creating a class in visual basic

Define a Class in Visual Basic .NET

Ngày tải lên : 07/11/2013, 15:15

... implement the same interface in different ways An interface cannot exist as an object: It has no code and no place to store object data A class that implements an interface has an explicit contract with ... declarations as needed The point in wrapping a table in a class is to make access to this table as simple as possible You could have one method to insert new rows to the database and one to update existing ... Save() As Boolean Function Delete() As Boolean #End Region As I mentioned in the introduction to this chapter, one of the great advantages to wrapping up all access to a database table within...

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Tài liệu Creating a Class That Participates in an Automatic Transaction ppt

Ngày tải lên : 24/12/2013, 05:15

... automatically in an existing transaction, to start a new transaction, or to not participate in a transaction The following steps prepare a class to participate in an automatic transaction: Derive the class ... transactions that span multiple remote databases and multiple resource managers Objects participating in automatic transactions not need to anticipate how they might be used within a transaction ... automatic transaction Once an object is marked to participate in a transaction, it will automatically execute within a transaction The object's transactional behavior is controlled by the value...

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Creating a dataview using visual studio NET

Ngày tải lên : 20/08/2013, 16:48

... data stored in dataView1 to dataGrid1 and allows dataGrid1 to access any data stored in dataView1 Figure 13.2: Setting the Properties of dataGrid1 Select View ➣ Code and set the Form1() ... Windows Form Designer support 14 // 15 InitializeComponent(); 16 17 // call the Fill() method of sqlDataAdapter1 18 // to populate dataSet11 with a DataTable named 19 // Customers 20 sqlDataAdapter1.Fill(dataSet11, ... sqlDataAdapter1.Fill(dataSet11, "Customers"); 21 } Compile and run your form by pressing Ctrl+F5 Figure 13.3 shows the running form Notice that the information in the form comes from the DataView...

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Tài liệu Creating a DataView Using Visual Studio .NET pptx

Ngày tải lên : 21/01/2014, 07:20

... data stored in dataView1 to dataGrid1 and allows dataGrid1 to access any data stored in dataView1 Figure 13.2: Setting the Properties of dataGrid1 Select View ➣ Code and set the Form1() ... Windows Form Designer support 14 // 15 InitializeComponent(); 16 17 // call the Fill() method of sqlDataAdapter1 18 // to populate dataSet11 with a DataTable named 19 // Customers 20 sqlDataAdapter1.Fill(dataSet11, ... sqlDataAdapter1.Fill(dataSet11, "Customers"); 21 } Compile and run your form by pressing Ctrl+F5 Figure 13.3 shows the running form Notice that the information in the form comes from the DataView...

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Tài liệu Creating a Table in the Database from a DataTable Schema docx

Ngày tải lên : 21/01/2014, 11:20

... constructs a Data Definition Language (DDL) statement to create a table in a SQL Server database from the schema of a DataTable The complete statement that is generated is shown in Example 10-16 Example ... command If you have a number of tables in a DataSet that you want to create in a database, you can iterate through the collection of DataRelation objects for the DataSet and use the ALTER TABLE ... ConfigurationSettings.AppSettings["Sql_ConnectString"]); MessageBox.Show("Table " + TABLENAME + " created.", "Create DataTable from schema.", MessageBoxButtons.OK, MessageBoxIcon.Information); } private void CreateTableFromSchema(DataTable...

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Tài liệu Creating a Class doc

Ngày tải lên : 21/01/2014, 13:20

... A class file defines characteristics about the class by creating properties and methods The properties and methods of a class are referred to as members, and they are all defined within the ... was originally defined in the Cube class file NOTE Some of Flash's built -in classes—for example, MovieClip, LoadVars, and SharedObject—are dynamic classes, which is why you can dynamically add ... height * width; } } After coding the Cube class, you save it as an as file named Cube.as in the same directory as your Flash authoring file (Alternatively, you can place your as class files elsewhere,...

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doing objects in visual basic 2005

Ngày tải lên : 01/06/2014, 01:21

... Visual Basic does support static class data and static class methods Static class data (also called shared data) is data that the class retains, independent of any object Use static class data any ... private variables and public Property statements within a class, as shown in the “What Are Classes?” section earlier, you are encapsulating that data Inheritance: Attaining Reuse Things that are ... application You can also use any class in your application as a base class and inherit from it You can see inheritance in action as soon as you create your ﬁrst form When you create a form, Visual...

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oop in visual basic .net

Ngày tải lên : 17/10/2014, 14:03

... Programming in Visual Basic NET 17 Instantiating and Initializing Objects Topic Objective To explain how to instantiate and initialize objects Lead -in The method for instantiating and initializing ... be familiar with creating classes in Visual Basic NET Scenario In this lab, you will begin creating the Cargo system You will create the Customer class and a test application to instantiate, initialize, ... local variable value End Get End Get Set (ByVal Value As Integer) Set (ByVal Value As Integer) intMyData = Value 'Store Value in local variable intMyData = Value 'Store Value in local variable...

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Tài liệu Make a Generic Search Form in a Visual Basic .NET docx

Ngày tải lên : 26/01/2014, 11:20

... in Listing 8.18 into the form Taking the strKeyValue passed from the results of the search, a data adapter is created and a DataSet is filled Next, the individual data row is created Last, each ... ID Label Caption Company Name Label Caption Contact Label Caption Contact Title Label Caption Address Label Caption City Label Caption Region Label Caption Country Label Caption Phone Label Caption ... more information on creating custom classes, properties, and methods for use with your database application, see Chapter 9, "Using Classes with Databases to Make Life Easier." Steps Open and run...

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Creating a Writing Course Utilizing Class and Student Blogs.doc

Ngày tải lên : 06/09/2013, 05:10

... a teacher to create as many class blogs” as deemed necessary to organize class materials For example, it must be possible for a teacher to create a blog for class notes and another for posting ... to have access to them An easy way to this is to create a message to the students containing all the information regarding the class blogs and paste it into the message section of the invitation ... example, a blog of class notes should be titled class notes.” By creating separate class blogs, information can be efficiently organized For example, one class blog can be solely for keeping...

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Creating Custom Columns in a Windows Forms DataGrid

Ngày tải lên : 20/10/2013, 12:15

... abstract DataGridColumnStyle class It defines the attributes, display format, and behavior of cells in a DataGrid column representing a Boolean value At runtime, each cell in the column hosts a ... DataGrid display column with the data column An exception will be thrown if duplicate mapping names are used The DataGridTextBoxColumn class inherits from the abstract DataGridColumnStyle class ... to the DataGrid The MappingName property of the DataGridTableStyle is set to the DataSource The MappingName of each DataGridColumnStyle object must be associated with the name of a DataColumn...

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Using a DataReader Object in Visual Studio .NET

Ngày tải lên : 07/11/2013, 10:15

... SqlDataReader object to a string Also notice you include the namespace when referencing the SqlDataReader class: you use System.Data.SqlClient SqlDataReader when creating the SqlDataReader object ... System.Data.SqlClient.SqlDataReader mySqlDataReader = sqlCommand1.ExecuteReader(); while (mySqlDataReader.Read()) { listView1.Items.Add(mySqlDataReader["CustomerID"].ToString()); listView1.Items.Add(mySqlDataReader["CompanyName"].ToString()); ... ConnectionString property is set to: data source=localhost;initial catalog=Northwind;persist security info=False;user id=sa;pwd=sa;workstation id=JMPRICE-DT1;packet size=4096 Notice the substring pwd=sa in...

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Tài liệu A Programmer''''s Introduction To Visual Basic .NET doc

Ngày tải lên : 10/12/2013, 16:15

... objects in VB Instances of objects you create that are managed by the runtime are called managed data You can interact with both managed and unmanaged data in the same application, although managed ... who have the most powerful and productive version of Visual Basic ever: a Visual Basic for both Windows and Web application development; a Visual Basic for creating and consuming next generation ... using it as the basis for new classes For example, you could create a Vehicle class that provides basic functionality that could be inherited in both a Bicycle class and a Car class The important...

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Tài liệu Visual Basic Bách Khoa-Chương 3-Xử dụng class module doc

Ngày tải lên : 20/12/2013, 21:15

... Trên Add_Ins menu, bấm Add -In Manager Chọn VB Class Builder Utilitytrong danh sách sẳn có Dưới Load Behavior, chọn Loaded/Unloaded, bấm OK Theo bước sau đây, bạn thêm class vào ứng dụng : Trên Add-Ins ... code : Private Sub Class_ Initialize () 'Initialize Data iDept = End Sub Terminate event : Dùng để chấm dứt công việc Sau hàng code Private Sub Class_ Terminate() 'Any termination code End Sub Và ... Function PayIncrease (dPercent As Double) As Integer mvarSalary = mvarSalary * (1 + dPercent) End Function Chương 3_Phần 3_Ðoạn : Xử dụng Named Constants Khi bạn xử dụng cách thay (variables) suốt...

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Tài liệu Creating a Generic Class docx

Ngày tải lên : 24/12/2013, 09:16

... Greater than zero The current instance is greater than the value of the parameter As an example, consider the Circle class that was described in Chapter 7, Creating and Managing Classes and ... IComparable interface This interface contains a method called CompareTo, which takes a single parameter specifying the object to be compared to the current instance and returns an integer that indicates ... provide a means of comparing values between different instances The binary tree class is a class that you might find useful in many different applications Therefore, you will implement it as a class...

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Tài liệu Creating a Command Object Using Visual Studio .NET docx

Ngày tải lên : 21/01/2014, 07:20

... CustomerID, CompanyName, and ContactName columns using Query Builder, as shown in Figure 8.3 Figure 8.3: Adding the CustomerID, CompanyName, and ContactName columns to the query using Query Builder ... continue The CommandText property of your SqlCommand object is then set to the SELECT statement you created in Query Builder Note Save your MyDataReader project by selecting File ➣ Save All You'll ... SqlCommand object In the Add Table dialog, select the Customers table, as shown in Figure 8.2 Click the Add button to add the Customers table to your query Click the Close button to continue Figure...

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Tài liệu Creating a Connection Object Using Visual Studio .NET pdf

Ngày tải lên : 21/01/2014, 07:20

... details are correct At this point, you've entered all the mandatory details, and you can choose to save your details by clicking OK, or you can click Advanced to enter additional details such as ... object that connects to the SQL Server Northwind database is set to data source=localhost;initial catalog=Northwind;persist security info=False; user id=sa;pwd=sa;workstation id=JMPRICE-DT1;packet ... your password from the code Leave Allow Saving Password in its default non-enabled state; that way, the user will be prompted to enter the password For testing purposes, however, leaving your password...

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Tài liệu Creating a DataAdapter Object Using Visual Studio .NET doc

Ngày tải lên : 21/01/2014, 07:20

... for the Data Adapter Configuration Wizard Click the Finish button to complete the Wizard A SqlDataAdapter object named sqlDataAdapter1 is now added to the tray beneath your form, as shown in Figure ... This link allows you to re-enter the Wizard to configure your DataAdapter Generate Dataset This link allows you to generate a DataSet object using the information set for your DataAdapter You'll ... generate the INSERT, UPDATE, and DELETE statements along with the table mappings Figure 10.12 shows the final dialog box for the Data Adapter Configuration Wizard Figure 10.12: Final dialog box...

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Tài liệu Creating a DataSet Object Using Visual Studio .NET docx

Ngày tải lên : 21/01/2014, 07:20

... sqlDataAdapter1.Fill(dataSet11, "Products"); sqlConnection1.Close(); System.Data.DataTable myDataTable = dataSet11.Tables["Products"]; foreach (System.Data.DataRow myDataRow in myDataTable.Rows) ... myDataTable.Rows) { listView1.Items.Add(myDataRow["ProductID"].ToString()); listView1.Items.Add(myDataRow["ProductName"].ToString()); listView1.Items.Add(myDataRow["UnitPrice"].ToString()); } } Note Remember, ... DataSet object in the tray Your next step is to set the Form1_Load() method of your form as follows: private void Form1_Load(object sender, System.EventArgs e) { sqlConnection1.Open(); sqlDataAdapter1.Fill(dataSet11,...

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Báo cáo khoa học: "Creating a Gold Standard for Sentence Clustering in Multi-Document Summarization" potx

Ngày tải lên : 08/03/2014, 01:20

... on Automatic Summarization, Pittsburgh, PA Marina Meila 2007 Comparing clusterings–an information based distance Journal of Multivariate Analysis, 98(5):873–895 Martina Naughton 2007 Exploiting ... Proceedings of the 2007 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning (EMNLP-CoNLL), pages 410– 420 Regina Barzilay and Kathleen ... S IM F INDER Hatzivassiloglou et al (2001) created a set of 10.535 manually marked pairs of paragraphs Two human annotator were asked to judge if the paragraphs contained ’common information’...

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