关于c#连接oracle 请大家帮忙啊，谢谢啊！
using System;using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Data.OracleClient;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“dataSet1.TABSALORDER”中。您可以根据需要移动或移除它。
this.tABSALORDERTableAdapter.Fill(this.dataSet1.TABSALORDER);
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
string constring = "data source=hq100;user=hq2005;password=hq2005;";
OracleConnection conn = new OracleConnection(constring);
try
{
conn.Open();//打开指定的连接
OracleCommand com = conn.CreateCommand();
com.CommandText = "select * from tabsalorder";
OracleDataReader odr = com.ExecuteReader();
while (odr.Read())
{
this.lbl.Text = odr.GetOracleString(0).ToString();//
}
odr.Close();//
}
catch
{
MessageBox.Show("erro");//如果发生异常，则提示出错
}
finally
{
conn.Close();//关闭打开的连接
}
}
}
}
// while (odr.Read())
{
this.lbl.Text = odr.GetOracleString(0).ToString();//请问这句话什么意思啊？
}
odr.Close();//
//小弟学c#与oracle 连接，但是看不懂如何把数据传递DataGridView，显示出来。请各位大家帮忙，小弟该如何尽快的学习C# 连接oracle，或者是专有的c#连接oracle的资料，非常感激。
--------------------编程问答-------------------- 仅供参考
http://blog.sina.com.cn/s/blog_4dba646b0100b8he.html
http://www.cnblogs.com/whldqpi/archive/2009/10/14/1582995.html --------------------编程问答--------------------
<connectionStrings>
<add name="connStr" connectionString="Data Source=long;User ID=stud;Password=stud;"/>
</connectionStrings>>
DBHelper.cs文件
using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.Data;
using System.Data.OracleClient;
namespace OraHelper
{
public class DBHelper
{
public static OracleCommand cmd = null;
public static OracleConnection conn = null;
public static string connstr = ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
public DBHelper()
{}
#region 建立数据库连接对象
/// <summary>
/// 建立数据库连接
/// </summary>
/// <returns>返回一个数据库的连接OracleConnection对象</returns>
public static OracleConnection init()
{
try
{
conn = new OracleConnection(connstr);
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return conn;
}
#endregion
#region 设置OracleCommand对象
/// <summary>
/// 设置OracleCommand对象
/// </summary>
/// <param name="cmd">OracleCommand对象 </param>
/// <param name="cmdText">命令文本</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
private static void SetCommand(OracleCommand cmd,string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
cmd.Connection = conn;
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
cmd.Parameters.AddRange(cmdParms);
}
}
#endregion
#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion
#region 执行相应的sql语句，返回相应的DataSet对象
/// <summary>
/// 执行相应的sql语句，返回相应的DataSet对象
/// </summary>
/// <param name="sqlstr">sql语句</param>
/// <param name="tableName">表名</param>
/// <returns>返回相应的DataSet对象</returns>
public static DataSet GetDataSet(string sqlstr,string tableName)
{
DataSet set = new DataSet();
try
{
init();
OracleDataAdapter adp = new OracleDataAdapter(sqlstr, conn);
adp.Fill(set,tableName);
conn.Close();
}
catch (Exception e)
{
throw new Exception(e.Message.ToString());
}
return set;
}
#endregion
#region 执行不带参数sql语句，返回所影响的行数
/// <summary>
/// 执行不带参数sql语句，返回所影响的行数
/// </summary>
/// <param name="cmdstr">增，删，改sql语句</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText)
{
int count;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
count = cmd.ExecuteNonQuery();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion
#region 执行带参数sql语句或存储过程，返回所影响的行数
/// <summary>
/// 执行带参数sql语句或存储过程，返回所影响的行数
/// </summary>
/// <param name="cmdText">带参数的sql语句和存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回所影响的行数</returns>
public static int ExecuteNonQuery(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
int count;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
count = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return count;
}
#endregion
#region 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行不带参数sql语句，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion
#region 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// <summary>
/// 执行带参数的sql语句或存储过程，返回一个从数据源读取数据的OracleDataReader对象
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">参数集合</param>
/// <returns>返回一个从数据源读取数据的OracleDataReader对象</returns>
public static OracleDataReader ExecuteReader(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
OracleDataReader reader;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return reader;
}
#endregion
#region 执行不带参数sql语句,返回结果集首行首列的值object
/// <summary>
/// 执行不带参数sql语句,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdstr">相应的sql语句</param>
/// <returns>返回结果集首行首列的值object</returns>
public static object ExecuteScalar(string cmdText)
{
object obj;
try
{
init();
cmd = new OracleCommand(cmdText, conn);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion
#region 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// <summary>
/// 执行带参数sql语句或存储过程,返回结果集首行首列的值object
/// </summary>
/// <param name="cmdText">sql语句或存储过程名</param>
/// <param name="cmdType">命令类型</param>
/// <param name="cmdParms">返回结果集首行首列的值object</param>
/// <returns></returns>
public static object ExecuteScalar(string cmdText, CommandType cmdType, OracleParameter[] cmdParms)
{
object obj;
try
{
init();
cmd = new OracleCommand();
SetCommand(cmd, cmdText, cmdType, cmdParms);
obj = cmd.ExecuteScalar();
conn.Close();
}
catch (Exception ex)
{
throw new Exception(ex.Message.ToString());
}
return obj;
}
#endregion
}
}
居然连发3个帖子，，，，
还好回复的快，，不然被删了。。。
补充：.NET技术 , C#
