图片保存到数据及从数据库读出(winform,c# 和vb.net)

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C#
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Windows.Forms;


namespace regedit
{
 /// <summary>
 /// Picture 的摘要描述。
 /// </summary>
 public class Picture : System.Windows.Forms.Form
 {
  private System.Windows.Forms.OpenFileDialog openFileDlg;
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.Button btnBrowse;
  private System.Windows.Forms.TextBox txtfile;
  private System.Windows.Forms.Button btnInsert;
  private System.Windows.Forms.TextBox txtname;
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.PictureBox pictureBox1;
  
  /// <summary>
  /// 設計工具所需的變數。
  /// </summary>
  private System.ComponentModel.Container components = null;
  SqlConnection conn=new SqlConnection("Data Source=localhost; Integrated Security=SSPI;Initial Catalog=mis");
  public Picture()
  {
   //
   // Windows Form 設計工具支援的必要項
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 呼叫之後加入任何建構函式程式碼
   //
  }

  /// <summary>
  /// 清除任何使用中的資源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if(components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows Form 設計工具產生的程式碼
  /// <summary>
  /// 此為設計工具支援所必須的方法 - 請勿使用程式碼編輯器修改
  /// 這個方法的內容。
  /// </summary>
  private void InitializeComponent()
  {
   this.openFileDlg = new System.Windows.Forms.OpenFileDialog();
   this.label1 = new System.Windows.Forms.Label();
   this.txtfile = new System.Windows.Forms.TextBox();
   this.btnBrowse = new System.Windows.Forms.Button();
   this.btnInsert = new System.Windows.Forms.Button();
   this.txtname = new System.Windows.Forms.TextBox();
   this.button1 = new System.Windows.Forms.Button();
   this.pictureBox1 = new System.Windows.Forms.PictureBox();
   this.SuspendLayout();
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(16, 16);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(72, 23);
   this.label1.TabIndex = 0;
   this.label1.Text = "ImageName";
   //
   // txtfile
   //
   this.txtfile.Location = new System.Drawing.Point(88, 16);
   this.txtfile.Name = "txtfile";
   this.txtfile.Size = new System.Drawing.Size(384, 22);
   this.txtfile.TabIndex = 1;
   this.txtfile.Text = "";
   //
   // btnBrowse
   //
   this.btnBrowse.Location = new System.Drawing.Point(24, 48);
   this.btnBrowse.Name = "btnBrowse";
   this.btnBrowse.TabIndex = 2;
   this.btnBrowse.Text = "Browse";
   this.btnBrowse.Click += new System.EventHandler(this.btnBrowse_Click);
   //
   // btnInsert
   //
   this.btnInsert.Location = new System.Drawing.Point(112, 48);
   this.btnInsert.Name = "btnInsert";
   this.btnInsert.TabIndex = 3;
   this.btnInsert.Text = "Insert";
   this.btnInsert.Click += new System.EventHandler(this.btnInsert_Click);
   //
   // txtname
   //
   this.txtname.Location = new System.Drawing.Point(112, 88);
   this.txtname.Name = "txtname";
   this.txtname.TabIndex = 4;
   this.txtname.Text = "txtname";
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(24, 88);
   this.button1.Name = "button1";
   this.button1.TabIndex = 5;
   this.button1.Text = "button1";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // pictureBox1
   //
   this.pictureBox1.Location = new System.Drawing.Point(24, 128);
   this.pictureBox1.Name = "pictureBox1";
   this.pictureBox1.Size = new System.Drawing.Size(320, 160);
   this.pictureBox1.TabIndex = 6;
   this.pictureBox1.TabStop = false;
   //
   // Picture
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 15);
   this.ClientSize = new System.Drawing.Size(488, 317);
   this.Controls.Add(this.pictureBox1);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.txtname);
   this.Controls.Add(this.btnInsert);
   this.Controls.Add(this.btnBrowse);
   this.Controls.Add(this.txtfile);
   this.Controls.Add(this.label1);
   this.Name = "Picture";
   this.Text = "操作圖片";
   this.Load += new System.EventHandler(this.Picture_Load);
   this.ResumeLayout(false);

  }
  #endregion

  private void btnBrowse_Click(object sender, System.EventArgs e)
  {
   if (openFileDlg.ShowDialog()==DialogResult.OK )
   {
                txtfile.Text=openFileDlg.FileName;
                btnInsert.Enabled = true;
   }
  }

  private void btnInsert_Click(object sender, System.EventArgs e)
  {
   FileStream fs=File.OpenRead(txtfile.Text);
   byte[] content=new byte[fs.Length];
   fs.Read(content, 0,content.Length);
   fs.Close();
   conn.Open();
   string sql ="insert into Photos(name,Photo) values(@name, @Photos)";
            SqlCommand comm=new SqlCommand(sql,conn);
   comm.Parameters.Add("@Photos", SqlDbType.Image).Value=content;
   comm.Parameters.Add("@name", SqlDbType.NVarChar).Value=txtname.Text;
    if(comm.ExecuteNonQuery()==1)
    {
     MessageBox.Show("Successfully insert image into database!");
    }
    else
    {
     MessageBox.Show("Failed to insert image into database");
    }
   conn.Close();
  }

  private void Picture_Load(object sender, System.EventArgs e)
  {
  
  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   ShowImage(txtname.Text);
  }

  private void ShowImage(string s)
  {
   string str  = "SELECT photo FROM Photos WHERE name='" + s +"'";
   SqlCommand cmd = new SqlCommand(str, conn);
   conn.Open();
   byte[] b= (byte[])cmd.ExecuteScalar();
   if (b.Length > 0)
   {
    MemoryStream stream = new MemoryStream(b, true);
    stream.Write(b, 0, b.Length);
    DrawToScale(new Bitmap(stream));
    stream.Close();
   }
   conn.Close();
  }

  private void DrawToScale(Image bmp)
  {
   pictureBox1.Image = new Bitmap(bmp);
  }

 }
}


VB.NET
Imports System.IO
Imports System.Data
Imports System.Data.SqlClient


Public Class photofrm
    Inherits System.Windows.Forms.Form
    Dim cn As SqlClient.SqlConnection


#Region " Windows Form 設計工具產生的程式碼 "

    Public Sub New()
        MyBase.New()

        '此為 Windows Form 設計工具所需的呼叫。
        InitializeComponent()

        '在 InitializeComponent() 呼叫之後加入所有的初始設定

    End Sub

    'Form 覆寫 Dispose 以清除元件清單。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    '為 Windows Form 設計工具的必要項
    Private components As System.ComponentModel.IContainer

    '注意: 以下為 Windows Form 設計工具所需的程序
    '您可以使用 Windows Form 設計工具進行修改。
    '請勿使用程式碼編輯器來修改這些程序。
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Public WithEvents SqlCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Button4 As System.Windows.Forms.Button
    Friend WithEvents Button5 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.PictureBox1 = New System.Windows.Forms.PictureBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog
        Me.SqlCommand1 = New System.Data.SqlClient.SqlCommand
        Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection
        Me.Button3 = New System.Windows.Forms.Button
        Me.Button4 = New System.Windows.Forms.Button
        Me.Button5 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(38, 15)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(120, 21)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Name"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(38, 60)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(120, 21)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "Photo"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(202, 15)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(120, 21)
        Me.TextBox1.TabIndex = 2
        Me.TextBox1.Text = ""
        '
        'PictureBox1
        '
        Me.PictureBox1.Location = New System.Drawing.Point(202, 52)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(528, 187)
        Me.PictureBox1.TabIndex = 3
        Me.PictureBox1.TabStop = False
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(173, 284)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(90, 21)
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "Brose"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(298, 284)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(90, 21)
        Me.Button2.TabIndex = 5
        Me.Button2.Text = "Add"
        '
        'SqlCommand1
        '
        Me.SqlCommand1.CommandText = "dbo.[sp_InsertPhoto]"
        Me.SqlCommand1.CommandType = System.Data.CommandType.StoredProcedure
        Me.SqlCommand1.Connection = Me.SqlConnection1
        Me.SqlCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@RETURN_VALUE", System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.ReturnValue, False, CType(0, Byte), CType(0, Byte), "", System.Data.DataRowVersion.Current, Nothing))
        Me.SqlCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@name", System.Data.SqlDbType.VarChar, 50))
        Me.SqlCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@image", System.Data.SqlDbType.VarBinary, 2147483647))
        '
        'SqlConnection1
        '
        Me.SqlConnection1.ConnectionString = "workstation id=HELLEN;packet size=4096;user id=sa;data source=HELLEN;persist secu" & _
        "rity info=False;initial catalog=MIS"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(403, 284)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(90, 21)
        Me.Button3.TabIndex = 6
        Me.Button3.Text = "Show"
        '
        'Button4
        '
        Me.Button4.Location = New System.Drawing.Point(614, 284)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(90, 21)
        Me.Button4.TabIndex = 7
        Me.Button4.Text = "Close"
        '
        'Button5
        '
        Me.Button5.Location = New System.Drawing.Point(509, 284)
        Me.Button5.Name = "Button5"
        Me.Button5.Size = New System.Drawing.Size(90, 21)
        Me.Button5.TabIndex = 8
        Me.Button5.Text = "Delete"
        '
        'photofrm
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(796, 381)
        Me.Controls.Add(Me.Button5)
        Me.Controls.Add(Me.Button4)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.PictureBox1)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Name = "photofrm"
        Me.Text = "photofrm"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub photofrm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'dim s as Decimal
        'If s = True Then
        '    MsgBox(Convert.ToString(Convert.ToUInt16(s)))
        'End If

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        'Display Picture File
        OpenFileDialog1.InitialDirectory = "d:\pic"
        OpenFileDialog1.DefaultExt = "gif"
        OpenFileDialog1.Filter = "Bmp Files(*.bmp)|*.bmp|Gif Files(*.gif)|*.gif|Jpg Files(*.jpg)|*.jpg"
        OpenFileDialog1.ShowDialog()
        PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        ' To Insert Image
        Dim st As New FileStream(OpenFileDialog1.FileName, FileMode.Open, FileAccess.Read)
        Dim s As String = TextBox1.Text
        Dim mbr As BinaryReader = New BinaryReader(st)
        Dim buffer(st.Length) As Byte
        mbr.Read(buffer, 0, CInt(st.Length))
        st.Close()
        InsertImage(buffer, s)

    End Sub
    'Function For Inserting in the Procdeure in the Database
    Public Function InsertImage(ByRef buffer, ByVal str)
        cn = New SqlClient.SqlConnection(SqlConnection1.ConnectionString)
        cn.Open()
        Dim cmd As New SqlClient.SqlCommand("sp_InsertPhoto", cn)
        cmd.CommandType = CommandType.StoredProcedure
        cmd.Parameters.Add("@name", SqlDbType.VarChar).Value = TextBox1.Text
        cmd.Parameters.Add("@image", SqlDbType.Image).Value = buffer
        cmd.ExecuteNonQuery()
        MsgBox("Image inserted")
        cn.Close()
    End Function
    Private Sub ShowImage(ByVal s As String)
        cn = New SqlClient.SqlConnection(SqlConnection1.ConnectionString)
        cn.Open()
        Dim str As String = "SELECT photo FROM Photos WHERE name='" & s & "'"
        Dim cmd As New SqlClient.SqlCommand(str, cn)
        TextBox1.Text = s
        Dim b() As Byte
        b = cmd.ExecuteScalar()
        If (b.Length > 0) Then
            Dim stream As New MemoryStream(b, True)
            stream.Write(b, 0, b.Length)
            DrawToScale(New Bitmap(stream))
            stream.Close()
        End If
        cn.Close()
    End Sub
    Private Sub DrawToScale(ByVal bmp As Image)
        PictureBox1.Image = New Bitmap(bmp)
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        Dim i As String = InputBox("Please Input Name:")
        ShowImage(i)
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        Me.Dispose()

    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        cn = New SqlClient.SqlConnection(SqlConnection1.ConnectionString)
        cn.Open()
        Dim s As String = InputBox("Please Input Name:")
        Dim cmd As New SqlClient.SqlCommand("delete from photos where name='" & s & "'", cn)
        cmd.ExecuteNonQuery()
        MsgBox("Image deleted")
        cn.Close()
    End Sub

    Private Sub photofrm_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing

    End Sub
End Class

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