【正文】 graphical way to connect to the database, in a data environments can create multiple connections for connecting to different databases, each connection can create multiple mands, which can create multiple data sources so that you can only create a data environment in the case of different databases for different tables, views, stored procedures or queries visit. The same as ADO control, you can write code to support data access.In addition, VB to provide convenient and practical reporting capabilities, by using Report Designer and data environment, basic without writing code, you can easily use the mouse to drag the shortcut to create data reports, design data report can also preview and directly to the printer to print.Data Environment:Data environment is a hierarchical data source. Each data environment can contain a number of connection (Connection), by establishing a different connection to connect to a different database. Each connection contains a number of mands (Command), and each mand can also contain Serveral submands. Each mand corresponds to the database not only a table, a view or a stored procedure, but also can query designer to create queries. The hierarchical structure of the data environment, users can easily create a hierarchical set of records. For each mand, you can also add statistics to group or operation.Data Environment designer provides an interactive design environment. At design time, you can set the connection and mand objects for the value of the event by writing code to respond ADO, execute mands, create a hierarchical structure, you can also drag the Data Environment object to the form or report to create data bound controls.As can be directly generated by dragging the databound controls, which create data in the data environment and data report form is very convenient. VB in the data environment is the most powerful, most convenient to use a data objects with the ADO control or bind the controls, and data environment can also be binding, but bound controls and data environment, in addition to set the DataSource and DataField properties, but also with the control is bound to set the order, that is, The data used by the members (DataMember property).Data Report:Data Report Designer VB to provide a report designer, and VB in the data source object can provide with the use of the mouse drag operation, you can easily create plex reports. Data Report Designer created reports can be printed directly, you can also export the report to HTML or text file.29Data Report is a database application, a very important part. Data were recorded and maintenance work is pleted, often need to generate various forms of data reports.The main function of the database is to store data and provide data, the data is the role of statements retrieved from the database data to a certain format, printed or displayed. For example, payroll reports, sales reports, classroom transcripts, transcripts and so on.Works in the VB menu, select Add Data Report mand in the current project to add a data report. In addition, the system automatically create a data project to create a data report (DataReport) object and added to the project. Created the first data report design object s default name DataReportl. In the project window, doubleclick the DataReportl, open the Data Report Designer window contains a page header, detail area and a page footer, which is when the Report Designer to create default display state, in addition, it also includes the report header / report footer, group header / packet footnote.摘自： 網(wǎng)站30數(shù)據(jù)環(huán)境與設(shè)計(jì)者在 VB應(yīng)用程序中,除了使用數(shù)據(jù)對象和數(shù)據(jù)控制訪問數(shù)據(jù)庫,您還可以使用數(shù)據(jù)環(huán)境(數(shù)據(jù)環(huán)境)來訪問數(shù)據(jù)庫。[11]Kim, .“WebBased Speaking Test Development Using Visual Basic . Multimedia Assisted Language Learning”, 2022. 9(2), p. 7798.[12] Alan B.“ Learning SQLO39。[7] 王晟，馬里杰等編著《SQL Server 數(shù)據(jù)庫開發(fā)經(jīng)典案例解析》，北京：清華大學(xué)出版社，2022 年，P21 。[2] 龔沛曾，陸慰民，楊志強(qiáng)編著《Visual Basic 程序設(shè)計(jì)簡明教程》，北京：高等教育出版社，2022 年，P5 。還有很多的難題在同學(xué)的幫助下完成了，例如很多數(shù)據(jù)庫問題，就在同學(xué)的幫助下一點(diǎn)點(diǎn)理解并解決了難題，在此我深表感謝。還有很多的難題在同學(xué)的幫助下完成了，例如很多數(shù)據(jù)庫問題，就在同學(xué)的幫助下一點(diǎn)點(diǎn)理解并解決了難題，在此我深表感謝。這就要自己一點(diǎn)點(diǎn)地鉆研，一個問題通常要上網(wǎng)翻閱很多的資料才能理解，程序代碼才能繼續(xù)下去，解決問題過程雖說很艱難，但是解決完問題后的那種喜悅是言語無法比擬的。庫存管理就是材料和成品的庫存分析。此外有設(shè)置用戶權(quán)限功能的用戶可以設(shè)置其它用戶的操作權(quán)限，例如入庫管理權(quán)限、出庫管理權(quán)限、員工錄入權(quán)限等不同的操作權(quán)限。圖 用戶權(quán)限管理界面24第 6 章 總結(jié)與展望 總結(jié)此手工成品管理系統(tǒng)從開始考慮選題到完成歷時 4個月。+39。查詢庫存信息 = select * from 成品庫存信息表 where ( amp。 amp。 amp。 還款金額=0 find 39。圖表顯示數(shù)據(jù) = amp。 + + 39。%39。039。%39。%39。 + m + 39。 + + 39。 + + 39。圖 成品入庫錄入界面20其主要代碼如下：Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer) If = 1 Then If KeyCode = vbKeyReturn Then If = False Then = True Else = False = select * from 成品入庫信息表 End If End If End IfEnd Sub材料入庫錄入和此類似不再贅述 成品入庫分析成品入庫分析管理界面如圖 。修改 blnAdd = False tlbState False lngOL = Len(( amp。記錄集小于 0 Text1(1) = 01 39。記錄集移動到最后一個 Text1(1) = Format(Val((本級編號)) + 1, 00) 39。and 編碼級次= amp。打開部門信息表，部門全稱為模糊查詢它父節(jié)點(diǎn)編號和本級編碼級次 select * from 部門信息表 where 部門全稱 like 39。添加同級 tlbState False blnTJ = True blnAdd = True18 For i = 0 To Text1(i).text = Next i If 0 Then 39。 39。, con, adOpenKeyset, adLockOptimistic If 0 Then Command1_Click Dim i As Integer For i = 0 To 9 Txt_info(i).text = Next i End IfEnd Sub 買家管理模塊和供應(yīng)商模塊類似，在此處不再贅述 成品結(jié)構(gòu)信息管理界面如圖 。結(jié)束 If 語句Txt_info(1).Enabled = TrueEnd SubPrivate Sub Cmd_del_Click()16 Dim rs As New If MsgBox(確認(rèn)刪除此供應(yīng)商信息？, vbInformation + vbYesNo, 信息提示) = vbYes Then select * from 供應(yīng)商信息表 where 供應(yīng)商編號=39。如果記錄集為空 Txt_info(0).text = Dat