求助

Question

form透明度用Opacity指定 ， 存取image有如下方法！
using System;
using System.IO;
using System.Drawing;
using System.Data.SqlClient;
using System.Windows.Forms;namespace myTest{
 class rwimg : Form
 {
  private PictureBox pictureBox1 ;
public static void Main(string[] args)
{
Application.Run(new rwimg());
}

public rwimg()
{
 try{
  // 指定透明度
  this.Opacity = 0.7;
 
  // 连接SQL-Server Northwind数据库
SqlConnection conn = new SqlConnection("user id=sa;password=ip3;initial catalog=Northwind;data source=gr0-ip3home;");
conn.Open();
SqlCommand com = new SqlCommand("Select Photo from Employees where EmployeeID = 4", conn);
byte[] img = (byte[]) com.ExecuteScalar();
MemoryStream ms = new MemoryStream();
ms.Write(img,78,img.Length-78);
Bitmap bm = new Bitmap(ms);
bm.Save("1.gif",System.Drawing.Imaging.ImageFormat.Gif);
conn.Close();

this.Width = bm.Width+10;
this.Height = bm.Height+30; this.pictureBox1 = new PictureBox();
this.pictureBox1.Location = new System.Drawing.Point(0, 0);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(this.Width, this.Height);
this.pictureBox1.TabIndex = 1;
this.pictureBox1.TabStop = false;
this.pictureBox1.Image = bm;

this.Controls.AddRange(new System.Windows.Forms.Control[] {this.pictureBox1});

MessageBox.Show("Succeeded");
 }catch(Exception ex){ MessageBox.Show(ex.Message ); }
}
 }
}