[es] - screenshot kontrole sa forme

Oliver Klaćik
Vice President, Thunder Road Software Inc.
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Re: screenshot kontrole sa forme

^{21.02.2006. u 08:50}

Pogledaj ovde:

http://www.c-sharpcorner.com/U...005234547PM/ScreenCapture.aspx

A pade mi na pamet i ova varijanta, ako si u mogućnosti da koristiš Print Screen na tastaturi:

Code:

        If Clipboard.ContainsImage Then
            Dim b As Bitmap = CType(Clipboard.GetImage, Bitmap)
            b.Save("C:\1.bmp")
        End If

Btw, ne služi forum da dobiješ gotova rešenja, već da te neko uputi u pravom smeru. Ako ja treba da listam MSDN zbog tebe, koja je poenta?

Oliver 'FAQ' Klaćik

^{21.02.2006. u 08:50}

mmix
Miljan Mitrovic
Software Architect
Pancevo, Srbija

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Re: screenshot kontrole sa forme

^{21.02.2006. u 15:27}

Decku treba screenshot kontrole, ne celog ekrana...

Primer koji je dat je ok, treba ga samo modifikovati da koristi HDC kontrole umesto HDC-a ekrana:

Code:

using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;

class GDI32
{
    [DllImport("GDI32.dll")]
    public static extern bool BitBlt(System.IntPtr hdcDest,int nXDest,int nYDest,int nWidth,int nHeight,System.IntPtr hdcSrc,int nXSrc,int nYSrc,int dwRop);
    [DllImport("GDI32.dll")]
    public static extern System.IntPtr CreateCompatibleBitmap(System.IntPtr hdc,int nWidth, int nHeight);[DllImport("GDI32.dll")]
    public static extern System.IntPtr CreateCompatibleDC(System.IntPtr hdc);
    [DllImport("GDI32.dll")]
    public static extern bool DeleteDC(System.IntPtr hdc);
    [DllImport("GDI32.dll")]
    public static extern bool DeleteObject(System.IntPtr hObject);
    [DllImport("GDI32.dll")]
    public static extern int SelectObject(System.IntPtr hdc, System.IntPtr hgdiobj);
}

class Export
{
    public static void SaveControlImage(Control ctrl, string path)
    {
        Graphics graph = Graphics.FromHwnd(ctrl.Handle);
        System.IntPtr ctrlHdc = graph.GetHdc();

        System.IntPtr hdcDest = GDI32.CreateCompatibleDC(ctrlHdc);
        System.IntPtr hBitmap = GDI32.CreateCompatibleBitmap(ctrlHdc, ctrl.Width, ctrl.Height);
        GDI32.SelectObject(hdcDest, hBitmap);
        GDI32.BitBlt(hdcDest, 0, 0, ctrl.Width, ctrl.Height, ctrlHdc, 0, 0, 0x00CC0020);

        Bitmap bmp = new Bitmap(Image.FromHbitmap(hBitmap), ctrl.Width, ctrl.Height);
        bmp.Save(path, System.Drawing.Imaging.ImageFormat.Bmp);
        graph.ReleaseHdc(ctrlHdc);
        GDI32.DeleteDC(hdcDest);
        GDI32.DeleteObject(hBitmap);
    }
}

pozivom Export.SaveControlImage prebacice se area koji kontrola zauzima u BMP fajl. Postoji samo jedan problem sa ovim, diaply HDC nije multi-layer, sto ce reci uradice snapshot onoga sto se trenutno nalazi na erkanu na tim pozicijama (ako je tvoja aplikacija pokrivena nekom drugom dobices sliku iz te druge aplikacije

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^{21.02.2006. u 15:27}