Access System.Windows.Forms component

[jonni]

Hi All,

What's the different between a treeView declared like:

this.treeView1 = new System.Windows.Forms.TreeView();

and a treeNode declared like:

System.Windows.Forms.TreeNode treeNode10 = new System.Windows.Forms.TreeNode("Rond 1");

I found out how to access the TreeNode:

TreeNode tn1 = this.treeView1.Nodes[0];

But why can I access a node declared like this in a different class than the form class:

System.Windows.Forms.TreeNode treeNode666 = new System.Windows.Forms.TreeNode("Kalle");
treeNode666.Text = "Stig";

But not in the form class where the node is declared in the Form1.Designer.cs class like this:

System.Windows.Forms.TreeNode treeNode10 = new System.Windows.Forms.TreeNode("Rond 1");

And I want to access the Node I as I did above:

treeNode10.Text = "Stig";

Why does it work in the other class, but in the form class where I get 'The name 'treeNode10' does not exist in the current context' error?


Regards

Jonni

[Harsh Gupta]

Are you sure?? It is working for me, no compiler error.

Please post the whole code you are using.

[jonni]

This code (in Form1.cs) works:

private void button4_Click(object sender, EventArgs e)
{
    TreeNode tn1 = this.treeView1.Nodes[0];
    logic1.changeTreeNode(ref tn1);
}

This code (in Form1.cs) DOESN'T work:

private void button4_Click(object sender, EventArgs e)
{
    TreeNode tn1 = treeNode10;
    logik1.ÄndraTräd(ref tn1);
}

Where treeNode10 is declared in Form1.Designer.cs:

System.Windows.Forms.TreeNode treeNode10 = new System.Windows.Forms.TreeNode("Rond 1");
this.treeView1 = new System.Windows.Forms.TreeView();
this.treeView1.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {treeNode10});

My main question is why is treeView declared as

this.treeView1 = new System.Windows.Forms.TreeView();

and treeNode10 declared as:

System.Windows.Forms.TreeNode treeNode10 = new System.Windows.Forms.TreeNode("Rond 1");

Both the treeView and the treeNode is added at designtime in designview.

/Jonni

[jonni]

Anyone?

/Jonni

[jmcilhinney]

This is NOT a declaration:

this.treeView1 = new System.Windows.Forms.TreeView();

treeNode10 is declared as a local variable, so it doesn't exist outside the method in which it's declared.