c# barcode generator free ChAPTER 12 in Visual C#.NET

Create Quick Response Code in Visual C#.NET ChAPTER 12

696 ChAPTER 12
Creating QR Code 2d Barcode In C#.NET
Using Barcode creator for .NET Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
www.OnBarcode.com
Read QR Code ISO/IEC18004 In Visual C#
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Working with Data Source Controls and Data-Bound Controls
Bar Code Creator In Visual C#.NET
Using Barcode generator for .NET Control to generate, create bar code image in Visual Studio .NET applications.
www.OnBarcode.com
Bar Code Decoder In Visual C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
You can then bind this data source to a control such as a GridView. The following markup shows an example.
Painting Quick Response Code In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
www.OnBarcode.com
Generating QR Code JIS X 0510 In .NET Framework
Using Barcode generator for VS .NET Control to generate, create QR Code 2d barcode image in .NET applications.
www.OnBarcode.com
<asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource1" AllowPaging="True" PageSize="10" AllowSorting="true"> </asp:GridView>
QR Code Encoder In Visual Basic .NET
Using Barcode maker for .NET framework Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
www.OnBarcode.com
Encode Code 39 Extended In C#
Using Barcode encoder for .NET framework Control to generate, create Code 39 Extended image in .NET framework applications.
www.OnBarcode.com
When the page is run, the GridView control passes sorting and paging information to the data source. However, because the paging is happening before the GridView is bound, the GridView does not know the number of pages to display. Therefore, you need to implement your own custom paging in this scenario to advance the PageIndex property of the GridView control on the user s request. After you reset this value, the GridView will pass the value on to the ObjectDataSource.
EAN 13 Drawer In Visual C#.NET
Using Barcode drawer for .NET framework Control to generate, create GTIN - 13 image in Visual Studio .NET applications.
www.OnBarcode.com
UPCA Encoder In Visual C#.NET
Using Barcode generator for VS .NET Control to generate, create UPC-A Supplement 2 image in Visual Studio .NET applications.
www.OnBarcode.com
Caching Data
1D Encoder In Visual C#.NET
Using Barcode drawer for VS .NET Control to generate, create Linear image in .NET framework applications.
www.OnBarcode.com
USPS Confirm Service Barcode Printer In C#.NET
Using Barcode printer for VS .NET Control to generate, create Planet image in Visual Studio .NET applications.
www.OnBarcode.com
You can tell ASP.NET to cache your ObjectDataSource control. This will keep the data in memory between page calls and can increase the performance and scalability of your application if the data is to be shared and accessed often. To indicate caching of an ObjectDataSource, you set the EnableCaching attribute to true. You then set the CacheDuration property to the number of seconds you want to have ASP.NET cache the data. The following shows an example of these settings.
Data Matrix ECC200 Scanner In Visual Basic .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Decoding Code 3/9 In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" TypeName="Shipper" SelectMethod="GetAllShippers" EnableCaching="true" CacheDuration="30"> </asp:ObjectDataSource>
Bar Code Creator In Java
Using Barcode maker for Android Control to generate, create bar code image in Android applications.
www.OnBarcode.com
PDF 417 Generation In None
Using Barcode creation for Online Control to generate, create PDF-417 2d barcode image in Online applications.
www.OnBarcode.com
The first call to this page will call the object and return its data. Subsequent calls within 30 seconds (such as moving through data pages) will use the cached data (and not call the underlying object).
Code128 Drawer In None
Using Barcode drawer for Font Control to generate, create Code 128B image in Font applications.
www.OnBarcode.com
Scan UPC Code In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Creating a DataObject Class
Barcode Reader In Visual Basic .NET
Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in .NET applications.
www.OnBarcode.com
Make Bar Code In None
Using Barcode printer for Excel Control to generate, create bar code image in Excel applications.
www.OnBarcode.com
There are not many restrictions on which objects you can use as the source of ObjectDataSource controls. If you know that your business object will be used as an ObjectDataSource, you can define attributes on your class that make consuming your class inside an ObjectDataSource easier in the designer. These attributes are used to predefine which methods to use as Select, Insert, Update, and Delete methods. To get started, you set the DataObject attribute at the top of your class. This simply indicates that your class is meant to be a DataObject. Again, this is not required for use with ObjectDataSource controls but simply makes things easier. The following shows an example of the class declaration and attribute.
Lesson 1: Connecting to Data with Data Source Controls
ChAPTER 12
Sample of Visual Basic Code <System.ComponentModel.DataObject()> _ Public Class Shipper Sample of C# Code [DataObject()] public class Shipper
You then add the DataObjectMethod attribute to the top of each method you intend to use as a data object method. You pass a DataObjectMethodType enum value to this attribute to indicate Delete, Insert, Update, or Select. The following code shows an example of the method signature and attribute.
Sample of Visual Basic Code <System.ComponentModel.DataObjectMethod(ComponentModel.DataObjectMethodType.Select)> _ Public Shared Function GetAllShippers() As DataTable Sample of C# Code [DataObjectMethod(DataObjectMethodType.Select)] public static DataTable GetAllShippers()
By defining these attributes, you make the designer aware of your business object s intentions. This can ease the burden of configuring an ObjectDataSource control when large business objects with many methods are involved.
Connecting to Relational Databases by Using SqlDataSource
The SqlDataSource control is used to configure access to relational databases such as SQL Server and Oracle. It can also be configured to work with Open Database Connectivity (ODBC) and Object Linking and Embedding (OLE) Db data connections. You configure the control to connect to one of these database types. The code inside the control will then use the appropriate data provider based on your configuration settings, including ADO.NET provider classes for SqlClient, OracleClient, OleDb, and Odbc. You configure the SqlDataSource control by first setting its ID property to a unique identifying string value. This property is similar to any other web control ID property. However, the value is used when referring to the data source during data binding (which will be discussed later in this section). You then set the ConnectionString property either to a valid connection string or to page script that reads the connection string from the Web.config file (as shown in the next code example). You then set various command properties, including commands for selecting, inserting, updating, and deleting data. The command properties you set are based on how you intend to use the control. For example, you use the SelectCommand to define an SQL statement that can be used to retrieve data from a database. In this case, you would use the Text SelectCommandType (which is the default). You can also set the SelectCommandType to StoredProcedure and then provide a stored procedure name for the SelectCommand attribute.
Copyright © OnBarcode.com . All rights reserved.