将VB.NET图像对象添加到HTML

我是VB.NET的新手，我创建了一个对象图像

Dim myimg As image

，其中包含一个用VB.NET生成并显示在图片框中的图像。 我想像这样将此图像添加到HTML：

Dim value$=”

" 其中值用于替换html文件中的标记，以显示在VB.NET中生成的图片

有没有办法做到这一点

借用和助手类，您可以这样做：

Imports System.IO
Imports System.Drawing.Imaging
Public Class ImageHelper

    ' Convert an image to a Base64 string by using a MemoryStream. Save the
    ' image to the MemoryStream and use Convert.ToBase64String to convert
    ' the content of that MemoryStream to a Base64 string.
    Public Shared Function ImageToBase64String(ByVal image As Image, _
                                               ByVal imageFormat As ImageFormat)

        Using memStream As New MemoryStream

            image.Save(memStream, imageFormat)

            Dim result As String = Convert.ToBase64String(memStream.ToArray())

            memStream.Close()

            Return result

            : End Using

    End Function

    ' Convert a Base64 string back to an image. Fill a MemorySTream based
    ' on the Base64 string and call the Image.FromStream() methode to
    ' convert the content of the MemoryStream to an image.
    Public Shared Function ImageFromBase64String(ByVal base64 As String)

        Using memStream As New MemoryStream(Convert.FromBase64String(base64))

            Dim result As Image = Image.FromStream(memStream)

            memStream.Close()

            Return result

        End Using

    End Function

End Class

在按钮内：

Dim myImage As Image = Image.FromFile("C:\test.png")
Dim base64 As String = ImageHelper.ImageToBase64String(myImage, ImageFormat.Png)
WebBrowser1.DocumentText = "<img alt=""Embedded Image"" src=""data:image/png;base64," & base64 & """ />"

Dim myImage As Image=Image.FromFile（“C:\test.png”）
Dim base64 As String=ImageHelper.ImageToBase64String（myImage，ImageFormat.Png）
WebBrowser1.DocumentText=“”

源标记必须有一个无法接收对象的位置。您必须先保存图像，然后使用该位置创建值$variable