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HOME > ASP.NET > ASP.NET MySQL (MySql.Data.MySqlClient) > ASP.NET MySQL BLOB Binary Data and Parameterized Query

ASP.NET MySQL BLOB Binary Data and Parameterized Query

ASP.NET MySQL BLOB Binary Data and Parameterized Query เขียน ASP.NET เพื่อจัดการข้อมูลใน MySQL Database ผ่าน Binary Data ในรูปแบบของ BLOB โดยคำสั่ง Execute Add/Insert/Update และ Delete ใช้รูปแบบการส่งข้อมูล Parameter เพื่อไช้ในการ Query Data (Using Parameterized Queries)

Instance NameSpace

VB.NET

Imports System.Data 
Imports MySql.Data.MySqlClient

ASP.NET & MySql.Data.MySqlClient

https://www.thaicreate.com/asp.net/asp.net-mysql.data.mysqlclient.html

การสร้างตาราง

CREATE TABLE `files` (
  `FilesID` int(4) NOT NULL auto_increment,
  `Name` varchar(100) NOT NULL,
  `FilesName` blob NOT NULL,
  `FilesType` varchar(50) NOT NULL,
  PRIMARY KEY  (`FilesID`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

นำ SQL นี้ไป Query บน phpMyAdmin หรือ Tools อื่น ๆ เพื่อสร้างตาราง

เริ่มต้นด้วยการสร้าง Project ใหม่บน Visual Studio เลือก Application เป็น ASP.NET Web Site

ASP.NET MySQL BLOB Binary Data

ตั้งชื่อ Project เป็น ASPNetBLOB เลือกภาษาที่ต้องการ สามารถใช้ได้กับ .NET Framework ทุกเวอร์ชั่น

สร้างไฟล์และ Code ทั้งหมดตามในตัวอย่าง

Language Code : VB.NET || C#

Default.aspx

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ThaiCreate.Com Tutorials</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:Label ID="lblStatus" runat="server" 
            Text="Please input Name and Chooes File. "></asp:Label>
        <br />
        
        <asp:Panel ID="pnlForm" Visible="true" runat="server">
            <asp:Label ID="lblName" runat="server" Text="Name :" Width="50px"></asp:Label>
            <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
            <br />
            <asp:Label ID="lblPicture" runat="server" Text="Picture :" Width="50px"></asp:Label>
            <asp:FileUpload ID="fUpload" runat="server" />
            <br />
            <asp:Button ID="btnUpload" runat="server" Text="Upload" />
            <input id="btnReset" type="reset" value="Reset" /></div>
       </asp:Panel>
    
    </form>
</body>
</html>

Default.aspx.vb

Imports System.Data
Imports MySql.Data.MySqlClient

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub

    Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
        Me.pnlForm.Visible = False

        If Me.fUpload.HasFile = False Or Me.txtName.Text = "" Then
            Me.lblStatus.Text = "Please input Name and Chooes File."
        Else

            '*** Read Binary Data ***'
            Dim imbByte(fUpload.PostedFile.InputStream.Length) As Byte
            fUpload.PostedFile.InputStream.Read(imbByte, 0, imbByte.Length)

            '*** MimeType ***'
            Dim ExtType As String = System.IO.Path.GetExtension(fUpload.PostedFile.FileName).ToLower()
            Dim strMIME As String = Nothing
            Select Case ExtType
                Case ".gif"
                    strMIME = "image/gif"
                Case ".jpg", ".jpeg", ".jpe"
                    strMIME = "image/jpeg"
                Case ".png"
                    strMIME = "image/png"
                Case Else
                    Me.lblStatus.Text = "Invalid file type."
                    Exit Sub
            End Select

            '*** Insert to Database ***'
            Dim objConn As New MySqlConnection
            Dim strConnString, strSQL As String

            strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;"

            strSQL = "INSERT INTO files (Name,FilesName,FilesType) " & _
            " VALUES " & _
            " (?sName,?sFilesName,?sFilesType)"
            objConn.ConnectionString = strConnString
            objConn.Open()

            Dim objCmd As New MySqlCommand(strSQL, objConn)
            objCmd.Parameters.Add("?sName", MySqlDbType.VarChar).Value = Me.txtName.Text
            objCmd.Parameters.Add("?sFilesName", MySqlDbType.Binary).Value = imbByte
            objCmd.Parameters.Add("?sFilesType", MySqlDbType.VarChar).Value = strMIME
            objCmd.ExecuteNonQuery()

            objConn.Close()
            objConn = Nothing

            Me.lblStatus.Text = "File Upload Successfully. Click <a href='ListPicture.aspx'>here</a> to view."
        End If
    End Sub

End Class

Edit.aspx

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Edit.aspx.vb" Inherits="Edit" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ThaiCreate.Com Tutorials</title>
</head>
<body>
<form id="form1" runat="server">
    <div>
    
        <asp:Label ID="lblStatus" runat="server" 
            Text="Please input Name and Chooes File. "></asp:Label>
        <br />
        
        <asp:Panel ID="pnlForm" Visible="true" runat="server">
            <asp:Image ID="ImgPic" runat="server" />
            <br />
            <asp:Label ID="lblName" runat="server" Text="Name :" Width="50px"></asp:Label>
            <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
            <br />
            <asp:Label ID="lblPicture" runat="server" Text="Picture :" Width="50px"></asp:Label>
            <asp:FileUpload ID="fUpload" runat="server" />
            <br />
            <asp:Button ID="btnUpload" runat="server" Text="Upload" />
            <input id="btnReset" type="reset" value="Reset" />
            <asp:Button ID="btnDel" runat="server" Text="Delete" />            
       </asp:Panel>
    </div>
    </form>
</body>
</html>

Edit.aspx.vb

Imports System.Data
Imports MySql.Data.MySqlClient

Partial Class Edit
    Inherits System.Web.UI.Page

    Dim objConn As New MySqlConnection
    Dim objCmd As MySqlCommand
    Dim strConnString, strSQL As String

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        Me.btnDel.Attributes.Add("OnClick", "return confirm('Are you sure delete?');")

        strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;"
        objConn.ConnectionString = strConnString
        objConn.Open()

        If Not Page.IsPostBack() Then
            ViewData()
        End If
    End Sub

    Protected Sub ViewData()
        '*** DataTable ***'
        Dim dtAdapter As MySqlDataAdapter
        Dim dt As New DataTable
        strSQL = "SELECT * FROM files WHERE FilesID = ?sFilesID "
        dtAdapter = New MySqlDataAdapter(strSQL, objConn)
        objCmd = dtAdapter.SelectCommand
        objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString("FilesID")
        dtAdapter.Fill(dt)

        If dt.Rows.Count > 0 Then
            Me.ImgPic.ImageUrl = "ViewImg.aspx?FilesID=" & dt.Rows(0)("FilesID")
            Me.txtName.Text = dt.Rows(0)("Name")
        End If

        dt = Nothing
    End Sub

    Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
        Me.pnlForm.Visible = False

        If Me.txtName.Text = "" Then
            Me.lblStatus.Text = "Please input Name."
        Else

            '*** Update Name ***'
            strSQL = "UPDATE files SET Name = ?sName " & _
                   " WHERE FilesID = ?sFilesID "

            objCmd = New MySqlCommand(strSQL, objConn)
            objCmd.Parameters.Add("?sName", MySqlDbType.VarChar).Value = Me.txtName.Text
            objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString("FilesID")
            objCmd.ExecuteNonQuery()

            '*** Update Picture ***'
            If Me.fUpload.HasFile = True Then
                '*** Read Binary Data ***'
                Dim imbByte(fUpload.PostedFile.InputStream.Length) As Byte
                fUpload.PostedFile.InputStream.Read(imbByte, 0, imbByte.Length)

                '*** MimeType ***'
                Dim ExtType As String = System.IO.Path.GetExtension(fUpload.PostedFile.FileName).ToLower()
                Dim strMIME As String = Nothing
                Select Case ExtType
                    Case ".gif"
                        strMIME = "image/gif"
                    Case ".jpg", ".jpeg", ".jpe"
                        strMIME = "image/jpeg"
                    Case ".png"
                        strMIME = "image/png"
                    Case Else
                        Me.lblStatus.Text = "Invalid file type."
                        Exit Sub
                End Select

                strSQL = "UPDATE files SET FilesName = ?sFilesName , FilesType = ?sFilesType  " & _
                       " WHERE FilesID = ?sFilesID "

                objCmd = New MySqlCommand(strSQL, objConn)
                objCmd.Parameters.Add("?sFilesName", MySqlDbType.Binary).Value = imbByte
                objCmd.Parameters.Add("?sFilesType", MySqlDbType.VarChar).Value = strMIME
                objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString("FilesID")
                objCmd.ExecuteNonQuery()

            End If

            Me.lblStatus.Text = "File Upload Successfully. Click <a href='ListPicture.aspx'>here</a> to view."
        End If
    End Sub

    Protected Sub btnDel_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnDel.Click
        Me.pnlForm.Visible = False
        '*** Delete Rows ***'
        strSQL = "DELETE FROM files  " & _
               " WHERE FilesID = ?sFilesID "

        objCmd = New MySqlCommand(strSQL, objConn)
        objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString("FilesID")
        objCmd.ExecuteNonQuery()
        Me.lblStatus.Text = "Delete Successfully. Click <a href='ListPicture.aspx'>here</a> to view."
    End Sub

    Protected Sub Page_Unload(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Unload
        objConn.Close()
        objConn = Nothing
    End Sub

End Class

ListPicture.aspx

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="ListPicture.aspx.vb" Inherits="ListPicture" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ThaiCreate.Com Tutorials</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
 <asp:GridView id="myGridView" runat="server" AutoGenerateColumns="False">
	<Columns>
	<asp:TemplateField HeaderText="ID">
		<ItemTemplate>
			<asp:Label id="lblFilesID" runat="server"></asp:Label>
		</ItemTemplate>
	</asp:TemplateField>

	<asp:TemplateField HeaderText="Name">
		<ItemTemplate>
			<asp:Label id="lblName" runat="server"></asp:Label>
		</ItemTemplate>
	</asp:TemplateField>

	<asp:TemplateField HeaderText="Picture">
		<ItemTemplate>
			<asp:Image ID="ImgPic" runat="server" />
		</ItemTemplate>
	</asp:TemplateField>

	<asp:TemplateField HeaderText="Edit">
		<ItemTemplate>
            <asp:HyperLink ID="hplEdit" runat="server">Edit</asp:HyperLink>
        </ItemTemplate>
	</asp:TemplateField>

	</Columns>
</asp:GridView>
    
    </div>
    </form>
</body>
</html>

ListPicture.aspx.vb

Imports System.Data
Imports MySql.Data.MySqlClient

Partial Class ListPicture
    Inherits System.Web.UI.Page

    Dim objConn As MySqlConnection
    Dim objCmd As MySqlCommand

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim strConnString As String
        strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;"
        objConn = New MySqlConnection(strConnString)
        objConn.Open()

        BindData()
    End Sub

    Protected Sub BindData()
        Dim strSQL As String
        strSQL = "SELECT * FROM files ORDER BY FilesID ASC"

        Dim dtReader As MySqlDataReader
        objCmd = New MySqlCommand(strSQL, objConn)
        dtReader = objCmd.ExecuteReader()

        '*** BindData to GridView ***'
        myGridView.DataSource = dtReader
        myGridView.DataBind()

        dtReader.Close()
        dtReader = Nothing
    End Sub

    Protected Sub Page_Unload(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Unload
        objConn.Close()
        objConn = Nothing
    End Sub

    Protected Sub myGridView_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles myGridView.RowDataBound
        '*** FilesID ***'
        Dim lblFilesID As Label = DirectCast(e.Row.FindControl("lblFilesID"), Label)
        If Not IsNothing(lblFilesID) Then
            lblFilesID.Text = e.Row.DataItem("FilesID")
        End If

        '*** Name ***'
        Dim lblName As Label = DirectCast(e.Row.FindControl("lblName"), Label)
        If Not IsNothing(lblName) Then
            lblName.Text = e.Row.DataItem("Name")
        End If

        '*** Picture ***'
        Dim ImgPic As Image = DirectCast(e.Row.FindControl("ImgPic"), Image)
        If Not IsNothing(ImgPic) Then
            ImgPic.ImageUrl = "ViewImg.aspx?FilesID= " & e.Row.DataItem("FilesID")
        End If

        '*** Hyperlink ***'
        Dim hplEdit As HyperLink = DirectCast(e.Row.FindControl("hplEdit"), HyperLink)
        If Not IsNothing(hplEdit) Then
            hplEdit.Text = "Edit"
            hplEdit.NavigateUrl = "Edit.aspx?FilesID=" & e.Row.DataItem("FilesID")
        End If

    End Sub

End Class

ViewImg.aspx

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="ViewImg.aspx.vb" Inherits="ViewImg" %>

ViewImg.aspx.vb

Imports System.Data
Imports MySql.Data.MySqlClient

Partial Class ViewImg
    Inherits System.Web.UI.Page

    Dim objConn As New MySqlConnection
    Dim objCmd As MySqlCommand
    Dim strConnString, strSQL As String

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;"
        objConn.ConnectionString = strConnString
        objConn.Open()

        '*** DataTable ***'
        Dim dtAdapter As MySqlDataAdapter
        Dim dt As New DataTable
        strSQL = "SELECT * FROM files WHERE FilesID = ?sFilesID "
        dtAdapter = New MySqlDataAdapter(strSQL, objConn)
        objCmd = dtAdapter.SelectCommand
        objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString("FilesID")
        dtAdapter.Fill(dt)

        If dt.Rows.Count > 0 Then
            Response.ContentType = dt.Rows(0)("FilesType").ToString()
            Response.BinaryWrite(dt.Rows(0)("FilesName"))
        End If

        dt = Nothing
    End Sub

    Protected Sub Page_Unload(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Unload
        objConn.Close()
        objConn = Nothing
    End Sub

End Class

Screenshot

ASP.NET MySQL BLOB Binary Data

หน้าจอสำหรับอัพโหลด (Upload Binary) ข้อมูลลงใน BLOB

ASP.NET MySQL BLOB Binary Data

หน้าจอสำหรับแสดงข้อมูล (View BLOB)

ASP.NET MySQL BLOB Binary Data

หน้าจอสำหรับแก้ไขข้อมูล (Edit BLOB)

ASP.NET MySQL BLOB Binary Data

หน้าจอสำหรับการลบข้อมูล (Delete BLOB)

ASP.NET MySql.Data.MySqlClient - Parameter Query

https://www.thaicreate.com/asp.net/asp.net-mysql.data.mysqlclient-parameter-query.html

ASP.NET & MySql.Data.MySqlClient

https://www.thaicreate.com/asp.net/asp.net-mysql.data.mysqlclient.html

ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท

ลองใช้ค้นหาข้อมูล


	By :	ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
	Score Rating :
	Create/Update Date :	2011-06-02 14:22:46 / 2017-03-29 10:34:18
	Download :

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