print barcode labels in c# Click Update. The application updates the text in the Messages control. in Visual Studio .NET

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14. Click Update. The application updates the text in the Messages control.
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15. Close the application. Examine the RowUpdatingEventArgs Properties
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1. Add the following lines to the daCategories_RowUpdating event handler that you created in the previous exercise: 2. Me.txtMessages.Text &= vbCrLf & ("Executing a command of type " _ & e.StatementType.ToString) 3. Press F5 to run the application, and then click Fill. 4. Change the CategoryName of Category 1 to New Beverages, and then click Update. The application updates the text in the Messages control.
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5. Close the application.
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1. Change the da_Categories_RowUpdated event handler that you created in the previous exercise to read: 2. string strMsg; 3. 4. strMsg = "\nUpdate Completed."; 5. strMsg += ", " + e.RecordsAffected.ToString(); 6. strMsg += " records(s) updated."; 7. this.txtMessages.Text += strMsg; 8. 9. Press F5 to run the application, and then click Fill. 10. Change the CategoryName of Category 1 to New Beverages, and then click Update. The application updates the text in the Messages control.
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11. Close the application.
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OnRowUpdated Event The OnRowUpdated event is raised after the Update method executes the appropriate command against the data source. The event handler for this event is either passed an SqlRowUpdatedEventArgs or an OleDbRowUpdatedEventArgs argument, depending on the Data Provider. Either way, the event argument contains all of the same properties as the RowUpdatingEvent argument, plus an additional property, a read-only RecordsEffected argument that indicates the number of rows that were changed, inserted, or deleted by the SQL command that was executed. Respond to an OnRowUpdated Event
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1. Select daCategories in the ControlName list and then select RowUpdated in the MethodName list. Visual Studio displays the RowUpdated event handler template. 2. Add the following text to the Messages control to indicate that the event has been triggered: Me.txtMessages.Text &= vbCrLf & "Update completed" 3. Press F5 to run the application, and then click Fill to fill the data grids. 4. Change the CategoryName for Category 1, which we changed to New Beverages in the previous exercise, back to Beverages.
5. Click Update. The application updates the text in the Messages control.
6. Close the application.
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1. Add the following code to add the RowUpdated event template to the code editor: 2. private void daCategories_RowUpdate(object sender, 3. System.Data.SqlClient.SqlRowUpdatedEventArgs e) 4. { 5. string strMsg; 6. 7. strMsg = "\nUpdate Completed."; 8. this.txtMessages.Text += strMsg; } 9. Add the following code to connect the event handler in the class description: 10. this.daCategories.RowUpdated += 11. new System.Data.SqlClient.SqlRowUpdatedEventHandler (this.daCategories_RowUpdated); 12. Press F5 to run the application, and then click Fill to fill the data grids. 13. Change the CategoryName for Category 1, which we changed to New Beverages in the previous exercise, back to Beverages.
14. Click Update. The application updates the text in the Messages control.
15. Close the application. Examine the RowUpdatedEventArgs Properties
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1. Add the following lines to the daCategories_RowUpdated event handler that you created in the previous exercise: 2. Me.txtMessages.Text &= ", " & e.RecordsAffected.ToString & " record(s) updated." 3. Press F5 to run the application, and then click Fill. 4. Change the CategoryName of Category 1 to Beverages 2, and then click Update. The application updates the text in the Messages control.
5. Close the application.
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1. Change the daCategories_RowUpdated event handler that you created in the previous exercise to read: 2. string strMsg; 3. 4. strMsg = "\nUpdate Completed."; 5. strMsg += ", " + e.RecordsAffected.ToString(); 6. strMsg += " records(s) updated."; 7. this.txtMessages.Text += strMsg; 8. Press F5 to run the application, and then click Fill. 9. Change the CategoryName of Category 1 to Beverages 2, and then click Update. The application updates the text in the Messages control.
10. Close the application.
4 Quick Reference
To Create a DataAdapter in the Server Explorer Do this Drag a table into the form designer. Drag an OleDbDataAda pter or an SqlDataAdapte r onto the form designer. Cancel the Data Adapter Configuration Wizard if you wish to configure the DataAdapter manually. Declare the DataAdapter variable and the four Command object variables, and then instantiate them and assign the Command objects to the DataAdapter. Select the DataAdapter in the form designer, and then click Preview Dataset in the Properties window.
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