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One of my goals for using the Data Adpater is specifically for checking for optimistic concurrency. I admit that I had a little bit of trouble following the example on your site (due to my lack of experience). "Rich" wrote: Dim da As New Sql Data Adapter("Select * from tbl1", conn) dim tblx As New Data Table da. In my idea is there nothing wrong with the commandbuilder for simple updates of one table. The dataadapter checks if everything is still the same to the original rows which are still in your dataset before you do acceptchanges or that the dataadapter does that acceptchanges. One of my goals for using the Data Adpater is specifically for checking for optimistic concurrency. I admit that I had a little bit of trouble following the example on your site (due to my lack of experience).

I looked at your website, but I came up with another method using data Row. I have been reading several columns/articles that advise against using the command Builder. Now I can see the update in the client app as well as the sql server. I have seen too, that some of those who wrote that in past are now advising the commandbuilder. The Select reads the database confirm the keys as are in your dataset. You can see those original rows by writing an dataset with changes to disk using ds.write XML("path", xmlwritemode.diffgram) I hope to makes it something more clear. I looked at your website, but I came up with another method using data Row. I have been reading several columns/articles that advise against using the command Builder.

You can easily update a database from a Data Grid View. Step 4See the properties of the Adapter on Data Set, whether it has a query for updating or not. Step 5A line is automatically generated, when you bind the Data Grid View to the dataset.

Step 1Create a Windows Forms Application Project, and place a Data Grid View on the form. As: Points of Interest You can insert a row and click the update button; a row in the database will be inserted.

But when I was trying to use the Adapter - I was not updating tblx which is what updates tbl1 on the sql server. "Cor Ligthert [MVP]" wrote: Rich, I have seen those messages about the commandbuilder as well. Add(New Sql Parameter("@Original_Auto Id", Sql Db Type. Input, False, nb, nb, _ "Auto Id", Data Row Version. Original, Nothing)) ' What you see is that there is a Update and a Select in it.

Add(New Sql Parameter("@p1, Sql DBtype.varchar, 10, "fld1") Dim dr As Data Row = tblx. Update(tblx) '--now I can see the update in tblx/tbl1 the example using cmd was only updating tbl1 on the sql server. Update(tblx) '--tblx/tbl1 not getting updated here. But if I do this---then it works OK (not using data Adapter though) Dim cmd As New Sql Command cmd. May I ask what the Select statement in the Update Command performs? Add(New Sql Parameter("@Original_What Ever", _ Sql Db Type. Input, False, nb, nb, _ "What Ever", Data Row Version.

What I did was to assign a datarow object to the row I wanted to update and Parameters to the Update Command and modified the commandtext to use parameters. But for the code about concurrency checking focus your eyes only on that update command that is in the sample on our website.

dim cmb as new SQLCommand Builder(da) I hope this helps, Cor "Rich" I think I figured this out (because I finally got it to work). This is not a guarantee of course that there cannot be something wrong.

Thanks, Rich Rich, Your update command is incomplete, with a dataadapter you normally test if there is no problem with the optimistic concurrency. Have a look at this most simple sample on our website. ...2-d7c12bbb3726 If you have a simple update as this mostly the commandbuilder makes your life much easier. Like the designer it can only use one not joined table with a primary key and hold a maximum of 100 fields.

Update(tblx) '--tblx/tbl1 not getting updated here. But if I do this---then it works OK (not using data Adapter though) Dim cmd As New Sql Command cmd.

Command Text = "Update tbl1 set fld1 = 'test' where ID = 1" da.

"Rich" wrote: Dim da As New Sql Data Adapter("Select * from tbl1", conn) dim tblx As New Data Table da. In my idea is there nothing wrong with the commandbuilder for simple updates of one table. The dataadapter checks if everything is still the same to the original rows which are still in your dataset before you do acceptchanges or that the dataadapter does that acceptchanges.

Now I can see the update in the client app as well as the sql server. I have seen too, that some of those who wrote that in past are now advising the commandbuilder. The Select reads the database confirm the keys as are in your dataset. You can see those original rows by writing an dataset with changes to disk using ds.write XML("path", xmlwritemode.diffgram) I hope to makes it something more clear.




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