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Provide a Custom Database Schema

After you registered connection strings, you can specify tables, views and stored procedures to include in a database schema and display in the SQL Data Source Wizard.

  1. Implement the IDBSchemaProviderEx interface to create a custom database schema provider (named MyDBSchemaProvider) as shown below.

    using DevExpress.DataAccess.Sql;
    using DevExpress.Xpo.DB;
    using System.Linq;
    // ...
    
    public class MyDBSchemaProvider : IDBSchemaProviderEx {
        DBSchemaProviderEx provider;
        public MyDBSchemaProvider() {
            this.provider = new DBSchemaProviderEx();
        }
    
        public DBTable[] GetTables(SqlDataConnection connection, params string[] tableList) {
            return provider.GetTables(connection, tableList)
                .Where(table => table.Name.StartsWith("C"))
                .ToArray();
        }
    
        public DBTable[] GetViews(SqlDataConnection connection, params string[] viewList) {
            return provider.GetViews(connection, viewList)
                .Where(view => view.Name.StartsWith("Order"))
                .ToArray();
        }
    
        public DBStoredProcedure[] GetProcedures(SqlDataConnection connection, params string[] procedureList) {
            return provider.GetProcedures(connection, procedureList)
                .Where(storedProcedure => storedProcedure.Arguments.Count == 0)
                .ToArray();
        }
    
        public void LoadColumns(SqlDataConnection connection, params DBTable[] tables) {
            provider.LoadColumns(connection, tables);
        }
    }
    
  2. Create a custom database schema provider factory (named MyDataSourceWizardDBSchemaProviderFactory). Implement the IDataSourceWizardDBSchemaProviderExFactory interface and create a new custom data store schema provider (MyDBSchemaProvider) in the IDataSourceWizardDBSchemaProviderExFactory.Create method.

    using DevExpress.DataAccess.Sql;
    using DevExpress.DataAccess.Web;
    // ...
    
    public class MyDataSourceWizardDBSchemaProviderFactory : IDataSourceWizardDBSchemaProviderExFactory {
        public IDBSchemaProviderEx Create() {
            return new MyDBSchemaProvider();
        }
    }
    
  3. Call the static DefaultReportDesignerContainer.RegisterDataSourceWizardDBSchemaProviderExFactory<T> method at the application's startup to register the custom database schema provider factory.

    using DevExpress.DataAccess.Web;
    using System;
    using DevExpress.XtraReports.Web.ReportDesigner
    // ...
    
    public class Global_asax : System.Web.HttpApplication {
        void Application_Start(object sender, EventArgs e) {
            // ...                          
            // Register a connection strings provider.
            // ...
            // Register the custom provider factory.
            DefaultReportDesignerContainer.RegisterDataSourceWizardDBSchemaProviderExFactory<MyDataSourceWizardDBSchemaProviderFactory>();
        }
        // ...
    }
    
See Also