFilebyte) && (localFilebyte != -));
             localFileStream.Close();
             remoteFileStream.Close();
             return ((localFilebyte - remoteFilebyte) == );
         }
         /// <summary>
         /// 对比数据表
         /// </summary>
         /// <param name="localDataTable">本地数据表</param>
         /// <param name="remoteDataTable">远程数据表</param>
         /// <returns></returns>
         public bool DataTableCompare(DataTable localDataTable, DataTable remoteDataTable)
         {
             if (localDataTable == null || remoteDataTable == null)
             {
                 return false;
             }
             if (localDataTable.Rows.Count != remoteDataTable.Rows.Count)
             {
                 return false;
             }
             if (localDataTable.Columns.Count != remoteDataTable.Columns.Count)
             {
                 return false;
             }
             for (int i = ; i < localDataTable.Rows.Count; i++)
             {
                 for (int j = ; j < localDataTable.Columns.Count; j++)
                 {
                     if (localDataTable.Rows[i][j].ToString() != remoteDataTable.Rows[i][j].ToString())
                     {
                         return false;
                     }
                 }
             }
             return true;
         }