本来只想简单记录一下OracleDataAdapter的批量增加和修改用法的，在园子里看到一篇比较详细的就在这分享了(Oracle Data Provider for .NET)，虽然用的是 Update(DataSet dataSet, string srcTable);，其实都差不多；dataSet为新数据集，srcTable为对应数据库表名
值得提一句的就是，对于新的DataTable数据，根据情况要使用AcceptChanges();方法，然后设置表中每行数据状态，如修改数据操作
foreach (DataRow dr in data.Rows)
{
if (dr.RowState == DataRowState.Unchanged)
dr.SetModified();
}
然后再用Update(DataTable dataTable)
使用前保证新DataTabele用AcceptChanges();方法保存了
1 public static bool MultiUpdateData(DataTable data, string Columns, string tableName)
2 {
3 using (OracleConnection connection = new OracleConnection(connStr))
4 {
5 string SQLString = string.Format("select {0} from {1} where rownum=0", Columns, tableName);
6 using (OracleCommand cmd = new OracleCommand(SQLString, connection))
7 {
8 try
9 {
10 connection.Open();
11 OracleDataAdapter myDataAdapter = new OracleDataAdapter();
12 myDataAdapter.SelectCommand = new OracleCommand(SQLString, connection);
13 OracleCommandBuilder custCB = new OracleCommandBuilder(myDataAdapter);
14 custCB.ConflictOption = ConflictOption.OverwriteChanges;
15 custCB.SetAllValues = true;
16 foreach (DataRow dr in data.Rows)
17 {
18 if (dr.RowState == DataRowState.Unchanged)
19 dr.SetModified();
20 }
21 myDataAdapter.Update(data);
22 data.AcceptChanges();
23 myDataAdapter.Dispose();
24 return true;
25 }
26 catch (System.Data.OracleClient.OracleException E)
27 {
28 connection.Close();
29 return false;
30 }
31 }
32 }
33 }
Oracle批量修改
一下是链接文章，抄在这是怕丢失吧(多虑了)
1. 通过DataAdapter访问数据库
DataAdapter有四个属性SelectCommand,DeleteCommand,InsertCommand,UpdateCommand
1.1 当做检索处理的时候， 执行SelectCommand的操作，返回数据集。
// C# 例子
using System;
using System.Data;
using System.Xml;
using Oracle.DataAccess.Client;
class testSample
{
static void Main()
{
//数据库连接打开
OracleConnection con = new OracleConnection();
con.ConnectionString = "User Id=scott;Password=tiger;Data Source=oracle;";
con.Open();
Console.WriteLine("Connected Successfully");
// Create the command
// sql文
OracleCommand cmd = new OracleCommand("", con);
//select statement
string strSelectSql = "SELECT STU_ID, STU_NAME, AGE, BIRTHDAY, SEX FROM TBL_STUDENT " +
" WHERE SEX = :I_SEX AND BIRTHDAY >= :I_BIRTHDAY AND AGE = :I_AGE ";
//command和检索sql文 关联
cmd.CommandText = strSelectSql;
//sql文中变量通过oracle参数传递
OracleParameter oraParameter;
oraParameter = new OracleParameter("I_SEX",OracleDbType.Varchar2, 2);
oraParameter.Value = "01";
cmd.Parameters.Add(oraParameter);//字符型
oraParameter = new OracleParameter("I_BIRTHDAY",OracleDbType.Date);//日期型
oraParameter.Value = "1986/01/01";
cmd.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_AGE",OracleDbType.Int32);
oraParameter.Value = 20;
cmd.Parameters.Add(oraParameter);
DataSet dtTmp = new DataSet();
using(OracleDataAdapter dataAdapter = new OracleDataAdapter())
{
dataAdapter.SelectCommand = cmd;//检索command设置
dataAdapter.Fill(dtTmp);//检索结果保存在dtTmp数据集中
}
//
Console.WriteLine("Number of rows : {0} ", dtTmp.Tables[0].Rows.Count);
// Close and Dispose OracleConnection object
con.Close();
con.Dispose();
}
1.2 如果sql文只是想count(*) 获得数据库中记录件数，可以直接使用OracleCommand.ExecuteScalar()来快速取得。
// C# 例子
Cmd = new OracleCommand( "SELECT COUNT(*) FROM TBL_STUDENT", Conn );
Object o = Cmd.ExecuteScalar();
int nRecordCount = Convert.ToInt32(o.ToString());
1.3 当做更新处理的时候，调用 OracleDataAdapter 的Update方法，对输入参数DataTable中每行进行循环，
根据当前行的状态调用相应的 INSERT、UPDATE 或 DELETE 语句。
RowState属性相关处理的OracleCommand
DataRowState.Added 该行已添加 :InsertCommand
DataRowState.Deleted 该行已删除 :DeleteCommand
DataRowState.Modified 该行已被修改 :UpdateCommand
// C# 例子
using System;
using System.Data;
using System.Xml;
using Oracle.DataAccess.Client;
class testSample
{
public void updateStuData(DataSet i_Data)
{
//数据库连接打开
int nRecCount = 0;
OracleConnection con = new OracleConnection();
con.ConnectionString = "User Id=scott;Password=tiger;Data Source=oracle;";
con.Open();
Console.WriteLine("Connected Successfully");
// Create the command
// sql文
OracleCommand cmdUpdate = new OracleCommand("", con);
// sql文
OracleCommand cmdDelete = new OracleCommand("", con);
// sql文
OracleCommand cmdInsert = new OracleCommand("", con);
//select statement
string strUpdateSql = "UPDATE TBL_STUDENT SET STU_NAME = :I_STU_NAME WHERE STU_ID = :I_STU_ID ";
string strDeleteSql = "DELETE FROM TBL_STUDENT WHERE STU_ID = :I_STU_ID";
string strInsertSql = "INSERT TBL_STUDENT VALUES (:I_STU_ID, :I_STU_NAME, :I_AGE,:I_BIRTHDAY, :I_SEX )";
//command和检索sql文 关联
cmdUpdate.CommandText = strUpdateSql ;
cmdDelete.CommandText = strDeleteSql ;
cmdInsert.CommandText = strInsertSql ;
//sql文中变量通过oracle参数传递
OracleParameter oraParameter;
//当设置参数的时候
//oracle参数值可通过SourceColumn属性与更新数据行的字段绑定
//取得数据值的版本可通过SourceVersion来设定。
//DataRowVersion.Current 取得数据行中修改后的数据值
//DataRowVersion.Original 取得数据行中原始的数据值
//Where条件里面的参数值往往设置为取DataRowVersion.Original版本
//更新或者插入的参数值往往设置为取DataRowVersion.Current版本
//--------------------------------------------------
//更新用的oracle command
oraParameter = new OracleParameter("I_STU_NAME", OracleDbType.Varchar2, 20);
oraParameter.SourceColumn = "STU_NAME";//更新字段值
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";//检索字段值
oraParameter.SourceVersion = DataRowVersion.Original;
cmdUpdate.Parameters.Add(oraParameter);
//--------------------------------------------------
//删除用的oracle command
oraParameter = new OracleParameter("I_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";//检索字段值
oraParameter.SourceVersion = DataRowVersion.Original;
cmdDelete.Parameters.Add(oraParameter);
//--------------------------------------------------
//追加用的oracle command
oraParameter = new OracleParameter("I_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_STU_NAME", OracleDbType.Varchar2, 20);
oraParameter.SourceColumn = "STU_NAME";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_AGE", OracleDbType.Int32);
oraParameter.SourceColumn = "AGE";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_BIRTHDAY", OracleDbType.Date);
oraParameter.SourceColumn = "BIRTHDAY";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("I_SEX", OracleDbType.Varchar2, 2);
oraParameter.SourceColumn = "SEX";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
using(OracleDataAdapter dataAdapter = new OracleDataAdapter())
{
dataAdapter.InsertCommand= cmdUpdate;//追加command设置
dataAdapter.DeleteCommand= cmdDelete;//删除command设置
dataAdapter.UpdateCommand= cmdInsert;//更新command设置
nRecCount = dataAdapter.Update(i_Data, "TBL_STUDENT");//数据更新
}
Console.WriteLine("Number of Update rows : {0} ", nRecCount);
// Close and Dispose OracleConnection object
con.Close();
con.Dispose();
}
//执uc2 行结果
//例如：
//参数i_Data的TBL_STUDENT表中数据为：
//----------------------------------------------------------------------------------------------
//--| STU_ID | STU_NAME | AGE | BIRTHDAY | SEX | RowState
//--| 00001 | aaaaaaaaaa | 18 | 1988/05/10 | 01 | DataRowState.Modified
//--| 00002 | bbbbbbbbbb | 19 | 1987/02/01 | 01 | DataRowState.Modified
//--| 00003 | cccccccccc | 17 | 1989/07/10 | 00 | DataRowState.Deleted
//--| 00004 | dddddddddd | 18 | 1988/08/10 | 01 | DataRowState.Modified
//--| 00005 | eeeeeeeeee | 19 | 1987/09/10 | 00 | DataRowState.Added
//--| 00006 | ffffffffff | 17 | 1989/01/10 | 01 | DataRowState.Added
//----------------------------------------------------------------------------------------------
在执行dataAdapter.Update(i_Data, "TBL_STUDENT")的数据更新后,update方法内部自动循环表中记录
STU_ID{00001，00002，00004}执行更新操作
STU_ID{00005，00006} 执行插入操作
STU_ID{00003} 执行删除操作
并且相应的sql文中的oracle变量与记录行的相应字段值填入。
1.4 但是在表的字段较多的情况下，sql文会比较冗长，对应的oracle paramter也很多，如果都是通过手动写代码来实装,
处理方法就显得非常麻烦，代码量也很大。如果我们是对全表做更新的话，就可以改用OracleCommandBuilder类来简单实现。
// C# 例子
using(OracleDataAdapter dataAdapter = new OracleDataAdapter())
{
//dataAdapter的SelectCommand中检索SQL文设定
dataAdapter.SelectCommand = new OracleCommand("SELECT * FROM TBL_STUDENT", cnn);
//根据SelectCommand中检索SQL文，OracleCommandBuilder 将自动生成dataAdapter相应的
//UPDATE, INSERT, DELETE 用SQL文，并且oracle paramter也相应填入。
OracleCommandBuilder commandBuilder = new OracleCommandBuilder(dataAdapter);
nRecCount = dataAdapter.Update(i_Data, "TBL_STUDENT");//数据更新
}
关于OracleCommandBuilder 自动生成的SQL文，我们可以通过上述例子来详细说明：
假如 TBL_STUDENT由STU_ID，STU_NAME，AGE，BIRTHDAY，SEX这几个字段。
那么 自动生成的Update用SQL文为：
--------------------------------------------------
UPDATE TBL_STUDENT SET
STU_ID = :CURRENT_STU_ID，
STU_NAME = :CURRENT_STU_NAME，
AGE = :CURRENT_AGE ，
BIRTHDAY = :CURRENT_BIRTHDAY,
SEX = :CURRENT_SEX
WHERE STU_ID = :ORIGINAL_STU_ID AND
STU_NAME = :ORIGINAL_STU_NAME AND
AGE = :ORIGINAL_AGE AND
BIRTHDAY = :ORIGINAL_BIRTHDAY AND
SEX = :ORIGINAL_SEX
//更新字段的参数值的版本为Current.
oraParameter = new OracleParameter("CURRENT_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("CURRENT_STU_NAME", OracleDbType.Varchar2, 20);
oraParameter.SourceColumn = "STU_NAME";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("CURRENT_AGE", OracleDbType.Int32);
oraParameter.SourceColumn = "AGE";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("CURRENT_BIRTHDAY", OracleDbType.Date);
oraParameter.SourceColumn = "BIRTHDAY";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("CURRENT_SEX", OracleDbType.Varchar2, 2);
oraParameter.SourceColumn = "SEX";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdUpdate.Parameters.Add(oraParameter);
//检索字段的参数值的版本为Origianl.
oraParameter = new OracleParameter("ORIGINAL_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";
oraParameter.SourceVersion = DataRowVersion.Origianl;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("ORIGINAL_STU_NAME", OracleDbType.Varchar2, 20);
oraParameter.SourceColumn = "STU_NAME";
oraParameter.SourceVersion = DataRowVersion.Origianl;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("ORIGINAL_AGE", OracleDbType.Int32);
oraParameter.SourceColumn = "AGE";
oraParameter.SourceVersion = DataRowVersion.Origianl;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("ORIGINAL_BIRTHDAY", OracleDbType.Date);
oraParameter.SourceColumn = "BIRTHDAY";
oraParameter.SourceVersion = DataRowVersion.Origianl;
cmdUpdate.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("ORIGINAL_SEX", OracleDbType.Varchar2, 2);
oraParameter.SourceColumn = "SEX";
oraParameter.SourceVersion = DataRowVersion.Origianl;
cmdUpdate.Parameters.Add(oraParameter);
--------------------------------------------------
依次类推，delete 和 insert的sql文也可以同样原理自动生成。
1.5 另外，使用OracleDataAdapter时，不要误以为只能对update的参数表做处理，
其实工作原理是循环参数表中的记录,并且设置相应的oracle paramter.执行相应的sql文。
所以，有时候可以通过设置sql文做不同的操作，下面例子是往表TBL_CLASS_STU中插入相应记录。
记录的STU_ID，STU_NAME 取自参数TBL_STUDENT的字段。
CLASS_ID为固定值‘001‘ ，CLASS_NAME通过检索TBL_CLASS 来取得。
// C# 例子
using(OracleDataAdapter dataAdapter = new OracleDataAdapter())
{
cmdInsert.CommandText =
" INSERT INTO TBL_CLASS_STU( " +
" CLASS_ID, "+
" CLASS_NAME, "+
" STU_ID, "+
" STU_NAME )"+
" SELECT "+
" ‘001‘ , "+
" CLASS_NAME, "+
" :I_STU_IDO,"+
" :I_STU_NAME "+
" FROM TBL_CLASS "+
" WHERE CLASS_ID = ‘001‘ ";
OracleParameter oraParameter;
oraParameter = new OracleParameter("CURRENT_STU_ID", OracleDbType.Varchar2, 5);
oraParameter.SourceColumn = "STU_ID";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
oraParameter = new OracleParameter("CURRENT_STU_NAME", OracleDbType.Varchar2, 20);
oraParameter.SourceColumn = "STU_NAME";
oraParameter.SourceVersion = DataRowVersion.Current;
cmdInsert.Parameters.Add(oraParameter);
dataAdapter.InsertCommand= cmdUpdate;//追加command设置
nRecCount = dataAdapter.Update(i_Data, "TBL_STUDENT");//数据更新
}
前面用OracleDataAdapter访问DB，需要DataSet参数做对应操作。
但是在实行固定sql文或者存储过程的时候，我们可以采用OracleCommand 的ExecuteNonQuery()方法。
2.1 执行sql文的时候，很简单，只要设置OracleCommand 的CommandText。执行即可。
C#例
cmd.CommandText = "update emp set sal = sal + .01 where empno=7934";
int rowsUpdated = cmd.ExecuteNonQuery();
2.2 这里主要想归纳一下通过OracleCommand调用存储过程的方法。
首先设置CommandText属性为存储过程的名称。注意带package名
其次将CommandType 属性设为System.Data.CommandType.StoredProcedure
然后填入相应的参数。参数可以为oracle的各种类型。
通过下面例子说明如何调用oracle的数组参数和cursor参数。
//PL/SQL
//--------------------------------------------------------
//Oracle服务器上 存储过程
//包含三个参数。
//I_ID 输入参数 VARCHAR2 类型
//I_TBL 输入参数 VARCHAR(10) 型的数组
//O_CUR 输出参数 cursor 类型
CREATE OR REPLACE PACKAGE JK_WAIN_0203.PKG_TEST IS
TYPE TYPE_TAB_111 IS TABLE OF VARCHAR(10) INDEX BY BINARY_INTEGER;
PROCEDURE PROC_GET_DATA(
I_ID IN VARCHAR2, //
I_TBL IN TYPE_TAB_111,
O_CUR OUT SYS_REFCURSOR);
END PKG_TEST;
/
CREATE OR REPLACE PACKAGE BODY JK_WAIN_0203.PKG_TEST IS
PROCEDURE PROC_GET_DATA(
I_ID IN VARCHAR2,
I_TBL IN TYPE_TAB_111,
O_CUR OUT SYS_REFCURSOR)
IS
V_INDEX NUMBER := 0;
V_INDEX_MAX NUMBER := 0;
V_DATA VARCHAR(10);
BEGIN
V_INDEX := I_TBL.FIRST;
V_INDEX_MAX := I_TBL.LAST;
WHILE V_INDEX <= V_INDEX_MAX LOOP
V_DATA := I_TBL(V_INDEX);
V_INDEX := V_INDEX + 1;
END LOOP;
OPEN O_CUR FOR SELECT * FROM TAB WHERE ROWNUM < 10;
END PROC_GET_DATA;
END PKG_TEST;
/
---------------------------------------------------------------------------
//C#例
public void Get_PrecedureData()
{
OracleConnection connection = null;//Connection
OracleCommand oraCommand = new OracleCommand();
OracleParameter paramId = null;
OracleParameter paramTbl = null;
OracleParameter paramCur = null;
OracleRefCursor pInfoCur = null;
DataSet dtRtn = new DataSet();
//数据库连接
connection = new OracleConnection("User Id=scott;Password=tiger;Data Source=oracle");
connection.Open();
oraCommand.Connection = connection;
oraCommand.Parameters.Clear();
// 存储过程 设定
oraCommand.CommandText = "PKG_TEST.PROC_GET_DATA";
oraCommand.CommandType = System.Data.CommandType.StoredProcedure;
// 输入输出参数设定
// Varchar2型
paramId = oraCommand.Parameters.Add( "I_ID", OracleDbType.Varchar2, ParameterDirection.Input );
// 数组类型参数设定
paramTbl = oraCommand.Parameters.Add( "I_TBL", OracleDbType.Varchar2, ParameterDirection.Input );
// 将CollectionType 设为 PLSQLAssociativeArray
paramTbl.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
//cursor 类型参数设定
paramCur = oraCommand.Parameters.Add("O_CUR", OracleDbType.RefCursor, ParameterDirection.Output );
//设置参数数组的大小
//注意：参数的Value 属性和ArrayBindSize 属性必须为元素个数相同的数组，且个数等于参数的Size 属性
int[] bindSize = new int[10];
string[] tblData = new string[10];
for(int ii = 0; ii < 10; ii++)
{
tblData[ii] = ii.ToString();//数值
bindSize[ii] = 10;//数值的大小
}
//数组参数设定
paramTbl.Value = tblData;
paramTbl.Size = 10;
paramTbl.ArrayBindSize = bindSize;
//存储过程执行
oraCommand.ExecuteNonQuery();
//out的cursor值的读取
using(OracleDataAdapter da = new OracleDataAdapter())
{
if(paramCur.Value != System.DBNull.Value)
{
pInfoCur = (OracleRefCursor)paramCur.Value;
da.Fill(dtRtn, pInfoCur);
}
//取得记录数
Console.WriteLine("the number of record count is {0}", dtRtn.Tables[0].Rows.Count);
}
oraCommand.Dispose();
connection.Close();
connection.Dispose();
}