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向SQL Server数据库添加图片和文字

作者:孟宪会    文章来源:网络    更新时间:2007-6-4 23:54:35

下面的代码实现向SQL Server数据库添加图片和文字的功能。

首先,在SQL查询分析器中执行下面的SQL语句,以创建表和存储过程。

CREATE TABLE Photos ( [name] varchar(50), [photo] image NULL ) GO CREATE PROCEDURE sp_InsertPhoto @name AS VARCHAR(50), @image AS IMAGE AS INSERT INTO Photos ([name], [photo]) VALUES (@name, @image) GO

下面就是完整的代码,拷贝即可运行:

Imports System.IO Public Class Form1 Inherits System.Windows.Forms.Form Dim cn As SqlClient.SqlConnection #Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() '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 components.Dispose() End If End If MyBase.Dispose(disposing) 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.SuspendLayout() ' 'Label1 ' 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:" ' 'Label2 ' 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" ' 'TextBox1 ' 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 = "" ' 'PictureBox1 ' 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 ' 'Button1 ' 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…" ' 'Button2 ' 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" ' 'SqlConnection1 ' Me.SqlConnection1.ConnectionString = "Data Source=.;Initial Catalog=mxh;User Id=sa;Password=;" ' '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(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)) ' 'Button3 ' 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" ' 'Button4 ' 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" ' 'Button5 ' 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" ' 'Form1 ' 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" Me.ResumeLayout(False) 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" OpenFileDialog1.ShowDialog() 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, 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 'Function to Display Image 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 'Function to Create Instance For the Image From the Buffer Private Sub DrawToScale(ByVal bmp As Image) PictureBox1.Image = New Bitmap(bmp) End Sub '显示处理 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:") ShowImage(i) End Sub '退出处理 Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles Button4.Click Me.Dispose() End Sub '删除处理 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("请输入要删除的名字:") Dim cmd As New SqlClient.SqlCommand("delete from photos where name='" & s & "'", cn) cmd.ExecuteNonQuery() MsgBox("Image deleted") cn.Close() End Sub End Class


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