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

(C#) ASP.NET MySQL BLOB Binary Data and Parameterized Query

(C#) 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

C#

Using System.Data; 
Using 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="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ASPNetBLOB._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" 
                onclick="btnUpload_Click" />
            <input id="btnReset" type="reset" value="Reset" /></div>
       </asp:Panel>
    
    </form>
</body>
</html>

Default.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using MySql.Data.MySqlClient;

namespace ASPNetBLOB
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void btnUpload_Click(object sender, EventArgs e)
        {
            this.pnlForm.Visible = false;

            if (this.fUpload.HasFile == false | string.IsNullOrEmpty(this.txtName.Text))
            {
                this.lblStatus.Text = "Please input Name and Chooes File.";

            }
            else
            {
                //*** Read Binary Data ***'
                byte[] imbByte = new byte[fUpload.PostedFile.InputStream.Length + 1];
                fUpload.PostedFile.InputStream.Read(imbByte, 0, imbByte.Length);

                //*** MimeType ***'
                string ExtType = System.IO.Path.GetExtension(fUpload.PostedFile.FileName).ToLower();
                string strMIME = null;
                switch (ExtType)
                {
                    case ".gif":
                        strMIME = "image/gif";
                        break;
                    case ".jpg":
                    case ".jpeg":
                    case ".jpe":
                        strMIME = "image/jpeg";
                        break;
                    case ".png":
                        strMIME = "image/png";
                        break;
                    default:
                        this.lblStatus.Text = "Invalid file type.";
                        return;
                }

                //*** Insert to Database ***'
                MySqlConnection objConn = new MySqlConnection();
                string strConnString = null;
                string strSQL = null;

                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();

                MySqlCommand objCmd = new MySqlCommand(strSQL, objConn);
				objCmd.Parameters.Add("?sName", MySqlDbType.VarChar).Value = this.txtName.Text;
				objCmd.Parameters.Add("?sFilesName", MySqlDbType.Binary).Value = imbByte;
				objCmd.Parameters.Add("?sFilesType", MySqlDbType.VarChar).Value = strMIME;
                objCmd.ExecuteNonQuery();

                objConn.Close();
                objConn = null;

                this.lblStatus.Text = "File Upload Successfully. Click <a href='ListPicture.aspx'>here</a> to view.";
            }
        }

    }
}

Edit.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Edit.aspx.cs" Inherits="ASPNetBLOB.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" 
                onclick="btnUpload_Click" />
            <input id="btnReset" type="reset" value="Reset" />
            <asp:Button ID="btnDel" runat="server" Text="Delete" onclick="btnDel_Click" 
                style="height: 26px" />            
       </asp:Panel>
    </div>
    </form>
</body>
</html>

Edit.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using MySql.Data.MySqlClient;

namespace ASPNetBLOB
{
    public partial class Edit : System.Web.UI.Page
    {
        MySqlConnection objConn = new MySqlConnection();
        MySqlCommand objCmd;
        string strConnString;

        string strSQL;
        protected void Page_Load(object sender, EventArgs e)
        {
            this.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 (!Page.IsPostBack)
            {
                ViewData();
            }
        }

        protected void ViewData()
        {
            //*** DataTable ***'
            MySqlDataAdapter dtAdapter = default(MySqlDataAdapter);
            DataTable dt = 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)
            {
                this.ImgPic.ImageUrl = "ViewImg.aspx?FilesID=" + dt.Rows[0]["FilesID"];
                this.txtName.Text = dt.Rows[0]["Name"].ToString();
            }

            dt = null;
        }

        protected void btnUpload_Click(object sender, EventArgs e)
        {
            this.pnlForm.Visible = false;

            if (string.IsNullOrEmpty(this.txtName.Text))
            {
                this.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 = this.txtName.Text;
                objCmd.Parameters.Add("?sFilesID", MySqlDbType.Int32).Value = Request.QueryString["FilesID"];
                objCmd.ExecuteNonQuery();

                //*** Update Picture ***'
                if (this.fUpload.HasFile == true)
                {
                    //*** Read Binary Data ***'
                    byte[] imbByte = new byte[fUpload.PostedFile.InputStream.Length + 1];
                    fUpload.PostedFile.InputStream.Read(imbByte, 0, imbByte.Length);

                    //*** MimeType ***'
                    string ExtType = System.IO.Path.GetExtension(fUpload.PostedFile.FileName).ToLower();
                    string strMIME = null;
                    switch (ExtType)
                    {
                        case ".gif":
                            strMIME = "image/gif";
                            break;
                        case ".jpg":
                        case ".jpeg":
                        case ".jpe":
                            strMIME = "image/jpeg";
                            break;
                        case ".png":
                            strMIME = "image/png";
                            break;
                        default:
                            this.lblStatus.Text = "Invalid file type.";
                            return;
                    }

                    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();

                }

                this.lblStatus.Text = "File Upload Successfully. Click <a href='ListPicture.aspx'>here</a> to view.";
            }
        }

        protected void btnDel_Click(object sender, EventArgs e)
        {
            this.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();
            this.lblStatus.Text = "Delete Successfully. Click <a href='ListPicture.aspx'>here</a> to view.";

        }

        protected void Page_Unload(object sender, System.EventArgs e)
        {
            objConn.Close();
            objConn = null;
        }

    }
}

ListPicture.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ListPicture.aspx.cs" Inherits="ASPNetBLOB.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" 
            onrowdatabound="myGridView_RowDataBound">
	<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.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using MySql.Data.MySqlClient;

namespace ASPNetBLOB
{
    public partial class ListPicture : System.Web.UI.Page
    {
        MySqlConnection objConn;
        MySqlCommand objCmd;
        protected void Page_Load(object sender, EventArgs e)
        {
            string strConnString = null;
            strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;";
            objConn = new MySqlConnection(strConnString);
            objConn.Open();

            BindData();
        }

        protected void BindData()
        {
            string strSQL = null;
            strSQL = "SELECT * FROM files ORDER BY FilesID ASC";

            MySqlDataReader dtReader = default(MySqlDataReader);
            objCmd = new MySqlCommand(strSQL, objConn);
            dtReader = objCmd.ExecuteReader();

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

            dtReader.Close();
            dtReader = null;
        }

        protected void myGridView_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            //*** FilesID ***'
            Label lblFilesID = (Label)e.Row.FindControl("lblFilesID");
            if ((lblFilesID != null))
            {
                lblFilesID.Text = DataBinder.Eval(e.Row.DataItem, "FilesID").ToString();
            }

            //*** Name ***'
            Label lblName = (Label)e.Row.FindControl("lblName");
            if ((lblName != null))
            {
                lblName.Text = DataBinder.Eval(e.Row.DataItem, "Name").ToString();
            }

            //*** Picture ***'
            Image ImgPic = (Image)e.Row.FindControl("ImgPic");
            if ((ImgPic != null))
            {
                ImgPic.ImageUrl = "ViewImg.aspx?FilesID= " + DataBinder.Eval(e.Row.DataItem, "FilesID").ToString();
            }

            //*** Hyperlink ***'
            HyperLink hplEdit = (HyperLink)e.Row.FindControl("hplEdit");
            if ((hplEdit != null))
            {
                hplEdit.Text = "Edit";
                hplEdit.NavigateUrl = "Edit.aspx?FilesID=" + DataBinder.Eval(e.Row.DataItem, "FilesID").ToString();
            }
        }

        protected void Page_Unload(object sender, EventArgs e)
        {
            objConn.Close();
            objConn = null;
        }
    }
}

ViewImg.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ViewImg.aspx.cs" Inherits="ASPNetBLOB.ViewImg" %>

ViewImg.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using MySql.Data.MySqlClient;

namespace ASPNetBLOB
{
    public partial class ViewImg : System.Web.UI.Page
    {
        MySqlConnection objConn = new MySqlConnection();
        MySqlCommand objCmd;
        string strConnString;
        string strSQL;

        protected void Page_Load(object sender, EventArgs e)
        {
            strConnString = "Server=localhost;User Id=root; Password=root; Database=mydatabase; Pooling=false;";
            objConn.ConnectionString = strConnString;
            objConn.Open();

            //*** DataTable ***'
            MySqlDataAdapter dtAdapter = default(MySqlDataAdapter);
            DataTable dt = 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"].ToString();
            dtAdapter.Fill(dt);

            if (dt.Rows.Count > 0)
            {
                Response.ContentType = dt.Rows[0]["FilesType"].ToString();
                Response.BinaryWrite((byte[])dt.Rows[0]["FilesName"]);
            }

            dt = null;
        }

        protected void Page_Unload(object sender, System.EventArgs e)
        {
            objConn.Close();
            objConn = null;
        }
    }
}

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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