ImageGear Professional for Windows ActiveX
Adding the Code
ImageGear Professional v18.2 > User Guide > Getting Started > MS Visual Studio .NET 2003 C# Application > Adding the Code
  1. Every C# Windows Application form gets the following set of using statements:
     
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    using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

    Add the following other using statements to Form1.cs:

     
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    using GearDIALOGSLib;
using GearCORELib;
using GearFORMATSLib;
using GearDISPLAYLib;
using GearPROCESSINGLib;
  2. When you added the menu items and the ImageGear ActiveX controls to your form, Visual Studio automatically added private member variables for each of them to your Form1.cs file:
     
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    public class Form1 : System.Windows.Forms.Form
{
        private System.Windows.Forms.MainMenu mainMenu1;
        private System.Windows.Forms.MenuItem mnuOpen;
        private System.Windows.Forms.MenuItem mnuZoomin;
        private System.Windows.Forms.MenuItem mnuZoomout;
        private AxGearCORELib.AxIGCoreCtl axIGCoreCtl1;
        private AxGearDISPLAYLib.AxIGDisplayCtl axIGDisplayCtl1;
        private AxGearFORMATSLib.AxIGFormatsCtl axIGFormatsCtl1;
        private AxGearDIALOGSLib.AxIGDlgsCtl axIGDlgsCtl1;
        private AxGearVIEWLib.AxIGPageViewCtl axIGPageViewCtl1;
        private AxGearPROCESSINGLib.AxIGProcessingCtl
axIGProcessingCtl1;

    You'll need to add the following other private members to the Form1 class:

     
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            private IGFileDlg m_dlgFile = null;
        private IGPage m_igPage = null;
        private IGPageDisplay m_igPageDisp = null;
  3. Next, use the Visual Studio forms designer to add Event handlers for the Load and Resize events for Form1:

  4. Add the following code to the Form1_Load() and Form1_Resize() Event Handler methods:
     
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    private void Form1_Load(object sender, System.EventArgs
e)
        {
                axIGCoreCtl1.License.SetSolutionName("Accusoft");
                axIGCoreCtl1.Result.NotificationFlags =
enumIGErrorHandlingFlags.IG_ERR_OLE_ERROR;
                try
                {
        
axIGCoreCtl1.AssociateComponent(axIGFormatsCtl1.ComponentInt
erface);
        
axIGCoreCtl1.AssociateComponent(axIGDisplayCtl1.ComponentInt
erface);
axIGCoreCtl1.AssociateComponent(axIGProcessingCtl1.Component
Interface);
                axIGDlgsCtl1.GearFormats =
axIGFormatsCtl1.ComponentInterface;
                axIGDlgsCtl1.GearCore =
axIGCoreCtl1.ComponentInterface;
                axIGDlgsCtl1.GearDisplay =
axIGDisplayCtl1.ComponentInterface;
                m_dlgFile = axIGDlgsCtl1.CreateFileDlg();
                m_igPage = axIGCoreCtl1.CreatePage();
                m_igPageDisp = axIGDisplayCtl1.CreatePageDisplay(
m_igPage);
                axIGPageViewCtl1.PageDisplay = m_igPageDisp;
                }
                catch (Exception ex)
                {
                        MessageBox.Show(ex.Message);
                }
        }
        private void Form1_Resize(object sender, System.EventArgs
e)
        {
                axIGPageViewCtl1.Left = 0;
                axIGPageViewCtl1.Top = 0;
                axIGPageViewCtl1.Width = this.ClientSize.Width;
                axIGPageViewCtl1.Height = this.ClientSize.Height;
        }

    The code above includes:

    IGCoreCtl Control License.SetSolutionName This method of the IGLicense Object sets the solution name for the ImageGear license.
      Result.NotificationFlag This method of the IGResult Object tells ImageGear to report errors using the COM Error mechanism (caught as Exceptions).
      AssociateComponent This method associates ImageGear components with the Core control.
      CreatePage This method creates and returns a new IGPage Object .
    IGDlgsCtl Control GearFormats This property sets the current Formats control used by the Dialog control.
      GearCore This property sets the current Core control used by the Dialog control
    IGDisplayCtl Control CreatePageDisplay This method creates a new IGPageDisplay Object for the specified IGPage Object.
    IGPageViewCtl Control PageDisplay This property sets the current Page Display object displayed by the Page View control.
  5. Next, create a click procedure for mnuOpen by double-clicking the menu on the form and then copying the following code into Form1.cs:
     
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      private void mnuOpen_Click(object sender,
System.EventArgs e)
        {
                try
                {
                        IGFileDlgPageLoadOptions dlgLoadOptions = null;
                        dlgLoadOptions = (IGFileDlgPageLoadOptions)
                        axIGDlgsCtl1.CreateFileDlgOptions(
enumIGFileDlgOptionsType.IG_FILEDLGOPTIONS_PAGELOADOBJ);
                        
if(m_dlgFile.Show((IIGFileDlgOptions)dlgLoadOptions))
                        {
                                axIGFormatsCtl1.LoadPageFromFile(m_igPage,
dlgLoadOptions.FileName, dlgLoadOptions.PageNum);
                        }
                        axIGPageViewCtl1.UpdateView();
                }
                catch (Exception ex)
                {
                        MessageBox.Show(ex.Message);
                }
        }

    The code above includes:

    IGDlgsCtl Control CreateFileDlgOptions This method creates a file dialog options object that will contain example the filename and page number.
    IGFileDlg Object Show This method shows the file dialog and returns True if the user clicked OK.
    IGFormatsCtl Control LoadPageFromFile This method loads an image into the specified IGPage Object from the specified filename.
  6. Finally add click procedures for the mnuZoomin and mnuZoomout commands by double-clicking each control, respectively, in the Dialog designer, and then copying the following code into Form1.cs:
     
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           private void mnuZoomin_Click(object sender,
System.EventArgs e)
        {
                try
                {
                        IGDisplayZoomInfo zoominfo = null;
                        zoominfo = (IGDisplayZoomInfo) 
                        m_igPageDisp.GetZoomInfo( axIGPageViewCtl1.hWnd );
                        zoominfo.HZoom = zoominfo.HZoom * 1.25;
                        zoominfo.VZoom = zoominfo.VZoom * 1.25;
                        zoominfo.Mode =
GearDISPLAYLib.enumIGDsplZoomModes.IG_DSPL_ZOOM_H_FIXED |
                                
GearDISPLAYLib.enumIGDsplZoomModes.IG_DSPL_ZOOM_V_FIXED;
                        m_igPageDisp.UpdateZoomFrom(zoominfo);
                        axIGPageViewCtl1.UpdateView();
                }
                catch (Exception ex)
                {
                        MessageBox.Show(ex.Message);
                }
        }

    The above code zooms the image to 125 percent, or 5/4ths, of its size (zoom in by 25 percent).

     
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            private void mnuZoomout_Click(object sender,
System.EventArgs e)
        {
                try
                {
                        IGDisplayZoomInfo zoominfo = null;
                        zoominfo = (IGDisplayZoomInfo) 
                                m_igPageDisp.GetZoomInfo(
axIGPageViewCtl1.hWnd );
                        zoominfo.HZoom = zoominfo.HZoom * 0.80;
                        zoominfo.VZoom = zoominfo.VZoom * 0.80;
                        zoominfo.Mode =
                                
GearDISPLAYLib.enumIGDsplZoomModes.IG_DSPL_ZOOM_H_FIXED |
GearDISPLAYLib.enumIGDsplZoomModes.IG_DSPL_ZOOM_V_FIXED;
                        m_igPageDisp.UpdateZoomFrom(zoominfo);
                        axIGPageViewCtl1.UpdateView();
                }
                catch (Exception ex)
                {
                        MessageBox.Show(ex.Message);
                }
        }

    The above code zooms "out", decreasing the image to 4/5ths of its size, thereby canceling the effect of the zoom in above.

    The code above includes:

    IGPageDisplay Object GetZoomInfo This method creates and returns a new IGDisplayZoomInfo Object that contains zoom mode and values.
      UpdateZoomFrom This method sets zoom mode and values from the specified IGDisplayZoomInfo Object.

 

 

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