composite control: how to assign initial values to child controls?

[Ralf Müller]

Hi all,

I've got a question concerning composite controls:
As you can see, in my CreateChildControls method I have two custom child
controls, each of them using a model. This model should be assigned to those
controls only once in their lifetime since they keep it in their viewstate.
But how am I supposed to achieve this when CreateChildControls is strangely
invoked on each postback and therefore the initial values are reassigned
overwriting the values saved in ViewState (although I am not touching
ChildControlsCreated and my code in the parent control is not containing any
call to EnsureChildControls() - the code in the child controls does contain
those calls but they should only affect controls further down the tree,
shouldn't they?)?
Where should I assign initial values to my child controls since every method
apart from CreateChildControls which is called randomly seems to be called
at least once per postback?

protected override void CreateChildControls() {
Controls.Clear();

tvNavigationTree = new TreeView();
tvNavigationTree.Model = new NavigationTreeModel(Pool.GetHome());

lbDocumentList = new ListBox();
lbDocumentList.Model = new DocumentListModel();

TableRow row;
TableCell cell;
tblLayout = new Table();

row = new TableRow();
cell = new TableCell();
cell.Controls.Add(tvNavigationTree);
row.Cells.Add(cell);
cell = new TableCell();
cell.Controls.Add(lbDocumentList);
row.Cells.Add(cell);
tblLayout.Rows.Add(row);

Controls.Add(tblLayout);
}


Greetings, Ralf

 

[Nicole Schenk]

Hi all,

I've got a question concerning composite controls:
As you can see, in my CreateChildControls method I have two custom child
controls, each of them using a model. This model should be assigned to
those controls only once in their lifetime since they keep it in their
viewstate. But how am I supposed to achieve this when CreateChildControls
is strangely invoked on each postback and therefore the initial values are
reassigned overwriting the values saved in ViewState (although I am not
touching ChildControlsCreated and my code in the parent control is not
containing any call to EnsureChildControls() - the code in the child
controls does contain those calls but they should only affect controls
further down the tree, shouldn't they?)?
Where should I assign initial values to my child controls since every
method apart from CreateChildControls which is called randomly seems to be
called at least once per postback?

protected override void CreateChildControls() {
Controls.Clear();

tvNavigationTree = new TreeView();
tvNavigationTree.Model = new NavigationTreeModel(Pool.GetHome());

lbDocumentList = new ListBox();
lbDocumentList.Model = new DocumentListModel();

TableRow row;
TableCell cell;
tblLayout = new Table();

row = new TableRow();
cell = new TableCell();
cell.Controls.Add(tvNavigationTree);
row.Cells.Add(cell);
cell = new TableCell();
cell.Controls.Add(lbDocumentList);
row.Cells.Add(cell);
tblLayout.Rows.Add(row);

Controls.Add(tblLayout);
}


Greetings, Ralf

Try
http://www.dotnet247/com/247/reference/a.aspx?u=http://aspalliance.com/359

 

[John Saunders]

....

Try
http://www.dotnet247/com/247/reference/a.aspx?u=http://aspalliance.com/359

Bad URL.

John Saunders

 

[Ralf Müller]

I'm afraid John is right...

Try
http://www.dotnet247/com/247/reference/a.aspx?u=http://aspalliance.com/359

 

[Ralf Müller]

Here's the correct URL if anyone else is interested:
http://www.dotnet247.com/247reference/a.aspx?u=http://aspalliance.com/359

Greetings, Ralf

 

[Nicole Schenk]

... http://www.dotnet247/com/247/reference/a.aspx?u=http://aspalliance.com/359

Bad URL.

John Saunders

it is .com