Updating a dataset
For more information see Generating Commands with Command Builders. After a row updates successfully, the changes to that row are accepted.When using Each command associated with the Db Data Adapter usually has a parameters collection associated with it.I tried declaring a new Dataset1 Data Table, and then updating that, but it still won't show any changes in my database. I KNOW, however, that the changes are saved in the Data Set, because when I fill a new datatable later, the record is there. Update(NDT); You fill NDT and then immediately save it. Remember these facts about database objects and design as you proceed.Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.However, you can create a Sql Command Builder or Ole Db Command Builder object to automatically generate SQL statements for single-table updates if you set the Select Command property of a . Then, any additional SQL statements that you do not set are generated by the Command Builder.
An application can call the Get Changes method in situations where you must control the sequence of statement types (for example, INSERTs before UPDATEs).Parameters are mapped to the current row through the Source Column and Source Version properties of a . Source Column refers to a Data Table column that the Db Data Adapter references to obtain parameter values for the current row.After your dataset is populated with data, you will typically perform some kind of manipulation of the data before sending it back to the data source or to another process or application.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. Fill(category Table) Dim category Row As Data Row = category Table.