I have a Visual Basic application, and there are a lot of clients using it. Every XX days I make some updates to the source, and after that, I contact every client to tell them that there is a new version of the application.
But I realize that I have a few clients using an old version of the system.
Is there a way (by this I mean some kind of code, library, functions, etc.) to modify/update my master source, so that if a user is using an old version of the application, some kind of message appears after a successful log in into the system?
Message: "You are using v.1.00 and this is an old version of the
system. Try to update to the newest version, v.2.01"
Additional to the information described above, in my VB application I used some parts of VB.net code for some actions that require connections to Internet web pages.
Any suggestions/help/comments or guidance would be very helpful!
You can't do much about the customers who are already out there.
An easy way to implement this is to have your code retrieve an XML file from a website that you control. That XML file would contain the most recent version number. The code compares its version number to the version in the XML. If they're different, you display a message.
As a bonus, your XML can include a URL that points to the newest version for download.
Related
I have an odd situation on a VS upgrade from 2013 > 2015 outside of runtime.
App Type: MS Lightswitch HTML Client
DB Type: Oracle
Framework: 4.5
Story: I upgraded VS and replaced OPD.Net to the 2015 version. Works fine.
Then I converted my application. There were a lot of things to fix, but most were pretty easily remedied. I tested the application and it works as expected so I published to test server and everything checks out. Success! So I thought.
I want to continue developing the site. As I make db changes, they need to be reconciled to the intrinsic db in my project.
After clicking 'Update Database' I see this. So far so good.
What's expected is that after I hit 'Finish', all changes to the selected table should pull in to the lsml files. But this is what I get.
I've read a few places like The given key was not present in the dictionary, what key? [closed] but these all look like runtime remediations.
If I go back to the update screen and hit 'Previous', I get this.
I sifted through every freakin lsml file in text editor looking for where the provider is assigned. No luck. I also created a new proj to compare, nothing stood out. I also tried adding another data source which works fine. So ODP.net is not the issue. I am lost on what to do now. I searched all over the site, Google, for every error message with various tags. At this point I reach out to you, or anyone that may know what this is about.
Thanks ahead of time!
Note for future users upgrading a VS LS project with Oracle db.
Since a new version ODP.Net is required (in my case 2015), the provider name is going to change. To ensure LS knows the new provider, the data source lsml file needs to be updated. In my case I used GIT to help out. This is how I resolved it.
Steps:
After converting your project and replacing ODP.net to the current version.
Create a new data source using the new provider.
Save the project and re-open. This will cause lightswitch to recompile.
Open File Explorer and navigatye to the ProjectName.server folder. In a text editor (I used notepad) open the lsml files under ProjectName.server and there should be two lsml files (1 for the pre-existing and another for the new) or more if you have multiple sources.
Copy the connection properties of the new datasource to a new temp file on your desktop.
Roll back the entire solution using GIT or other source control.
Use text editor to open the lsml file for the original data source.
Update the GUID for DataProviderName with the values from the temp file in step 4.
Note: The connection string GUID should be left alone as it should match your GUID in the web.config file.
<DataService.ConnectionProperties>
<ConnectionProperty
Name="DataProviderName"
Value="9d8fdbb9-xxxx-4787-xxxx-49831d34ad4b" />
<ConnectionProperty
Name="ProviderInvariantName"
Value="Oracle.ManagedDataAccess.Client" />
<ConnectionProperty
Name="ConnectionStringGuid"
Value="36e67aca-xxxx-41a7-xxxx-a4546761b30d" />
<ConnectionProperty
Name="ProviderManifestToken"
Value="12.1" />
</DataService.ConnectionProperties>
Finally reload project and the changes should take effect allowing you to once again update your data source.
Thanks
When I debug the following code, I receive the message "System.TypeLoadException was caught" when I perform the Delete().
Using db As New ScholarshipEntities
db.ApplicationHistories.Where(Function(h) h.HistoryTypeId = 0).Delete()
db.SaveChanges()
End Using
I am using EF 6.1 in Visual Studio 2013. I also have the EntityFramework.Extended library installed.
I have no trouble querying results. I thought the bug might occur when the Where method has no results, but that is not the case. I also have no problem adding new models (.edmx), which was a problem some people with this exception had.
I just recently upgraded to EF 6.1 and installed the Extended library. This is my first time using one of the extended methods. I've un-installed and re-installed the nuget packages with no success.
IntelliTrace shows the following exceptions from the Delete() call (in order):
'EntityFramework.Reflection.DynamicProxy' does not contain a definition for 'InternalQuery'
Cannot implicitly convert type 'EntityFramework.Reflection.DynamicProxy' to 'System.Data.Entity.Core.Objects.ObjectQuery<Scholarship.ApplicationHistory>'
Could not load type 'System.Data.Entity.Core.Mapping.EntityContainerMapping'
I've added an issue on the Extended library's github.
Update
I've reinstalled EF and the EF.Extended library with no luck. I am able to use RemoveRange in its place. I am able to create a new project, install the packages, add a model mapped to the same database, and successfully use Delete. Obviously, the problem is in my current solution.
In my solution, I have an ASP.NET project and a regular library project. In the ASP project, a page's code behind calls a method in the library RemoveHistory. The library contains classes for the business logic and data access. Both classes implement interfaces. The actual Delete occurs in the data access class. My model also resides in this library project.
I may be able to create a completely new project and bring everything over, but that will take quite some time. Even if I did, I want to understand why it doesn't work in the first place, so that I don't have to repeat this process.
If you want to delete certain rows do it like that:
Using db As New ScholarshipEntities
db.ApplicationHistories.RemoveRange(db.ApplicationHistories.Where(Function(h) h.HistoryTypeId = 0))
db.SaveChanges()
End Using
If you want to remove single entity do it like that:
Using db As New ScholarshipEntities
db.ApplicationHistories.Remove(db.ApplicationHistories.Single(Function(h) h.HistoryTypeId = 0))
db.SaveChanges()
End Using
I "solved" the issue some time ago. I'll eventually go back to try and reproduce the problem to confirm my suspicions.
There were multiple versions of Entity Framework installed in the solution. This didn't appear to affect basic EF functionality, though I'm sure it did in some subtle, potentially buggy fashion.
Every time the solution was opened, NuGet would state that it couldn't complete uninstallation. Uninstalling and restoring via NuGet was unsuccessful, and the packages had to be deleted manually. Once completely removed, I installed the packages again. This resolved the issue.
I wish I could give a more technical answer, though the basic reason was forgetting to look closer at the packages folder and configuration.
Im using a web service to populate a tableview, but the data in my web database changes very rarely, and i don't need to always download the same data.
I need to storage the data in the device, and verify if the data on the device is different than the one on the web.
What is the best practice to do that? Parse a JSON object, containing the last version and comparing to the local version and then parsing the data if its needed ?
Is there a way to automate the last version?
If you have control over the web APIs then have a separate api that returns a timestamp for the last web data change and check this. If the date is not newer than the date of last download use the local data. imho.
I personally used local storage for the same situation on iOS and it worked great.
You just need to provide an URL which responds with the last version of the data (maybe a date) and then locally in JavaScript you first check if version online is newer than your local stored one, if it is you redownload data and place it into localstorage, otherwise you just keep old data (and don't download anything at all).
Of course everything must be done through Ajax.
What is the process to access data from a SQL data source and have it fill in a list box control so that the user may select one of the values?
I have been given the name of the database and server, the login ID and password.
Code samples would really be appreciated as I have never done any SQL coding.
The latest Extension Library on OpenNTF ( extlib.openntf.org ) has a whole bunch of Relational Database extensions.
You'll need to get the JDBC drivers for whatever SQL server your going to be accessing and then take a look at the ExtLib demo application on how to create the JDBC connector from your application. Once the connector is in place you can then just the new controls in ExtLib to easily create a view pane etc.
You will also need more then the SQL server, username and password, you'll need to find out the different tables that you'll be accessing so that you can reference them from your Xpages application.
I've created a video showing JDBC access from XPages: http://www.youtube.com/watch?v=p6oRCsTsVqc
Wait for the book that will e released soon about the extlib. I know Jeremy hodge wrote the chapter so you might be able to get some info from him.
From an answer I gave earlier: you might want to check out the blog post announcing the JDBC support . It has an excellent video explanation and a link to a slide deck.
Also, take a look at Xpages101 lesson 61. It's paid-for content, but well worth it if you're serious about Xpages development.
If you want to combine Upgrade Pack 1 (UP1) with the Extension Library JDBC parts, then make sure to use the Extension Library that matches exactly the UP1 version. This is version 853-20111215 of the Extension Library. Then you can use the update site method to only deploy the experimental parts of the Extension Library (com.ibm.xsp.extlibx.feature_8.5.3.20111215-0914.jar).
For newer releases of Extension Library things might (will) have changed so that UP1 and Extension Library can not work together.
When UP2 is released, you need to remove the Extension Library package and deploy UP2. At that point in time UP2 might contain the JDBC support.
Roy,
As the previous posters put the ext library stuff will make it a little more "Drag and Drop", but you can use regular JDBC connection to get the data you want, Its pretty simple, but a lot more code than using Domino as a backend. You might want to look at this John Mackey blog post about doing a very similar thing...http://www.jmackey.net/groupwareinc/johnblog/johnblog.nsf/d6plinks/GROC-7G9GT4
Keep in mind that you need the actual ext. library for this. The upgrade pack does not contain the JDBC stuff.
Edit:
Keep in mind that if you don't need "LIVE" data access, and the information you want is fairly static you could always just use a lotusscript agent to pull the data down into Notes Documents. Run that once a day or whatever. No fancy XPages stuff needed. That's fairly common coding and practices with examples available.
Then just have the list box pull from the documents you brought down.
I have made a ContentType in Visual Studio 2010 for my SharePoint 2010 project and the first time I deployed the wsp through the WSPBuilder there were no troubles but now every time I try to deploy, it keeps saying that it can't activate features because "The field with ID {insert random guid here} defined in feature {60938308-3563-497c-bc55-b2ae847ca8b8} (the feature activating my contenttype on the site) was found in a current site collection or in a subsite."
The contenttype and site columns gets created on the rootweb and even though I try to either deactivate the feature or completely uninstall it, the site columns and contenttype won't be deleted from the ContentType gallery or Site Columns gallery.
How can this be?
I use pure feature and XML functionality. No eventreceivers are involved.
SharePoint will not let you delete site columns and content types that are in use. This makes the upgrade process a little tricky.
If you just want to add a field to your content type you can use the Feature upgrade facilities in SharePoint 2010. This blog post series should help you: http://www.sharepointnutsandbolts.com/2010/06/feature-upgrade-part-1-fundamentals.html
If you need to make any other changes (remove field, change type, etc) then you need to take a different approach. You'll create a new content type that inherits from, and eventually replaces, your existing content type. This strategy is discussed here: http://msdn.microsoft.com/en-us/library/aa543504.aspx
Besides checking out what Rob suggests:
Did you install Visual Studio SP1?
I received that error before installing SP1 and the workaround was closing all Visual Studio instances and starting it up again. After starting up deployment was possible again.