首先在web.config文件中添加
<appSettings>
<add key="Oracle" value="Data Source=****;user=*****;password=*****;"/>
</appSettings>
然后把一下的代码考到一个空的cs中文件中，就能用了。
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OracleClient;//必须添加
using System.IO;
using System.Text;
using System.Web.SessionState;
/// <summary>
/// ClsOracleDB 的摘要说明 使用中
/// </summary>
public class ClsOracleDB
{
//用OracleConnection连接Oracle
public System.Data.OracleClient.OracleConnection cnn;
public string Connstr
{
get
{
return System.Configuration.ConfigurationSettings.AppSettings["Oracle"];
}
}
/// <summary>
/// 打开数据库连接
/// </summary>
public void Open()
{
cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
cnn.Open();
}
/// <summary>
/// 打开数据库连接，返回cnn
/// </summary>
public OracleConnection OpenCnn()
{
cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
cnn.Open();
return(cnn);
}
/// <summary>
/// 关闭数据库连接
/// </summary>
public void Close()
{
cnn.Close();
}
/// <summary>
/// 返回DataSet
/// </summary>
/// <param name="CmdString"></param>
/// <param name="TableName"></param>
/// <returns></returns>
public DataSet GetDataSet(string CmdString,string TableName)
{
Open();
OracleDataAdapter myDa =new OracleDataAdapter();
myDa.SelectCommand = new OracleCommand(CmdString,cnn);
DataSet myDs =new DataSet();
myDa.Fill(myDs,TableName);
Close();
return myDs;
}
/// <summary>
/// 返回OleDbDataReader
/// </summary>
/// <param name="CmdString"></param>
/// <returns></returns>
public OracleDataReader GetDataReader(string CmdString)
{
Open();
OracleCommand myCmd =new OracleCommand(CmdString,cnn);
OracleDataReader myDr =myCmd.ExecuteReader();
return myDr;
}
/// <summary>
/// 返回影响数据库的行数 更新数据库数据
/// </summary>
/// <param name="CmdString"></param>
/// <returns></returns>
public int ExecuteSQL(string CmdString)
{
Open();
OracleCommand myCmd =new OracleCommand(CmdString,cnn);
int Cmd =myCmd.ExecuteNonQuery();
Close();
return Cmd;
}
/// <summary>
/// 邦定DroDownList
/// </summary>
/// <param name="DroDList"></param>控件名
/// <param name="sql"></param>连接字符串
/// <param name="TableName"></param>表名
/// <param name="DataTextFd"></param>提供文本内容的数据源字段
/// <param name="DataValueFd"></param>为列表项提供值的数据源字段
public void DroList(DropDownList DroDList, string sql, string TableName, string DataTextFd, string DataValueFd)
{
Open();
OracleDataAdapter myDa = new OracleDataAdapter(sql, cnn);
myDa.SelectCommand.CommandType = CommandType.Text;
DataSet myDs = new DataSet();
try
{
myDa.Fill(myDs, TableName);
DroDList.DataSource = myDs.Tables[TableName];
DroDList.DataTextField = DataTextFd;
DroDList.DataValueField = DataValueFd;
DroDList.DataBind();
}
catch (System.Exception e)
{
//Response.Write(e.Message);
LeeGunn.Web.UI.MessageBox.MessageBox.Show(e.Message);
}
finally
{
Close();
}
}
//可以用了
public void SavePic()
{
string WarnGradeName;
int i;
string TmpdirPath;
TmpdirPath = "\\" + "file" + "\\" + "warnicon";
// WarnGradeName = HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath);
string sqlstr;
DataSet myallds = new DataSet();
string tablename;
tablename = "WARNMETEDIS";
sqlstr = "SELECT ID,WARNNAME FROM WARNMETEDIS ORDER BY WARNNAME";
i = 1;
myallds = GetDataSet(sqlstr, tablename);
if (myallds.Tables[0].Rows.Count >= 1)
{
for (i = 0; i < myallds.Tables[0].Rows.Count; i ++ )
{
WarnGradeName = myallds.Tables[0].Rows[i][1].ToString();
string[] photos = System.IO.Directory.GetFiles(HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath) + TmpdirPath, WarnGradeName + ".jpg");
if (photos[0].Trim() != "")
{
StringBuilder sbSQL = new StringBuilder("UPDATE WARNMETEDIS SET WARNICON = :WARNICON11 WHERE WARNNAME='" + WarnGradeName + "'");
OracleConnection cn = new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
OracleCommand cmd = cn.CreateCommand();
cmd.CommandText = sbSQL.ToString();
FileStream fs;
fs =File.OpenRead(photos[0]);
int lentth;
byte[] pic = new byte[fs.Length];
lentth = Convert.ToInt32(fs.Length);
fs.Read(pic, 0, lentth);
fs.Close();
cmd.Parameters.Add(":WARNICON11", OracleType.Blob).Value = pic;
try
{
cn.Open();
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
//Response.Write(ex.Message);
LeeGunn.Web.UI.MessageBox.MessageBox.Show(ex.Message);
}
finally
{
cn.Close();
}
}
else
{
LeeGunn.Web.UI.MessageBox.MessageBox.Show("没有数据");
}
}
}
}
//public
#region 参考存取图片代码
#region 创建的数据表
// CREATE TABLE TEST_TABLE
//(
// ID VARCHAR2(36 BYTE),
// NAME VARCHAR2(50 BYTE),
// PHOTO BLOB
//)
#endregion
//保存图片到数据库
private void CankaoSavePic()
{
//StringBuilder sbSQL = new StringBuilder("insert into Test_Table(ID,Name,Photo) values(:ID,:Name,:Photo)");
//OracleConnection cn = new OracleConnection(strCn);
//OracleCommand cmd = cn.CreateCommand();
//cmd.CommandText = sbSQL.ToString();
//cmd.Parameters.Add(":ID", OracleType.VarChar, 36).Value = Guid.NewGuid().ToString();
//cmd.Parameters.Add(":Name", OracleType.VarChar, 50).Value = fileUp.FileName; ;
//int intLen = fileUp.PostedFile.ContentLength;
//byte[] pic = new byte[intLen];
//fileUp.PostedFile.InputStream.Read(pic, 0, intLen);
//cmd.Parameters.Add(":Photo", OracleType.Blob).Value = pic;
//try
//{
// cn.Open();
// cmd.ExecuteNonQuery();
//}
//catch (Exception ex)
//{
// Response.Write(ex.Message);
//}
//finally
//{
// cn.Close();
//}
}
//从数据库中读取图片
private void CankaoReadPic()
{
// OracleConnection cn = new OracleConnection(strCn);
// OracleCommand cmd = cn.CreateCommand();
// cmd.CommandText = "select photo from test_table";
// try
// {
// cn.Open();
// MemoryStream stream = new MemoryStream();
// IDataReader reader = cmd.ExecuteReader();
// if (reader.Read())
// {
// byte[] pic = (byte[])reader[0];
// //byte[] pic = (byte[])cmd.ExecuteScalar();
// stream.Write(pic, 0, pic.Length);
// //Bitmap bitMap = new Bitmap(stream);
// //Response.ContentType = "image/Jpeg";
// //bitMap.Save(Response.OutputStream, ImageFormat.Jpeg);
// //注释部分可以将图片显示在IE中，而不是下载图片，
// //下面的方法直接下载文件
// Response.ContentType = "application/octet-stream";
// Response.AddHeader("Content-Disposition", "attachment;FileName= demo.JPG");
// Response.BinaryWrite(pic);
// Response.End();
// }
// }
// catch (Exception ex)
//{
// Response.Write(ex.Message);
//}
//finally
//{
// cn.Close();
//}
}
#endregion
public ClsOracleDB()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
}