在.NET下，运用DATASET对数据进行批量更新时，需要与 DataAdapter配合使用。DataAdapter数据适配器的作用是生成数据更新时所需的insert,delete,update等语句，这些语句一般在开发阶段，在IDE环境下生成，但是如果需要在程序中动态配置数据来源，那么DataAdapter的insert,delete,update语句就需要动态生成了。这就是SqlCommandBuilder 对像了（以SqlDataAdapter对像为例，如果是别的DataAdapter对像，则可改为DBCommandBuilder ）。例如有以下更新方法
/// <summary>
/// 根据传入的SQL语句，为DataAdapter动态生成Command语句，并将数据保存到数据库
/// </summary>
/// <param name="ds">需操作的DataSet</param>
/// <param name="connectstr">数据库连接字符串</param>
/// <param name="tablename">DataSet中的指定需更新的表</param>
/// <param name="sqlstr">数据来源SQL语句，需要有主键才能更新</param>
public void DataSetUpdate(DataSet ds,string connectstr,string tablename,string sqlstr)
{
try
{
SqlDataAdapter adapter = new SqlDataAdapter(sqlstr, connectstr);
//使用SqlCommandBuilder 对像填充SqlDataAdapter 的InsertCommand、DeleteCommand、UpdateCommand对像
SqlCommandBuilder cmdBuilder = new SqlCommandBuilder(adapter);
int val = adapter.Update(ds, tablename);
ds.AcceptChanges();
}
catch
{
throw;
}
}
以上完成对单个数据表的保存，如果需要将多个数据表保存到数据库，就需要运用事务，将以上方法重载一次
public void DataSetUpdate(DataSet ds, SqlConnection sqlconnect, string tablename, string sqlstr,SqlTransaction sqltrans)
{
try
{
SqlDataAdapter adapter = new SqlDataAdapter(sqlstr, sqlconnect);
SqlCommandBuilder cmdBuilder = new SqlCommandBuilder(adapter);
//创建SqlDataAdapter 对像的Command对像，并将连接对像及事务对像绑定到Command对像上
adapter.DeleteCommand = new SqlCommand("", sqlconnect, sqltrans);
adapter.InsertCommand = new SqlCommand("", sqlconnect, sqltrans);
adapter.UpdateCommand = new SqlCommand("", sqlconnect, sqltrans);
adapter.SelectCommand = new SqlCommand(sqlstr, sqlconnect, sqltrans);
//使用GetDeleteCommand将相对应的SQLCOMMAND对像传入
adapter.DeleteCommand = cmdBuilder.GetDeleteCommand();
adapter.InsertCommand = cmdBuilder.GetInsertCommand();
adapter.UpdateCommand = cmdBuilder.GetUpdateCommand();
//cmdBuilder.RefreshSchema();
int val = adapter.Update(ds, tablename);
ds.Tables[tablename].AcceptChanges();
}
catch
{
throw;
}
}
通过以上方法，将SqlDataAdapter 对像的更新绑定到了事务，那么在外层调用如下
System.Data.SqlClient.SqlConnection sqlcon = new System.Data.SqlClient.SqlConnection(connectionstring);
System.Data.SqlClient.SqlTransaction sqltran;
sqlcon.Open();
//将事务绑定到连接对像
sqltran = sqlcon.BeginTransaction();
try
{
db.DataSetUpdate(ds, sqlcon, "main", "select lx as id,mc,xgrq from ddjgfl ",sqltran);
db.DataSetUpdate(ds, sqlcon, "ciled", "select ddbh,ksbh,ksmc,lsbm,mzbz,zybz,yjbz,czksbz,ykbz from ksdj", sqltran);
sqltran.Commit();
}
catch(System.Data.SqlClient.SqlException sqlex)
{
sqltran.Rollback();
MessageBox.Show(sqlex.Message);
}
catch (Exception ex)
{
sqltran.Rollback();
MessageBox.Show(ex.Message);
}
finally
{
}