ASP.NET保存图片到sql2008

//将图片转行为二进制的方式，存储到数据库
string name = FileUpload1.PostedFile.FileName;
string type = name.Substring(name.LastIndexOf(".") + 1); 
FileStream fs = File.OpenRead(name);
byte[] content = new byte[fs.Length];
fs.Read(content, 0, content.Length);
fs.Close();
 
//操作SQL数据库存储,请结合自己的软件
SqlConnection conn = new SqlConnection("Data Source=;Initial Catalog=;Persist Security Info=True;User ID=;Pooling=False;Password=");
SqlCommand cmd = conn.CreateCommand();
conn.Open();
cmd.CommandText = "insert into Images(Image_Content) values (@content)";
cmd.CommandType = CommandType.Text;
 
if (type == "jpg" || type == "gif" || type == "bmp" || type == "png")
{
   SqlParameter para = cmd.Parameters.Add("@content", SqlDbType.Image);
   para.Value = content;
   cmd.ExecuteNonQuery();
}
 
 
//读取数据库字段，并展示图片
string imgid = Request.QueryString["imgid"];
SqlConnection conn1 = new SqlConnection("Data Source=;Initial Catalog=;Persist Security Info=True;User ID=sa;Pooling=False;Password=");
SqlCommand cmd1 = new SqlCommand("select Image_Content from Images where Image_ID=3", conn1);     //固定显示Image_ID为3的图片
conn1.Open();
SqlDataReader sdr = cmd1.ExecuteReader();
if (sdr.Read())
{
    Response.BinaryWrite((byte[])sdr["Image_Content"]);
}
Response.End();

 

using System;  
using System.Web;  
using System.IO;  
using System.Data;  
using System.Data.SqlClient;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.HtmlControls;   
namespace UploadImage  
{   
public class UploadImage : Page {   
protected HtmlInputFile UP_FILE;          //HtmlControl、WebControls控件对象  
protected TextBox txtDescription;  
protected Label txtMessage;  
protected Int32 FileLength = 0;          //记录文件长度变量   
protected void Button_Submit(System.Object sender, System.EventArgs e) {  
HttpPostedFile UpFile = UP_FILE.PostedFile;  //HttpPostedFile对象，用于读取图象文件属性  
FileLength = UpFile.ContentLength;     //记录文件长度   
try {  
if (FileLength == 0) {   //文件长度为零时  
txtMessage.Text = "< b>请你选择你要上传的文件< /b>";   
} else {  
Byte[] FileByteArray = new Byte[FileLength];   //图象文件临时储存Byte数组  
Stream StreamObject = UpFile.InputStream;      //建立数据流对像。读取图象文件数据，FileByteArray为数据储存体，0为数据指针位置、FileLnegth为数据长度  
StreamObject.Read(FileByteArray,0,FileLength);     
//建立SQL Server链接  
SqlConnection Con = new SqlConnection("Data Source=Localhost;Initial Catalog=testdb;User ID=sa;Pwd=;");  
String SqlCmd = "INSERT INTO ImageStore (ImageData, ImageContentType, ImageDescription, ImageSize) VALUES (@Image, @ContentType, @ImageDescription, @ImageSize)";  
SqlCommand CmdObj = new SqlCommand(SqlCmd, Con);  
CmdObj.Parameters.Add("@Image",SqlDbType.Binary, FileLength).Value = FileByteArray;  
CmdObj.Parameters.Add("@ContentType", SqlDbType.VarChar,50).Value = UpFile.ContentType;  //记录文件类型  
//把其它单表数据记录上传  
CmdObj.Parameters.Add("@ImageDescription", SqlDbType.VarChar,200).Value = txtDescription.Text;  
//记录文件长度，读取时使用  
CmdObj.Parameters.Add("@ImageSize", SqlDbType.BigInt,8).Value = UpFile.ContentLength;  
Con.Open();  
CmdObj.ExecuteNonQuery();   
Con.Close();  
txtMessage.Text = "< p>< b>OK!你已经成功上传你的图片< /b>";//提示上传成功  
}  
} catch (Exception ex) {  
txtMessage.Text = ex.Message.ToString();  
}}}} 

ReadImage.cs程序内容如下：

using System;  
using System.Data;  
using System.Data.SqlClient;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.HtmlControls;  
namespace ReadImage {  
public class MainDisplay : System.Web.UI.Page {  
public void Page_Load(System.Object sender, System.EventArgs e) {  
    int ImgID = Convert.ToInt32(Request.QueryString["ImgID"]);  //ImgID为图片ID   
    //建立数据库链接  
    SqlConnection Con = new SqlConnection("Data Source=KING;Initial Catalog=testdb;User ID=sa;Pwd=;");  
    String SqlCmd = "SELECT * FROM ImageStore WHERE ImageID = @ImageID";  
    SqlCommand CmdObj = new SqlCommand(SqlCmd, Con);  
    CmdObj.Parameters.Add("@ImageID", SqlDbType.Int).Value = ImgID;  
    Con.Open();  
    SqlDataReader SqlReader = CmdObj.ExecuteReader();  
    SqlReader.Read();       
    Response.ContentType = (string)SqlReader["ImageContentType"];//设定输出文件类型  
    //输出图象文件二进制数制  
    Response.OutputStream.Write((byte[])SqlReader["ImageData"], 0, (int)SqlReader["ImageSize"]);       
    Response.End();  
    Con.Close();  
    //很简单吧^_^  
 }  
}  
} 

ShowImage.hml

< html> 
< body> 
这个是从数据库读取出来的图象：< img src="ReadImage.aspx?ImgID=1"> 
< body> 
< /html>