Clearing of labels from a symbol

[James Brock]

Currently my application adds my custom symbol to the diagram from the palette. This symbol contains 2 labels which I added in Symbol Designer.

My goal is to add my own labels to the symbol when it has been added to the diagram. Currently I have had no joy so instead am trying to clear the existing labels. When the user clicks a button then the following code is invoked:

private void btnAddLabel_Click(object sender, System.EventArgs e)
{
DiagramForm frm = (DiagramForm)ActiveMdiChild;

foreach (Symbol sym in frm.Diagram.Model.Nodes)
{
foreach (Label lbl in sym.Labels)
MessageBox.Show(lbl.Text);
sym.Labels.Clear();
}

However, the labels are not removed from the screen. When I inspect the Labels property of the Symbol there are no labels.

Should I be calling another method to refresh the diagram? I have tried each of the following afterwards but to no avail.

frm.Diagram.Refresh();
frm.Diagram.View.Update():

Help appreciated.

Jimski

[Administrator]

Hi Jimski

You should use the Symbol''s Remove() or RemoveAt() Method to remove the labels from the symbol.

Here is a code snippet which demonstrates how you can remove labels of a custom symbol: MySymbol(s) in a Diagram:

//Remove Lables in MySymbol

foreach (MySymbol sym in this.diagram1.Model.Nodes)
{
for (int i=sym.Labels.Count-1; i>=0; i--)
{
sym.Labels.RemoveAt(i);
}
}
this.diagram1.Refresh();
}

Regards
Arun