ADO.Net Get Inserted Row's ROW ID without designer wizard - sql-server

Question

I have a generic update function that takes a datatable, select query and uses this to update the database tables.It is working fine. I need to know is there a way to get back the inserted row's ID (identity field) by changing something in the below code.
Public Function UpdateDataTable_GetID(ByVal dt As DataTable, ByVal SQL As String, ByVal connString As String) As Integer
Dim conn As SqlConnection = Nothing
Dim cmd As SqlCommand
Dim adp As SqlDataAdapter = Nothing
Dim cmdBuilder As SqlCommandBuilder = Nothing
Dim UpdatedID As Integer
If SQL.Length <= 0 Then
Return False
End If
conn = New Data.SqlClient.SqlConnection(connString)
cmd = New Data.SqlClient.SqlCommand
cmd.Connection = conn
cmd.CommandText = SQL
cmd.CommandType = CommandType.Text
adp = New Data.SqlClient.SqlDataAdapter(cmd)
cmdBuilder = New Data.SqlClient.SqlCommandBuilder(adp)
Try
UpdatedID = Convert.ToInt32(adp.Update(dt)) ' What to do here to get the just inserted ID instead of number of records updated
adp.Dispose()
cmdBuilder.Dispose()
Return UpdatedID
Catch ex As System.Data.SqlClient.SqlException
' Closing connection
Return -1
Finally
End try
End function
I am aware of solutions wherein I can append "select scope_identity()" to the insert Command of data adapter's query using designer as well as editing the adapter's insertcommand text and then doing an ExecuteScalar(). I want to know if the generic adapter.Update() can be tweaked to get the inserted row's ID.

Answer 1

you can subscribe to this event in code like this : (C# I dont know VB)
adp.RowUpdated += adapter_RowUpdated;
and write the event yourself :
void adapter_RowUpdated(object sender, SqlRowUpdatedEventArgs e)
{
if (e.StatementType == StatementType.Insert)
{
object id = e.Command.Parameters["#ID"].Value;
e.Row[_identityFieldName] = id;
}
}
In this example the following has been added to the commandtext first :
SET #ID = SCOPE_IDENTITY()
and a private variable _identityFieldName has been filled.
Maybe this can help you.
EDIT: I noticed you also use an SqlCommandBuilder that makes things easier to add the Scope identity :
SqlCommand inserter = new SqlCommand();
inserter = cmdBuilder.GetInsertCommand(true).Clone();
inserter.CommandText += " SET #ID = SCOPE_IDENTITY()";
SqlParameter param = new SqlParameter();
param.Direction = ParameterDirection.Output;
param.Size = 4;
param.DbType = DbType.Int32;
param.ParameterName = "#ID";
inserter.Parameters.Add(param);
adp.InsertCommand = inserter;