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SqlCommandBuilder question

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This message was discovered on ASPFriends.com 'ngfx-sqlclient' list.
Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions.

Bob Herrmann

-- Moved from [aspngdata] to [ngfx-sqlclient] by Sheik Yerbouti <Click here to reveal e-mail address> --

Hi all,

I recently copied a snippet of code from a .Net web site which helped me convert a XML file to SQL. The code does work as planned. I notice this code uses a feature which I have not used before, specifically the SqlCommandBuilder. I have listed the code below. This code does the INSERT into my SQL database. My question is the how the heck does it do this? I do not see where the INSERT command is used in the SqlCOmmandBuilder object. Can someone explain how this works so that I can understand it? I'd also like to know how this could be modified to use the UPDAT and DELETE commands.

Bob

Private Function InsertXMLIntoDatabase(ByVal ds As DataSet) As Boolean

Dim connStr As String = "server=abc;uid=sa;pwd=pass;database=BobMS"

Dim sql As String = "SELECT * FROM tabTopFolder"

Dim insertStatus As Boolean = True

Dim dataConn As New SqlConnection(connStr)

Dim da As New SqlDataAdapter(sql, dataConn)

Dim cb As New SqlCommandBuilder(da)

Try

da.Update(ds, "tabTopFolder")

Catch exp As Exception

Response.Write("<br> " & exp.Message)

insertStatus = False

Finally

If dataConn.State <> ConnectionState.Closed Then

dataConn.Close()

End If

End Try

Return insertStatus

End Function 'InsertXMLIntoDatabase

Reply to this message...

William \(Bill\) Vaughn (VIP)

The CommandBuilder class takes the SELECT statement from the DataAdapter
SelectCommand, parses it and makes a round trip to the server asking the
provider (and server) to describe the SQL. From that it congers the
UPDATE, INSERT and DELETE action queries and populates the DataAdapter
commands appropriately.

hth

William (Bill) Vaughn
Author, trainer, mentor
Microsoft Regional Director -- Pacific Northwest
Beta V Corporation
Redmond, Washington USA
www.betav.com
(425) 556-9205 (v/f)

-----Original Message-----
From: Bob Herrmann [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 6:56 AM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] SqlCommandBuilder question

-- Moved from [aspngdata] to [ngfx-sqlclient] by Sheik Yerbouti
<Click here to reveal e-mail address> --

Hi all,

I recently copied a snippet of code from a .Net web site which helped me
convert a XML file to SQL. The code does work as planned. I notice
this code uses a feature which I have not used before, specifically the
SqlCommandBuilder. I have listed the code below. This code does the
INSERT into my SQL database. My question is the how the heck does it do
this? I do not see where the INSERT command is used in the
SqlCOmmandBuilder object. Can someone explain how this works so that I
can understand it? I'd also like to know how this could be modified to
use the UPDAT and DELETE commands.

Bob

Private Function InsertXMLIntoDatabase(ByVal ds As DataSet) As Boolean

Dim connStr As String = "server=abc;uid=sa;pwd=pass;database=BobMS"

Dim sql As String = "SELECT * FROM tabTopFolder"

Dim insertStatus As Boolean = True

Dim dataConn As New SqlConnection(connStr)

Dim da As New SqlDataAdapter(sql, dataConn)

Dim cb As New SqlCommandBuilder(da)

Try

da.Update(ds, "tabTopFolder")

Catch exp As Exception

Response.Write("<br> " & exp.Message)

insertStatus = False

Finally

If dataConn.State <> ConnectionState.Closed Then

dataConn.Close()

End If

End Try

Return insertStatus

End Function 'InsertXMLIntoDatabase
| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

Reply to this message...

Dan Wahlin

Also...it's quite convenient to use in some circumstances (and I'll use
it for more simple apps) but due to the round trip Bill mentioned it's
not as efficient as defining everything yourself. I saw a presentation
at Tech Ed by Michael Pizzo (Microsoft ADO.NET software architect) and
he basically said that if you want to maximize your performance don't
use it (which of course makes sense based upon Bill's statement).

Dan

Wahlin Consulting LLC
Microsoft MVP - ASP.NET
http://www.XMLforASP.NET
XML for ASP.NET Developers by Dan Wahlin in bookstores everywhere!

-----Original Message-----
From: William (Bill) Vaughn [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 12:36 PM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] RE: SqlCommandBuilder question

The CommandBuilder class takes the SELECT statement from the DataAdapter
SelectCommand, parses it and makes a round trip to the server asking the
provider (and server) to describe the SQL. From that it congers the
UPDATE, INSERT and DELETE action queries and populates the DataAdapter
commands appropriately.

hth

William (Bill) Vaughn
Author, trainer, mentor
Microsoft Regional Director -- Pacific Northwest
Beta V Corporation
Redmond, Washington USA
www.betav.com
(425) 556-9205 (v/f)

-----Original Message-----
From: Bob Herrmann [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 6:56 AM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] SqlCommandBuilder question

-- Moved from [aspngdata] to [ngfx-sqlclient] by Sheik Yerbouti
<Click here to reveal e-mail address> --

Hi all,

I recently copied a snippet of code from a .Net web site which helped me
convert a XML file to SQL. The code does work as planned. I notice
this code uses a feature which I have not used before, specifically the
SqlCommandBuilder. I have listed the code below. This code does the
INSERT into my SQL database. My question is the how the heck does it do
this? I do not see where the INSERT command is used in the
SqlCOmmandBuilder object. Can someone explain how this works so that I
can understand it? I'd also like to know how this could be modified to
use the UPDAT and DELETE commands.

Bob

Private Function InsertXMLIntoDatabase(ByVal ds As DataSet) As Boolean

Dim connStr As String = "server=abc;uid=sa;pwd=pass;database=BobMS"

Dim sql As String = "SELECT * FROM tabTopFolder"

Dim insertStatus As Boolean = True

Dim dataConn As New SqlConnection(connStr)

Dim da As New SqlDataAdapter(sql, dataConn)

Dim cb As New SqlCommandBuilder(da)

Try

da.Update(ds, "tabTopFolder")

Catch exp As Exception

Response.Write("<br> " & exp.Message)

insertStatus = False

Finally

If dataConn.State <> ConnectionState.Closed Then

dataConn.Close()

End If

End Try

Return insertStatus

End Function 'InsertXMLIntoDatabase
| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

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Reply to this message...

William \(Bill\) Vaughn (VIP)

It also is kinda dumb. The SQL it generates is pretty simplistic and
does not address a number of issues including Update Criteria (as set in
ADO classic), limiting the columns to update (it updates all columns),
using TimeStamps (they are ignored), returning the Identity... and more.

William (Bill) Vaughn
Author, trainer, mentor
Microsoft Regional Director -- Pacific Northwest
Beta V Corporation
Redmond, Washington USA
www.betav.com
(425) 556-9205 (v/f)

-----Original Message-----
From: Dan Wahlin [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 12:46 PM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] RE: SqlCommandBuilder question

Also...it's quite convenient to use in some circumstances (and I'll use
it for more simple apps) but due to the round trip Bill mentioned it's
not as efficient as defining everything yourself. I saw a presentation
at Tech Ed by Michael Pizzo (Microsoft ADO.NET software architect) and
he basically said that if you want to maximize your performance don't
use it (which of course makes sense based upon Bill's statement).

Dan

Wahlin Consulting LLC
Microsoft MVP - ASP.NET
http://www.XMLforASP.NET
XML for ASP.NET Developers by Dan Wahlin in bookstores everywhere!

-----Original Message-----
From: William (Bill) Vaughn [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 12:36 PM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] RE: SqlCommandBuilder question

The CommandBuilder class takes the SELECT statement from the DataAdapter
SelectCommand, parses it and makes a round trip to the server asking the
provider (and server) to describe the SQL. From that it congers the
UPDATE, INSERT and DELETE action queries and populates the DataAdapter
commands appropriately.

hth

William (Bill) Vaughn
Author, trainer, mentor
Microsoft Regional Director -- Pacific Northwest
Beta V Corporation
Redmond, Washington USA
www.betav.com
(425) 556-9205 (v/f)

-----Original Message-----
From: Bob Herrmann [mailto:Click here to reveal e-mail address]
Sent: Friday, July 26, 2002 6:56 AM
To: ngfx-sqlclient
Subject: [ngfx-sqlclient] SqlCommandBuilder question

-- Moved from [aspngdata] to [ngfx-sqlclient] by Sheik Yerbouti
<Click here to reveal e-mail address> --

Hi all,

I recently copied a snippet of code from a .Net web site which helped me
convert a XML file to SQL. The code does work as planned. I notice
this code uses a feature which I have not used before, specifically the
SqlCommandBuilder. I have listed the code below. This code does the
INSERT into my SQL database. My question is the how the heck does it do
this? I do not see where the INSERT command is used in the
SqlCOmmandBuilder object. Can someone explain how this works so that I
can understand it? I'd also like to know how this could be modified to
use the UPDAT and DELETE commands.

Bob

Private Function InsertXMLIntoDatabase(ByVal ds As DataSet) As Boolean

Dim connStr As String = "server=abc;uid=sa;pwd=pass;database=BobMS"

Dim sql As String = "SELECT * FROM tabTopFolder"

Dim insertStatus As Boolean = True

Dim dataConn As New SqlConnection(connStr)

Dim da As New SqlDataAdapter(sql, dataConn)

Dim cb As New SqlCommandBuilder(da)

Try

da.Update(ds, "tabTopFolder")

Catch exp As Exception

Response.Write("<br> " & exp.Message)

insertStatus = False

Finally

If dataConn.State <> ConnectionState.Closed Then

dataConn.Close()

End If

End Try

Return insertStatus

End Function 'InsertXMLIntoDatabase
| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.377 / Virus Database: 211 - Release Date: 07/15/2002

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.377 / Virus Database: 211 - Release Date: 07/15/2002

| [ngfx-sqlclient] member Click here to reveal e-mail address = YOUR ID
| http://www.aspfriends.com/aspfriends/ngfx-sqlclient.asp = JOIN/QUIT

Reply to this message...

	System.Data.Common.DataAdapter
	System.Data.ConnectionState
	System.Data.DataSet
	System.Data.SqlClient.SqlCommandBuilder
	System.Data.SqlClient.SqlConnection
	System.Data.SqlClient.SqlDataAdapter

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