defining a relationship using visual studio net

... you'll create a version of the database that has some tables that contain data and some that are empty The following diagram illustrates the schema of the application database: Trang 18For these ... SQL Server Compact databases is provided in the Deploying a Database Change tutorial SQL Server Compact is a good choice for databases that are easy to manage using simple database tools like ... manipulate schemas and data in SQL Server Express and full SQL Server databases are not available for SQL Compact For example, you cannot use SQL Server Management Studio or Visual Studio database projects

Ngày tải lên: 20/10/2014, 14:03

... MyBase.Load Dim ds As New DataSet () ' Instantiate a Dataset ' Instantiate an OleDbDataAdapter for Access2000 database Authors.mdb and return table Authors Dim myData As New OleDbDataAdapter("Select ... idatabase m qua ADO, application trong NET làm vi c v i portabledatabase ch ch a m t hai tables, là copy t database m Khi nào c n,portable database này (ADO.NET) s đ c reconciled v i database ... database qua HTTP, ADO và CDO (Collaborative Data Objects), v.v Data Tier: Th ng là relational database nh Microsoft SQL Server hayOracle Ngoài ra còn có Exchange hay các database x a c a mainframe

Ngày tải lên: 25/10/2013, 06:15

... toolbars Any changes you make to a custom toolbar are permanent Adding tools to a toolbar You can add tools to any toolbar, including the standard toolbars If you want to add a tool to a toolbar, ... lose answering users’ questions later Part VI; Constants, Arrays, and Variables: This part helps you out with the syntax for declaring constants, arrays, and various variables in Visual C++ Part ... look at the alphabetical listings in that part For example, if you want to find out how to declare a pointer in Visual C++, go to the part on Constants, Arrays, and Variables, look alphabetically

Ngày tải lên: 25/03/2014, 16:07

... say that the class has been encapsulated A major benefit of OOP is that because the data and methods encapsulated inclasses are so closely tied together, we do not need to passarguments back and ... expiration is DaysC and the number oftrading days till expiration is DaysT, then DaysT is calculated as Trang 10DaysT ¼DaysC
2  int(DaysC=7) To convert calendar-day volatilities to trading-day ... to an ATM volatility that is, for example, 30 calendar daysout (which is somewhat difficult to envision since only on 1 day a month will an expiration be exactly 30 days away), we need amathematical

Ngày tải lên: 20/06/2014, 23:20

... manyautomated trading and risk management systems As shown inChapter 8, correlations and covariances are calculated usinghistorical price data But covariances can also be updated andforecast using ... broaderdescription of any combination of data storage and functionality.Classes are but one example of a type, as are variables andfunctions Instances of types allocate space for data storage and provide ... our CovarForecast class has severalPrivate member variables and a constructor function Also theCovarForecast class has a Private subroutine CalcForecasts() and aPublic method GetForecasts() In the

Ngày tải lên: 20/06/2014, 23:20

... data in a database as well aschanging the structure of tables within a database.SQL consists of a limited number of SQL statements andkeywords, which can be arranged logically to perform transactionsagainst ... auditingdata to find bad data or to highlight suspicious data, fixing baddata, and applying the fix to the data set or preferably saving thedata to a new data source The methods we choose to accomplishthese ... should capture data from your data source, clean it, andthen save it back or create a new data source with the clean data As with any process, it pays to plan ahead when building aDTMS Before you

Ngày tải lên: 20/06/2014, 23:20

... OleDbDataAdapter("Select * From OptionTrades, _ myConnect) Dim myDataSet As New DataSet() myConnect.Open() myAdapter.Fill(myDataSet, "myData") DataGrid1.DataSource = myDataSet DataGrid1.DataMember ... a database into XML. VB.NET DataSet objects provide methods that create XML documents from a data table and that also can convert XML data into a data source. This is accomplished through the ... implementing a form of SAX parser to make sure the XML message is well formed. However, an XmlTextReader object will not perform data validation against a DTD. To perform data validation, we could use an

Ngày tải lên: 20/06/2014, 23:20

... Trang 1Nguyễn Văn Trung Giáo trình thực hành Chuyên đề Lập trình với Visual Studio NET Các ví dụ được minh họa trên môi trường Microsoft Visual Studio 2005 Bài tập thực hành Visual Studio NET ... chọn Ad wse của h đã tạo ra trưthư viện đượ bàn phím, sa Application ư viện commpascalTriang dd Reference hộp thoại ước đó ợc tham khảo au đó in ra m n Đặt tên promonUtils bằngle1 trong cửe… Trang ... theinhVienVan Trang 17p dữ liệu các cao nhất trườnhập danh ) Trang 18Giá Form Hell Style Fixe trị mMain lo WinForms edSingle Application, đ sinh ra Chỉ Gh Ti Kí đổ Vô a sổ a cửa sỗ sẽ kh

Ngày tải lên: 21/06/2014, 09:20

... Trang 1ADO NET With the introduction of ADO NET, data access has become much easier, and Crystal Reports NET can take advantage of ADO and the ADO NET dataset Instead of having to work ... needs and the data sources available to you Data Source Description Project Data Crystal Reports NET can leverage the ADO NET Framework and report directly from datasets that appear in your application ... the data source will be a relational database, but the data could also reside in spreadsheets, text files, OLAP (Online Analytical Processing) data structures, and even nonrelational data sources

Ngày tải lên: 06/08/2014, 09:20

... the database that they were created from after any changes by selecting Database → Verify Database If you have databases or tables in your report that are not used, you may receive the message ... fields are similar, but a subtotal refers specifically to a sum, whereas a summary field could be a sum, an average, or a standard deviation Formula Fields Crystal Reports NET features a rich ... If you are using multiple databases or tables in your report, a prompt will appear with the question “Propagate database and server changes across tables with the same original information?”

Ngày tải lên: 06/08/2014, 09:20

... chapter, you will be able to actually look at the application we are creating and other examples that illustrate points along the way Planning Your Application Integrating reports is an easy ... back from the database Creating a Parameter Field The first step in creating a parameter field is specifying a name for that field Once you have created your parameter field, Crystal Reports will ... name in curly brackets, preceded by a ques­tion mark to indicate it is a parameter field ({?ParamFieldName}) You can also enter prompting text that will appear whenever the Parameter Field dialog

Ngày tải lên: 06/08/2014, 09:20

... using an Access database and it had been moved and was no longer available, you could set the UserData property to a string containing the location to the UserData, and that particular database ... in Chapter 8, “Formulas and Logic.” Refreshing the Data in a Report When a report is refreshed, it goes back to the database for the most current set of data available and runs again Drag and ... performance; if your database is only updated once a day (or once a month), you can keep track of how many times a user attempts to hit the database, and simply remind users with an information

Ngày tải lên: 06/08/2014, 09:20

... ParameterField() Dim myDiscreteValue As New ParameterDiscreteValue() Dim myRangeValues as New ParameterRangeValues() myParameterField = New ParameterField() myParameterField.ParameterFieldName ... myParameterField.ParameterFieldName = “LastYearsSales” myRangeValues.StartValue = 100000 myRangeValues.EndValue = 500000 myParameterField.CurrentValues.Add(myRangeValue) myParameterFields.Add(myParameterField) You can also combine ... this parameter Because in this example we are passing only a discrete value to the parameter, we would simply create a variable by dimensioning it as a ParameterDiscreteValue All we need to do at

Ngày tải lên: 06/08/2014, 09:20

... Reporting_App_Dataset—An application that only contains a dataset ❑ Reporting_App_ViewData—An application that displays an ADO NET dataset ❑ Reporting_App—A report that takes its data from an ADO NET dataset ... dataset—Creates a dataset from your datasource Trang 9OLAP Data OLAP data (sometimes called multidimensional data) can be accessed and used in your application through OLEDB for OLAP, a standard interface ... datasource Over the years, Crystal Reports has teamed up with a number of database and application vendors to create native drivers for PC or file-type databases, relational databases, and various

Ngày tải lên: 06/08/2014, 09:20

... an information-rich application that already contains some logic and performs calculations on a NET dataset, you’ll probably want to use the existing data in your application But, for calculations ... Most applications today are developed on an underlying database or other data source, and Crystal Reports NET can use this application data as the source for your reports, as we saw in the last ... data, SQL Commands, and SQL Expressions Database Structures Since all reports are based on a data source and the most common type of data source is a database, it follows that you might place

Ngày tải lên: 06/08/2014, 09:20

... MyOleAdapter As New System.Data.OleDb.OleDbDataAdapter() Dim MyDataSet As Data.DataSet MyOleAdapter.SelectCommand = New System.Data.OleDb.OleDbCommand(query, MyOleConn) MyOleAdapter.Fill(MyDataSet, ... properties and methods associated with the Database object There are two classes associated with Database They are Tables and Links The Tables class contains all of the tables that are used in ... myDatabase = myReport.DatabaseDim myTables = myDatabase.TablesDim myTable As CrystalDecisions.CrystalReports.Engine.TableFor Each myTable In myTables myTableLogOnInfo = myTable.LogOnInfomyTableLogOnInfo.ConnectionInfo

Ngày tải lên: 06/08/2014, 09:20

... Crystal Reports NET Sample applica­tions are available that use both Visual Basic NET and C# code, as well as any software updates and hot fixes that are available Crystal Decisions Technical Support ... to have a look at upgrading from Visual Studio NET 2002 Trang 17Upgrading to Visual Studio NET 2003 is a relatively pain-free process Once you have installed Visual Studio NET 2003, you can open ... the application To invoke the wizard, start Visual Studio NET, select Open Project, and open an existing Visual Basic 6 application This will launch the Visual Basic Upgrade Wizard In this instance,

Ngày tải lên: 06/08/2014, 09:20