Unable to satisfy constraints on package
When you make a change to the version restrictions in the metadata.rb file and execute berks install in your Chef cookbook directory, you may get the error message: Unable to satisfy constraints on package … due to solution constraint (…).…
amazon-ebs: Error waiting for SSH: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
When you launch a Linux AWS EC2 instance with Terraform or create a Linux AWS image with Packer, one of the following errors are displayed: amazon-ebs: Error waiting for SSH: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none…
Block comment in ASP.NET MVC Razor file
To comment out a block of lines in the ASP.NET MVC Razor file, enclose them in @* and *@ @* Commented out instructions, including HTML and Extension methods *@
Procedure or function ‘`…_Insert`’ cannot be found in database …
When you use the Microsoft .NET Entity framework to access a MySql database, the autogenerated code throws an error when you try to insert a row into the database with context.MY_TABLE.Add(MY_OBJECT); Server Error in ‘/’ Application.…
No connection string named ‘…’ could be found in the application config file.
Two-tier applications separate the presentation layer and the data layer, and all database access related objects are located in the data-tier. When the application runs, the config file of the main project is read. In web applications, it is the…
delimited by end-of-file (wanted `EOF’)
When you create a file in a script and use an end of file delimiter, if ... cat <<EOF> $chef_dir/attrib.json $json EOF fi and you indent the word EOF to look nicer, you will get the error message warning: here-document at line … delimited…
could not find filename for attribute .DS_Store in cookbook
The Macintosh workstation saves application states in .DS_Store files. When you edit your Chef cookbooks the MacOS leaves these files in many folders. When the Chef cookbook is executed, the Chef Client reads all files in the attributes folder and tries…
NotSupportedException: Unable to determine the provider name for provider factory of type ‘MySql.Data.MySqlClient.MySqlClientFactory’. Make sure that the ADO.NET provider is installed or registered in the application config
In a two-tier web application, the data layer is in a separate project. This allows better separation between the presentation layer and the data layer. This way you can reuse the data project in another application that targets the same database. To…
Configure the ASP.NET MVC 5 web application to use an external database for user authentication
When a new ASP.NET web application is created with the authentication set to Individual User Accounts, it automatically creates an SQL Express internal database in the App_Data directory of the application when you register the first user. To create the…
Create an ASP.NET MVC 5 Web Application with user authentication
To create a new ASP .NET MVC web application that contains user authentication code In the File menu of Visual Studio select New, Project… On the left select Visual C#, Web, and in the middle select ASP.NET Web Application (.NET Framework) Enter…