如何将Bitmap转换为Image并使用VB.NET在浏览器上显示截图？

Question

我试图从位图转换为base64，从base64转换为Image，因为我想在名为Image1的图像字段上显示屏幕截图。问题在于，我无法将值imagen分配给Image，它表示＆＃34;类型的值＆＃39; System.Drawing.Image＆＃39;无法转换为＆＃39; System.Web.UI.WebControls.Image＆＃39;

 Imports System.Drawing
 Imports System.Windows.Forms

 Public Class fotoPrueba
   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 Button1_Click(sender As Object, e As EventArgs)
    Dim bmp As New Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb)
    Dim base As String
    Dim imagen As Image

    base = BitmapToBase64(bmp)

    imagen = Base64ToImage(base)

    Image1 = imagen
End Sub

Public Function BitmapToBase64(ByVal image As System.Drawing.Bitmap) As String
    Dim base64 As String
    Dim memory As New System.IO.MemoryStream()
    image.Save(memory, Imaging.ImageFormat.Bmp)
    base64 = System.Convert.ToBase64String(memory.ToArray)
    memory.Close()
    memory = Nothing
    Return base64
End Function

Function Base64ToImage(ByVal base64string As String) As System.Drawing.Image
    'Setup image and get data stream together
    Dim img As System.Drawing.Image
    Dim MS As System.IO.MemoryStream = New System.IO.MemoryStream
    Dim b64 As String = base64string.Replace(" ", "+")
    Dim b() As Byte

    'Converts the base64 encoded msg to image data
    b = Convert.FromBase64String(b64)
    MS = New System.IO.MemoryStream(b)

    'creates image
    img = System.Drawing.Image.FromStream(MS)

    Return img
End Function

End Class