Updating the database with a dataadapter and the dataset


The second method I will show you is again using a dataset but this time we will loop through it to load the listbox.This method is good for times where you want to modify each value before adding it to the listbox.One great place to find connection string data for tons of different databases is at I am using a local instance of an access database that doesn’t require any real credentials to access. Ole Db namespace so we get to use Ole Db Connection as well as other classes you will see later.The first example will be to use a Data Adapter class and its fill method to load it into a Data Set.Think of this method like using a hose to fill up a bucket.Slightly different than the first method, differing only by how we load the data.



So how do we get this stupid name column out of our table “Employees” of the access database and into a control? One is to connect to the database, another thing is to query the database for the info and lastly we put that info into our source control… Connecting to the database is pretty straight forward and really starts out with picking the right connection object from the System. Since Access can be “accessed” through the OLEDB setup we can use the Ole Db Connection class for that. This is nothing but a string that tells the class where to find the database, what driver (or DSN) to use, any username and passwords to login to the database, and any security features we will need to implement for our access.Like if we wanted to make sure that each name is properly capitalized we could do that before adding it to the list Box1. The last method here for selecting data is using a command object and fetching what is called a “Reader”.This method is especially common because the command object is very flexible and good not only for select queries, but for updates, inserts and delete queries as well. We will use it again to show you a simple update in a second.The disadvantage is that it can get a bit tricky to update the dataset itself unless you have a good picture of how that dataset is setup.



Updating the database with a dataadapter and the dataset comments


  • Updating the Database with a DataAdapter and the DataSet profil de paulette60

    paulette60

    The Update method of the DataAdapter is called to resolve changes from a DataSet back to the data source. The Update method, like the Fill method, takes as arguments.…
  • Update table using SqlDataAdapter Update Database. profil de paulette60

    paulette60

    Update table using SqlDataAdapter Update Database C# / C Sharp. qry, conn; DataSet ds = new DataSet;.…
  • Reading and Updating an Access Database in C# The Coders. profil de paulette60

    paulette60

    In this article we talk about reading and updating an access database. The DataAdapter will use. be altering the dataset data, not the database.…
  • Updating access database using data adapter The Forums profil de paulette60

    paulette60

    Hello All, I am trying to update access table using code executes fine but the table does not get update query if tried directly in access.…
  • C# cannot update table in database with DataAdapter. Update profil de paulette60

    paulette60

    Hi All, I am having a lot of trouble updating a table in a MySQL database with the contents of a datatable in c#. The data in the datatable comes form…