Updating dataset in vb net

NET application by specifying command syntax at design time and, where possible, through the use of stored procedures. For example, the following code ensures that the deleted rows of the table are processed first, then the updated rows, and then the inserted rows.

You must explicitly set the commands before calling event and setting the Status to Skip Current Row. NVar Char, 15, "Category Name") Dim parameter As Sql Parameter = _ adapter.

Added)); USE [master] GO CREATE DATABASE [My School] GO USE [My School] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Course]([Course ID] [nvarchar](10) NOT NULL, [Year] [smallint] NOT NULL, [Title] [nvarchar](100) NOT NULL, [Credits] [int] NOT NULL, [Department ID] [int] NOT NULL, CONSTRAINT [PK_Course] PRIMARY KEY CLUSTERED ( [Course ID] ASC, [Year] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Department]([Department ID] [int] IDENTITY(1,1) NOT NULL, [Name] [nvarchar](50) NOT NULL, [Budget] [money] NOT NULL, [Start Date] [datetime] NOT NULL, [Administrator] [int] NULL, CONSTRAINT [PK_Department] PRIMARY KEY CLUSTERED ( [Department 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] GO INSERT [dbo].[Course] ([Course ID], [Year], [Title], [Credits], [Department ID]) VALUES (N' C1045', 2012, N' Calculus', 4, 7) INSERT [dbo].[Course] ([Course ID], [Year], [Title], [Credits], [Department ID]) VALUES (N' C1061', 2012, N' Physics', 4, 1) INSERT [dbo].[Course] ([Course ID], [Year], [Title], [Credits], [Department ID]) VALUES (N' C2021', 2012, N' Composition', 3, 2) INSERT [dbo].[Course] ([Course ID], [Year], [Title], [Credits], [Department ID]) VALUES (N' C2042', 2012, N' Literature', 4, 2) SET IDENTITY_INSERT [dbo].[Department] ON INSERT [dbo].[Department] ([Department ID], [Name], [Budget], [Start Date], [Administrator]) VALUES (1, N' Engineering', 350000.0000, CAST(0x0000999C00000000 AS Date Time), 2) INSERT [dbo].[Department] ([Department ID], [Name], [Budget], [Start Date], [Administrator]) VALUES (2, N' English', 120000.0000, CAST(0x0000999C00000000 AS Date Time), 6) INSERT [dbo].[Department] ([Department ID], [Name], [Budget], [Start Date], [Administrator]) VALUES (4, N' Economics', 200000.0000, CAST(0x0000999C00000000 AS Date Time), 4) INSERT [dbo].[Department] ([Department ID], [Name], [Budget], [Start Date], [Administrator]) VALUES (7, N' Mathematics', 250024.0000, CAST(0x0000999C00000000 AS Date Time), 3) SET IDENTITY_INSERT [dbo].[Department] OFF ALTER TABLE [dbo].[Course] WITH CHECK ADD CONSTRAINT [FK_Course_Department] FOREIGN KEY([Department ID]) REFERENCES [dbo].[Department] ([Department ID]) GO ALTER TABLE [dbo].[Course] CHECK CONSTRAINT [FK_Course_Department] GO using System; using System.

Properties class Program Data Adapters and Data Readers Row States and Row Versions Accept Changes and Reject Changes Merging Data Set Contents Retrieving Identity or Autonumber Values ADO.

The way the architecture works with the Data Adapter is that you can make any changes you want to the filled Data Set, and it won't affect the database until you call the Update method.

When Update is called, the Data Adapter will attempt to execute each query (UPDATE, INSERT, DELETE) on every row of the Data Set that has been updated, inserted, and deleted.

Listing 5-50 deletes the row with the value Tst ID.

The following examples demonstrate how to perform updates to modified rows by explicitly setting the Private Sub Adapter Update(By Val connection String As String) Using connection As Sql Connection = New Sql Connection( _ connection String) Dim adapter As Sql Data Adapter = New Sql Data Adapter( _ "SELECT Category ID, Category Name FROM dbo. Update Command = New Sql Command( _ "UPDATE Categories SET Category Name = @Category Name " & _ "WHERE Category ID = @Category ID", connection) adapter.

For example, if you call Delete on a row on the Data Set, then when Update is called on the Data Adapter, the Delete Command of the Data Adapter will be called using the particular row in the Data Set.

Note: Keep in mind that this Update is different than a SQL UPDATE statement.

For more information, see Updating Data Sources with Data Adapters.

If INSERT, UPDATE, or DELETE statements have not been specified, the method generates an exception.

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