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Greg-DB
Dropbox Community Moderator
9 years ago
We can't seem to reproduce that error. Did you follow the instructions for setting it up? (Also, I reccomended trying the SimpleBlogDemo, but it looks like you're trying to run the SimpleBusinessDashboard sample.) If you can share steps to reproduce it, that would be helpful.

In any case, looking online, there seem to be several things that can cause this. Can you take a look at those?
knightd23
Explorer | Level 3
9 years ago
Hello,
Thanks for the answer.
I leave then the steps that I follow:
-Open the project the Dropbox.api with Visual Studio;
-Right click in SimpleBlogDemo -> Set as Startup Project
-Open Web.config file and add the APPKEY and APPSECRET to lines 21 and 22 respectively.
-Add in MY APPS Dropbox the http://localhost:5000/Home/Auth in the Redirect URIs of the OAuth2
- Save and press Start button

Sometimes gives the error that I described other times open a tab in the browser and after a while time said that is impossible to access to the website.

Best Regards
Greg-DB
Dropbox Community Moderator
9 years ago
Thanks! We have managed to reproduce this. It seems the different sample projects can conflict with each other in some cases.

Please try the following to resolve it:
- right click on the SimpleBlogDemo project
- click "Properties"
- click "Web" in the sidebar
- change the port in "Project Url", e.g., from http://localhost:5000/ to http://localhost:5001/
- say yes the resulting pop-up, if you get one
- run the project again
knightd23
Explorer | Level 3
9 years ago
Hello,

With your configurations the page opens, request a login register and after I give the permissions to my app allows the access to the simpleblogdemo, the request the error "Server Error in '/' Application." reappears.

Best Regards
Greg-DB
Dropbox Community Moderator
9 years ago
I'm glad to hear that fixed that issue.

Can you share the backend error you're getting for this new problem? Thanks in advance!
Greg-DB
Dropbox Community Moderator
9 years ago
Also, make sure to update the redirect URI to match the new port.

We've now updated the repo in Github to have the two projects point to different ports now to avoid this in the future. Pulling the latest code should fix everything. If not (maybe due to cached files), Properties -> Web -> Create Virtual Directory should fix it.

knightd23

Explorer | Level 3

9 years ago

Hello,

Thanks for the answer.

The error gives after I run the program and run the follow steps:

-Appear a web page when I run, that tells to signup now, I press that key

-Next ask to write my email account and password, I wrote;

-In the end has a button which name is "connected", I press this and gives the following error.

Server Error in '/' Application.

The value can't be null.
Parameter name: clientId

Description: Unhandled exception when running the current Web request. Please review the stack trace for more information about the error and the appropriate originated in the code.

Exception Details: System.ArgumentNullException: Value can not be null.
Parameter name: clientId

Source error:

Line 207:            if (string.IsNullOrWhiteSpace(clientId))
Line 208:            {
Line 209:                throw new ArgumentNullException("clientId");Line 210:            }
Linha 211:

Source File: ......\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs Line: 209

Stack Trace:

[ArgumentNullException: O valor não pode ser nulo.
Nome do parâmetro: clientId]
   Dropbox.Api.DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType oauthResponseType, String clientId, Uri redirectUri, String state, Boolean forceReapprove, Boolean disableSignup) in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs:209
   Dropbox.Api.DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType oauthResponseType, String clientId, String redirectUri, String state, Boolean forceReapprove, Boolean disableSignup) in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Dropbox.Api\DropboxOauth2Helper.cs:181
   SimpleBlogDemo.Controllers.HomeController.Connect() in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Controllers\HomeController.cs:176
   lambda_method(Closure , ControllerBase , Object[] ) +61
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +166
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Greg-DB
Dropbox Community Moderator
9 years ago
Thanks! That error indicates that the app key is missing. Make sure you filled in the DropboxAppKey and DropboxAppSecret values in Web.config for that sample app.

knightd23

Explorer | Level 3

9 years ago

Hello,

Thanks for the anser.

I really forget to add the APPkey and Secret, that's because I download the last version and not added these values.

I having test the example now and it works good, however after I add files to my blog and if I delete these files in my dropbox, when i'm going to disconnect in the app gives the following error. I'm saying this because can be a problem to someone that need to do this, for me this isn't a problem.

Server Error in '/' Application.

The collection was modified; Enumeration operation may not be performed.

Description: Eception unhandled when running the current Web request. Please review the stack trace for more information about the error and the appropriate source in the code.
Exception Details: System.InvalidOperationException: The collection was modified; enumeration operation may not be performed.

Source error:

Line 82:                            select k;
Line 83: 
Line 84:                 foreach (var key in keys)Line 85:                 {
Line 86:                     ArticleCache.Remove(key);

Source File: .....\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Helpers\BlogHelpers.cs Line: 84

Stack Trace:

[InvalidOperationException: The collection was modified; The enumeration operation may be not performed.]
   System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource) +52
   System.Collections.Generic.Enumerator.MoveNext() +12384225
   System.Linq.WhereEnumerableIterator`1.MoveNext() +32
   SimpleBlogDemo.Helpers.BlogHelpers.FlushCache(ControllerBase controller, String blogName) in ....\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Helpers\BlogHelpers.cs:84
   SimpleBlogDemo.Controllers.<DisconnectAsync>d__10.MoveNext() in C:\Users\tsf\Documents\dropbox-sdk-dotnet-master\Examples\SimpleBlogDemo\Controllers\HomeController.cs:154
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +92
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +58
   System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult) +97
   System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeAsynchronousActionMethod>b__36(IAsyncResult asyncResult) +17
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +48
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9765121
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

knightd23
Explorer | Level 3
9 years ago

Hello,

You are right, I forgot to add the APPKEY and Secret in the xml file, because I think I was working with a old folder, however I was working with the new folder that you upload.

Other question, when I run the SimpleTest application gives the following error after ask to reset the settings. How can I solve? I already have looking for the URL configuration and I not found.

Best Regards

Dropbox - 400
Error (400)It seems the app you were using submitted a bad request. If you would like to report this error to the app's developer, include the information below.

More details for developers
Invalid redirect_uri: "https://localhost/authorize": It must exactly match one of the redirect URIs you've pre-configured for your app (including the path).
Greg-DB
Dropbox Community Moderator
9 years ago
For that sample, you should add "https://localhost/authorize" as a redirect URI for your app on the App Console:

https://www.dropbox.com/developers/apps
knightd23
Explorer | Level 3
9 years ago
Hello,
Thanks for the help and sorry for the basics questions. It's all works.

Best Regards

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