Access-database.rar_LABVIEWACCESS_access

共55个文件

vi：47个

mnu：3个

mdb：2个

版权申诉

access

labsql

36 浏览量 2022-09-14 22:14:08 上传评论收藏 2.23MB RAR 举报

在IT领域，数据库访问是应用程序开发中的重要环节，特别是在数据密集型的应用中。LabVIEW（Laboratory Virtual Instrument Engineering Workbench）是由美国国家仪器公司（NI）开发的一种图形化编程环境，广泛应用于测试、测量和控制系统。本压缩包“Access-database.rar_LABVIEW ACCESS_access_labsql”显然聚焦于LabVIEW如何与Microsoft Access数据库进行交互。我们来详细了解一下LabVIEW。LabVIEW是一种基于G图形编程语言（G是LabVIEW特有的编程语法）的平台，用户可以通过拖拽和连接图标来创建程序，使得编程过程更加直观。由于其可视化的特点，LabVIEW尤其适合进行快速原型开发和系统集成，尤其是在工程和科研领域。在LabVIEW中，访问数据库通常涉及以下几个核心概念： 1. **数据库驱动**：LabVIEW支持ODBC（Open Database Connectivity）和OLE DB，这两种是常见的数据库访问接口。通过安装对应的数据库驱动，LabVIEW可以与各种数据库系统通信，包括Microsoft Access。 2. **数据库连接**：在LabVIEW中，你可以使用“数据库连接”函数来建立到Access数据库的连接。这需要提供正确的数据库路径、用户名和密码等信息。 3. **LabSQL库**：提及“LabSQL”，这是LabVIEW的一个第三方工具，它为LabVIEW提供了更高级别的SQL操作支持。LabSQL简化了编写和执行SQL查询的过程，使开发者能够更方便地处理数据库操作，如创建、读取、更新和删除（CRUD）记录。 4. **数据库操作**：在LabVIEW中，你可以使用一系列函数来执行数据库操作，如打开表、执行查询、插入记录、更新记录和关闭连接。LabSQL库可能包含预定义的VI（虚拟仪器），用于这些常见任务，提高了开发效率。 5. **数据可视化**：LabVIEW的优势之一是其强大的数据可视化能力。一旦从数据库获取数据，你可以创建各种图表、仪表盘或数据显示控件来实时显示和分析数据。 6. **错误处理**：在任何数据库操作中，错误处理都是必不可少的部分。LabVIEW提供了丰富的错误处理结构，帮助开发者捕获和处理可能出现的问题，确保程序的稳定性和可靠性。 7. **数据缓存**：在处理大量数据时，可能需要将数据缓存在内存中以提高性能。LabVIEW可以实现这一点，通过数组和簇等数据结构来存储和管理数据。 8. **安全性与权限**：在实际应用中，数据库的安全性是至关重要的。LabVIEW允许你控制对数据库的访问权限，确保只有授权的用户和程序能进行数据操作。 9. **性能优化**：通过批处理和事务处理，LabVIEW可以帮助优化数据库操作的性能，尤其是当需要处理大量数据时。 10. **数据库设计**：虽然LabVIEW主要关注编程，但理解Access数据库的设计原理也至关重要。这包括表格设计、关系模型、索引和查询优化等。 “Access-database.rar_LABVIEW ACCESS_access_labsql”这个压缩包提供了一个LabVIEW程序，用于演示如何利用LabSQL库与Access数据库进行交互。这将对学习LabVIEW编程以及数据库访问技术的开发者大有裨益，有助于他们在实践中掌握这些关键技能。通过这个示例，你可以学习到如何在LabVIEW环境中构建高效、可靠的数据库应用程序，从而在工程和科研项目中实现数据的有效管理和分析。

资源推荐

资源详情

资源评论

收起资源包目录

Access-database.rar （55个子文件）

访问数据库

LabSQL-1.1a.zip 1.1MB

MyDB.mdb 196KB

Recordset中单条记录读出.vi 22KB

SQL查询举例.vi 17KB

SQL修改记录举例.vi 16KB

SQL添加记录举例.vi 16KB

LabSQL For LabVIEW8.20

ADO210.CHM 752KB

Examples

Example- One Record at a Time.vi 22KB

Example - Insert into a Table.vi 18KB

SampleDatabase.mdb 128KB

Example - Fetch a Table.vi 17KB

LabSQL ADO functions

SQL Fetch Data.vi 73KB

SQL Fetch Data (GetString).vi 28KB

Recordset

ADO Fields Item.vi 27KB

ADO Recordset Destroy.vi 15KB

ADO Recordset RecordCount.vi 25KB

ADO Recordset EOF.vi 17KB

ADO Recordset MoveNext.vi 24KB

ADO Recordset Move.vi 26KB

ADO Fields Get Count.vi 25KB

ADO Recordset Get Fields.vi 25KB

ADO Recordset GetString.vi 26KB

ADO Recordset BOF.vi 25KB

ADO Recordset Close.vi 24KB

dir.mnu 3KB

ADO Recordset MoveFirst.vi 24KB

ADO Item Value.vi 27KB

ADO Recordset Create.vi 23KB

ADO Recordset Open.vi 34KB

ADO Recordset Cache Size.vi 25KB

ADO Recordset MoveLast.vi 24KB

SQL Execute.vi 30KB

Command

ADO Command Execute.vi 27KB

ADO Command Set Stored Procedure Text.vi 31KB

ADO Command Get Integer Parameter Value.vi 32KB

ADO Command Set String Parameter Value.vi 29KB

ADO Command Create.vi 23KB

dir.mnu 3KB

ADO Command Destroy.vi 20KB

ADO Command Set Paramter Value.vi 29KB

ADO Command Set Active Connection.vi 25KB

ADO Command Set Command Text.vi 30KB

ADO Command Get Parameters.vi 25KB

Connection

ADO Connection Destroy.vi 22KB

ADO Connection Rollback Transaction.vi 23KB

ADO Connection Close.vi 16KB

ADO Connection Set Mode.vi 25KB

ADO Connection Open.vi 19KB

ADO Connection Set Timeout.vi 25KB

ADO Connection Create.vi 16KB

dir.mnu 3KB

ADO Connection Commit Transaction.vi 23KB

ADO Connection Begin Transaction.vi 25KB

ADO Connection Execute.vi 19KB

README_FIRST.txt 4KB

LabSQL release 1.1a (c) 2002 Jeffrey Travis (Jeffrey Travis Studios) Version 1.1a - Nov 17 2002 - some VIs in version 1.1 were indavertently saved under LabVIEW 6.1. In order to preserve compatibility with LabVIEW 6.0, all LabSQL VIs are now 6.0-compatible. Version 1.1 - Sep. 2002- fixes a rare bug where text with special characters like tabs (\t) that were part of a database record could produce buggy behavior. 0. INTRODUCTION ---------------- LabSQL is the beginning of an open source project to provide free, multi-database, multi-platform database connectivity support for LabVIEW. In this first release, we have used the Microsoft ADO object to provide connectivity in LabVIEW for Windows for any ODBC-compliant database, including Access, SQL Server, Oracle, Pervasive, Sybase, etc. Future versions may include JDBC suport for DB connectivity on other LabVIEW platforms, but there are no immediate plans to add this. Using LabSQL assumes you have at least a basic knowledge of SQL commands and database terminology such as tables, rows, fields, DSN. It also will help for you to familiarize yourself well with the ADO methods and properties. You can peruse the ADO help file included with this release, or visit http://www.microsoft.com/ado A trivial sample Access database and 3 examples are included with this LabSQL utility. 1. INSTALLATION --------------- 1a. System Requirements: ----------------------- Because this version of LabSQL relies on an ActiveX component (ADO), it will only run on LabVIEW for Windows (version 6.0 or higher). Although the database you connect to can be theoretically on any platform and on a remote machine, it must have an ODBC driver for Windows installed on your local machine. In addition to LabVIEW, you need to have the latest version of the MDAC (Microsoft Data Access Components) ActiveX components, which includes ADO, installed on your machine. You may already have it installed, but if you don't, you can download it at http://microsoft.com/data 1b. Setup ---------------- 1. To install LabSQL, simply place the "LabSQL ADO VIs" in any convenient directory. For ease of use, we suggest you create a custom palette under the "User Libraries" LabVIEW palette that links to this directory, so you will have easy access to the ADO VIs. See the LabVIEW documentation if you need to know how to create a custom palette. 2. As with any database application on Windows, you'll need to create a DSN (Data Source Name) in the ODBC control panel. This DSN is used in your LabVIEW application to connect to the appropriate database. If you want to set up the example database, do the following: a.Go to your Windows Control Panels, and open "ODBC Data Sources" b.Click on the "System DSN" tab c.Click on the "Add..." button. d. From the list of drivers, choose "Microsoft Access Driver" e.At the dialog box, type in "myDB" for the Data Source Name. Then click on "Select..." button, and find the file "Sample Database.mdb" included with the LabSQL examples. Leave everything else as it is, and hit OK. f. Close the ODBC control panel g. Test the connection by running one of the examples provided. 2. Using LabSQL ----------------- Using LabSQL is mainly a matter of understanding how SQL statements work and how the ADO object work: the Command object, the Connection object, and the Recordset object. You can use the top-level "easy" VI called "SQL Execute.vi" to directly execute a SQL statement. The three simple examples provided show you how to retrieve data, insert a row, and use recordsets to move through one row of data at a time. 4. TECHNICAL SUPPORT -------------------- No formal technical support is offered on LabSQL. It's free for you to use at your own peril. While I can't promise I will have time to look into any issues, you may contact me with bugs or comments at: Jeffrey Travis <labsql@jeffreytravis.com> Also, if you enhance or add onto LabSQL, please let me know so I we can keep the LabVIEW community informed with up-to-date versions! Enjoy!

评论收藏

内容反馈

版权申诉