在SQL Server中保存和输出图片

Stream imgdatastream = File1.PostedFile.InputStream;

int imgdatalen = File1.PostedFile.ContentLength;

string imgtype = File1.PostedFile.ContentType;

string imgtitle = TextBox1.Text;

byte[] imgdata = new byte[imgdatalen];

int n = imgdatastream.Read(imgdata,0,imgdatalen);

string connstr=

((NameValueCollection)Context.GetConfig

("appSettings"))["connstr"];

SqlConnection connection = new SqlConnection(connstr);

SqlCommand command = new SqlCommand

("INSERT INTO ImageStore(imgtitle,imgtype,imgdata)

VALUES ( @imgtitle, @imgtype,@imgdata )", connection );

SqlParameter paramTitle = new SqlParameter

("@imgtitle", SqlDbType.VarChar,50 );

paramTitle.Value = imgtitle;

command.Parameters.Add( paramTitle);

SqlParameter paramData = new SqlParameter

( "@imgdata", SqlDbType.Image );

paramData.Value = imgdata;

command.Parameters.Add( paramData );

SqlParameter paramType = new SqlParameter

( "@imgtype", SqlDbType.VarChar,50 );

paramType.Value = imgtype;

command.Parameters.Add( paramType );

connection.Open();

int numRowsAffected = command.ExecuteNonQuery();

connection.Close();

private void Page_Load(object sender, System.EventArgs e)

{

string imgid =Request.QueryString["imgid"];

string connstr=((NameValueCollection)

Context.GetConfig("appSettings"))["connstr"];

string sql="SELECT imgdata, imgtype FROM ImageStore WHERE id = "

+ imgid;

SqlConnection connection = new SqlConnection(connstr);

SqlCommand command = new SqlCommand(sql, connection);

connection.Open();

SqlDataReader dr = command.ExecuteReader();

if(dr.Read())

{

        Response.ContentType = dr["imgtype"].ToString();

        Response.BinaryWrite( (byte[]) dr["imgdata"] );

}

connection.Close();

}