Managing the "new record" datagridview line by code

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I have a datagridview with "allow users to add new rows". It's binded to a database. The second column in this datagridview is readonly and when the user enter in this cell I show a treeview. (I assign the size and location of treeview to the size and location of the cell. When select a node into the treeview I fill the cell in the datagrid with the node name of the treeview.(I hope you can understand me, first of all sorry by my horrible english). It's more, I just start with C#, I am a total newbie)

Well, it,s work fine except when I do this operation in the row "new record" (the last row with the asterisk. Just in this row the treeview appears but when I click into the treeview it doesn't fill the last cell, and the treeview goes to the row before.
I tried to open a new row in differents events (Cell enter, cell click, DefaultValuesNeed) but I can't get it to work the way I want.
So, I appreciate all kinds of ideas.
Thanks in advance and best regards.

What I have tried:

I tried to open a new row in differents events (Cell enter, cell click, DefaultValuesNeed) but I can't get it to work the way I want

Posted 14-Nov-20 6:42am

Member 14945943

Updated 14-Nov-20 22:19pm

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Gerry Schmitz · Answer 1 · 2020-11-14T22:19:00

Solution 1

All this would be easier if you used a "form" to add a new record: more control.

Since you have it working in "edit" mode, I suggest that when the user wants to "add a new record", you add it immediately (to the grid) with defaults, flag it as "in progress", and go into edit mode.

If the record turns out to be invalid, delete it (from the grid).

Understand this is just happening in the grid; you're not doing any "posting" to the DB until the "new" row has been validated / accepted.

Posted 14-Nov-20 22:19pm

Gerry Schmitz

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Member 14945943 15-Nov-20 6:36am

Hi Gerry, I have already tried to create a empty record (with values depending on column format) when the user click over the row corresponding to a new record, but it is not so easy: As the table in the datagridview is binded, it is not possible to add records easily. I can do it in the DefaultValuesNeeded event, but to my surprise it adds two new rows (amazing but true).
In any case, thanks for trying to help me.