启用事务操作，解决批量插入或更新sqlite，mssql等数据库耗时问题 分类： .NET 2015-06-18 14:39 31人阅读 评论(0) 收藏

原文地址：http://blog.csdn.net/smartsmile2012/article/details/22167179

private void button1_Click(object sender, EventArgs e)
{
    //Sqlite使用事务批量操作 极大的提高速度
    DateTime starttime = DateTime.Now;
    using (SQLiteConnection con = new SQLiteConnection(connStr))
    {
        con.Open();
        DbTransaction trans = con.BeginTransaction();//开始事务
        SQLiteCommand cmd = new SQLiteCommand(con);
        try
        {
            cmd.CommandText = "INSERT INTO MyTable(username,useraddr,userage) VALUES(@a,@b,@c)";
            for (int n = 0; n < 100000; n++)
            {
                cmd.Parameters.Add(new SQLiteParameter("@a", DbType.String)); //MySql 使用MySqlDbType.String
                cmd.Parameters.Add(new SQLiteParameter("@b", DbType.String)); //MySql 引用MySql.Data.dll
                cmd.Parameters.Add(new SQLiteParameter("@c", DbType.String));
                cmd.Parameters["@a"].Value = "张三" + n;
                cmd.Parameters["@b"].Value = "深圳" + n;
                cmd.Parameters["@c"].Value = 10 + n;
                cmd.ExecuteNonQuery();
            }
            trans.Commit();//提交事务
            DateTime endtime = DateTime.Now;
            MessageBox.Show("插入成功，用时" + (endtime - starttime).TotalMilliseconds);

        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

//MySql 事务批量提交 极大提交速度
try
{
    using (MySqlConnection con = new MySqlConnection(MySqlStr))
    {
    con.Open();
    DbTransaction trans = con.BeginTransaction();//开始事务

    #region 防重复先删除
    //循环本地Sqlite数据库数据
    for (int i = 0; i < count; i++)
    {
        DataRow dr = ds.Tables[0].Rows[i];
        string sqlDelete = "delete from packect where proimei=@d";
        MySqlCommand cmd1 = new MySqlCommand(sqlDelete, con);
        cmd1.Parameters.Add(new MySqlParameter("@d", MySqlDbType.String));
        cmd1.Parameters["@d"].Value = dr["proimei"];
        cmd1.ExecuteNonQuery();
    }
    #endregion


    #region 新增数据
    //循环本地Sqlite数据库数据
    for (int i = 0; i < count; i++)
    {
        DataRow dr = ds.Tables[0].Rows[i];
        string sqlInsert = "insert into packect(proimei, prokg, proadddate) values(@a,@b,@c)";
        MySqlCommand cmd2 = new MySqlCommand(sqlInsert, con);
        cmd2.Parameters.Add(new MySqlParameter("@a", MySqlDbType.String));
        cmd2.Parameters.Add(new MySqlParameter("@b", MySqlDbType.Decimal));
        cmd2.Parameters.Add(new MySqlParameter("@c", MySqlDbType.DateTime));
        cmd2.Parameters["@a"].Value = dr["proimei"];
        cmd2.Parameters["@b"].Value = dr["prokg"];
        cmd2.Parameters["@c"].Value = dr["proadddate"];
        cmd2.ExecuteNonQuery();
    }
    #endregion

    trans.Commit();//提交事务
    DateTime endtime = DateTime.Now;
    MessageBox.Show("上传数据成功，用时" + (endtime - starttime).TotalMilliseconds + "毫秒！");
    //清空本地数据库
    SQLiteHelper.ExecuteNonQuery(connStr, "delete from table1", CommandType.Text);
    }
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}

/*
    DataTable dt = new DataTable();
    //定义需要插入的字段，字段名需跟数据库字段保持一致
    dt.Columns.Add("username");
    dt.Columns.Add("useraddr");
    dt.Columns.Add("userage");
    for (int i = 0; i < 10000; i++)
    {
        dt.Rows.Add("张三" + i, "深圳" + i, i);
    }
    DateTime starttime = DateTime.Now;
    SqlBulkCopyInsert(dt, "mytable");
    DateTime endtime = DateTime.Now;
    Response.Write("插入成功，用时" + (endtime - starttime).TotalSeconds + "秒");
 */
/// <summary>
/// 使用SqlBulkCopy批量插入，只限SQLServer,超大数据量快速导入
/// </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>
public void SqlBulkCopyInsert(DataTable table, string tableName)
{
    SqlBulkCopy sbc = new SqlBulkCopy(MSCL.Until.GetApp("SqlConnStr"));
    sbc.DestinationTableName = tableName;

    for (int i = 0; i < table.Columns.Count; i++)
    {
        sbc.ColumnMappings.Add(table.Columns[i].ColumnName, table.Columns[i].ColumnName);
    }
    sbc.WriteToServer(table);
}

/// <summary>
/// 使用SqlBulkCopy批量插入，只限SQLServer,超大数据量快速导入
/// 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);
}


/// <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;
}

/*
 * Oracle中非常强大快速的数据批量操作方法
*/
////引用
//using System.Data;
//using System.Data.OracleClient;
//using Oracle.DataAccess.Client; //Oracle自带数据访问组件 位置： $Oracle安装路径$/bin/Oracle.DataAccess.dll
//设置一个数据库的连接串
string connectStr = "User Id=scott;Password=tiger;Data Source=";
OracleConnection conn = new OracleConnection(connectStr);
OracleCommand command = new OracleCommand();
command.Connection = conn;
//到此为止，还都是我们熟悉的代码，下面就要开始喽
//这个参数需要指定每次批插入的记录数
int recc = 10000000;
command.ArrayBindCount = recc;
//在这个命令行中,用到了参数,参数我们很熟悉,但是这个参数在传值的时候
//用到的是数组,而不是单个的值,这就是它独特的地方
command.CommandText = "insert into dept values(:deptno, :deptname, :loc)";
conn.Open();
//下面定义几个数组,分别表示三个字段,数组的长度由参数直接给出
int[] deptNo = new int[recc];
string[] dname = new string[recc];
string[] loc = new string[recc];
// 为了传递参数,不可避免的要使用参数,下面会连续定义三个
// 从名称可以直接看出每个参数的含义,不在每个解释了
OracleParameter deptNoParam = new OracleParameter("deptno", OracleType.Int32);
deptNoParam.Direction =  ParameterDirection.Input;
deptNoParam.Value = deptNo;
command.Parameters.Add(deptNoParam);
OracleParameter deptNameParam = new OracleParameter("deptname", OracleType.VarChar);
deptNameParam.Direction = ParameterDirection.Input;
deptNameParam.Value = dname; command.Parameters.Add(deptNameParam);
OracleParameter deptLocParam = new OracleParameter("loc", OracleType.VarChar);
deptLocParam.Direction = ParameterDirection.Input;
deptLocParam.Value = loc;
command.Parameters.Add(deptLocParam);
//在下面的循环中,先把数组定义好,而不是像上面那样直接生成SQL
for (int i = 0; i < recc; i++)
{
    deptNo[i] = i;
    dname[i] = i.ToString();
    loc[i] = i.ToString();
}
//这个调用将把参数数组传进SQL,同时写入数据库
command.ExecuteNonQuery();