Question

TableAdapter won't pull correct data for update method

Asked by: imateyelectronics

I am working on an asp.net application that will allow my company to pick an item from a datagrid, and then print the list of items selected out with there corresponding locations within our warehouse.  I took the approach of programming this like a shopping cart in that a clerk can search for an item and it's locations are displayed in one gridview, if they select a particular row, it's contents are added to another gridview.  The problem I am having is that I can't seem to update this second gridview, which is the Editable GridView on Matt Dotson's MSDN blog.  The update method I call works correctly but it doesn't recognize that I've changed the data in the Textbox.

Example is if the default quantity was 0 and I change it to 12 in the textbox, once I push the update button it updates with the quantity as 0 and not 12.  I have verified this much by stepping through code within the debugger.

protected void GridViewPickList_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            //Declare the TableAdapter so we can update our DataTable
            IntraDataTableAdapters.VP_Atlanta_WarehouseLocationsTableAdapter WarehouseAdapter = new global::Intranet.IntraDataTableAdapters.VP_Atlanta_WarehouseLocationsTableAdapter();
            IntraData._VP_Atlanta_WarehouseLocationsDataTable WarehouseDT = new IntraData._VP_Atlanta_WarehouseLocationsDataTable();
 
            //Pull our Existing DataTable from the SessioinState
            PickListDT = (DataTable)Session["PickList"];
 
            foreach (DataRow PickListRow in PickListDT.Rows)
            {
                //Validate Data and Controls
                //this.Validate();
                //This is a little hack to get our rows to have an Unchanged RowState
                PickListRow.AcceptChanges();
                PickListRow.SetModified();
 
                //Finally Update The database.
                try
                {
                    WarehouseAdapter.Update(PickListRow);
                }
                catch (Exception except)
                {
 
                    LabelMessageInfo.Text = except.ToString();
                }
 
                //PickListDT.AcceptChanges();
 
                //Session["PickList"] = PickListDT;
            }
 
            GridViewPickList.DataSource = PickListDT;
            GridViewPickList.DataBind();
 
            //WarehouseAdapter.FillWarehouseLocation(WarehouseDT);
            //LocationGridView.DataSource = WarehouseDT;
            //LocationGridView.DataBind();
            //UpdatePanelDataGrid.Update();
        }

                                  
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Asked On
2008-06-28 at 16:52:23ID23524437
Topics

C# Programming Language

,

Programming for ASP.NET

,

.NET

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: anuragalPosted on 2008-06-28 at 21:02:15ID: 21892906

You can not call AcceptChanges() before calling Update() as after calling AcceptChanges the update will not have any changes to update back to database.
What acceptchanges do is it make all the changes baseline and puts the delta (Changes) to nothing. So once you update the delta back to database then only you should call acceptchanges.

Also where you have specified the Update command for the DataAdaptor??

Anurag

 

by: coldboyPosted on 2008-06-28 at 23:26:56ID: 21893118

You should let us have a look at how do you write your asp.net code. I want to see how your textbox (that wouldn't update it's value on post back) created.

 

by: imateyelectronicsPosted on 2008-06-29 at 04:02:02ID: 21893520

Thanks for the replies.  It's not a textbox but a textbox within a gridview that's giving me these problems. The update command is the standard update command used by a table adapter created in a dataset.  You were dead on Anu.  I called the AcceptChanges in a different method to get the modified flag on my rows and it works perfectly.

20120131-EE-VQP-002

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