The component is meant to be a helper—you need only one component instead of four which must also be connected. In this respect, the predefined connections are very different from the BDE aliases. I do not believe this will affect your decision-making process, but I thought I should bring it to your attention, just in case it does matter. When you add a new SQLConnection component to an application, you can proceed in different ways. For a table or stored procedure, the CommandText property indicates the name of the related database element, and the editor provides a drop-down list containing the possible values. In fact, when you select a driver or a connection at design time, the values of these files are copied to corresponding properties of the SQLConnection component, as in this example:. The connection component uses the information available in the drivers.
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Technically, some of the moving operations call the CheckBiDirectional internal function and eventually raise an exception.
In addition to this issue, the component has other limitations, including difficulty manipulating the dataset fields of the data access dataset which is important for setting key fields and can affect the way updates are generated and unavailability of some provider events. Summary of what happened: Selphi will try to reinstall the Oracle client tomorrow. You must reselect the connection to which these other components refer.
This comprehensive guide will present you with a variety of self-publishing options and explore their viability. Once LibraryName and VendorLib have been set, your application does not need to rely on dbxdrivers. Each connection relates to the driver for its key attributes, as indicated by the DriverName property. The delpni describes the physical database you want to connect to. In that case, DriverName and Params will likely differ on the system where you deploy your application from the values you use during development.
Connect dbexpress to Oracle 10g XE – Devart Forums
You can delpphi between the two connection descriptions easily by using two versions of the dbxconnections. However, since this operation copies the connection data, notice that updating the connection doesn’t automatically refresh the values within other SQLConnection components referring to the same named connection: XE” In all cases I received the same Windows socket error ‘requested address is not valid Because Params is a string list, at design time, you can double-click the Params property in the Object Inspector to edit the parameters eqlconnection the String List editor.
Does this new exception tell you anything?
In this case, sqlconnectoin change in the predefined connections will be reloaded when you open the connection, at either design time or run time. This page was last modified on 21 Novemberat The Params property is a string list that lists name-value pairs. CheckBiDirectional refers to the public IsUnidirectional property of the TDataSet class, which you can eventually use in your own code to disable operations that are illegal on unidirectional datasets.
I have no idea what zqlconnection is about.
Delphi + MySQL + SQLConnection
Devart Forums Discussion forums for open issues and questions concerning database tools, data access components and developer tools from Devart Skip to content. You can create or modify these associations using the Connection Editor. What really matters for the SQLConnection component is the value of its properties. However, because this operation copies the connection data, updating the connection doesn’t automatically refresh the values within other SQLConnection components referring to the same named connection: The SimpleDataSet component is new in Delphi 7.
Create nil ; SQLConnection.
The important thing to notice is that these initialization files are used only at design time. This list associates settings with a name, and you can enter multiple connection details for every database driver.
When you create a new connection, the system will copy the default parameters from the driver; you can then edit them for the specific connection—for example, providing a proper database name. I do not believe this will delphl your decision-making process, but I thought I should bring it to your attention, just in case it does matter.
sql server – Delphi SQLConnection via ODBC on Linux cannot connect to SQL – Stack Overflow
It is a combination of four existing components: These databases use Dynalink drivers, which are partially written in Delphi. In addition to the usual Username, Password, and Database, it also requires a ‘Connect as’ parameter.
Its value depends on the server you are using. This is a string list including information such as the database name, the user name and password, and so on. You can name dbExpress database and parameter combinations, which are then saved in a file called dbxconnections. When you create a new connection, the system will copy the default parameters from the driver; you can then edit them for the specific connection—for example, providing a proper database name.