sql:
////// 初始化一个DataTable类型的数据源 /// Author : AnDequan /// Date : 2011-3-14 /// /// Source private DataTable InitSource() { DataTable dtUserAdd = new DataTable(); dtUserAdd.Columns.Add(new DataColumn("ID", typeof(int))); dtUserAdd.Columns.Add(new DataColumn("UserName", typeof(string))); dtUserAdd.Columns.Add(new DataColumn("UserPwd", typeof(string))); DataRow drTemp = null; for (int i = 0; i < 100; i++) { drTemp = dtUserAdd.NewRow(); drTemp["ID"] = 0; drTemp["UserName"] = "测试" + (i + 1); drTemp["UserPwd"] = "密码" + (i + 1); dtUserAdd.Rows.Add(drTemp); } return dtUserAdd; } /// /// 一次性把DataTable中的数据插入数据库 /// Author : AnDequan /// Date : 2011-3-14 /// /// DataTable数据源 /// true - 成功，false - 失败 public bool AddDataTableToDB(DataTable source) { SqlTransaction tran = null;//声明一个事务对象 try { using (SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=Test;")) { conn.Open();//打开链接 using (tran = conn.BeginTransaction()) { using (SqlBulkCopy copy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, tran)) { copy.DestinationTableName = "AnDequan.dbo.[User]"; //指定服务器上目标表的名称 copy.WriteToServer(InitSource()); //执行把DataTable中的数据写入DB tran.Commit(); //提交事务 return true; //返回True 执行成功！ } } } } catch (Exception ex) { if (null != tran) tran.Rollback(); //LogHelper.Add(ex); return false;//返回False 执行失败！ } }
//执行事务处理
public void DoTran()
{ //建立连接并打开
SqlConnection myConn=GetConn();
myConn.Open();
SqlCommand myComm=new SqlCommand();
//SqlTransaction myTran=new SqlTransaction();
//注意，SqlTransaction类无公开的构造函数
SqlTransaction myTran;
//创建一个事务
myTran=myConn.BeginTransaction();
try
{
//从此开始，基于该连接的数据操作都被认为是事务的一部分
//下面绑定连接和事务对象
myComm.Connection=myConn;
myComm.Transaction=myTran; //定位到pubs数据库
myComm.CommandText="USE pubs";
myComm.ExecuteNonQuery();//更新数据
//将所有的计算机类图书
myComm.CommandText="UPDATE roysched SET royalty = royalty * 1.10 WHERE title_id LIKE 'Pc%'";
myComm.ExecuteNonQuery();
//提交事务
myTran.Commit();
}
catch(Exception err)
{
throw new ApplicationException("事务操作出错，系统信息："+err.Message);
}
finally
{
myConn.Close();
}
}
private SqlConnection GetConn()
{
string strSql="Data Source=localhost;Integrated Security=SSPI;user id=sa;password=";
SqlConnection myConn=new SqlConnection(strSql);
return myConn;
}
}
public class Test
{
public static void Main()
{
DbTranSql tranTest=new DbTranSql();
tranTest.DoTran();
Console.WriteLine("事务处理已经成功完成。");
Console.ReadLine();
}
}
总结：方法一和方法二很类同，唯一不同的是方法一采用的是“insert into tb (...) values(...),(...)...;”的方式执行插入操作，
方法二则是“insert into tb (...) values (...);insert into tb (...) values (...);...”的方式，要不是测试，我也不知道两者差别是如此之大！
#region 批量操作
///
///使用MySqlDataAdapter批量更新数据
///
/// 数据库连接字符串
/// 数据表
public static void BatchUpdate( DataTable table)
{
MySqlConnection connection = GetConnection;
MySqlCommand command = connection.CreateCommand();
command.CommandTimeout = CommandTimeOut;
command.CommandType = CommandType.Text;
MySqlDataAdapter adapter = new MySqlDataAdapter(command);
MySqlCommandBuilder commandBulider = new MySqlCommandBuilder(adapter);
commandBulider.ConflictOption = ConflictOption.OverwriteChanges;
MySqlTransaction transaction = null;
try
{
connection.Open();
transaction = connection.BeginTransaction();
//设置批量更新的每次处理条数
adapter.UpdateBatchSize = BatchSize;
//设置事物
adapter.SelectCommand.Transaction = transaction;
if (table.ExtendedProperties["SQL"] != null)
{
adapter.SelectCommand.CommandText = table.ExtendedProperties["SQL"].ToString();
}
adapter.Update(table);
transaction.Commit();/提交事务
}
catch (MySqlException ex)
{
if (transaction != null) transaction.Rollback();
throw ex;
}
finally
{
connection.Close();
connection.Dispose();
}
}
///
///大批量数据插入,返回成功插入行数
///
/// 数据库连接字符串
/// 数据表
/// 返回成功插入行数
public static int BulkInsert( DataTable table)
{
if (string.IsNullOrEmpty(table.TableName)) throw new Exception("请给DataTable的TableName属性附上表名称");
if (table.Rows.Count == 0) return 0;
int insertCount = 0;
string tmpPath = Path.GetTempFileName();
string csv = DataTableToCsv(table);
File.WriteAllText(tmpPath, csv);
using (MySqlConnection conn = GetConnection)
{
MySqlTransaction tran = null;
try
{
conn.Open();
tran = conn.BeginTransaction();
MySqlBulkLoader bulk = new MySqlBulkLoader(conn)
{
FieldTerminator = ",",
FieldQuotationCharacter = '"',
EscapeCharacter = '"',
LineTerminator = "\r\n",
FileName = tmpPath,
NumberOfLinesToSkip = 0,
TableName = table.TableName,
};
bulk.Columns.AddRange(table.Columns.Cast().Select(colum => colum.ColumnName).ToList());
insertCount = bulk.Load();
tran.Commit();
}
catch (MySqlException ex)
{
if (tran != null) tran.Rollback();
throw ex;
}
}
File.Delete(tmpPath);
return insertCount;
}
///
///将DataTable转换为标准的CSV
///
/// 数据表
/// 返回标准的CSV
private static string DataTableToCsv(DataTable table)
{
//以半角逗号（即,）作分隔符，列为空也要表达其存在。
//列内容如存在半角逗号（即,）则用半角引号（即""）将该字段值包含起来。
//列内容如存在半角引号（即"）则应替换成半角双引号（""）转义，并用半角引号（即""）将该字段值包含起来。
StringBuilder sb = new StringBuilder();
DataColumn colum;
foreach (DataRow row in table.Rows)
{
for (int i = 0; i < table.Columns.Count; i++)
{
colum = table.Columns[i];
if (i != 0) sb.Append(",");
if (colum.DataType == typeof(string) && row[colum].ToString().Contains(","))
{
sb.Append("\"" + row[colum].ToString().Replace("\"", "\"\"") + "\"");
}
else sb.Append(row[colum].ToString());
}
sb.AppendLine();
}
return sb.ToString();
}
#endregion 批量操作
导入自增型数据：
自增列重新生成：SqlBulkCopy bc = new SqlBulkCopy(conn)
自增列保留原值：SqlBulkCopy bc = new SqlBulkCopy(conn,SqlBulkCopyOptions.KeepIdentity)
using(SqlBulkCopy sbc = new SqlBulkCopy(conn,SqlBulkCopyOptions.KeepIdentity))
{
sbc.DestinationTableName = tableName;
foreach (string col in colList)
{
sbc.ColumnMappings.Add(col, col);
}
sbc.BulkCopyTimeout = 0;
sbc.WriteToServer(dt);
}
- ///
- /// 初始化一个DataTable类型的数据源
- ///
Author : AnDequan - ///
Date : 2011-3-14 - ///
- ///
Source - private DataTable InitSource()
- {
- DataTable dtUserAdd = new DataTable();
- dtUserAdd.Columns.Add(new DataColumn("ID", typeof(int)));
- dtUserAdd.Columns.Add(new DataColumn("UserName", typeof(string)));
- dtUserAdd.Columns.Add(new DataColumn("UserPwd", typeof(string)));
- DataRow drTemp = null;
- for (int i = 0; i < 100; i++)
- {
- drTemp = dtUserAdd.NewRow();
- drTemp["ID"] = 0;
- drTemp["UserName"] = "测试" + (i + 1);
- drTemp["UserPwd"] = "密码" + (i + 1);
- dtUserAdd.Rows.Add(drTemp);
- }
- return dtUserAdd;
- }
- ///
- /// 一次性把DataTable中的数据插入
- ///
Author : AnDequan - ///
Date : 2011-3-14 - ///
- ///
- ///
true - 成功，false - 失败 - public bool AddDataTableToDB(DataTable source)
- {
- SqlTransaction tran = null;//声明一个事务对象
- try
- {
- using (SqlConnection conn = new SqlConnection("server=.;uid=sa;pwd=sa;database=Test;"))
- {
- conn.Open();//打开链接
- using (tran = conn.BeginTransaction())
- {
- using (SqlBulkCopy copy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, tran))
- {
- copy.DestinationTableName = "AnDequan.dbo.[User]"; //指定服务器上目标表的名称
- copy.WriteToServer(InitSource()); //执行把DataTable中的数据写入DB
- tran.Commit(); //提交事务
- return true; //返回True 执行成功！
- }
- }
- }
- }
- catch (Exception ex)
- {
- if (null != tran)
- tran.Rollback();
- //LogHelper.Add(ex);
- return false;//返回False 执行失败！
- }
- }