Gridview rowupdating get key
In this tutorial we'll implement optimistic concurrency control to handle this risk.
For web applications that only allow users to view data, or for those that include only a single user who can modify data, there's no threat of two concurrent users accidentally overwriting one another's changes.
Jisun changes the product name to "Chai Tea" and clicks the Update button. At this point in time, the database has the values "Chai Tea," the category Beverages, the supplier Exotic Liquids, and so on for this particular product.
However, the Grid View on Sam's screen still shows the product name in the editable Grid View row as "Chai".
As we saw in the first tutorial, doing so will add a new Table Adapter to the Typed Data Set, automatically launching the Table Adapter Configuration Wizard.
In the first screen, we're prompted to specify the database to connect to - connect to the same Northwind database using the .
Optimistic concurrency control works by ensuring that the record being updated or deleted has the same values as it did when the updating or deleting process started.CREATE TABLE [dbo].[Brand]( [ID] [bigint] NOT NULL, [Name] [varchar](max) NOT NULL, CONSTRAINT [PK_Brand] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] CREATE TABLE [dbo].[Product]( [ID] [bigint] NOT NULL, [Name] [varchar](max) NULL, [Description] [varchar](max) NULL, [Brand ID] [bigint] NULL, CONSTRAINT [PK_Product_2] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] INSERT INTO Brand Values(1,'Kohinoor') INSERT INTO Brand Values(2,'Proctor & Gamble') INSERT INTO Brand Values(3,'Telenor') INSERT INTO Brand Values(4,'Unilever') INSERT INTO PRODUCT VALUES(1,'Lux Beauty Soap','Product of Unilever',4) INSERT INTO PRODUCT VALUES(2,'Tibbet Pomed','Winter Product',1) INSERT INTO PRODUCT VALUES(3,'Data SIM','Subscriber Identity Module',3) INSERT INTO PRODUCT VALUES(4,'Nippon','Color Television',1) Note: If you use windows authentication then use the first key. Update server name, Database name, User name, Password as per your settings. Now add the Grid View Control like Below: Protected Sub Page_Load(sender As Object, e As System. Load If Not Is Post Back Then Dim dt As Data Table Dim SQL As [String] = "SELECT P. For example, if a user locks a record for editing and then leaves for the day before unlocking it, no other user will be able to update that record until the original user returns and completes his update.Therefore, in situations where pessimistic concurrency is used, there's typically a timeout that, if reached, cancels the lock.