Voorbeeld: Entiteitsafbeeldingen instellen en ophalen

Artikel
03/04/2017

Gepubliceerd: januari 2017

Is van toepassing op: Dynamics 365 (online), Dynamics 365 (on-premises), Dynamics CRM 2016, Dynamics CRM Online

Deze voorbeeldcode is voor Microsoft Dynamics 365 (online en on-premises).Download het Microsoft Dynamics CRM SDK-pakket. U vindt deze op de volgende locatie in het download-pakket:

SampleCode\CS\GeneralProgramming\LateBound\EntityImages.cs

Vereisten

Voor meer informatie over de vereisten voor het uitvoeren van de voorbeeldcode in deze SDK, zie Het voorbeeld en de helpercode gebruiken.

Demonstreert

In dit voorbeeld wordt weergegeven hoe u gegevens instelt en ophaalt voor entiteitsafbeeldingen.

Het voorbeeld voert de volgende taken uit:

Gebruikt de CreateImageAttributeDemoEntity-methode om:
1. Een aangepaste entiteit met de schemanaam sample_ImageAttributeDemo en een primair kenmerk met de schemanaam sample_Name te maken.
2. Een afbeeldingskenmerk met de schemanaam EntityImage te maken. Alle afbeeldingskenmerken gebruiken deze naam.
3. Het hoofdformulier ophalen en bijwerken voor de entiteit sample_ImageAttributeDemo om het kenmerk <form> (FormXml)showImage op true in te stellen zodat de afbeelding in het formulier wordt weergegeven..
4. De sample_ImageAttributeDemo-entiteit publiceren.

Maakt vijf nieuwe records voor de entiteit sample_ImageAttributeDemo met vijf afbeeldingen met verschillende afmetingen in de Images-map zoals hier aangegeven.

De relatieve grootte van bronafbeeldingen

De primaire kenmerkveldwaarde sample_Name is de naam van het bestand.

Nadat elke record is gemaakt, hebt u de mogelijkheid om de record in de webbrowsertoepassing te bekijken met de ShowEntityFormInBrowser-methode zodat u kunt zien hoe de grootte van de bronafbeeldingen wordt gewijzigd om in het formulier te passen.


//Use a 144x144 pixel image
Entity imageEntity1 = new Entity(_customEntityName.ToLower());
imageEntity1["sample_name"] = "144x144.png";
imageEntity1["entityimage"] = File.ReadAllBytes("Images\\144x144.png");
Guid imageEntity1Id = _serviceProxy.Create(imageEntity1);
ShowEntityFormInBrowser(promptforDelete, "144x144.png", imageEntity1Id);

//Use a 144x400 pixel image
Entity imageEntity2 = new Entity(_customEntityName.ToLower());
imageEntity2["sample_name"] = "144x400.png";
imageEntity2["entityimage"] = File.ReadAllBytes("Images\\144x400.png");
Guid imageEntity2Id = _serviceProxy.Create(imageEntity2);     
ShowEntityFormInBrowser(promptforDelete, "144x400.png", imageEntity2Id);

//Use a 400x144 pixel image
Entity imageEntity3 = new Entity(_customEntityName.ToLower());
imageEntity3["sample_name"] = "400x144.png";
imageEntity3["entityimage"] = File.ReadAllBytes("Images\\400x144.png");
Guid imageEntity3Id = _serviceProxy.Create(imageEntity3);
ShowEntityFormInBrowser(promptforDelete, "400x144.png", imageEntity3Id);

//Use a 400x500 pixel image
Entity imageEntity4 = new Entity(_customEntityName.ToLower());
imageEntity4["sample_name"] = "400x500.png";
imageEntity4["entityimage"] = File.ReadAllBytes("Images\\400x500.png");
Guid imageEntity4Id = _serviceProxy.Create(imageEntity4);
ShowEntityFormInBrowser(promptforDelete, "400x500.png", imageEntity4Id);

//Use a 60x80 pixel image
Entity imageEntity5 = new Entity(_customEntityName.ToLower());
imageEntity5["sample_name"] = "60x80.png";
imageEntity5["entityimage"] = File.ReadAllBytes("Images\\60x80.png");
Guid imageEntity5Id = _serviceProxy.Create(imageEntity5);
ShowEntityFormInBrowser(promptforDelete, "60x80.png", imageEntity5Id);

Notitie

Deze code gebruikt late gebonden entiteiten omdat de entiteit in het voorbeeld is gemaakt en niet beschikbaar is als een klasse met sterke typen. Nadat de eerder gebonden klassen zijn gegenereerd, kunnen de klassen met sterke typen echter worden gebruikt.Meer informatie:Eerder gebonden entiteitklassen maken met het hulpmiddel voor het genereren van code (CrmSvcUtil.exe)

Haalt de records met het kenmerk entityimage op en slaat de bestanden op waarvan de grootte is gewijzigd. Als u het voorbeeld hebt uitgevoerd, kunt u de bestanden die zijn opgeslagen in de map \bin\Debug zoeken.


     //Retrieve and download the binary images
     string binaryImageQuery =
String.Format(@"<fetch mapping='logical'>
  <entity name='{0}'>
    <attribute name='sample_name' />
    <attribute name='entityimage' />
  </entity>
</fetch>",_customEntityName.ToLower());

     EntityCollection binaryImageResults = _serviceProxy.RetrieveMultiple(new FetchExpression(binaryImageQuery));


     Console.WriteLine("Records retrieved and image files saved to: {0}", Directory.GetCurrentDirectory());
     foreach (Entity record in binaryImageResults.Entities)
     {
      String recordName = record["sample_name"] as String;
      String downloadedFileName = String.Format("Downloaded_{0}", recordName);
      byte[] imageBytes = record["entityimage"] as byte[];
      var fs = new BinaryWriter(new FileStream(downloadedFileName, FileMode.Append, FileAccess.Write));
      fs.Write(imageBytes);
      fs.Close();
      Console.WriteLine(downloadedFileName);
     }

De grootte van de afbeeldingsbestanden wordt gewijzigd zoals hier aangegeven.

De relatieve grootte van gedownloade afbeeldingen

Haalt de records met het kenmerk entityimage_url op en geeft de relatieve URL-waarden weer die u in de toepassing kunt opnemen voor toegang tot de afbeeldingen. Deze query moet ontvankelijker zijn omdat de hoeveelheid overgedragen gegevens kleiner is.
```
     //Retrieve and the records with just the url
     string imageUrlQuery =
String.Format(@"<fetch mapping='logical'>
  <entity name='{0}'>
    <attribute name='sample_name' />
    <attribute name='entityimage_url' />
  </entity>
</fetch>", _customEntityName.ToLower());

     EntityCollection imageUrlResults = _serviceProxy.RetrieveMultiple(new FetchExpression(imageUrlQuery));


     Console.WriteLine("These are the relative URLs for the images retrieved:");
     foreach (Entity record in imageUrlResults.Entities)
     {
      String imageUrl = record["entityimage_url"] as String;
      Console.WriteLine(imageUrl);
     }
```
Relatieve URL's zien er bijvoorbeeld als de volgende voorbeelden uit:
- /Image/download.aspx?Entity=sample_imageattributedemo&Attribute=entityimage&Id=2ed5a666-7b51-e311-9088-00155d9c5607&Timestamp=635205044273046819
- /Image/download.aspx?Entity=sample_imageattributedemo&Attribute=entityimage&Id=22f17c6d-7b51-e311-9088-00155d9c5607&Timestamp=635205044320978850
- /Image/download.aspx?Entity=sample_imageattributedemo&Attribute=entityimage&Id=24f17c6d-7b51-e311-9088-00155d9c5607&Timestamp=635205044333049824
- /Image/download.aspx?Entity=sample_imageattributedemo&Attribute=entityimage&Id=26f17c6d-7b51-e311-9088-00155d9c5607&Timestamp=635205044343080227
- /Image/download.aspx?Entity=sample_imageattributedemo&Attribute=entityimage&Id=28f17c6d-7b51-e311-9088-00155d9c5607&Timestamp=635205044353421800

De DeleteImageAttributeDemoEntity-methode biedt u de optie om de sample_ImageAttributeDemo-entiteit te verwijderen en de status van uw organisatie van voordat u het voorbeeld uitvoerde te herstellen. U kunt niet het voorbeeld opnieuw uitvoeren nadat u deze entiteit hebt verwijderd.

Voorbeeld

Hierna volgt de volledige code voor het voorbeeld.


using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Diagnostics;
using System.Xml.Linq;
using System.IO;

// These namespaces are found in the Microsoft.Xrm.Sdk.dll assembly
// located in the SDK\bin folder of the SDK download.
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Client;
using Microsoft.Xrm.Sdk.Discovery;
using Microsoft.Xrm.Sdk.Messages;
using Microsoft.Xrm.Sdk.Metadata;

// This namespace is found in Microsoft.Crm.Sdk.Proxy.dll assembly
// found in the SDK\bin folder.
using Microsoft.Crm.Sdk.Messages;

namespace Microsoft.Crm.Sdk.Samples
{
 /// <summary>
 /// Demonstrates how to do create and retrieve records with image data
 /// </summary>
 /// <remarks>
 /// At run-time, you will be given the option to delete all the
 /// database records created by this program.</remarks>
 public class EntityImages
 {
  #region Class Level Members
  private OrganizationServiceProxy _serviceProxy;
  private const String _customEntityName = "sample_ImageAttributeDemo";
  #endregion Class Level Members

  #region How To Sample Code
  /// <summary>
  /// This method first connects to the Organization service. Afterwards,
  /// a custom entity is created and configured to support entity images.
  /// Then records are created using this custom entity with image data. 
  /// The records are then retrieved and the resized images are saved.
  /// Finally, the custom entity can be deleted.
  /// </summary>
  /// <param name="serverConfig">Contains server connection information.</param>
  /// <param name="promptforDelete">When True, the user will be prompted to delete all
  /// created entities.</param>
  public void Run(ServerConnection.Configuration serverConfig, bool promptforDelete)
  {
   try
   {
    // Connect to the Organization service. 
    // The using statement assures that the service proxy will be properly disposed.
    using (_serviceProxy = ServerConnection.GetOrganizationProxy(serverConfig))
    {
     // This statement is required to enable early-bound type support.
     _serviceProxy.EnableProxyTypes();

     Console.WriteLine("Please wait while the custom Image Attribute Demo entity used by this sample is created.");
     //Creates the Image Attribute Demo entity used in this sample
     CreateImageAttributeDemoEntity();

     //Create 5 records using different sized images.
     /*

      This sample uses late-binding because the entity was just created and is
      not included in the 'MyOrganizationsCrmSdkTypes.cs' file created by the 
      code generation tool (CrmSvcUtil.exe)

     */
     //Use a 144x144 pixel image
     Entity imageEntity1 = new Entity(_customEntityName.ToLower());
     imageEntity1["sample_name"] = "144x144.png";
     imageEntity1["entityimage"] = File.ReadAllBytes("Images\\144x144.png");
     Guid imageEntity1Id = _serviceProxy.Create(imageEntity1);
     ShowEntityFormInBrowser(promptforDelete, "144x144.png", imageEntity1Id);

     //Use a 144x400 pixel image
     Entity imageEntity2 = new Entity(_customEntityName.ToLower());
     imageEntity2["sample_name"] = "144x400.png";
     imageEntity2["entityimage"] = File.ReadAllBytes("Images\\144x400.png");
     Guid imageEntity2Id = _serviceProxy.Create(imageEntity2);     
     ShowEntityFormInBrowser(promptforDelete, "144x400.png", imageEntity2Id);

     //Use a 400x144 pixel image
     Entity imageEntity3 = new Entity(_customEntityName.ToLower());
     imageEntity3["sample_name"] = "400x144.png";
     imageEntity3["entityimage"] = File.ReadAllBytes("Images\\400x144.png");
     Guid imageEntity3Id = _serviceProxy.Create(imageEntity3);
     ShowEntityFormInBrowser(promptforDelete, "400x144.png", imageEntity3Id);

     //Use a 400x500 pixel image
     Entity imageEntity4 = new Entity(_customEntityName.ToLower());
     imageEntity4["sample_name"] = "400x500.png";
     imageEntity4["entityimage"] = File.ReadAllBytes("Images\\400x500.png");
     Guid imageEntity4Id = _serviceProxy.Create(imageEntity4);
     ShowEntityFormInBrowser(promptforDelete, "400x500.png", imageEntity4Id);

     //Use a 60x80 pixel image
     Entity imageEntity5 = new Entity(_customEntityName.ToLower());
     imageEntity5["sample_name"] = "60x80.png";
     imageEntity5["entityimage"] = File.ReadAllBytes("Images\\60x80.png");
     Guid imageEntity5Id = _serviceProxy.Create(imageEntity5);
     ShowEntityFormInBrowser(promptforDelete, "60x80.png", imageEntity5Id);
     Console.WriteLine();
     //Retrieve and download the binary images
     string binaryImageQuery =
String.Format(@"<fetch mapping='logical'>
  <entity name='{0}'>
    <attribute name='sample_name' />
    <attribute name='entityimage' />
  </entity>
</fetch>",_customEntityName.ToLower());

     EntityCollection binaryImageResults = _serviceProxy.RetrieveMultiple(new FetchExpression(binaryImageQuery));


     Console.WriteLine("Records retrieved and image files saved to: {0}", Directory.GetCurrentDirectory());
     foreach (Entity record in binaryImageResults.Entities)
     {
      String recordName = record["sample_name"] as String;
      String downloadedFileName = String.Format("Downloaded_{0}", recordName);
      byte[] imageBytes = record["entityimage"] as byte[];
      var fs = new BinaryWriter(new FileStream(downloadedFileName, FileMode.Append, FileAccess.Write));
      fs.Write(imageBytes);
      fs.Close();
      Console.WriteLine(downloadedFileName);
     }
     Console.WriteLine();
     //Retrieve and the records with just the url
     string imageUrlQuery =
String.Format(@"<fetch mapping='logical'>
  <entity name='{0}'>
    <attribute name='sample_name' />
    <attribute name='entityimage_url' />
  </entity>
</fetch>", _customEntityName.ToLower());

     EntityCollection imageUrlResults = _serviceProxy.RetrieveMultiple(new FetchExpression(imageUrlQuery));


     Console.WriteLine("These are the relative URLs for the images retrieved:");
     foreach (Entity record in imageUrlResults.Entities)
     {
      String imageUrl = record["entityimage_url"] as String;
      Console.WriteLine(imageUrl);
     }


     DeleteImageAttributeDemoEntity(promptforDelete);
    }
   }

   // Catch any service fault exceptions that Microsoft Dynamics CRM throws.
   catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>)
   {
    // You can handle an exception here or pass it back to the calling method.
    throw;
   }
  }

  /// <summary>
  /// Creates any entity records that this sample requires.
  /// </summary>
  public void CreateImageAttributeDemoEntity()
  {
   //Create a Custom entity
   CreateEntityRequest createrequest = new CreateEntityRequest
   {

    //Define the entity
    Entity = new EntityMetadata
    {
     SchemaName = _customEntityName,
     DisplayName = new Label("Image Attribute Demo", 1033),
     DisplayCollectionName = new Label("Image Attribute Demos", 1033),
     Description = new Label("An entity created by an SDK sample to demonstrate how to upload and retrieve entity images.", 1033),
     OwnershipType = OwnershipTypes.UserOwned,
     IsActivity = false,

    },

    // Define the primary attribute for the entity
    PrimaryAttribute = new StringAttributeMetadata
    {
     SchemaName = "sample_Name",
     RequiredLevel = new AttributeRequiredLevelManagedProperty(AttributeRequiredLevel.None),
     MaxLength = 100,
     FormatName = StringFormatName.Text,
     DisplayName = new Label("Name", 1033),
     Description = new Label("The primary attribute for the Image Attribute Demo entity.", 1033)
    }

   };
   _serviceProxy.Execute(createrequest);
   Console.WriteLine("The Image Attribute Demo entity has been created.");

   //Create an Image attribute for the custom entity
   // Only one Image attribute can be added to an entity that doesn't already have one.
   CreateAttributeRequest createEntityImageRequest = new CreateAttributeRequest
   {
    EntityName = _customEntityName.ToLower(),
    Attribute = new ImageAttributeMetadata
    {
     SchemaName = "EntityImage", //The name is always EntityImage
     //Required level must be AttributeRequiredLevel.None
     RequiredLevel = new AttributeRequiredLevelManagedProperty(AttributeRequiredLevel.None), 
     DisplayName = new Label("Image", 1033),
     Description = new Label("An image to show with this demonstration.", 1033)

    }
   };
   _serviceProxy.Execute(createEntityImageRequest);
   Console.WriteLine("The Image attribute has been created.");

   QueryExpression qe = new QueryExpression("systemform");
   qe.Criteria.AddCondition("type", ConditionOperator.Equal, 2); //main form
   qe.Criteria.AddCondition("objecttypecode", ConditionOperator.Equal, _customEntityName.ToLower()); 
   qe.ColumnSet.AddColumn("formxml");

   SystemForm ImageAttributeDemoMainForm = (SystemForm)_serviceProxy.RetrieveMultiple(qe).Entities[0];

   XDocument ImageAttributeDemoMainFormXml = XDocument.Parse(ImageAttributeDemoMainForm.FormXml);
   //Set the showImage attribute so the entity image will be displayed
   ImageAttributeDemoMainFormXml.Root.SetAttributeValue("showImage", true);

   //Updating the entity form definition
   ImageAttributeDemoMainForm.FormXml = ImageAttributeDemoMainFormXml.ToString();

   _serviceProxy.Update(ImageAttributeDemoMainForm);
   Console.WriteLine("The Image Attribute Demo main form has been updated to show images.");


   PublishXmlRequest pxReq1 = new PublishXmlRequest { ParameterXml = String.Format(@"
   <importexportxml>
    <entities>
     <entity>{0}</entity>
    </entities>
   </importexportxml>", _customEntityName.ToLower()) };
   _serviceProxy.Execute(pxReq1);

   Console.WriteLine("The Image Attribute Demo entity was published");
  }


  public void ShowEntityFormInBrowser(bool prompt, String name, Guid id)
  {
   if (prompt)
   {
    Console.WriteLine("\nDo you want to view record '{0}' form? (y/n)", name);
    String viewFormAnswer = Console.ReadLine();
    if (viewFormAnswer.StartsWith("y") || viewFormAnswer.StartsWith("Y"))
    {
     try
     {
      String webServiceURL = _serviceProxy.EndpointSwitch.PrimaryEndpoint.AbsoluteUri;
      String entityInDefaultSolutionUrl = webServiceURL.Replace("XRMServices/2011/Organization.svc",
       String.Format("main.aspx?etn={0}&amp;pagetype=entityrecord&amp;id=%7B{1}%7D", _customEntityName.ToLower(),id.ToString()));

      ProcessStartInfo browserProcess = new ProcessStartInfo("iexplore.exe");
      browserProcess.Arguments = entityInDefaultSolutionUrl;
      Process.Start(browserProcess);

     }
     catch (SystemException)
     {
      Console.WriteLine("\nThere was a problem opening Internet Explorer.");
     }
    }
   }
  }

  /// <summary>
  /// Deletes any entity records that were created for this sample.
  /// <param name="prompt">Indicates whether to prompt the user 
  /// to delete the records created in this sample.</param>
  /// </summary>
  public void DeleteImageAttributeDemoEntity(bool prompt)
  {
   bool deleteRecords = true;

   if (prompt)
   {
    Console.WriteLine("\nDo you want to delete the entity created for this sample? (y/n) [y]: ");
    String answer = Console.ReadLine();

    deleteRecords = (answer.StartsWith("y") || answer.StartsWith("Y") || answer == String.Empty);
   }

   if (deleteRecords)
   {
    DeleteEntityRequest der = new DeleteEntityRequest() { LogicalName = _customEntityName.ToLower() };
    _serviceProxy.Execute(der);
    Console.WriteLine("The Image Attribute Demo entity has been deleted.");
   }
  }

  #endregion How To Sample Code

  #region Main method

  /// <summary>
  /// Standard Main() method used by most SDK samples.
  /// </summary>
  /// <param name="args"></param>
  static public void Main(string[] args)
  {
   try
   {
    // Obtain the target organization's Web address and client logon 
    // credentials from the user.
    ServerConnection serverConnect = new ServerConnection();
    ServerConnection.Configuration config = serverConnect.GetServerConfiguration();

    EntityImages app = new EntityImages();
    app.Run(config, true);
   }


   catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine("Timestamp: {0}", ex.Detail.Timestamp);
    Console.WriteLine("Code: {0}", ex.Detail.ErrorCode);
    Console.WriteLine("Message: {0}", ex.Detail.Message);
    Console.WriteLine("Inner Fault: {0}",
        null == ex.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
   }
   catch (System.TimeoutException ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine("Message: {0}", ex.Message);
    Console.WriteLine("Stack Trace: {0}", ex.StackTrace);
    Console.WriteLine("Inner Fault: {0}",
        null == ex.InnerException.Message ? "No Inner Fault" : ex.InnerException.Message);
   }
   catch (System.Exception ex)
   {
    Console.WriteLine("The application terminated with an error.");
    Console.WriteLine(ex.Message);

    // Display the details of the inner exception.
    if (ex.InnerException != null)
    {
     Console.WriteLine(ex.InnerException.Message);

     FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> fe = ex.InnerException
         as FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>;
     if (fe != null)
     {
      Console.WriteLine("Timestamp: {0}", fe.Detail.Timestamp);
      Console.WriteLine("Code: {0}", fe.Detail.ErrorCode);
      Console.WriteLine("Message: {0}", fe.Detail.Message);
      Console.WriteLine("Trace: {0}", fe.Detail.TraceText);
      Console.WriteLine("Inner Fault: {0}",
          null == fe.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
     }
    }
   }

   // Additional exceptions to catch: SecurityTokenValidationException, ExpiredSecurityTokenException,
   // SecurityAccessDeniedException, MessageSecurityException, and SecurityNegotiationException.

   finally
   {
    Console.WriteLine("Press <Enter> to exit.");
    Console.ReadLine();
   }
  }
  #endregion Main method
 }
}

Zie ook

Afbeeldingskenmerken
Inleiding in entiteitskenmerken in Microsoft Dynamics 365
Inleiding tot entiteiten in Microsoft Dynamics 365

Microsoft Dynamics 365

Delen via

Voorbeeld: Entiteitsafbeeldingen instellen en ophalen

Vereisten

Demonstreert

Voorbeeld

Zie ook

Aanvullende resources