Upload Image in ASP.NET VB

Is there any way an image can be uploaded with ASP.NET with VB?

I need an "upload" button on the ASP.NET side.

I already have an image field in the table in SQL server 200开发者_开发问答8.

Is there any way I can do this?

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1. Add a fileupload control with:

<asp:FileUpload runat="server" id="FileUpload1" />

2. Add an upload button, and place this in the button click event handler:

    Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As EventArgs)

        Dim bldgIDNum As Int32 = FormView_Building.SelectedValue
        If FileUpload1.PostedFile IsNot Nothing AndAlso FileUpload1.PostedFile.FileName <> "" Then
            Dim imageSize As Byte() = New Byte(FileUpload1.PostedFile.ContentLength - 1) {}
            Dim uploadedImage__1 As HttpPostedFile = FileUpload1.PostedFile
            uploadedImage__1.InputStream.Read(imageSize, 0, CInt(FileUpload1.PostedFile.ContentLength))

            ' Create SQL Connection 
            Dim con As New SqlConnection()
            con.ConnectionString = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString

            ' Create SQL Command 

            Dim cmd As New SqlCommand()
            cmd.CommandText = "INSERT INTO Table (PrimaryKey,ImageData) VALUES (@PrimaryKey,@ImageData)"
            cmd.CommandType = CommandType.Text
            cmd.Connection = con

            Dim PrimaryKey As New SqlParameter("@PrimaryKey", SqlDbType.Int, 32)
            PrimaryKey.Value = (however you want to get it)

            Dim UploadedImage__2 As New SqlParameter("@ImageData", SqlDbType.Image, imageSize.Length)
            UploadedImage__2.Value = imageSize
            cmd.Parameters.Add(UploadedImage__2)
            con.Open()
            Dim result As Integer = cmd.ExecuteNonQuery()
            con.Close()
            If result > 0 Then
                lblMessage.Text = "File Uploaded"
            End If

        End If

        ListView_BldgImages.DataBind()

    End Sub

3. The database column ImageData should be varbinary(max)

4. Create a handler called Handler_Image.ashx with the following content:

Imports System
Imports System.Web
Imports System.Configuration
Imports System.Data.SqlClient

Public Class Handler_Image : Implements IHttpHandler
    
    Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
        Dim con As New SqlConnection()
        con.ConnectionString = ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString
        
        ' Create SQL Command 
        
        Dim cmd As New SqlCommand()
        cmd.CommandText = "Select ImageData from Table where PrimaryKey =@PrimaryKey"
        cmd.CommandType = System.Data.CommandType.Text
        cmd.Connection = con
        
        Dim ID As New SqlParameter("@PrimaryKey", System.Data.SqlDbType.Int)
        ID.Value = context.Request.QueryString("PrimaryKey")
        cmd.Parameters.Add(ID)
        con.Open()
        Dim dReader As SqlDataReader = cmd.ExecuteReader()
        dReader.Read()
        context.Response.BinaryWrite(DirectCast(dReader("ImageData"), Byte()))
        dReader.Close()
        con.Close()
    End Sub
 
    Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
        Get
            Return False
        End Get
    End Property

End Class

5. Display the image with an image control with the following property: ImageUrl='<%# "Handler_Image.ashx?PrimaryKey=" & Eval("PrimaryKey")%>'

6. Replace the connectionstring, the table name, and the primary key to suit your application