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How to update data using class

Posted on 2006-06-26
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Last Modified: 2010-04-23
Normally, I insert data like this for my web pages (VB.NET):

        cmd = New SqlCommand("Add_NewOrder", Conn)
        cmd.CommandType = CommandType.StoredProcedure
        Dim NewCateringOrderID As SqlParameter
        NewCateringOrderID = New SqlParameter("@NewCateringOrderID", SqlDbType.BigInt)
        NewCateringOrderID.Direction = ParameterDirection.Output
        cmd.Parameters.Add(NewCateringOrderID)

        ' pass customer info to stored proc
        cmd.Parameters.Add("@EventDate", txtEventDate.Text)
        cmd.Parameters.Add("@FirstName", txtFName.Text)

        cmd.ExecuteNonQuery()

I am taking a test for a job, and I am guessing they don't want m e to do it this way.  Is there a way to shove an insert into a class as a method then somehow use it to do the insert?  How would I pass parameters or create the right parameters though...meaning if I called the method by creating an instance of the class, how would it know which parameters to create if you wanted to reuse the method?

and what about an update method?
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Question by:dba123
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3 Comments
 
LVL 7

Expert Comment

by:pradeepsudharsan
ID: 16983609
When the Update method is called, changes in the DataSet are copied back to the database and the appropriate
data adpater's InsertCommand, DeleteCommand, or UpdateCommand is executed.
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pradeepsudharsan earned 2000 total points
ID: 16983694
Public Class Test
    Dim EventDate As String
    Dim FirstName As String
    Public Property Event_Date() As String
        Get
            Return EventDate
        End Get
        Set(ByVal Value As String)
            EventDate = Value
        End Set
    End Property

    Public Property First_Name() As String
        Get
            Return FirstName
        End Get
        Set(ByVal Value As String)
            FirstName = Value
        End Set
    End Property

End Class


Private Sub Button1_ServerClick(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Dim t As New Test
        t.Event_Date = "12-06-2006"
        t.FirstName = "xyz"

        cmd = New SqlCommand("Add_NewOrder", Conn)
        cmd.CommandType = CommandType.StoredProcedure
        Dim NewCateringOrderID As SqlParameter
        NewCateringOrderID = New SqlParameter("@NewCateringOrderID", SqlDbType.BigInt)
        NewCateringOrderID.Direction = ParameterDirection.Output
        cmd.Parameters.Add(NewCateringOrderID)

        ' pass customer info to stored proc
        cmd.Parameters.Add("@EventDate", t.Event_Date)
        cmd.Parameters.Add("@FirstName", t.FirstName)

        cmd.ExecuteNonQuery()

    End Sub

End Class
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LVL 2

Expert Comment

by:Bill_PSC
ID: 16984182
If you use the Data Apdapter's update method you must first endcurrentedit. ie:

 Me.BindingContext(DS, "DT").EndCurrentEdit()
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