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HOME > C# (.NET) > ASP.NET Microsoft SQL Server (System.Data.SqlClient) > (C#) ASP.NET SQL Server BLOB Binary Data and Parameterized Query

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

(C#) ASP.NET SQL Server BLOB Binary Data and Parameterized Query เขียน ASP.NET เพื่อจัดการข้อมูลใน Database SQL Server 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 System.Data.SqlClient;

ASP.NET & System.Data.SqlClient

https://www.thaicreate.com/asp.net/asp.net-system.data.sqlclient.html

การสร้างตาราง

USE [mydatabase]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[files](
[FilesID] [int] IDENTITY(1,1) NOT NULL,
[Name] [varchar](100) NULL,
[FilesName] [image] NULL,
[FilesType] [varchar](20) NULL,
CONSTRAINT [PK_files] PRIMARY KEY CLUSTERED 
(
[FilesID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO
SET ANSI_PADDING OFF

แก้ชื่อฐานข้อมูลตรง USE [mydatabase] ให้ถูกต้องแล้วทำการ Execute เพื่อสร้างฐานข้อมูล

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

ASP.NET SQL Server 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 System.Data.SqlClient;

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 ***'
                SqlConnection objConn = new SqlConnection();
                string strConnString = null;
                string strSQL = null;

                strConnString = "Server=localhost;UID=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";

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

                SqlCommand objCmd = new SqlCommand(strSQL, objConn);
				objCmd.Parameters.Add("@sName", SqlDbType.Binary).Value = this.txtName.Text;
				objCmd.Parameters.Add("@sFilesName", SqlDbType.VarChar).Value = imbByte;
				objCmd.Parameters.Add("@sFilesType", SqlDbType.Int).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" />            
       </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 System.Data.SqlClient;

namespace ASPNetBLOB
{
    public partial class Edit : System.Web.UI.Page
    {
        SqlConnection objConn = new SqlConnection();
        SqlCommand 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;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";
            objConn.ConnectionString = strConnString;
            objConn.Open();

            if (!Page.IsPostBack)
            {
                ViewData();
            }
        }

        protected void ViewData()
        {
            //*** DataTable ***'
            SqlDataAdapter dtAdapter = default(SqlDataAdapter);
            DataTable dt = new DataTable();
            strSQL = "SELECT * FROM files WHERE FilesID = @sFilesID ";
            dtAdapter = new SqlDataAdapter(strSQL, objConn);
            objCmd = dtAdapter.SelectCommand;
            objCmd.Parameters.Add("@sFilesID", SqlDbType.Int).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 SqlCommand(strSQL, objConn);
                objCmd.Parameters.Add("@sName", SqlDbType.VarChar).Value = this.txtName.Text;
                objCmd.Parameters.Add("@sFilesID", SqlDbType.Int).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 SqlCommand(strSQL, objConn);
                    objCmd.Parameters.Add("@sFilesName", SqlDbType.Binary).Value = imbByte;
                    objCmd.Parameters.Add("@sFilesType", SqlDbType.VarChar).Value = strMIME;
                    objCmd.Parameters.Add("@sFilesID", SqlDbType.Int).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 SqlCommand(strSQL, objConn);
            objCmd.Parameters.Add("@sFilesID", SqlDbType.Int).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 System.Data.SqlClient;

namespace ASPNetBLOB
{
    public partial class ListPicture : System.Web.UI.Page
    {
        SqlConnection objConn;
        SqlCommand objCmd;
        protected void Page_Load(object sender, EventArgs e)
        {
            string strConnString = null;
            strConnString = "Server=localhost;UID=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";
            objConn = new SqlConnection(strConnString);
            objConn.Open();

            BindData();
        }

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

            SqlDataReader dtReader = default(SqlDataReader);
            objCmd = new SqlCommand(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 System.Data.SqlClient;

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

        protected void Page_Load(object sender, EventArgs e)
        {
            strConnString = "Server=localhost;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;";
            objConn.ConnectionString = strConnString;
            objConn.Open();

            //*** DataTable ***'
            SqlDataAdapter dtAdapter = default(SqlDataAdapter);
            DataTable dt = new DataTable();
            strSQL = "SELECT * FROM files WHERE FilesID = @sFilesID ";
            dtAdapter = new SqlDataAdapter(strSQL, objConn);
            objCmd = dtAdapter.SelectCommand;
            objCmd.Parameters.Add("@sFilesID", SqlDbType.Int).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 SQL Server BLOB Binary Data

Screen หน้าจอสำหรับอัพโหลด (Upload Binary) ข้อมูลลงใน BLOB

ASP.NET SQL Server BLOB Binary Data

Screen หน้าจอสำหรับแสดงข้อมูล (View BLOB)

ASP.NET SQL Server BLOB Binary Data

Screen หน้าจอสำหรับแก้ไขข้อมูล (Edit BLOB)

ASP.NET SQL Server BLOB Binary Data

Screen หน้าจอสำหรับการลบข้อมูล (Delete BLOB)

ASP.NET System.Data.SqlClient - Parameter Query

https://www.thaicreate.com/asp.net/asp.net-system.data.sqlclient-parameter-query.html

ASP.NET & System.Data.SqlClient

https://www.thaicreate.com/asp.net/asp.net-system.data.sqlclient.html

ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน Source Code 2.0 ของทีมงานไทยครีเอท

ลองใช้ค้นหาข้อมูล


	By :	ThaiCreate.Com Team (บทความเป็นลิขสิทธิ์ของเว็บไทยครีเอทห้ามนำเผยแพร่ ณ เว็บไซต์อื่น ๆ)
	Score Rating :
	Create/Update Date :	2011-06-02 14:23:54 / 2017-03-29 10:33:47
	Download :

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