How Can i Show preview image

[aliguldur]

Hi,
How Can i Show preview image when select file from dialogbox and then click button for save.
i tried telerik 'change avatar ' examp it working for show but i cant save image. when i try save file always error
'''' The process cannot access the file because it is being used by another process. '''
My code below

'show image with ajax

 

Protected Sub AsyncUpload1_FileUploaded(ByVal sender As Object, ByVal e As Telerik.Web.UI.FileUploadedEventArgs) Handles AsyncUpload1.FileUploaded

 

Thumbnail.Width =

 

Unit.Pixel(200)

 

Thumbnail.Height =

 

Unit.Pixel(150)

 

 

 

Dim imageData As Byte() = New Byte(e.File.InputStream.Length) {}

 

e.File.InputStream.Read(imageData, 0, e.File.InputStream.Length)

Thumbnail.DataValue = imageData

 

 

End Sub

 

'save image

 

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click

 

 

 

    For Each f As Telerik.Web.UI.UploadedFile In AsyncUpload1.UploadedFiles

 

    f.SaveAs(

 

"c:\a.jpg", True)

 

 

 

    Next

 

 

 

End Sub

 

thanks

[Genady Sergeev]

Hi aliguldur,

As we have already explained in the support thread, you need to wrap the FileStream inside using statement. This is example code:

Protected Sub AsyncUpload1_FileUploaded(ByVal sender As Object, ByVal e As FileUploadedEventArgs)
            Thumbnail.Width = Unit.Pixel(200)
            Thumbnail.Height = Unit.Pixel(150)

            Dim imageData As Byte() = New Byte(e.File.InputStream.Length) {}

            Using stream As Stream = e.File.InputStream
                stream.Read(imageData, 0, e.File.InputStream.Length)
            End Using

            Thumbnail.DataValue = imageData

        End Sub

Greetings,
Genady Sergeev
the Telerik team

[aliguldur]

i'm sorry it's not works

[Genady Sergeev]

Hello aliguldur,

Please paste here your current code so that we can take a look at it. This should have fixed the problem that you experience, however, there is a chance that in your case something else is going wrong.

Regards,
Genady Sergeev
the Telerik team

[majid]

you have to close your file

use  e.File.InputStream.close()