Want to know tableadapter? we have a huge selection of tableadapter information on alibabacloud.com
automatically generates a strong DataSet:1. Step: Add> new item> Dataset2. Drag and Drop a table from the server resource manager to DataSet. Note that the drag-and-drop process automatically generates strong DataSet and other classes based on the table structure, without dragging the data, the program is still connected to the database, and the database connection string is automatically written in App. Config.3. sample DataSet used in the Code: CC_RecordTableAdapter adapter = new CC_RecordTab
sqldataadapter SDA = new sqldataadapter (); Public form1 () { Initializecomponent (); } Private void form1_load (Object sender, eventargs E) { Sqlconnection conn = new sqlconnection ("Server = 127.0.0.1; database = pubs; uid = sa "); Sqlcommand scd = new sqlcommand ("select * from tables", Conn ); SDA. selectcommand = SCD; SDA. Fill (DT ); Datagridview1.datasource = DT; } # Region update database Private void button_save_click (Object sender, eventargs E) { Try { Sql
During the demonstration of layer-3 architecture development for my students, I used winform in vs2005 to establish the Dal, BLL, and uilayer-3 architectures, and used strong datasets in the Dal layer, bll layer processing logic. ProgramAfter running, the update, insert, delete, and other operations on the tableadapter take effect. Then I observe the MDF file and the data is not updated. when winform is disabled and winform is restarted, it is found
and drop the table from Server Explorer into the dataset. Note that the drag-and-drop process is automatically generated by the table structure of a strongly typed DataSet and other classes, not the data also dragged over, the program is still linked to the database, the database connection string is automatically written in the app.config.3, using the dataset example in your code: Cc_recordtableadapter adapter=new cc_recordtableadapter (); How do I know adapter's class name? The Adapter,name p
pros and cons of doing so. Iii. creating a strongly typed dataset in VS 2005In fact, a strongly typed DataSet is a generic dataset that defines their own columns and tables in advance, so that the compiler already knows what they will contain. Instead of wrapping your data as a "finger glove", a strongly typed dataset is like a "glove". Each subsequent version of Visual Studio makes the process of strongly typing a dataset easier. In this example, we will use the AdventureWorks database from
. Shows the architectural relationship between the three layers. Step 1: Create a BLL classThe entire BLL consists of four classes, one-to-one correspondence with tableadapter In Dal. Each class includes data acquisition, insertion, update, and deletion according to its business rules. To better distinguish the classes in Dal from those in Bll, we create two subfolders named dal and BLL respectively in the app_code folder. Step: Right-click the "app_c
Problem 1: An error occurred while querying with parameters, such as select * from user where userid = @ userid;Solution:If you are using the access version of northwind, replace the @ city parameter with the question mark. (Select customerid, companyName, contactname, contacttitle, address, city, region, postalcode, country, phone, fax from customers where city =?) Problem 2: an error occurs when an SQL statement with a subquery is used;Solution:Yeah, the typed dataset wizard tends to screw u
appropriate approach to the business logic layer . Open the typed DataSet Northwindwithsprocs in Visual Studio and add a method named Getdiscontinuedproducts to ProductsTableAdapter. Note: Since we have moved the Northwind database out of the App_Data folder, we should update the connection string in the Web.config file accordingly. in the second step we explored the value of updating the northwndconnectionstring in the Web.config file. If you forget to update, you will see an error message
essential 1. Creating strongly typed datasets and Tableadapter,tableadapter queries at the data layer can use existing stored procedures. Note: Dragging a table or stored procedure directly will create the TableAdapter 2. The classes in the middle tier are declared as data components with [System.ComponentModel.DataObject], and the crud methods correspond to [
In the previous article, add this sentence when entering an SQL statement in the self-created query method. Where Member name = @ member name, followed by a parameter name, a bit like set {This. What value = value ;}, After defining the name, you can enter a parameter for query. Private Static void: displays records of the specified member name () {Member Data tableadapter adapter = new member data tableada
I recently developed the C/S architecture software. I just copied it when I read this article in many aspects that I was not familiar with. Thanks very much to the original author. The following is the original article. In daily development, in order to write functions such as adding, updating, modifying, and deleting data, you have to deal with boring code and repeat the work .. The release of the official version of NET 2.0 is undoubtedly a great pleasure for our program developers. Some new e
have a valueWeakness: When the table field is incremented, you need to reconfigure the buildExample of using dataset in code (Mydo table): Mydotableadapter adapter = new Mydotableadapter ();How do I know the class name of adapter? The Adapter,name property of the lower half of the selected dataset is the class name, and you need to right-click the class name-parseGet all data: adapter. GetData (),Example program: Traverse to show all dataIAdapter. GetData () [i]. Age;FAQ: The class name is gene
Original: Building a backend management system for ASP. mvc4+ef5+easyui+unity2.x injection-MVC using RDL reportsThis time we're going to show MVC3 how to display the RDL report, the pit Dad's Microsoft has upgraded MVC to 5-wood has a good support report, so that MVC in some areas tend to short boardWe can only use RDL reports in some way.The razor view does not support ASP. NET server controls, but ASPX can, so users can actually display RDL reports or Crystal Reports through the ASPX view temp
"Recommended" Asp.net2.0+sql Server2005 to build multilayer applications!!!!! @ Apply for bonus points!@@! [Sell=5] with the release of. NET 2.0, Web applications built using ASP.net 2.0来 will become increasingly easy. 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
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,master pages,cl
A strongly typed dataset can help us quickly build the data access layer, and its simplicity allows us to use it extensively in small projects. But it also has some minor flaws, and here is a discussion of what the flaws are and how we can avoid them. 1 in a query, it only supports operations on this table and does not support operations on multiple tables. In this case, we can write a stored procedure ourselves and create a new TableAdapter so that
Creating a formal release of the data. NET 2.0 Official edition is a great event for our program developers, and many people are beginning to understand and use. NET 2.0. Some of the new enhancements to Visual Studio 2005 and the new features of Ado.net 2.0 make it easier and faster to develop highly scalable multi-tier database applications. This article will lead you to use Visual Studio 2005来 to create an example of an n-tier database application, and to introduce some of the knowledge relate
means that you can have them inherit from any object you want. all classes created using the LINQ to SQL designer are defined as "partial classes"-which means that you can optionally drop into code and add additional properties, methods and events to them. Object classes defined by using LINQ to SQL do not have to inherit from a specific base class, which means you can make it inherit from any object. All the classes generated using the LINQ to SQL designer are defined as "Local classes", which
filters are not supported, only some debugging windows can be used, Edit and Continue cannot be used, and Immediate windows are rendered useless. For more information, see debugger commands and functional limitations.Step 1: directly access the Stored Procedure Through Visual Studio, we can easily directly debug database objects. Let's take a look at how to use the Direct Database Debugging (DDD, Direct Database Debugging) function to enter the Products_SelectByCategoryID stored procedure in th
In the generated member data. XSD, right-click the adapter and choose add query. Select SQL statement Select next Enter the SQL statement you need Give the two methods a name. For the sake of intuition, I use a Chinese name. With this, you can directly use it in the program. Private Static void use the self-created query method () {Member Data tableadapter adapter = new member data tableadapter
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
