showpicture.aspx.cs

ASP C#代码实例 适合初学人士学习使用

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.SqlClient;

namespace Example_11_5
{
	/// <summary>
	/// Summary description for ShowPicture.
	/// </summary>
	public class ShowPicture : System.Web.UI.Page
	{
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(Request.Params["PictureID"] != null)
			{
				PictureDB picture = new PictureDB();
				SqlDataReader recp = picture.GetSinglePicture(Int32.Parse(Request.Params["PictureID"].ToString()));
			 
				byte[] PictureData = null;

				while(recp.Read())
				{
					PictureData = (byte[])recp["PictureData"];
					Response.ContentType = recp["PictureType"].ToString();
				}
				recp.Close();

				//显示图片数据
				this.EnableViewState = false;

				Response.AppendHeader("Content-Length",PictureData.Length.ToString());			

				Response.BinaryWrite(PictureData);
				Response.End();		
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);
		}
		#endregion
	}
}