topic Re: ArcMap.Application is null when Addin is loaded in ArcObjects SDK Questions

ArcMap.Application is null when Addin is loaded

SiqinWANG — Thu, 19 Jun 2014 07:21:55 GMT

Hello,

I've a problem in the installation of an Add-in that we've developed for our client. The Add-in does not work correctly because the ArcMap.Application value is null when loaded. The type of this Add-in is an Extension.

The Add-In is developed with ArcObjects in the version of 10.2.1. We don't have any problem when it is tested on our environment with an ArcMap 10.2.1. Our client has a version of 10.2.0.

Does any one has an idea of this error ?

Thank you very much.

Siqin

Re: ArcMap.Application is null when Addin is loaded

DuncanHornby — Thu, 19 Jun 2014 13:23:17 GMT

Can't really help unless we see the code.

I suggest you upload a sample of code where this null is being returned.

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Sun, 12 Dec 2021 04:25:17 GMT

Can't really help unless we see the code.

I suggest you upload a sample of code where this null is being returned.

Hello Hornbydd,

Thank you for your message.

Here is the code :

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Reflection;
using System.Windows.Forms;

namespace TestChargementAddIn {
    public class ExtensionChargement : ESRI.ArcGIS.Desktop.AddIns.Extension {
        public ExtensionChargement() {
        }

        protected override void OnStartup() {
            //
            // TODO: Uncomment to start listening to document events
            //
            // WireDocumentEvents();

            
            if (ArcMap.Application == null) {
                // relative path est par rapport au répertoire de Debug ou Release

               MessageBox.Show("Erreur : ArcMap.Application est nul !!");
            } else {
                MessageBox.Show("OK: L'AddIn est chargé normalement. ArcMap.Application : " + ArcMap.Application.Caption.ToString());
                if (ArcMap.Document == null) {
                    MessageBox.Show("Erreur : ArcMap.Document est nul !!");
                } else {
                    MessageBox.Show("OK : ArcMap.Document non nul");
                }
            }
        }

        private void WireDocumentEvents() {
            //
            // TODO: Sample document event wiring code. Change as needed
            //

            // Named event handler
            ArcMap.Events.NewDocument += delegate() { ArcMap_NewDocument(); };

            // Anonymous event handler
            ArcMap.Events.BeforeCloseDocument += delegate() {
                // Return true to stop document from closing
                ESRI.ArcGIS.Framework.IMessageDialog msgBox = new ESRI.ArcGIS.Framework.MessageDialogClass();
                return msgBox.DoModal("BeforeCloseDocument Event", "Abort closing?", "Yes", "No", ArcMap.Application.hWnd);
            };

        }

        void ArcMap_NewDocument() {
            // TODO: Handle new document event
        }

    }

}

I've also uploaded the packaged Add-In in the post in order that you could test it.

Thanks.

Siqin

Re: ArcMap.Application is null when Addin is loaded

DuncanHornby — Fri, 20 Jun 2014 08:38:00 GMT

OK here is an idea, go to the the Config.esriaddinx file in Visual Studio and set the autoLoad to equal "true" for your <Extension>.

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Sun, 12 Dec 2021 04:25:20 GMT

OK here is an idea, go to the the Config.esriaddinx file in Visual Studio and set the autoLoad to equal "true" for your <Extension>.

Hornbydd,

Thank you for your reply. I've checked in my Config.esriaddinx file. The value of the "autoLoad" option is already set to "true".
Is there something else can be wrong in the configuration ? Or some configuration to change on ArcMap ?

Thanks.

<ESRI.Configuration xmlns="http://schemas.esri.com/Desktop/AddIns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Name>TestChargementAddIn</Name>
  <AddInID>{b60275b3-d9ad-48fe-90ad-d7f43adfbb6c}</AddInID>
  <Description>C'est un test sur le chargement d'un AddIn.</Description>
  <Version>1.0</Version>
  <Image>Images\TestChargementAddIn.png</Image>
  <Author>siwang</Author>
  <Company>Kleegroup</Company>
  <Date>18/06/2014</Date>
  <Targets>
    <Target name="Desktop" version="10.2" />
  </Targets>
  <AddIn language="CLR4.5" library="TestChargementAddIn.dll" namespace="TestChargementAddIn">
    <ArcMap>
      <Extensions>
        <Extension id="Kleegroup_TestChargementAddIn_ExtensionChargement" class="ExtensionChargement" productName="Extension du Chargement" showInExtensionDialog="true" autoLoad="true">
          <Description>Test sur l'extension</Description>
        </Extension>
      </Extensions>
    </ArcMap>
  </AddIn>
</ESRI.Configuration>

Re: ArcMap.Application is null when Addin is loaded

NeilClemmons — Fri, 20 Jun 2014 12:29:21 GMT

You said you compiled the addin in 10.2.1 and are trying to run it on 10.2.0. I don't know about addins but that doesn't typically work for standard COM extensions since ArcObjects are not backwards compatible.

Re: ArcMap.Application is null when Addin is loaded

DuncanHornby — Fri, 20 Jun 2014 12:30:16 GMT

I've always understood development with ArcObjects should use be using the 3.5 .Net Framework, I see you have yours set to 4.5. You can change this under project properties > Compile > Advanced Compile Options.

Also make sure platform Target CPU is x86.

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Fri, 20 Jun 2014 13:07:08 GMT

You said you compiled the addin in 10.2.1 and are trying to run it on 10.2.0. I don't know about addins but that doesn't typically work for standard COM extensions since ArcObjects are not backwards compatible.

Thank you for this important information. Effectively, we have also a doubt on the compatibility.
Our client finally agrees to update their application to the version of 10.2.1. However, we have to assure that there is nothing else which could go wrong beside the version problem.

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Fri, 20 Jun 2014 13:13:59 GMT

I've always understood development with ArcObjects should use be using the 3.5 .Net Framework, I see you have yours set to 4.5. You can change this under project properties > Compile > Advanced Compile Options.

Also make sure platform Target CPU is x86.

That's something that we've not thought of !! Maybe the machines of our client don't have the 4.5 version of .Net Framework. I'll verify that. As the Add-in is developed with the 4.5 .Net Framework, we have to check if there is some incompatibility problems in the code.

Thank you for your advice !

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Fri, 20 Jun 2014 14:58:54 GMT

Thank you for this important information. Effectively, we have also a doubt on the compatibility.
Our client finally agrees to update their application to the version of 10.2.1. However, we have to assure that there is nothing else which could go wrong beside the version problem.

Hornbydd,

We've checked the version of client's machine : They don't have the 4.5 version of .Net. Only on 4.0. I've sent them an Add-In of thest compiled on 4.0. They have succeeded in loading it. So the problem comes exactly from the installed .net version.

Thank you very much for your help 🙂

Re: ArcMap.Application is null when Addin is loaded

SiqinWANG — Sun, 12 Dec 2021 04:25:23 GMT

The target platform is certainly good advice. and make sure the machine has the 4.5 .Net Framework.

Also, in your config.esriaddinx file have you tried to change the target version? Just a thought - not sure if that would affect the compatibility ability to compile.
<Targets>
    <Target name="Desktop" version="10.2" />
  </Targets>
  <AddIn language="CLR4.5" library="Tools.dll" namespace="Tools">
    <ArcMap>
Have you been able to test the same add-in on a machine with the 10.2.0 version?

Thanks,
Sol

Sol,

thank you for your reply. It is the .Net version problem. Add-In compiled with 4.0 .Net works for the 10.2.0 version.

Siqin