数据库图片的输进输进[新版]
数据库图片的输入输出
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
{
///
/// Picture 的摘要描述。
///
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;
///
/// 設計工具所需的變數。
///
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
//
}
///
/// 清除任何使用中的資源。
///
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
///
/// 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。
///
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
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 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
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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