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向SQL Server数据库添加图片和文字


   下面的代码实现向SQL Server数据库添加图片和文字的功能。


 [name] varchar(50),
 [photo] image NULL

 @name AS VARCHAR(50),
 @image AS IMAGE
INSERT INTO Photos ([name],  [photo])
VALUES (@name, @image)

Imports System.IO
Public Class Form1
  Inherits System.<a href="http://dev.21tx.com/os/windows/" target="_blank">Windows</a>.Forms.Form
  Dim cn As SqlClient.SqlConnection

#Region " Windows Form Designer generated code "

  Public Sub New()

    'This call is required by the Windows Form Designer.

    'Add any initialization after the InitializeComponent() call

  End Sub

  'Form overrides dispose to clean up the component list.
  Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
    If disposing Then
      If Not (components Is Nothing) Then
      End If
    End If
  End Sub

  'Required by the Windows Form Designer
  Private components As System.ComponentModel.IContainer

  'NOTE: The following procedure is required by the Windows Form Designer
  'It can be modified using the Windows Form Designer.
  'Do not modify it using the code editor.
  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
  Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection
  Friend WithEvents SqlCommand1 As System.Data.SqlClient.SqlCommand
  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.SqlConnection1 = New System.Data.SqlClient.SqlConnection()
    Me.SqlCommand1 = New System.Data.SqlClient.SqlCommand()
    Me.Button3 = New System.Windows.Forms.Button()
    Me.Button4 = New System.Windows.Forms.Button()
    Me.Button5 = New System.Windows.Forms.Button()
    Me.Label1.Location = New System.Drawing.Point(15, 19)
    Me.Label1.Name = "Label1"
    Me.Label1.Size = New System.Drawing.Size(80, 24)
    Me.Label1.TabIndex = 0
    Me.Label1.Text = "姓名:"
    Me.Label2.Location = New System.Drawing.Point(11, 64)
    Me.Label2.Name = "Label2"
    Me.Label2.Size = New System.Drawing.Size(80, 20)
    Me.Label2.TabIndex = 1
    Me.Label2.Text = "图片"
    Me.TextBox1.Location = New System.Drawing.Point(75, 16)
    Me.TextBox1.Name = "TextBox1"
    Me.TextBox1.Size = New System.Drawing.Size(173, 20)
    Me.TextBox1.TabIndex = 2
    Me.TextBox1.Text = ""
    Me.PictureBox1.Location = New System.Drawing.Point(68, 48)
    Me.PictureBox1.Name = "PictureBox1"
    Me.PictureBox1.Size = New System.Drawing.Size(376, 222)
    Me.PictureBox1.TabIndex = 3
    Me.PictureBox1.TabStop = False
    Me.Button1.Location = New System.Drawing.Point(278, 13)
    Me.Button1.Name = "Button1"
    Me.Button1.Size = New System.Drawing.Size(96, 26)
    Me.Button1.TabIndex = 4
    Me.Button1.Text = "浏览图片…"
    Me.Button2.Location = New System.Drawing.Point(57, 277)
    Me.Button2.Name = "Button2"
    Me.Button2.Size = New System.Drawing.Size(100, 32)
    Me.Button2.TabIndex = 5
    Me.Button2.Text = "添加到数据库"
    Me.SqlConnection1.ConnectionString = "Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;"
    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(10, 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))
    Me.Button3.Location = New System.Drawing.Point(265, 277)
    Me.Button3.Name = "Button3"
    Me.Button3.Size = New System.Drawing.Size(79, 32)
    Me.Button3.TabIndex = 6
    Me.Button3.Text = "显示记录"
    Me.Button4.Location = New System.Drawing.Point(362, 277)
    Me.Button4.Name = "Button4"
    Me.Button4.Size = New System.Drawing.Size(72, 32)
    Me.Button4.TabIndex = 7
    Me.Button4.Text = "退出"
    Me.Button5.Location = New System.Drawing.Point(167, 277)
    Me.Button5.Name = "Button5"
    Me.Button5.Size = New System.Drawing.Size(85, 32)
    Me.Button5.TabIndex = 8
    Me.Button5.Text = "删除该记录"
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(491, 324)
    Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.PictureBox1, _
        Me.Button5, Me.Button4, Me.Button3, Me.Button2, Me.Button1, Me.TextBox1, Me.Label1, Me.Label2})
    Me.Name = "Form1"
    Me.Text = "Form1"

  End Sub

#End Region
  'Browse Button
  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"
    PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)
  End Sub

  'Add Button
  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, File<a href="http://dev.21tx.com/database/access/" target="_blank">Access</a>.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))
    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)
    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
    MsgBox("Image inserted")
  End Function

  'Function to Display Image
  Private Sub ShowImage(ByVal s As String)
    cn = New SqlClient.SqlConnection(SqlConnection1.ConnectionString)
    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))
    End If
  End Sub

  'Function to Create Instance For the Image From the Buffer
  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("请输入名字:")
  End Sub

  Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
    Handles Button4.Click
  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)
    Dim s As String = InputBox("请输入要删除的名字:")
    Dim cmd As New SqlClient.SqlCommand("delete from photos where name='" & s & "'", cn)
    MsgBox("Image deleted")
  End Sub
End Class


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