C#把DataTable中大量数据一次插入数据库的方法

1、先把Access数据库中要导入的数据存入DataTable中

配置文件中的数据库连接字符串

1 <connectionStrings>
2     <add name="oleConStr" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="/>
3     
4     <add name="sqlConStr" connectionString ="server=tiantiankaixing;database=新建数据库;trusted_connection=sspi"/>
5   </connectionStrings>

封装读取Access数据库数据到DataTable中的方法

 1   public static  string OleConStr = ConfigurationManager.ConnectionStrings["oleConStr"].ConnectionString ;
 2 
 3   public static DataTable OleGetDataTable(string sql, string filePath)
 4         {
 6             string a = OleConStr + filePath;
 7             using (OleDbConnection conn = new OleDbConnection(a))
 8             {
10                 using (OleDbDataAdapter da = new OleDbDataAdapter(sql, conn))
11                 {
12                     try
13                     {
14                         conn.Open();
15                         DataTable dt = new DataTable();
16                         da.Fill(dt);
17                         return dt;
18                     }
19                     catch (Exception ex)
20                     {
21                         throw ex;
22                     }
23                     finally
24                     {
25                         if (conn.State == ConnectionState.Open)
26                             conn.Close();
27                     }
28                 }
29             }
30         }

 读取目标Access数据库到Datatable

1 　　　　　　　string sql = "select Id,Time from checkinout";
2             DataTable dt = AcHelper.OleGetDataTable(sql, @"F:\project\tiantiankaixing\admin.mdb");

 

2、封装批量插入数据SQL Server数据的方法

 1  public  static void DataTableToSQLServer(DataTable dt,string connectString)
 2         {
 3             string connectionString = connectString;
 4 
 5             using (SqlConnection destinationConnection = new SqlConnection(connectionString))
 6             {
 7                 destinationConnection.Open();
 8 
 9                 using (SqlBulkCopy bulkCopy = new SqlBulkCopy(destinationConnection))
10                 {
13                     try
14                     {
16                         bulkCopy.DestinationTableName = "checkinout";//要插入的表的表名
17                         bulkCopy.BatchSize = dt.Rows.Count;
18                         bulkCopy.ColumnMappings.Add("ID", "ID");//映射字段名 DataTable列名 ,数据库 对应的列名  
19                         bulkCopy.ColumnMappings.Add("TIME", "TIME");
20                         
21                         bulkCopy.WriteToServer(dt);
22                         System.Windows.Forms.MessageBox.Show("插入成功");
23                     }
24                     catch (Exception ex)
25                     {
26                         Console.WriteLine(ex.Message);
27                     }
28                     finally
29                     {
30                         
32                     }
33                 }
36             }
38         } 

3、调用DataTableToSQlServer()方法

1 string localCon = "server=tiantiankaixing;database=Test;trusted_connection=sspi";
2 
3 Entity.DataTableToSQLServer(dt, localCon);

即可将DataTable中的全部数据插入数据库

 

附：SqlBulkCopy的简单使用方法

 1   public void Test()
 2         {
 3             string connectionString = "server=tiantiankaixing;database=新建数据库;trusted_connection=sspi";
 4             
 5             using (SqlConnection sourceConnection =
 6                        new SqlConnection(connectionString))
 7             {
 8                 sourceConnection.Open();
 9                 //获取读取的表总行数
10                 SqlCommand commandRowCount = new SqlCommand("select count(*) from student",sourceConnection);
11                 long countStart = System.Convert.ToInt32(commandRowCount.ExecuteScalar());
12                
13 
14                 //使用SqlDataReader读取源数据
15                 SqlCommand commandSourceData = new SqlCommand("select * from student", sourceConnection);
16                 SqlDataReader reader =commandSourceData.ExecuteReader();
17 
18                 //测试用，把数据从一个表批量插入到另一个表
19                 //现实生活中肯定不会
20                 using (SqlConnection destinationConnection =new SqlConnection(connectionString))
21                 {
22                     destinationConnection.Open();
23 
24                     //创建一个SQlBulkCopy对象
25                     //指定目标表名
26                     //指定要插入的行数
27                     //指定对应的映射
28                     using (SqlBulkCopy bulkCopy =new SqlBulkCopy(destinationConnection))
29                     {
30                         bulkCopy.DestinationTableName ="test";
31                         bulkCopy.BatchSize = 1;
32                         bulkCopy.ColumnMappings.Add("数据源列名","目标列名");
33 
34                         try
35                         {
36                             
37                             bulkCopy.WriteToServer(reader);
38                         }
39                         catch (Exception ex)
40                         {
41                             Console.WriteLine(ex.Message);
42                         }
43                         finally
44                         {
45                             reader.Close();
46                         }
47                     }
48                 }
53             }
54         }

 
   
   /// <summary>    
      
   /// DataTable批量添加(有事务)    
      
   /// </summary> /   
      
   // <param name="Table">数据源</param>   
      
    /// <param name="Mapping">定义数据源和目标源列的关系集合</param>    
      
   /// <param name="DestinationTableName">目标表</param>    
      
   public static bool MySqlBulkCopy(DataTable Table, SqlBulkCopyColumnMapping[] Mapping, string DestinationTableName) {    
      
   bool Bool = true;    
      
   using (SqlConnection con = new SqlConnection(ConnectionString)) {    
      
   con.Open();    
      
   using (SqlTransaction Tran = con.BeginTransaction()) {   
      
    using (SqlBulkCopy Copy = new SqlBulkCopy(con,SqlBulkCopyOptions.KeepIdentity,Tran)) {    
      
   Copy.DestinationTableName = DestinationTableName;//指定目标表    
      
   if (Mapping != null) { //如果有数据    
      
   foreach (SqlBulkCopyColumnMapping Map in Mapping) {    
      
   Copy.ColumnMappings.Add(Map); } }    
      
   try { Copy.WriteToServer(Table);//批量添加    
      
   Tran.Commit();//提交事务 }    
      
   catch { Tran.Rollback();   
      
   //回滚事务 Bool = false; } } } }   
      
    return Bool; }   
   
  MSSQL使用SqlBulkCopy,传数据源，表名，列影射，我导入150万几秒完成 
   
    
    /// <summary>   
      /// 使用SqlBulkCopy批量插入，只限SQLServer   
      /// 缺点，没有返回行数   
      /// </summary>   
      /// <param name="table">填充的DataTable,支持其它数据源，请看重载</param>   
      /// <param name="tableName">数据库对应表名</param>   
      /// <param name="columns">插入表对应的列名集合</param>   
      public void SqlBulkCopyInsert(DataTable table, string tableName, string[] columns)   
      {   
      SqlBulkCopy sbc = new SqlBulkCopy("接连字符串");   
      sbc.DestinationTableName = tableName;   
      foreach (string col in columns)   
      {   
      sbc.ColumnMappings.Add(col, col);   
      }   
      sbc.WriteToServer(table);   
      }   
    
   
  
其它数据库，将数据查到一个datatable,往table填充数据,再在adpt.Update(table) 
   
    
    /// <summary>   
      /// 多行插入,Connection/Command/DataAdapter看你连接的数据库类型   
      /// 进行相应的替换即可   
      /// </summary>   
      /// <param name="ds">填充数据后的数据集</param>   
      /// <returns>受影响行数</returns>   
      public int MultyInsert(DataSet ds)   
      {   
      int result = 0;   
      IDbConnection con = new OracleConnection("连接字符串");   
      con.Open();   
      IDbCommand cmd = new OracleCommand();   
      cmd.CommandText = "Insert into Member(UserName,Password) values(@name,@password)";   
      IDbDataParameter namePar = cmd.CreateParameter();   
      namePar.ParameterName = "@name";   
      namePar.SourceColumn = "UserName";   
      namePar.SourceVersion = DataRowVersion.Original;   
      namePar.DbType = DbType.String;   
      cmd.Parameters.Add(namePar);   
      IDbDataParameter passPar = cmd.CreateParameter();   
      passPar.ParameterName = "@pass";   
      passPar.DbType = DbType.String;   
      passPar.SourceColumn = "Password";   
      passPar.SourceVersion = DataRowVersion.Original;   
      cmd.Parameters.Add(passPar);   
      IDbDataAdapter adpt = new OracleDataAdapter();   
      adpt.InsertCommand = cmd;   
      try   
      {   
      result = adpt.Update(ds);   
      }   
      catch (Exception)   
      {   
       
      throw;   
      }   
      finally   
      {   
      con.Close();   
      }   
      return result;   
      }