One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.Applications communicate with a database, firstly, to retrieve the data stored there and present it in a user-friendly way, and secondly, to update the database by inserting, modifying and deleting data. An application accesses data either through a dataset or a data reader.
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Click Dim ds As New Data Set ds = Create Data Set() Data Grid View1.
NET, you can perform data access either programmatically or declaratively with out writing single piece of code.
It enables data bound controls to perform database tasks like retrieval, editing and updating using intermediate middle-tier business object.
It provides a structured way for you to bind data bound controls on page to middle-tier business object.
See the following example: Hi, I will try your solution soon, and I accept what you say, but for me is still not clear, how it was solved in . I do not mean nothing specific, I try only imagine, that there is year 2005, I have Visual Studio 2005 and . When both tables are in one database file, I simply use SQL command (I copied it from MS Access): Now you have two Data Sets with one table each. The lower one has all the defined methods of the Adapter.
NET earlier, because if I remember well, LINQ started in . I believe, that work with multiple data sources was possible in . NET technology, but I don't know how programers solved this in that time. NET Framework 2.0 and I would like to use 3 different data sources on different servers (MS Access, d Base, My SQL), use SQL queries for update one data source from second data source. By default there are going to be a Fill and Get Data methods that you will normally use to load data to the Adapter.So in my first post i though you actually had an SQL Server. For Joins i have written an article found here and i hope you find helpful as an entry point. We can create this situation for demonstration (see attached files): 1. The second database file has one table "Prod2" and 2 columns (Product ID, Product Price) 4.For Inserts and Updates LINQ is limmited to row by row process, as a datatable would, so you might find it useful. There is actually a way of updating one datatable object without iterating through its every row with LINQ and this is creating a third datatable with a SELECT and then loading the datatable you need to update with the one you just created. I would like to update column Product Price of table "Prod2" with values from column Product Price of table "Prod1". The first(upper) part has the columns of the Adapter. Various components of the data provider retrieve data for the application and update data. The object model can be pictorially described as: The data residing in a data store or database is retrieved through the data provider.Net since data is transferred to and from a database through a data adapter.