tableadapter

consistency with transactions" (http://aspnet.4guysfromrolla.com/ articles/072705-1.aspx). Create the SqlTransaction object sqltransaction mytransaction = sqlconnectionobject.begintransaction (); Try { * * * ... Perform the database transaction ' s data modification statements ... * //If We reach this, no errors, so commit the transaction mytransaction.commit (); } Catch { //If We reach this, there was a error, so rollback the transaction mytransaction.rollback (); thro

Asp.net|server With the release of. NET 2.0, Web applications built with ASP.net 2.0来 will be made easier. With ASP.net 2.0 and SQL Server 2005, it will be easier to build a multi-tier architecture Web application than asp.net 1.1. In this article, you will build an example of a simple multi-tier application using asp.net 2.0 and SQL Server (. NET) using the April CTP version using Visual Studio 2,sql Server 2005. Some of the new features in NET 2.0 and SQL Server 2005, such as Objectdatasource,

the other is "author tableadapter" Another is tableadaptermanager" The designer creates a class for each data table you drag, This class is centrally managed by csharplanguage. demo7usetableadapters, Next, let's look at an example of using the demo7use. XSD file. Using system; Namespace csharplanguage{Public partial class demo _ 7: system. Web. UI. Page{Protected void page_load (Object sender, eventargs E){// Use the Dataset Designer Wizard

Asp.net| Create | access | data This last check box, "Generate DB Direct Method (GenerateDBDirectMethods)", if selected, automatically generates inserts (), Update (), and Delete () methods for TableAdapter. If you do not choose this option, all updates need to be implemented through the TableAdapter unique update () method that accepts a strongly typed DataSet, or a DataTable, or a single DataRow, o

Asp.net| Create | access | data Step Fifth: Complete the data access layer Note that the Productstableadapters class returns the values of CategoryID and SupplierID from the Products table, but does not include the Categories table CategoryName Fields and Suppliers table CompanyName fields, although when we display product information, these are probably the fields we want to display. We can extend the TableAdapter starting method GetProducts () to

, the entire able, or a DataRow set in a method call. In this mode, the developer deletes, inserts, modifies, and transmits the DataRow or the entire DataRow to an update method. This method then rounds the passed DataRow to determine whether the DataRow has been modified, a new record, or a deleted record through the RowState attribute of DataRow, then, appropriate database commands are issued for each record. Figure 22: After the Update method is called, all changes are synchronized with the d

of TableAdapters is to connect to the database and make the query resultsBusiness object. Categoriesdatatable is composed of Categoriestableadapter, which contains three methods of data access: GetCategories (): Performs the main query of the TableAdapter, returns the records of the CategoryID, CategoryName and description these 3 items. The automatic generation of insert and update methods is primarily the method used. Getcategorybycategoryid (Cat

databaseAnother pattern, which I call the batch update pattern, is to update the entire dataset, or the entire DataTable, or a DataRow collection in one method call. In this pattern, the developer deletes, inserts, modifies DataRow in a DataTable, and then passes these DataRow or the entire DataTable to an update method. The method then rounds through the incoming DataRow, DataRow the RowState property properties to determine whether the DataRow has been altered, the new record, or the deleted

Introduction: In the previous 2 tutorials, we explored how to use the FileUpload control to upload files from the client to the server and how to display binary data in a data Web control. In this section, we'll create a Web page to add a new kind. In addition to adding textboxes controls to the name and description properties of the class, we'll add 2 fileupload controls on the page--one for uploading new classes, the other for uploading classes. The uploaded images will be stored directly in

Step 5: complete the data access layer Note that the ProductsTableAdapters class returns the values of CategoryID and SupplierID from the Products table, but does not include the CategoryName field of the Categories table and the CompanyName field of the Suppliers table, although when we display product information, these are probably the fields we want to display. We can expand the start method GetProducts () of TableAdapter to include the values of

difficult to display them on one page. How do I add a scroll bar for them? A: You can place these controls in A Panel and set the AutoScroll attribute to true. If you use VS2005 to drag the data source to the form, all controls are automatically included in a Panel. 18. Q: TableAdapter has never appeared in. NET Compact Framework 1.0. Is it a new feature? A: Yes. TableAdapter is newly added in. NET Compact

Step 3: add parameterization method to the data access layer So far, ProductsTableAdapter has only one method, GetProducts (), which returns all products in the database. Operations on all products are useful, but we often want to obtain information about a specific product or all products under a specific category. To add such a feature to our data access layer, we can add a parameterized method to TableAdapter. Add parameterization: let's add a GetP

about how to use exec to construct the stored procedure of SQL statements.Create an ASP. NET webapplication and add a new one to the app_code directory (if not, right-click Add ASP. NET folder to create this directory ).Item, select dataset, enter the dataset name, and click OK.Right-click Add in the window and select tableadapter. The tableadapter Connection Wizard dialog box is displayed. Connect to the

from the actual application ). LINQ to SQL and ASP. NET. Implementing the Dal concept. 5. complete a notebook in four months for the first time. the basic phase of my notebook is one year, and the time for completing a notebook is about eight months. The production value is insufficient, complete one copy within four months. 6. LINQ to objects, LINQ to XML, and LINQ to Dataset Collect iqueryprovider's attention method, which shows how to make a simple Orm, and puts a rock into the top of th

For example, if the Learning Record of the above nothing member is blank, you can judge it in the program as follows: Private Static void processing NULL data () {Member Data tableadapter adapter = new member data tableadapter (); strong type data set. member data. member Data able DATA = adapter. getdata (); If (data [1]. is Learning Record null () {console. writeline ("Empty Learning Record");} else {cons

business rules into a BLL. It should be explained that in a real-world application, BLL is implemented in the form of class libraries, but in order to simplify the structure of the project, in this tutorial we will implement BLL as a series of classes in the App_Code folder. The graph has always shown the structural relationship between the presentation layer, the BLL, and the DAL. Figure one: BLL separates the presentation layer from the Dal and joins the business rules First step: Create BLL

adventureworks.xsd, the TableAdapter Configuration Wizard will run. At this point, click Cancel and we will drag the desired table from the Server Explorer. 4. Browse the Server Explorer toolbar to find the AdventureWorks database. (If you have not yet installed the AdventureWorks database, you can go to Microsoft's download page SQL Server databases samples and sample download it and some other SQL Server 2005 examples) 5. Drag the SalesOrderHeade

BLL. It should be explained that in a real-world application, BLL is implemented in the form of class libraries, but in order to simplify the structure of the project, in this tutorial we will implement BLL as a series of classes in the App_Code folder. The graph has always shown the structural relationship between the presentation layer, the BLL, and the DAL. Figure one: BLL separates the presentation layer from the Dal and joins the business rules First step: Create BLL Class Our BLL con

Step 6: add custom encoding to the DAL TableAdapter and able added to a strongly typed DataSet are defined in an XML Schema definition file (Northwind. xsd. In Solution Explorer, you can right-click the Northwind. xsd file and select View Code to open the Schema file. Figure 32: XML Schema definition file of the Northwinds strong-type DataSet This schema information will be translated into C # Or Visual Basic Encoding after compilation at design, or

.details_aspx.Converting a declarative strongly typed datasetIf the App_Code folder of a Visual Studio 2008 Web site project contains a strongly typed dataset class, you must also perform another change to repair the connectionString element in the Web. config file. In addition, you must set the ConnectionString element for each TableAdapter object in the DataSet class.Fix connectionString for strongly typed datasets In Solution E