generate qr code using vb.net For details about the values for each property, see Setting Field Properties, page 104. in .NET

Paint Code 128 Code Set B in .NET For details about the values for each property, see Setting Field Properties, page 104.

4
Code128 Encoder In .NET
Using Barcode creation for .NET framework Control to generate, create Code128 image in Visual Studio .NET applications.
www.OnBarcode.com
Scanning Code 128 Code Set A In Visual Studio .NET
Using Barcode reader for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Tab down to the next line, enter CompanyName as a field name, and then choose Text as the data type. After you select a data type, Access displays some property boxes in the Field Properties area in the lower part of the Table window. These boxes allow you to set properties settings that determine how Access handles the field and thereby customize a field. The properties Access displays depend on the data type you selected; the properties appear with some default values in place, as shown in Figure 4-20.
Print Barcode In VS .NET
Using Barcode printer for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Bar Code Decoder In .NET Framework
Using Barcode scanner for VS .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
For details about the values for each property, see Setting Field Properties, page 104.
Code 128B Encoder In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create USS Code 128 image in VS .NET applications.
www.OnBarcode.com
Code 128 Creation In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create Code 128 Code Set B image in ASP.NET applications.
www.OnBarcode.com
Part 2: Building a Microsoft Access Desktop Application
Code 128A Creator In VB.NET
Using Barcode maker for .NET framework Control to generate, create Code128 image in .NET framework applications.
www.OnBarcode.com
Barcode Creator In Visual Studio .NET
Using Barcode drawer for VS .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
4
Linear Encoder In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Linear 1D Barcode image in .NET framework applications.
www.OnBarcode.com
UPC - 13 Maker In Visual Studio .NET
Using Barcode generation for Visual Studio .NET Control to generate, create GS1 - 13 image in .NET framework applications.
www.OnBarcode.com
4
Bar Code Encoder In Visual Studio .NET
Using Barcode generator for .NET framework Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Ames Code Generator In .NET Framework
Using Barcode creation for .NET Control to generate, create 2 of 7 Code image in VS .NET applications.
www.OnBarcode.com
4
PDF417 Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Paint PDF 417 In None
Using Barcode generator for Microsoft Word Control to generate, create PDF417 image in Word applications.
www.OnBarcode.com
4
Encode QR Code ISO/IEC18004 In None
Using Barcode creation for Font Control to generate, create Quick Response Code image in Font applications.
www.OnBarcode.com
Printing EAN / UCC - 14 In Objective-C
Using Barcode printer for iPad Control to generate, create UCC - 12 image in iPad applications.
www.OnBarcode.com
4
Barcode Generator In None
Using Barcode printer for Office Excel Control to generate, create bar code image in Excel applications.
www.OnBarcode.com
Bar Code Recognizer In VB.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Part 2: Building a Microsoft Access Desktop Application
Encoding ANSI/AIM Code 39 In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
www.OnBarcode.com
Generating ECC200 In None
Using Barcode printer for Microsoft Excel Control to generate, create Data Matrix ECC200 image in Microsoft Excel applications.
www.OnBarcode.com
Microsoft Office Access 2003 Inside Out
Understanding Field Data Types
4 4 4 4 4 4
Access supports nine types of data, each with a specific purpose. You can see the details about each data type in Table 4-1. Access also gives you a tenth option, Lookup Wizard, to help you define the characteristics of foreign key fields that link to other tables. You ll learn about the Lookup Wizard (and why you shouldn t use it) in the next chapter.
Choosing Field Names
Microsoft Access gives you lots of flexibility when it comes to naming your fields. A field name can be up to 64 characters long, can include any combination of letters, numbers, spaces, and special characters except a period (.), an exclamation point (!), an accent grave (`), and brackets ([ ]); however, the name cannot begin with a space and cannot include control characters (ANSI values 0 through 31). In general, you should give your fields meaningful names and should use the same name throughout for a field that occurs in more than one table. You should avoid using field names that might also match any name internal to Microsoft Access or Visual Basic. For example, all objects have a Name property, so it s a good idea to qualify a field containing a name by calling it CustomerName or CompanyName. You should also avoid names that are the same as built-in functions, such as Date, Time, Now, or Space. See Microsoft Access Help for a list of all the built-in function names. Although you can use spaces anywhere within names in Access, you should try to create field names and table names without embedded spaces. Most SQL databases to which Access can attach do not support spaces within names. If you ever want to move your application to a client/server environment and store your data in an SQL database such as Microsoft SQL Server or Oracle, you ll have to change any names in your database tables that have an embedded space character. As you ll learn later in this book, table field names propagate into the queries, forms, reports, and data access pages that you design using these tables. So any name you decide to change later in a table must also be changed in all your queries, forms, reports, and data access pages. See Setting Table Design Options, page 133, for details about options to automatically propagate changes.
Table 4-1.
Access Data Types
Usage
Alphanumeric data Alphanumeric data sentences and paragraphs
Data Type
Text Memo
Size
Up to 255 characters Up to about 1 gigabyte (but controls to display a memo are limited to the first 65,535 characters) 1, 2, 4, 8, or 16 bytes 8 bytes
Number Date/Time
Numeric data Dates and times
Part 2: Building a Microsoft Access Desktop Application
Part 2: Building a Microsoft Access Desktop Application
Creating Your Database and Tables
Table 4-1.
Access Data Types
Usage
Monetary data, stored with 4 decimal places of precision Unique value generated by Access for each new record Boolean (true/false) data; Access stores the numeric value zero (0) for false, and minus one ( 1) for true. Pictures, graphs, or other ActiveX objects from another Windowsbased application A link address to a document or file on the World Wide Web, on an intranet, on a local area network (LAN), or on your local computer
Data Type
Currency AutoNumber Yes/No
Size
8 bytes 4 bytes (16 bytes for Replication ID) 1 bit
OLE Object
Up to about 2 gigabytes
Hyperlink
Up to about 1 gigabyte
For each field in your table, select the data type that is best suited to how you will use that field s data. For character data, you should normally select the Text data type. You can control the maximum length of a Text field by using a field property, as explained later. Use the Memo data type only for long strings of text that might exceed 255 characters or that might contain formatting characters such as tabs or line endings (carriage returns). When you select the Number data type, you should think carefully about what you enter as the Field Size property because this property choice will affect precision as well as length. (For example, integer numbers do not have decimals.) The Date/Time data type is useful for calendar or clock data and has the added benefit of allowing calculations in seconds, minutes, hours, days, months, or years. For example, you can find out the difference in days between two Date/Time values.
Understanding what s inside the Date/Time data type Use the Date/Time data type to store any date, time, or date and time value. It s useful to know that Access stores the date as the integer portion of the Date/Time data type and the time as the fractional portion the fraction of a day, measured from midnight, that the time represents, accurate to seconds. For example, 6:00:00 AM internally is 0.25. The day number is actually the number of days since December 30, 1899 (there will be a test on that later!) and can be a negative number for dates prior to that date. When two Date/Time fields contain only a date, you can subtract one from the other to find out how many days are between the two dates.
Copyright © OnBarcode.com . All rights reserved.