Clipboard Images

[richkid]

Hi everyone,
I am trying to get an imagefrom the clipboard.. The senario is the user presses printScreen button on the keyboard and captures an image then go to my web page and click a button and copies the image from the clipboard and saves it to the server....

I tried using javascript and it worked for Text but not for Images :(

does anyone knows a way to get it done????

[TRScheel]

Hi everyone,
I am trying to get an imagefrom the clipboard.. The senario is the user presses printScreen button on the keyboard and captures an image then go to my web page and click a button and copies the image from the clipboard and saves it to the server....

I tried using javascript and it worked for Text but not for Images :(

does anyone knows a way to get it done????

You want this done in Javascript or ASPX?

[richkid]

any way is good for me !!!!

[TRScheel]

any way is good for me !!!!

In C# you can do this:

Image myImage;
if (Clipboard.ContainsImage())
{
    myImage = Clipboard.GetImage();
    // save image
}

Havent tried it in ASPX though... would probably take some fiddling with to work right.

[richkid]

well thanx for that.....

it works but not for aspx no clipboard obj :(

[TRScheel]

well thanx for that.....

it works but not for aspx no clipboard obj :(

Well, I did some more research into your problem and came upon this:

ASPX Clipboard

[richkid]

well.. i tried something like that b4 but i think my problem is including the .dll

I created the .dll, set the COM visible and COM class to true, copy the .dll to the web folder, add a reference from a web page and still not getting it to show in the web page... what am i doing wrong?

[TRScheel]

well.. i tried something like that b4 but i think my problem is including the .dll

I created the .dll, set the COM visible and COM class to true, copy the .dll to the web folder, add a reference from a web page and still not getting it to show in the web page... what am i doing wrong?

Care to post your code?

[richkid]

I created anew Windows Control Library Project > add a button and picture box > add the following code :

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim myImage As Image
Dim txt, path As String
path = "C:\Documents and Settings\SPY\Desktop\"

If Clipboard.ContainsImage() Then
myImage = Clipboard.GetImage()

'save image as jpeg
Dim myFormat As System.Drawing.Imaging.ImageFormat
myFormat = System.Drawing.Imaging.ImageFormat.Jpeg

myImage.Save(path & ".jpg", myFormat)
PictureBox1.Image = myImage

ElseIf Clipboard.ContainsText() Then
txt = Clipboard.GetText()
TextBox1.Text = txt

Else
Label1.Text = "Empty"
End If
End Sub


Next I run the program and get a .dll > Copy .dll to web folder > add the foll in source (html) of web page default.aspx :

<object id="myControl1" name="myControl1" classid="ScreenShot.dll#ScreenShot.ScreenControl" style="width: 572px; height: 460px">
</object>



Then add a reference to the .dll to the project


... get no error but not seeing anything on the web page!!

[TRScheel]

I am curious... try

Clipboard.SetText("This is from the clipboard")

then try and retrieve it. Something that small.

My bet is that the SetText call will throw an error.

If it does, please post the error. On continuation with that wager, it would have something to do with STA Thread or something similiar.

[richkid]

This is excerpts from the Windows Class that created the .dll;

Namespace ActiveXDotNet

Public Interface AxScreenCapture

Property Path() As String
Property FileName() As String

End Interface
End Namespace

Public Class ScreenCapture
'Inherits System.Windows.Forms.UserControl ', AxScreenCapture
Inherits System.Windows.Forms.UserControl
Implements ActiveXDotNet.AxScreenCapture

Private m_strPath As String
Private m_strFileName As String
Public strS As [String]

Public Property FileName() As String Implements ActiveXDotNet.AxScreenCapture.FileName
Get
Return m_strFileName
End Get
Set(ByVal value As String)
m_strFileName = value
End Set
End Property

//////////////////////////////////////////////////////////////////////////////////////////////////

I got the dll to work. seeing images now. Problem is to set the property on the control to a text via javascript (ex. passing a filename to property)



<object id="obj1" name="obj1" classid="GetImage.dll#GetImage.ScreenCapture" style="border-right: thin solid; border-top: thin solid; border-left: thin solid; border-bottom: thin solid; width: 480px; height: 400px;">
</object>
<input id="newButton" style="z-index: 102; left: 606px; position: absolute; top: 530px"
type="button" value="Click Me!!" onclick="doScript();"/>


<script type="text/javascript" >
function doScript()
{
obj1.FileName = "testing123"
// GetImage.ScreenCapture.FileName= "case5846"
}
</script>

//////////////////////////////////////////////////////////////////////////////////////////////////

The error message I am getting:

'obj1' undefined

Please help.

[TRScheel]

I dont profess to be a master of javascript, but I believe that you will have issues referencing obj1 directly because it is just an object, with no casting per say.

[richkid]

well finally i get this thing to show and i can now access the properties of the object using <param value>

I am trying to save the image on the server now i get the follow error::
System.Security.SecurityException:
Request for the permission of type 'System.Security.Permissions.FileIOPermission,msco rlib,Version 2.0.0.0, Culture = neutral, PublicKey Token = b77a5c561934e089' failed

any ideas?