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In this tutorial, you will configure a project for a ASP.NET and use ImageGear for .NET capabilities. You will also learn how to load a document, then view, rotate, and zoom it.

I. Create the Project

1. Using the desired version of Visual Studio (2010 or later):
   1. Create a new "Web Site" using C# or VB.NET.
   2. Select the ASP.NET Empty Web Site template.
   3. Set .NET Framework 4.0 as the targeted framework.
   4. Set File System for the location.
   5. Name the project ASP.NET Tutorial" and click OK.
2. In the Solution Explorer window view, right-click on the bold ASP.NET Tutorial project and choose Add > Add New Item. Choose the Web Form item and click Add. This will add the Default.aspx (and the code behind Default.aspx.cs if the code behind check box is appropriately configured).
3. Add references and required resources into your projects in one of the following ways:
   • Recommended: use our NuGet Packages. For this project, you need the following packages:
     Accusoft.ImageGear.WinForms.nupkg (https://www.nuget.org/packages/Accusoft.ImageGear.WinForms/)
   • Manually:
     1. Add the ImageGear Windows Forms tools to use in your GUI:
        1. In your Toolbox window, right-click and go to Choose Toolbox Items...
        2. In the .NET Framework Components tab, click the Browse button.
        3. Navigate to "$INSTALLDIR\ImageGear for .NET v22 64-bit\Bin\”, select ImageGear22.Web.dll, and click Open.  
        4. Repeat the process to add ImageGear22.Web.ImageDataProcessor.dll.
        5. You will see the PageView, ThumbnailView, ImGearThumbnailList and ImageGearBackEnd controls added to the list of components. Make sure they are checked and click OK. You only need to do this configuration once; in the future, you can skip this step.
     2. Manually add ImageGear22.Web.Services.dll as a reference to your project from $INSTALLDIR\ImageGear for .NET v22 64-bit\Bin\.
4. Drag an ImageGearBackEnd control from the Toolbox and drop it on the page. In Visual Studio's Source View, drop it just below the usage instructions; in Design View, drop it anywhere on the page. Adding ImageGearBackEnd to your form caused Visual Studio to copy the necessary ImageGear DLLs into the bin folder of your web site.

II. Create a Page

At this point you can create a Page in one of the following ways: 

Using Project Item Template

1. Right-click on the web site in the Visual Studio Solution Explorer and choose Add > Add New Item to add a new page to your web site, based on the ThumbnailVerticalTemplate template.
2. Switch to Visual Studio's Design View for ThumbnailSampleVertical.aspx. You most likely will see two occurrences of Error Creating Control because ImageGearBackEnd does not install the ImageGear22.Web.dll into the project.
3. Normally in design mode, a PageView, ImGearThumbnailList, or ThumbnailView control would be dragged from the Toolbox onto the Web design form by the developer, which would have installed the ImageGear22.Web.dll into the bin directory. The ThumbnailSampleVertical template is unable to perform this process automatically, so the next step is required to resolve the above error for this tutorial.
4. Select the PageView control from the ToolBox and drop it onto the top left side of the design form. Now, switch to split view in the Visual Studio window, keeping the PageView control highlighted. The following line should be highlighted in the source window somewhere near the top of the ThumbnailVertical.aspx page:
        <imgear:PageView ID="PageView1" runat="server" />
5. Delete the highlighted line, as this is an extra unnecessary control for this tutorial demo page. The ImageGear22.Web.dll and the ImageGear22.Web.ImageDataProcessor.dll should now have been added to the Bin folder in your solution project. You should still see a PageView control, but sometimes the pre-installed PageView control will not be displayed properly unless the ThumbnailSampleVertical.aspx file is closed and then reopened.
6. The next step of this tutorial will help you set up web.config. Switch back to Visual Studio's Design View (on the ThumbnailSampleVertical.aspx file page). Configure the web.config file using the PageView control's action list:
   1. First, select the PageView control.
   2. Then open the action list menu by clicking on the arrow on the top-right corner of the control.
   3. Click on the following items to add the necessary configuration settings to web.config:
      • Configure ImageGear Web Settings - This launches a separate web.config editor which sets up the necessary configuration sections in that file. Please refer to the ASP.NET Web.Config Editor Application help section for more details. Typically entering and clicking Next to get to the Save menu and selecting Save is sufficient for a default configuration. However, for this tutorial, try adding two file data providers called FileImageDataProvider1 and FileImageDataProvider2. Have them tie to viewerImages and viewerImages2 storage directories. Or simply copy the web.config file from the installed Accusoft samples folder: $INSTALLDIR\ImageGear for .NET v22 64-bit\Samples\ASP.NET\CSharp\ASP.NET Tutorial\. The folder can be found by clicking on the samples folder that is under the Accusoft folder on the Windows Start menu.
      • Configure ImageGear ASP.NET Services - This creates the required ImageGearService.svc file necessary to run the ImageGear Services to support the website being constructed in this tutorial.
7. Save your changes, and then run the application by selecting the ThumbnailSampleVertical.aspx in the Visual Studio Solution Window and right-clicking on it and choosing Set As Start Page. Then hit F5 to run the project or start the project from the Debug menu. Please note that if you installed only the 64-bit version of ImageGear, you cannot view your web site using Visual Studio; you will have to deploy it to IIS instead.
8. Next, proceed to III. Copy Code, below

Adding Controls

1. Open default.aspx in Visual Studio and switch to Design View.
2. From the AJAX Extensions section of the Visual Studio Toolbox, drag a ScriptManager onto the form. You can drop it anywhere on the form in Design View; the exact location does not matter.
3. From the HTML section of the Visual Studio Toolbox, drag five Input (Button) controls onto the form. In the Visual Studio Properties Window, change:
   • The first button's Value property to Show Full Image
   • The second button's Value property to Rotate Right
   • The third button's Value property to Draw Ellipse
   • The fourth button's Value property to Data Provider 1
   • The fifth button's Value property to Data Provider 2
4. Drag a PageView control onto the form.
5. In the Visual Studio Properties Window, change the PageView control's DocumentIdentifier property to MyImage.tif. You could use your own image, but then you would need to appropriately modify the code.
6. Create two folders named viewerImages and viewerImages2 in the root of the project. From the Accusoft sample folder $INSTALLDIR\ImageGear for .NET v22 64-bit\Samples\ASP.NET\CSharp\ASP.NET Tutorial\viewerImages\, copy the image MyImage.tif into viewerImages and ccitt.tif into viewerImages2.
7. The next step of this tutorial will help you set up web.config. Switch back to Visual Studio's Design View (on the Default.aspx file page). Configure the web.config file using the PageView control's action list:
   • First, select the PageView control.
   • Then open the action list menu by clicking on the arrow on the top-right corner of the control.
   • Click on the following items to add the necessary configuration settings to web.config:
     • Configure ImageGear Web Settings - This launches a separate web.config editor, which sets up the necessary configuration sections in that file. Please refer to the ASP.NET Web.Config Editor Application help section for more details. Typically entering and clicking Next to get to the Save menu and selecting Save is sufficient for a default configuration. However, for this tutorial, try adding two file data providers called FileImageDataProvider1 and FileImageDataProvider2. Have them tie to viewerImages and viewerImages2 storage directories. Or simply copy the web.config file from the installed Accusoft samples folder: $INSTALLDIR\ImageGear for .NET v22 64-bit\Samples\ASP.NET\CSharp\ASP.NET Tutorial\. The folder can be found by clicking on the samples folder that is under the Accusoft folder on the Windows Start menu.
     • Configure ImageGear ASP.NET Services - This creates the required ImageGearService.svc file necessary to run the ImageGear Services to support the website being constructed in this tutorial.

III. Copy Code

At this point your project is ready for copying some code. The following code can be used to load a document, view it using an PageView control, and rotate it. Moreover, you can drag a rectangle on the image to zoom in (because the MouseTool property is set to RectangleZoom) and click the button to show the full image.

Now, we will go over some areas of this sample code in more detail:

• We fit the image to the PageView control using:

  JavaScript	Copy Code
  function Button1_onclick() { $find('PageView1').fitImage(ImageGear.Web.UI.FitType.FullImage); }

• The 90 degrees rotation is performed as follows:

  JavaScript	Copy Code
  function Button2_onclick() { $find('PageView1').rotate(90); }

• We draw an Ellipse by adding the following code:

  JavaScript	Copy Code
  function Button3_onclick() { var mark = new ImageGear.Web.UI.Mark(ImageGear.Web.UI.MarkType.Ellipse); mark.set_rectangle(new ImageGear.Web.UI.Rectangle(Math.random()*800, Math.random()*800, 800, 350)); mark.set_fillColor('#ffc0cb'); mark.set_lineWidth(10); mark.set_lineColor('#008020'); mark.set_opacity(127); $find('PageView1').get_artPage().addMark(mark); }

• We load a document using:

  JavaScript	Copy Code
  function Button4_onclick() { var _ctrlView = $find('PageView1'); if (_ctrlView.get_pageIsOpen() == true) { _ctrlView.closePage(); } _ctrlView.openPage({ documentIdentifier: 'FileImageDataProvider1:myImage.tif', pageNumber: 2, viewFitType: ImageGear.Web.UI.FitType.ActualSize }); }

IV. Deploying Your Application to IIS

Let's refer to a couple of things that you will need to consider when deploying your application to IIS, given that the tutorial relies on Cassini, the development web server built into Visual Studio:

Services - Deployment Considerations

• You will need to properly configure web.config similar to the one used for your application development. If you used the smart tag on the PageView or ThumbnailView control window, you launched a program called WebConfigEditor. You may need to review the changes done on the development web.config for your deployment or run this stand-alone program on the correct web.config file that you are deploying to properly set up services.
• You will need to set up (or publish) a folder that contains the web.config and ImageGearService.svc files along with your web application (aspx, html, etc.) files.
• You will need a bin folder containing all the .dlls and PDF resource files either within the top level folder or properly configured in the web.config file for its location.
• You will need to have the image repository accessible and properly configured in the web.config file as described by the Configuring & Working with Data Providers section in this help file.
• Services under IIS can only accept one security authentication scheme. Typically the choice would be choosing either windowsAuthentication or anonymousAuthentication.
• If you are not running under IIS, but in Cassini or IISExpress, take note of the port number, as that must be used for testing the services.
• If everything has been properly done, the services should be running under IIS automatically. If the deployed application fails, you can launch a browser and type in the web URL for the services and you should see the following image in the web browser (URL may be different except for the last piece: ImageGearService.svc):

  

• If any other page is displayed, the services are not running and you will need to perform more IIS troubleshooting to understand the cause of the problem. In this case, turning on the debugging features in the web.config file may help gather more information. Make sure only one security authentication scheme is selected as noted above.

Logging

ImageGear's ASP.NET includes server-side logging to help you identify problems. To turn on this logging, you need to configure web.config. The easiest way to do that is to do the following:

1. Display an aspx page in Visual Studio's Design View.
2. Select an ImageGear PageView, ThumbnailList, or ThumbnailView control.
3. Click the arrow in the top right corner to display the action list.
4. Select Configure ImageGear Web Settings.
5. Click the Error Logging button and choose an Error Severity level.

You can adjust the amount of information that ImageGear places into the log file by selecting "Off", "Critical", "Error", "Warning", "Information", or "Verbose". These values are documented in MSDN for the System.Diagnostics.TraceLevel enumeration. The amount of information logged typically increases going from "Critical" towards "Verbose".

Application Pools on 64-bit Operating Systems

By default, IIS runs web sites in a 32-bit process on a 32-bit operating system and in a 64-bit process on a 64-bit operating system. If you wish to run the 32-bit version of ImageGear on a 64-bit machine, you should create a new Application Pool using the IIS Manager. After you create it, you should edit its Advanced Settings to enable 32-bit applications.

 

 

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