Try to run the previous fragment of code on several operating systems virtual machines are a great help for thisand you will see how Xojo points to the right path in every case.įor that we can use the method of the class instance Child. For example, if we want to get the right reference to the Documents folder on every supported deployment OS, we would have to use this fragment of code. This is the way to go, for example, when we want to point to the Documents folder or other specific folders such as Library or Cache. For these cases Xojo offers the GetOpenFolderItem function, passing along as a unique parameter the string representing, as a filter, the kind of files our app is interested in. I mean, this is what happens, for example, when using most of the apps that allows us to choose the file via a File Dialog Box a Window that brings access to the OS file system showing all the files that are compatibles with the app. This way we avoid the use of multiple if…then…else in the same code fragment. Or, preferably, catching the exceptions as in the following example. For these cases, you can turn to the use of the conditional compilation clause If… Then… Endifproviding the native path variation expected by the OS under which your app is running. It is important to point out the fact that the path format, as Stringis the native one to the platform over which we are going to deploy the app, something you have to consider if you want to create a multiplatform app. With the previous line of code we will be using the FolderItem class Constructorpassing along as the argument the native path to the file we want to get the reference to, if it already exists or to the file our app expects to create. This method connects to the sample database and adds all the names in the employee table to a ListBox.In both scenarios, the most basic way to go is the same. The code to do this is similar to most Xojo database code. If so, you are now ready to connect using Xojo. Modele tricotate manual explicate caciuli
If you did not already install the ODBC drivers from above, you will need to do so now.
You can find updated drivers not free, but they have a day trialincluding ones for Mac from devart. Once you download and install Firebird which should only take about a minute on Windows 10 using the default settingsyou can then get the ODBC drivers, which have to be downloaded separately.
This shows you how to use both using Firebird running on Windows. Applicazione reddito di cittadinanza saldoįirebird can be used two ways, as a database server or as an embedded database. Firebird is a completely free cost and licensecross-platform database with some interesting features. Many database vendors make ODBC drivers available for free. This example uses the existing TestDSN to connect to the database. Alternatively, you can provide a DSN name and supply credentials. This code supplies a blank DataSource property, which prompts the user for the DSN using the system dialog. Consulting the docs for your Linux distribution. On Linux, you may have to edit configuration files.
In this tool you install the ODBC driver and enter the necessary credentials to connect to the database. How you connect to an ODBC database depends on the database you are using. ODBC can be a great way to connect to databases that do not have a built-in Xojo database class, such as.
ODBC drivers are available for almost any database.