How to display the base64 formatted string into image in WPF.

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I have base64 formatted string.
I want to display that base64 string into image in WPF.

I tried the below code. but after run this code no errors.
but image not shown.

please give me a solution for this problem.

What I have tried:

xaml

<Image x:Name="img1"  Height="20" Width="20" Source="{Binding ImgSource}"/>

codebehind
dim ImgSource as Image

Dim binaryData As Byte() = Convert.FromBase64String(base64string)
Dim bi As BitmapImage = New BitmapImage()
bi.BeginInit()
bi.StreamSource = New MemoryStream(binaryData)
bi.EndInit()

Dim img As Image = New Image()
img.Source = bi

ImgSource = img

Posted 9-Jun-21 4:04am

shiva_yn

Updated 9-Jun-21 4:49am

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Richard Deeming · Accepted Answer · 2021-06-09T04:49:00

Check the output window in Visual Studio for runtime data binding errors.

There are two problems with the code you've shown:

1) You've declared the ImgSource variable as either a local variable, or a field. WPF binding only works with properties.

2) Since you're binding to something defined in your code-behind, you need to set the DataContext to the class instance which contains the property, either on the image itself, or somewhere higher up in the logical tree. The usual approach is to do that in the constructor.

VB.NET

Public Partial Class Window1 : Window
    Public Sub New()
        InitializeComponent()
        DataContext = Me
        
        Dim base64string As String = ...
        
        Dim bi As New BitmapImage()
        bi.BeginInit()
        bi.StreamSource = New MemoryStream(Convert.FromBase64String(base64String))
        bi.EndInit()
        
        Dim img As New Image()
        img.Source = bi
        ImgSource = img
    End Sub
    
    Public ReadOnly Property ImgSource As Image
End Class