variables constants and calculations in visual basic

Chapter 3 Variables, Constants and Calculations

... object• Short –sht• Integer –int• Long –lng• Single –sng• Double –dbl1Chapter 3 Variables, Constants and Calculations Programming In C Shap©20093-2 Variables & Constants • Variable– ... Level Variables Block Level Variables ©20093-18 Calculations • Calculations can be performed using properties of certain objects, variables, constants, and numeric literals• Do Not use Strings ... EventArgs e){int intSoA, intSoB;Double dblKetQua;try{intSoA = int.Parse(txtA.Text);intSoB = Convert.ToInt32(txtB.Text);dblKetQua = intSoA + intSoB;lblKQ.Text = dblKetQua.ToString();}catch...

Define a Class in Visual Basic .NET

Danh mục: Cơ sở dữ liệu

... define two methods: save and delete. (The retrieve method will be defined in a subsequent section.) Add the save and delete methods to your interface, as in Listing 9.7. Listing 9.7 CustomerInterface9_1.vb: ... 3. Finally, add a ToString method to output all the data of the class in a string. This is extraordinarily useful for debugging. Your finished interface should look like Listing 9.8. Listing ... by limiting the class to properties representing the columns in the Customers table and to methods that insert, delete, and update data. Technique Visual Basic .NET has a specific kind of...

Tài liệu Data base Access and Management8-1Learn Visual Basic 6 tutorial ppt

Danh mục: Kỹ thuật lập trình

... original Visual Basic for DOS and Visual Basic For Windows were introduced in 1991. • Visual Basic 3.0 (a vast improvement over previous versions) was released in 1993. • Visual Basic ... Workgroups, Windows NT, or Windows 95 • Applications built using the 32 bit version of Visual Basic 4.0, Visual Basic 5.0 and Visual Basic 6.0 will only run with Windows 95 or Windows NT (Version ... 10-14 Using the Windows Clipboard 10-17 Printing with Visual Basic 10-18 Multiple Form Visual Basic Applications 10-21 Visual Basic Multiple Document Interface (MDI) 10-25 Creating a Help...

process engineering and design using visual basic

Danh mục: Hóa học - Dầu khí

... engineering and design using Visual Basic Numerical methods in linear algebraGauss elimination [6] In this method unknowns are eliminated by combining equations such thatthe n equations and ... trademarks, and are used only for identiﬁcation and explanation without intent to infringe.Library of Congress Cataloging -in- Publication DataDatta, Arun.Process engineering and design using Visual BASIC ... 27, 2007 11:16 AM xvi Process engineering and design using Visual Basic PRV isolation valves 268Inlet piping to PRVs 270Discharge piping from PRVs 271Contingency quantiﬁcation 272General...

data structures and algorithms using visual basic.net - michael mcmillan

Danh mục: Kỹ thuật lập trình

... library includes a generic collection class for storingdata. The class includes two methods and two properties for adding, remov-ing, retrieving, and determining the number of items in the collection. ... Integer,_ByVal sValue As Integer) As IntegerDim index As IntegerFor index=0Toarr.GetUpperBound(0)If (arr(index) = sValue) ThenReturn indexEnd IfNextReturn -1End FunctionThe following ... CArray(numItems)Dim index As IntegerFor index=0TonumItemsP1: KSF/ICD0521547652pre CB820-McMillan-v1 April 21, 2005 16:14DATA STRUCTURES AND ALGORITHMSUSING VISUAL BASIC .NETThis is the ﬁrst Visual Basic. NET...

doing objects in visual basic 2005

Danh mục: Đại cương

... of the other books in this series, this book is about designing and developing great applications for Visual Basic using object-oriented principles. However, today’s Visual Basic developer is ... parts. And since Visual Basic is now a fully object-oriented programming language, using an object-oriented approach to thinking about your appli-cation makes it easier to map these thoughts into ... make it easier and more natural to work with string variables. Understanding how to create an object and call its properties and methods is crucial to any development with Visual Basic. Chapter...

DATA STRUCTURES AND ALGORITHMS USING VISUAL BASIC.NET potx

Danh mục: Kỹ thuật lập trình

... strings, such as concatenation, returning substrings, insertingcharacters, removing characters, and so forth. We examine the String class in Chapter 8.VB.NET strings are immutable, meaning ... salary (an integer), and identiﬁcation number (a string, or an integer), as well as other attributes.Since storing each of these data values in separate variables could becomingconfusing very ... within the same method deﬁnition. This is accomplishedby utilizing a Get clause and a Set clause. Here are the property methods forgetting and setting x-coordinate and y-coordinate values in...

Professional ASP.NET 3.5 in C# and Visual Basic Part 170 doc

Danh mục: Quản trị Web

... 814WebPartZone controls, dragging and dropping in, 817XAML, viewing and editing in, 1612–1617XHTML in, 1571–1573XML Web service.SeeXML WebServices, buildingzone layouts, 817 Visual Studio Conversion ... from,1189–1190using external style sheets in, 864–865using inline styles in, 866using internal style sheets in, 865–866Web Partsallowing user to change modeof page, 820–833creating custom, ... 1425 in DetailsView control,349–350handling errors in GridViewcontrol during, 337–339IIS 7 dependencies and, 565LINQ to SQL, 493 in SQL Server, 381–382using AJAX on Web page, 897usingpkmgr.exeto...

Professional ASP.NET 3.5 in C# and Visual Basic Part 2 ppsx

Danh mục: Quản trị Web

... Grouping 472Other LINQ Operators 473LINQ Joins 473Paging Using LINQ 475LINQ to XML 476Joining XML Data 479LINQ to SQL 481Insert, Update, and Delete Queries through LINQ 490Extending LINQ ... Working with XML and LINQ to XML 497The Basics of XML 498The XML InfoSet 500XSD–XML Schema Deﬁnition 501Editing XML and XML Schema in Visual Studio 2008 503XmlReader and XmlWriter 506Using ... ListBox, RadioButtonList, and CheckBoxList 365TreeView 366Ad Rotator 366Menu 367Inline Data-Binding Syntax 367Data-Binding Syntax Changes 368XML Data Binding 369Expressions and Expression Builders...

Professional ASP.NET 3.5 in C# and Visual Basic Part 3 pptx

Danh mục: Quản trị Web

... Rendering 1210Adding Tag Attributes 1214Styling HTML 1217Themes and Skins 1220Adding Client-Side Features 1222Detecting and Reacting to Browser Capabilities 1231Using ViewState 1234Raising ... applications using mainly Visual Basic (VB). Visual Basic was not only a programming language; it was tied to an IDE that allowed for easy thick-clientapplication development. In the Visual Basic model, ... 1607Step 1: A Basic ASP.NET Application 1609Finding Vector-Based Content 1610Converting Vector Content to XAML 1611Tools for Viewing and Editing XAML 1614Integrating with Your Existing ASP.NET...

Professional ASP.NET 3.5 in C# and Visual Basic Part 4 potx

Danh mục: Quản trị Web

... snap -in when using Windows XP, or the new IIS interface ifyou are using Windows Vista) use theWebConfigurationManagerclass that is also available for buildingcustom administration tools.Listing ... 5:02pm Page xliiIntroductionExpanding on the Page FrameworkASP.NET pages can be built based upon visual inheritance. This was possible in the Windows Formsworld, but it is something that is relatively ... event informa-tion in a SQL Express ﬁle contained within the application. This change can be made by adding a<healthMonitoring> node to yourweb.configﬁle as presented in Listing I-5.xxxixEvjen...

Professional ASP.NET 3.5 in C# and Visual Basic Part 5 ppsx

Danh mục: Quản trị Web

... ASP.NET, be sure to check out Beginning ASP.NET 3.5: In C# and VB by ImarSpaanjaars (Wiley Publishing, Inc., 2008) to help you understand the basics. In addition to working with Web technologies, ... that you understand basic programmingconstructs, such as variables, For Eachloops, and object-oriented programming.You may also be wondering whether this book is for the Visual Basic developer ... require and shows you how to create a centrally managed look -and- feel for all the pages ofyour application by using themes and the skin ﬁles that are part of a theme.❑ Chapters 7, ‘‘Data Binding in...

Professional ASP.NET 3.5 in C# and Visual Basic Part 6 pdf

Danh mục: Quản trị Web

... having everything in a single viewable instance makes workingwith the ASP.NET page easier. Another great thing is that Visual Studio 2008 provides IntelliSense whenworking with the inline coding ... pagesinline. In fact, many page types have options for both inline and code-behind styles. The following tableshows your inline options when selecting ﬁles from this dialog.File Options Using Inline ... the examples in this book use an inline coding model because it workswell in showing an example in one listing. Even though the example is using an inline coding style, it ismy recommendation...

Professional ASP.NET 3.5 in C# and Visual Basic Part 7 ppt

Danh mục: Quản trị Web

... ClassC#using System;using System.Data;using System.Configuration;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using ... the code-behind model or the inline coding model.Basically, these directives are commands that the compiler uses when the page is compiled. Directivesare simple to incorporate into your pages. ... the language used for any inline rendering and script blocks.LinePragmas Booleanvalue that speciﬁes whether line pragmas are used with theresulting assembly.SrcPoints to the source ﬁle of...

Professional ASP.NET 3.5 in C# and Visual Basic Part 8 doc

Danh mục: Quản trị Web

... page from which any cross-page postings originate. Cross-pageposting between ASP.NET pages is explained later in the section ‘‘Cross-Page Posting’’ and again in Chapter 17.The@PreviousPageTypedirective ... Request.QueryString["ThemeChange"];}</script>If you create an ASP.NET 3.5 page and turn on tracing, you can see the order in which the main pageevents are initiated. They are ﬁred in ... you simply create an instance of that control type and populate thisinstance using theFindControl()method from thePreviousPageproperty. TheStringvalue assignedto theFindControl()method...