webform1.aspx.cs

读取Oracle blog字段的例子,读取Blob数据项方式

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OracleClient;

namespace WebImage
{
	/// <summary>
	/// WebForm1 的摘要说明。
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			OracleConnection mConn;
			try
			{
				string sConn="data source=surprise;user id=jinqi;password=8626798;Max Pool Size=75;Min Pool Size=1";
				string mSql="select sphoto from student where DBMS_LOB.getlength(sphoto)>0 and STUDENTID=1";
				OracleDataReader m_Read = null;
				mConn=new OracleConnection(sConn);
				mConn.Open();
				OracleCommand mCmd=new OracleCommand();
				mCmd.Connection=mConn;
				mCmd.CommandText=mSql;
				m_Read=mCmd.ExecuteReader();
				m_Read.Read();
				byte[] mBlob=(byte[])m_Read["sphoto"];
				Response.ContentType = "image/jpg";
				Response.BinaryWrite(mBlob);
				Response.End();
			}
			catch(Exception ex)
			{
				throw ex;
			}
			finally
			{
				mConn.Close();
			}
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}