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swdev:howto:create_database_using_firebird [2010/10/20 10:04] smayr |
swdev:howto:create_database_using_firebird [2011/02/25 16:17] (current) smayr [Run an embedded SQL Script against Firebird] |
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=== Datalog table === | === Datalog table === | ||
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</ | </ | ||
+ | |||
+ | |||
+ | === StylePhotos table === | ||
+ | |||
+ | Supports the following features: | ||
+ | * Image data BLOB. | ||
+ | |||
+ | <code sql> | ||
+ | / | ||
+ | /* | ||
+ | / | ||
+ | SET NAMES none; | ||
+ | |||
+ | / | ||
+ | /* | ||
+ | / | ||
+ | CREATE TABLE stylephotos ( | ||
+ | style | ||
+ | stylephoto | ||
+ | ); | ||
+ | |||
+ | / | ||
+ | /* | ||
+ | / | ||
+ | </ | ||
+ | |||
+ | == Creating Database Programmatically (C#) == | ||
+ | Source: [[http:// | ||
+ | |||
+ | === Run an embedded SQL Script against Firebird === | ||
+ | I had an idea that it would be great if my application could automatically create any database that it required. | ||
+ | |||
+ | I have in the past attempted to hardcode database construction routines but dislike this approach as it makes the code messy and difficult to maintain. Instead, I favoured the idea of executing a script containing my SQL statements which could be used to construct the database. The application would just simply execute the script, an approach I’ve used in the past with SQL Sever. | ||
+ | |||
+ | Whilst investigating further, I found these useful links: | ||
+ | |||
+ | * [[http:// | ||
+ | * [[http:// | ||
+ | |||
+ | However, distributing a separate script file would allow a user to change or view the contents of the file. | ||
+ | |||
+ | Having experimented with embedded resource files, I thought a similar approach would protect the script from abuse by the average user and only venerable to experienced programmers. | ||
+ | |||
+ | I tested various routines and arrived at the following working example: | ||
+ | <code csharp> | ||
+ | void ButtonRunScriptClick(object sender, System.EventArgs e) | ||
+ | { | ||
+ | //specify the database name | ||
+ | string dbName = " | ||
+ | // | ||
+ | FbConnectionStringBuilder csb = new FbConnectionStringBuilder(); | ||
+ | csb.Database = dbName; | ||
+ | csb.UserID = " | ||
+ | csb.Password = " | ||
+ | csb.ServerType = 1; // | ||
+ | // | ||
+ | FbConnection con = new FbConnection(csb.ToString()); | ||
+ | //check if the database exists | ||
+ | if (System.IO.File.Exists(dbName) == false) | ||
+ | //create the database as it didn’t exist | ||
+ | FbConnection.CreateDatabase(csb.ToString()); | ||
+ | //run the script against the current connection | ||
+ | RunScript(" | ||
+ | } | ||
+ | |||
+ | void RunScript(string ScriptName, FbConnection connection) | ||
+ | { | ||
+ | //get a reference to the executing assembly | ||
+ | System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly(); | ||
+ | // | ||
+ | System.IO.TextReader textReader = new System.IO.StreamReader(assembly.GetManifestResourceStream(ScriptName)); | ||
+ | FbScript script = new FbScript(textReader); | ||
+ | //parse the script | ||
+ | script.Parse(); | ||
+ | //open the connection | ||
+ | connection.Open(); | ||
+ | FbBatchExecution fbe = new FbBatchExecution(connection); | ||
+ | foreach (string cmd in script.Results) | ||
+ | { | ||
+ | //add each sql statement to the batch | ||
+ | fbe.SqlStatements.Add(cmd); | ||
+ | } | ||
+ | //execute the batch | ||
+ | fbe.Execute(); | ||
+ | //close the connection | ||
+ | connection.Close(); | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | To test the above code, you will need to do the following: | ||
+ | # Download and install the ' | ||
+ | # Once installed, create a new Windows Application and add a reference to your project for the FirebirdSql.Data.Firebird assebly loaded in the GAC. | ||
+ | # Copy & Paste the sample code into your project. | ||
+ | # Add the following Using Directives: <code csharp> | ||
+ | using FirebirdSql.Data.Firebird; | ||
+ | using FirebirdSql.Data.Firebird.Isql;</ | ||
+ | # Download ' | ||
+ | # Create a text file named ' | ||
+ | CREATE TABLE CLIENTS ( | ||
+ | client_id integer not null, | ||
+ | firstname char(20), | ||
+ | lastname char(20), | ||
+ | PRIMARY KEY (client_id)); | ||
+ | # Add the file you created in Step 4 to your project and set the build action to Embedded Resource. | ||
+ | # Add a button to your form named buttonRunScript and check that its Click Event is set to the ButtonRunScriptClick Event Handler. | ||
+ | |||
+ | Hopefully, when you build the project and click the Run Script button, a file will be created in the applications directory named '' | ||
+ | |||
+ | Providing there were no errors during the applications execution the database should have been constructed according to the statements in the SQL script. | ||
+ | |||
+ | There are several Database Admin Tools you can use to inspect/ |