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Rapidly Develop Lohaco-Driven Apps with Active Query Builder

Leverage the Active Query Builder SQL interface builder and the ease of .NET data access to create data-driven WinForms and ASP.NET apps.

Write standard .NET to expose Lohaco data through an SQL interface: Active Query Builder helps developers write SQL interfaces; the CData ODBC Driver for Lohaco enables standards-based access to Lohaco. This integration uses the Microsoft ADO.NET Provider for ODBC as a bridge between the ODBC Driver and the Active Query Builder objects to build a visual SQL composer.

Connect to Lohaco as an ODBC Data Source

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Lohaco に接続する場合は、 SellerId、SSLClientCert、およびSSLClientCertType が必要です。

Lohaco へのアクセスの設定

SellerId、SSLClientCert、およびSSLClientCertType を取得するには、以下の手順に従ってください。

  • 「API 認証について」を参照して公開鍵と秘密鍵を生成します。
  • Lohaco ストアクリエイターにログインして、[設定]メニューの[証明書設定]に移動します。
  • [証明書を登録]をクリックして[公開鍵]、[許可IPアドレス]、[有効期限]を入力します。

Lohaco アカウントの認証

次の接続プロパティを設定して接続します。

  • SellerId:接続先のLohaco Store ID を設定。
  • SSLClientCert:プライベートキーのファイルパスを設定。
  • SSLClientCertType:値"PEMKEY_FILE" を設定。

Use SQL to Interact with Lohaco

Follow the steps below to create a WinForms visual query builder.

  1. In a new Windows Forms project, drag the QueryBuilder from the Toolbox onto the form.
  2. Add a reference to ActiveQueryBuilder.ODBCMetadataProvider.
  3. Add an OdbcConnection and set the connection string to the DSN that you created in the first section. OdbcConnection connection = new OdbcConnection(); connection.ConnectionString = "DSN=Lohaco"
  4. Initialize ODBCMetadataProvider and GeneralSyntaxProvider instances and set the Connection property of the ODBCMetadataProvider object to the OdbcConnection. GenericSyntaxProvider syntaxProvider = new GenericSyntaxProvider(); ODBCMetadataProvider metadataProvider = new ODBCMetadataProvider(); metadataProvider.Connection = connection;
  5. Set the corresponding MetadataProvider and SyntaxProvider properties of the QueryBuilder object. queryBuilder1.MetadataProvider = metadataProvider; queryBuilder1.SyntaxProvider = syntaxProvider;
  6. Call the InitiatelizeDatabaseSchemaTree method of the QueryBuilder class to retrieve Lohaco metadata and generate a tree view of Lohaco tables. queryBuilder1.InitializeDatabaseSchemaTree();
  7. After creating the QueryBuilder, connect it to a TextBox or, as we use, the ActiveQueryBuilder SQLTextEditor: Drag and drop an SQLTextEditor onto the designer.

  8. Add the following code to the Validating event for the SQLTextEditor: private void sqlTextEditor1_Validating(object sender, CancelEventArgs e) { try { // Update the query builder with manually edited query text: queryBuilder1.SQL = sqlTextEditor1.Text; } catch (SQLParsingException ex) { e.Cancel = true; // Set caret to error position sqlTextEditor1.SelectionStart = ex.ErrorPos.pos; // Report error MessageBox.Show(ex.Message, "Parsing error"); } }
  9. Add the following to the SQLUpdated event: private void queryBuilder1_SQLUpdated(object sender, EventArgs e) { sqlTextEditor1.Text = queryBuilder1.FormattedSQL; }
  10. You can now build queries visually: Double-click a table in the Columns Pane Area and an entity/relationship diagram is displayed in the Query Building Area. Columns that you select in the diagram are added to the query.

 
 
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