Rowupdating rowupdated gridview

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Figure 4: Specify the Data to Retrieve Using an Ad-Hoc SQL Statement (Click to view full-size image) On the following screen, enter the SQL query to use to retrieve the product information. Discontinued = discontinued End Sub _ Public Function Update Product( By Val product Name As String, By Val supplier ID As Nullable(Of Integer), _ By Val category ID As Nullable(Of Integer), By Val quantity Per Unit As String, _ By Val unit Price As Nullable(Of Decimal), By Val units In Stock As Nullable(Of Short), _ By Val units On Order As Nullable(Of Short), By Val reorder Level As Nullable(Of Short), _ By Val discontinued As Boolean, By Val product ID As Integer, _ _ By Val original_product Name As String, _ By Val original_supplier ID As Nullable(Of Integer), _ By Val original_category ID As Nullable(Of Integer), _ By Val original_quantity Per Unit As String, _ By Val original_unit Price As Nullable(Of Decimal), _ By Val original_units In Stock As Nullable(Of Short), _ By Val original_units On Order As Nullable(Of Short), _ By Val original_reorder Level As Nullable(Of Short), _ By Val original_discontinued As Boolean, _ By Val original_product ID As Integer) _ As Boolean ' STEP 1: Read in the current database product information Dim products As _ Northwind Optimistic Concurrency.Let's use the exact same SQL query used for the SELECT Product ID, Product Name, Supplier ID, Category ID, Quantity Per Unit, Unit Price, Units In Stock, Units On Order, Reorder Level, Discontinued, (SELECT Category Name FROM Categories WHERE Categories. Category ID) as Category Name, (SELECT Company Name FROM Suppliers WHERE Suppliers. Supplier ID) as Supplier Name FROM Products Table Adapter in the Original DAL (Click to view full-size image) Before moving onto the next screen, click the Advanced Options button. Products Optimistic Concurrency Data Table = _ Adapter.To have this Table Adapter employ optimistic concurrency control, simply check the "Use optimistic concurrency" checkbox. Get Product By Product ID(original_product ID) If products.Figure 6: Enable Optimistic Concurrency Control by Checking the "Use optimistic concurrency" Check Box (Click to view full-size image) Lastly, indicate that the Table Adapter should use the data access patterns that both fill a Data Table and return a Data Table; also indicate that the DB direct methods should be created. Count = 0 Then ' no matching record found, return false Return False End If Dim product As _ Northwind Optimistic Concurrency.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.Figure 1: When Two Users Simultaneously Update a Record There s Potential for One User 's Changes to Overwrite the Other 's (Click to view full-size image) Similarly, when two users are visiting a page, one user might be in the midst of updating a record when it is deleted by another user.

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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.Bromberg's Optmistic Concurrency Updating Logic for a brief look at a number of options). NET Typed Data Set provides one implementation that can be configured with just the tick of a checkbox.Enabling optimistic concurrency for a Table Adapter in the Typed Data Set augments the Table Adapter's statement, for example, updates the name and price of a product only if the current database values are equal to the values that were originally retrieved when updating the record in the Grid View.aspdotnet-suresh offers C#articles and tutorials,csharp dot net,articles and tutorials, VB.For a web application that allows multiple users to edit data, there is the risk that two users may be editing the same data at the same time.

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.Bromberg's Optmistic Concurrency Updating Logic for a brief look at a number of options). NET Typed Data Set provides one implementation that can be configured with just the tick of a checkbox.Enabling optimistic concurrency for a Table Adapter in the Typed Data Set augments the Table Adapter's statement, for example, updates the name and price of a product only if the current database values are equal to the values that were originally retrieved when updating the record in the Grid View.aspdotnet-suresh offers C#articles and tutorials,csharp dot net,articles and tutorials, VB.For a web application that allows multiple users to edit data, there is the risk that two users may be editing the same data at the same time.For example, imagine that two users, Jisun and Sam, were both visiting a page in our application that allowed visitors to update and delete the products through a Grid View control.