sqlAdapter caching data?

D

DC Gringo

I am having a problem reading a simple update to the database. Basically
I'm testing a small change to the pubs database -- changing the price of the
Busy Executive's Database Guide from 19.99 to 1997 and back. I am making
the changes directly to the database via Enterprise Manager.

Unfortunately, it seems does reflect the change when I refresh my web form
in the browser. Perhaps it's caching the
data retrieved by the SQLDataAdapter? (All of my code is generated by
VS.NET '03.

FYI, it works fine when I test on my developer workstation and database
LocalHost. It's only when I run the application on my development box that
it fails to "notice" the updates. I'm using the "copy project" method to
move it over.

----------------


Public Class Component1
Inherits System.ComponentModel.Component
#Region " Component Designer generated code "
Public Sub New(ByVal Container As System.ComponentModel.IContainer)
MyClass.New()
'Required for Windows.Forms Class Composition Designer support
Container.Add(Me)
End Sub
Public Sub New()
MyBase.New()
'This call is required by the Component Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Component overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Component Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Component Designer
'It can be modified using the Component Designer.
'Do not modify it using the code editor.
Friend WithEvents SqlDataAdapter1 As System.Data.SqlClient.SqlDataAdapter
Friend WithEvents SqlSelectCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents SqlInsertCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents SqlUpdateCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents SqlDeleteCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.SqlDataAdapter1 = New System.Data.SqlClient.SqlDataAdapter
Me.SqlDeleteCommand1 = New System.Data.SqlClient.SqlCommand
Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection
Me.SqlInsertCommand1 = New System.Data.SqlClient.SqlCommand
Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand
Me.SqlUpdateCommand1 = New System.Data.SqlClient.SqlCommand
'
'SqlDataAdapter1
'
Me.SqlDataAdapter1.DeleteCommand = Me.SqlDeleteCommand1
Me.SqlDataAdapter1.InsertCommand = Me.SqlInsertCommand1
Me.SqlDataAdapter1.SelectCommand = Me.SqlSelectCommand1
Me.SqlDataAdapter1.TableMappings.AddRange(New
System.Data.Common.DataTableMapping() {New
System.Data.Common.DataTableMapping("Table", "titles", New
System.Data.Common.DataColumnMapping() {New
System.Data.Common.DataColumnMapping("title_id", "title_id"), New
System.Data.Common.DataColumnMapping("title", "title"), New
System.Data.Common.DataColumnMapping("price", "price"), New
System.Data.Common.DataColumnMapping("notes", "notes"), New
System.Data.Common.DataColumnMapping("pubdate", "pubdate")})})
Me.SqlDataAdapter1.UpdateCommand = Me.SqlUpdateCommand1
'
'SqlDeleteCommand1
'
Me.SqlDeleteCommand1.CommandText = "DELETE FROM titles WHERE (title_id =
@Original_title_id) AND (notes = @Original_n" & _
"otes OR @Original_notes IS NULL AND notes IS NULL) AND (price =
@Original_price " & _
"OR @Original_price IS NULL AND price IS NULL) AND (pubdate =
@Original_pubdate) " & _
"AND (title = @Original_title)"
Me.SqlDeleteCommand1.Connection = Me.SqlConnection1
Me.SqlDeleteCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_title_id",
System.Data.SqlDbType.VarChar, 6, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "title_id",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlDeleteCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_notes",
System.Data.SqlDbType.VarChar, 200, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "notes",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlDeleteCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_price",
System.Data.SqlDbType.Money, 8, System.Data.ParameterDirection.Input, False,
CType(0, Byte), CType(0, Byte), "price",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlDeleteCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_pubdate",
System.Data.SqlDbType.DateTime, 8, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "pubdate",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlDeleteCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_title",
System.Data.SqlDbType.VarChar, 80, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "title",
System.Data.DataRowVersion.Original, Nothing))
'
'SqlConnection1
'
Me.SqlConnection1.ConnectionString =
"server=2k01;uid=sa;pwd=mypassword;database=pubs"
'
'SqlInsertCommand1
'
Me.SqlInsertCommand1.CommandText = "INSERT INTO titles(title_id, title,
price, notes, pubdate) VALUES (@title_id, @ti" & _
"tle, @price, @notes, @pubdate); SELECT title_id, title, price, notes,
pubdate FR" & _
"OM titles WHERE (title_id = @title_id)"
Me.SqlInsertCommand1.Connection = Me.SqlConnection1
Me.SqlInsertCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@title_id",
System.Data.SqlDbType.VarChar, 6, "title_id"))
Me.SqlInsertCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@title", System.Data.SqlDbType.VarChar,
80, "title"))
Me.SqlInsertCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@price", System.Data.SqlDbType.Money, 8,
"price"))
Me.SqlInsertCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@notes", System.Data.SqlDbType.VarChar,
200, "notes"))
Me.SqlInsertCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@pubdate",
System.Data.SqlDbType.DateTime, 8, "pubdate"))
'
'SqlSelectCommand1
'
Me.SqlSelectCommand1.CommandText = "SELECT title_id, title, price, notes,
pubdate FROM titles"
Me.SqlSelectCommand1.Connection = Me.SqlConnection1
'
'SqlUpdateCommand1
'
Me.SqlUpdateCommand1.CommandText = "UPDATE titles SET title_id = @title_id,
title = @title, price = @price, notes = @" & _
"notes, pubdate = @pubdate WHERE (title_id = @Original_title_id) AND (notes
= @Or" & _
"iginal_notes OR @Original_notes IS NULL AND notes IS NULL) AND (price =
@Origina" & _
"l_price OR @Original_price IS NULL AND price IS NULL) AND (pubdate =
@Original_p" & _
"ubdate) AND (title = @Original_title); SELECT title_id, title, price,
notes, pub" & _
"date FROM titles WHERE (title_id = @title_id)"
Me.SqlUpdateCommand1.Connection = Me.SqlConnection1
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@title_id",
System.Data.SqlDbType.VarChar, 6, "title_id"))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@title", System.Data.SqlDbType.VarChar,
80, "title"))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@price", System.Data.SqlDbType.Money, 8,
"price"))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@notes", System.Data.SqlDbType.VarChar,
200, "notes"))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@pubdate",
System.Data.SqlDbType.DateTime, 8, "pubdate"))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_title_id",
System.Data.SqlDbType.VarChar, 6, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "title_id",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_notes",
System.Data.SqlDbType.VarChar, 200, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "notes",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_price",
System.Data.SqlDbType.Money, 8, System.Data.ParameterDirection.Input, False,
CType(0, Byte), CType(0, Byte), "price",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_pubdate",
System.Data.SqlDbType.DateTime, 8, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "pubdate",
System.Data.DataRowVersion.Original, Nothing))
Me.SqlUpdateCommand1.Parameters.Add(New
System.Data.SqlClient.SqlParameter("@Original_title",
System.Data.SqlDbType.VarChar, 80, System.Data.ParameterDirection.Input,
False, CType(0, Byte), CType(0, Byte), "title",
System.Data.DataRowVersion.Original, Nothing))
End Sub
#End Region
Public Sub FillDataSet(ByVal dSet As MyDataSet)
SqlDataAdapter1.Fill(dSet)
End Sub
End Class

_____
DC G
 
M

Miha Markic

Hi,

Maybe data is not yet commited to database?
Maybe you are caching asp.net pages?
DataAdapter itself doesn't cache data.
 
D

DC Gringo

How would that be happening. I'm going directly into Enterprise Manager and
changing data on the pubs database table. As far as I know, the data is
committed immediately. Am I mistaken?

_____
DC G
 
M

Miha Markic

Hi DC,

I think that data is not commited until you step into next row.
Not sure on this though - you might check with the sql analyzer also to be
sure.
 

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