How to save image(picture) from WebBrowser control

Question

Hi every one

 i have a webbrowser control which helps me browsing internet in my application. when i get a picture  (image) i needed, i want to save it into local drive. i could do it by right-clicking the image and in the context menu by clicking "Save Picture As...". But i wanted to do it programaticlly. i wanted to save the picture programaticlly. I googeled a lot i cann't find any thing that helps me. please help me.

                      thanks

Answer 1

 

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1830091&SiteID=1

Answer 2

Hi Vien,

 

This code sample may be helpful.

It can download image file from internet/website (using HttpWebRequest and HttpWebResponse classes) to local computer.

 

Prerequisites: Button1, Label1 and ProgressBar1 on Form1.

Code Block

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Dim file As String = "http://URL/image.jpg"  'Specify URL of an image

        Dim request As System.Net.WebRequest = System.Net.HttpWebRequest.Create(file)

        Dim response As System.Net.HttpWebResponse = request.GetResponse()

        Dim stream As System.IO.Stream = response.GetResponseStream()

        ' Get the length of the content

        Dim length As Integer = response.ContentLength

        ' Set the maximum length of the progress bar.

        ProgressBar1.Maximum = length

        ' Create a temporary array for the content of the file.

        Dim bytes(length) As Byte

        ' Get all bytes of the content and advance the progress bar.

        For i As Integer = 0 To length - 1

            bytes(i) = stream.ReadByte()

            ProgressBar1.Value = i

            Label1.Text = i.ToString + "Bytes Downloaded"

            Application.DoEvents()

        Next

        ' Write the content to the local file.

        Using output As IO.Stream = System.IO.File.Create("D:\newImg.jpg")

            output.Write(bytes, 0, bytes.Length)

        End Using

    End Sub

 

 

Regards,

Martin

Answer 3

Hi Vien,

 

I work it out.

 

An image format in HTML is like this: <img src="http://www.google.co.uk/logos/halloween07.gif">

 

Step 1. Get all img elements:      

Dim theElementCollection As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("img")

 

Step 2. Get each URL of img element:     

        For Each curElement As HtmlElement In theElementCollection

            Dim imgURL As String = curElement.GetAttribute("src").ToString

        Next

 

Step 3. Then download image file using HttpWebRequest and HttpWebResponse classes.

 

The following code sample can save each image from webpage loaded in WebBrowser1 to local computer.

Prerequisites: WebBrowser1 and Button1 on Form1.

Code Block

Public Class Form1

 

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        WebBrowser1.Navigate("http://msdn2.microsoft.com/en-us/default.aspx")

    End Sub

 

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

   

        '<img src="http://www.google.co.uk/logos/halloween07.gif">

 

        Dim theElementCollection As HtmlElementCollection = Me.WebBrowser1.Document.GetElementsByTagName("img")

        Dim n As Int32 = theElementCollection.Count

        Dim index As Int32 = 1

        For Each curElement As HtmlElement In theElementCollection

 

            'MessageBox.Show(curElement.GetAttribute("src").ToString)

            Dim imgURL As String = curElement.GetAttribute("src").ToString

            Dim request As System.Net.WebRequest = System.Net.HttpWebRequest.Create(imgURL)

            Dim response As System.Net.HttpWebResponse = request.GetResponse()

            Dim stream As System.IO.Stream = response.GetResponseStream()

            ' Get the length of the content

            Dim length As Integer = response.ContentLength

 

            Dim bytes(length) As Byte

 

            For i As Integer = 0 To length - 1

                bytes(i) = stream.ReadByte()

                Application.DoEvents()

            Next

            ' Save each image in turn.

            Using output As IO.Stream = System.IO.File.Create("D:\Image" + index.ToString + ".jpg")

                output.Write(bytes, 0, bytes.Length)

            End Using

            index += 1

        Next

 

    End Sub

End Class

 

 

Best regards,

Martin

Answer 4

Use URLDownloadToCacheFile. The image is likely in the IE cache already.

Answer 5

thank you everybody..this answers also helped me in my code!
Regards

Answer 6

agreed much thanks exactly what i needed