我在数据库中存储了一个图片的二进制信息，现在想显示在PictrueBox中

Question

我在数据库中存储了一个图片的二进制信息，现在想显示在PictrueBox
可是在显示的时候怎么图片总是显示的是一部分其他部分都不显示呢？？
有什么可以解决的办法吗？

Answer 1

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Answer 2

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.IO;namespace 数据库相片
{
 /// <summary>
 /// Form1 的摘要说明。
 /// </summary>
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.PictureBox pictureBox1;
  private System.Windows.Forms.PictureBox pictureBox2;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.OpenFileDialog openFileDialog1;
  private System.Windows.Forms.Button button3;
  private System.Data.SqlClient.SqlConnection sqlConnection1;
  private System.Windows.Forms.Button button4;
  private System.Windows.Forms.TextBox textBox1;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null) 
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }  #region Windows 窗体设计器生成的代码
  /// <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.pictureBox1 = new System.Windows.Forms.PictureBox();
   this.pictureBox2 = new System.Windows.Forms.PictureBox();
   this.button1 = new System.Windows.Forms.Button();
   this.button2 = new System.Windows.Forms.Button();
   this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
   this.button3 = new System.Windows.Forms.Button();
   this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
   this.button4 = new System.Windows.Forms.Button();
   this.textBox1 = new System.Windows.Forms.TextBox();
   this.SuspendLayout();
   // 
   // pictureBox1
   // 
   this.pictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.pictureBox1.Location = new System.Drawing.Point(16, 40);
   this.pictureBox1.Name = "pictureBox1";
   this.pictureBox1.Size = new System.Drawing.Size(104, 144);
   this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
   this.pictureBox1.TabIndex = 0;
   this.pictureBox1.TabStop = false;
   // 
   // pictureBox2
   // 
   this.pictureBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.pictureBox2.Location = new System.Drawing.Point(200, 40);
   this.pictureBox2.Name = "pictureBox2";
   this.pictureBox2.Size = new System.Drawing.Size(104, 144);
   this.pictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
   this.pictureBox2.TabIndex = 1;
   this.pictureBox2.TabStop = false;
   // 
   // button1
   // 
   this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button1.Location = new System.Drawing.Point(32, 8);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(48, 23);
   this.button1.TabIndex = 2;
   this.button1.Text = "保存相片";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   // 
   // button2
   // 
   this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button2.Location = new System.Drawing.Point(240, 8);
   this.button2.Name = "button2";
   this.button2.Size = new System.Drawing.Size(48, 23);
   this.button2.TabIndex = 3;
   this.button2.Text = "提取相片";
   this.button2.Click += new System.EventHandler(this.button2_Click);
   // 
   // button3
   // 
   this.button3.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
   this.button3.Location = new System.Drawing.Point(16, 8);
   this.button3.Name = "button3";
   this.button3.Size = new System.Drawing.Size(8, 23);
   this.button3.TabIndex = 4;
   this.button3.Text = "选择相片";
   this.button3.Visible = false;
   this.button3.Click += new System.EventHandler(this.button3_Click);
   // 
   // sqlConnection1
   // 
   this.sqlConnection1.ConnectionString = "workstation id=E8CF7AF1B27E44A;packet size=4096;user id=sa;initial catalog=BookMa" +
    "nager;persist security info=False";
   // 
   // button4
   // 
   this.button4.Location = new System.Drawing.Point(336, 8);
   this.button4.Name = "button4";
   this.button4.Size = new System.Drawing.Size(75, 168);
   this.button4.TabIndex = 5;
   this.button4.Text = "换页";
   this.button4.Click += new System.EventHandler(this.button4_Click);
   // 
   // textBox1
   // 
   this.textBox1.Location = new System.Drawing.Point(120, 8);
   this.textBox1.Name = "textBox1";
   this.textBox1.Size = new System.Drawing.Size(96, 21);
   this.textBox1.TabIndex = 6;
   this.textBox1.Text = "";
   // 
   // Form1
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(336, 190);
   this.Controls.Add(this.textBox1);
   this.Controls.Add(this.button4);
   this.Controls.Add(this.button3);
   this.Controls.Add(this.button2);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.pictureBox2);
   this.Controls.Add(this.pictureBox1);
   this.Name = "Form1";
   this.Text = "数据库相片问题";
   this.Load += new System.EventHandler(this.Form1_Load);
   this.ResumeLayout(false);  }
  #endregion  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main() 
  {
   Application.Run(new Form1());
  }  private void button3_Click(object sender, System.EventArgs e)
  {
   
  }  private void Form1_Load(object sender, System.EventArgs e)
  {
  
  }  private void button1_Click(object sender, System.EventArgs e)
  {
   if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
   {
    Image img=Image.FromFile(this.openFileDialog1.FileName);
    this.pictureBox1.Image=img;
    
    FileInfo obj=new FileInfo(this.openFileDialog1.FileName);
    byte[] Content =new byte[obj.Length];
    FileStream imgStream=obj.OpenRead();
    //把文件内容读入字节数组
    imgStream.Read(Content,0,Content.Length);
    imgStream.Close();
    obj=null;
    System.Data.SqlClient.SqlCommand cmd=new SqlCommand();
    System.Data.SqlClient.SqlParameter pName=new SqlParameter("@借书证号",Type.GetType("System.Data.SqlDbType.NVarChar"));
    pName.Value=this.textBox1.Text;
    System.Data.SqlClient.SqlParameter pImg=new SqlParameter("@相片",Type.GetType("System.Data.SqlDbType.Image"));
    pImg.Value=Content;
    cmd.CommandText="Insert into 读者相片表 values(@借书证号,@相片)";
    cmd.Parameters.Add(pName);
    cmd.Parameters.Add(pImg);
    cmd.Connection=this.sqlConnection1;
    this.sqlConnection1.Open();
    cmd.ExecuteNonQuery();
    this.sqlConnection1.Close();
   }
  }  private void button2_Click(object sender, System.EventArgs e)
  {
   byte[] buffByte = null;
   string sql="select 相片 from 读者相片表 where 借书证号='"+this.textBox1.Text+"'";
   SqlCommand cmd=new SqlCommand(sql,this.sqlConnection1); 
   cmd.CommandType=CommandType.Text;
   this.sqlConnection1.Open();
   SqlDataReader dr=cmd.ExecuteReader();
   dr.Read();
   buffByte = ((byte[])dr["相片"]);
   MemoryStream ms=new MemoryStream((byte[])dr["相片"]);
   System.Drawing.Image image=System.Drawing.Image.FromStream(ms,true);
   this.pictureBox2.Image = image;
   dr.Close();
   this.sqlConnection1.Close();
  }  private void button4_Click(object sender, System.EventArgs e)
  {
   Form frm=new Form2();
   frm.ShowDialog();
  }
 }
}
完整的程序哟～～～～～～～～～～～～