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ASP.NET BLOB Storing Binary Data

ASP.NET BLOB Storing Binary Data ตัวอย่าง asp.net กับการจัดเก็บข้อมูลในรูปแบบของ Binary Data ลงในฐานข้อมูลต่าง ๆ ผ่าน BLOB Data type กับฐานข้อมูล เช่น Microsoft Access , SQL Server , Oracle , MySQL

1. ASP.NET BLOB and Access Database

Code (VB.NET)
Imports System.Data
Imports System.Data.OleDb

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 OleDbConnection
            Dim strConnString, strSQL As String

			strConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="& _
			Server.MapPath("App_Data/mydatabase.mdb")&";Jet OLEDB:Database Password=;"

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

            Dim objCmd As New OleDbCommand(strSQL, objConn)
            objCmd.Parameters.Add("@sName", OleDbType.VarChar).Value = Me.txtName.Text
            objCmd.Parameters.Add("@sFilesName", OleDbType.Binary).Value = imbByte
            objCmd.Parameters.Add("@sFilesType", OleDbType.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
อ่านเต็มรูปแบบได้ที่ : ASP.NET Access BLOB Binary Data and Parameterized Query








2. ASP.NET BLOB and MySQL Database

Code (VB.NET)
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
อ่านเต็มรูปแบบได้ที่ : ASP.NET MySQL BLOB Binary Data and Parameterized Query




3. ASP.NET BLOB and SQL Server Database

Code (VB.NET)
Imports System.Data
Imports System.Data.SqlClient

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 SqlConnection
            Dim strConnString, strSQL As String

            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()

            Dim objCmd As New SqlCommand(strSQL, objConn)
            objCmd.Parameters.Add("@sName", SqlDbType.VarChar).Value = Me.txtName.Text
            objCmd.Parameters.Add("@sFilesName", SqlDbType.Binary).Value = imbByte
            objCmd.Parameters.Add("@sFilesType", SqlDbType.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
อ่านเต็มรูปแบบได้ที่ : ASP.NET SQL Server BLOB Binary Data and Parameterized Query








4. ASP.NET BLOB and Oracle Database

Code (VB.NET)
Imports System.Data
Imports System.Data.OracleClient

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 OracleConnection
            Dim strConnString, strSQL As String

			strConnString = "Data Source=TCDB;User Id=myuser;Password=mypassword;"

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

            Dim objCmd As New OracleCommand(strSQL, objConn)
            objCmd.Parameters.Add(":sName", OracleType.VarChar).Value = Me.txtName.Text
            objCmd.Parameters.Add(":sFilesName", OracleType.Blob).Value = imbByte
            objCmd.Parameters.Add(":sFilesType", OracleType.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
อ่านเต็มรูปแบบได้ที่ : ASP.NET Oracle BLOB Binary Data and Parameterized Query


   
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  Article : บทความเป็นการเขียนโดยสมาชิก หากมีปัญหาเรื่องลิขสิทธิ์ กรุณาแจ้งให้ทาง webmaster ทราบด้วยครับ
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