C#

RugbyLeague wrote:

Why is it safer to pass startup arguments through the DoWorkEventArgs?

internal delaget int GetCurrentCount();
private int count = 100;

private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
  // Some code here
  int threadedCount = -1;
  // Now we want to return the value so...
  this.Invoke(new GetCurrentCount(delegate() { threadedCount = this.count; }));

  // Now threadedCount should equal 100
  // More code...
}

samidhas wrote:

how can i add a new node in treeview for an xml backend file? and save it?

// Create the new node. 
TreeNode newNode = new TreeNode();
newNode.Text = row["CategoryName"].ToString(); 
newNode.Value = row["CategoryID"].ToString();        

// Set the PopulateOnDemand property to true so that the child nodes can be 
// dynamically populated.
newNode.PopulateOnDemand = true;

// Set additional properties for the node.
newNode.SelectAction = TreeNodeSelectAction.Expand;

// Add the new node to the ChildNodes collection of the parent node.
node.ChildNodes.Add(newNode);