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Adding new row to bound datatable

Posted on 2009-05-05
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Last Modified: 2012-05-06
Hi,

I have a datatable which is bound to a combobox and several textboxes.
The combobox is used to browse through the items, and the textboxes to modify/view the data.
This all works fine.

However, when adding a new row to the table, the combobox shows this new row, yet the bindingcontext does not change position when I select the value in the combobox. Therefore I cannot modify the new row added.

Any help would be apprciated,

Thanks.
The binding for example;
 
            medicinesTableAdapter1.Fill(mediupDataSet1.medicines);
 
            cboxSelect.DataSource = mediupDataSet1;
            cboxSelect.DisplayMember = "Medicines.english_name";
            cboxSelect.ValueMember = "Medicines.ID";
 
            tboxID.DataBindings.Add("Text", mediupDataSet1, "Medicines.ID");
            tboxActiveComponents.DataBindings.Add("Text", mediupDataSet1, "Medicines.active_component");
 
Adding a new row:
           
 this.BindingContext[mediupDataSet1, "Medicines"].EndCurrentEdit();
            DataRow _dr = mediupDataSet1.medicines.NewRow();
            _dr.BeginEdit();
            _dr["ID"] = (uint)(mediupDataSet1.medicines.Compute("Max(id)", "")) + 1;
            _dr["hebrew_name"] = "êèÕäÔ ×ÓéÔ";
            _dr.EndEdit();
            mediupDataSet1.medicines.Rows.Add(_dr);

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Question by:Nemesis_0001
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Expert Comment

by:Wardy_01
ID: 24305881
rebind the grid to the newly modified datatable.
then set the selectedindex to the newly created row.
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Author Comment

by:Nemesis_0001
ID: 24305899
There is no grid, only a combobox and some textboxes.
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Accepted Solution

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Wardy_01 earned 2000 total points
ID: 24373735
sorry my bad ... read it wrong.

If you design this as per the Microsoft recommended approach you should have all your databinding code in a databind method.

That means you do things in this order ...

1. load
2. databind
3  edit
4  databind
5  finish

you have to be careful with the order of events though, i used to get tripped up all the time with this stuff. Put a breakpoint on your value setting statements to make sure the new values are being correctly picked up.

And of course don't forget to call databind when you're done ... i can't see that anywhere.
Databind should update your binding context assuming your underlying dataset has been modified correctly.

Migth be worth checking the dataset after you modify it to make sure the data has been correctly committed.
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