Posted 16 October 2019, 4:57 am ESTHello support!
We encountered a case where the DataTree ( https://www.grapecity.com/samples/datatree ) was a perfect fit, and it has worked well for the most part. However, my use-case requires me to set auto-incrementing string values whenever a new row is added (Think "Sample 1", "Sample 2", etc.). Since they're strings, I can't use the auto-increment feature of the DataTables bound to the DataTree. I have attached handlers to both the BeforeAddRow and AfterAddRow events, but they never seem to fire. Even when added as a custom override in the DataTree itself:
public void ShowChildLevel()
C1FlexDataTree parent = this;
int level = 0;
while (parent.Parent is C1FlexDataTree)
parent = parent.Parent as C1FlexDataTree;
if (level == 0)
MessageBox.Show("I am parent");
MessageBox.Show("I am child: " + level.ToString());
protected override void OnAfterAddRow(RowColEventArgs e)
neither event ever fires. I've overriden other events and can see them trigger breakpoints, so it's not something wrong with the overriding or attaching in themselves. I can't see anything in the DataTree that would be supressing these events, so I'm at a loss.
While testing the problem, I noticed that the AfterDragColumn event also doesn't fire in the general case, but does fire when the whole DataTree is selected. I don't need the AfterDragColumn event, but it may be a clue as to the cause.
I'm currently looking at ways to try and trigger the AddRow events manually using the events I know do fire, but I'd really prefer to use those events directly.