How to rename headers of dynamically created TreeView elements

Question

I'm new to TreeView in WPF: C #, and I'm teaching how to work with dynamically created TreeViewItems . Right now, my program allows the user to create dynamic TreeViewItems and then delete them. For my next step, I would like to program the ability to rename these dynamic elements. Theoretically, this process is pretty straightforward, however I don't know what to do with C # code.

First of all, I would like to outline my renaming process to show exactly where I need help.

• User right click on TreeViewItem
• A contextMenu crashes (DONE)
• The user clicks the "Rename ..." button and the (DONE) window opens.
• The name TreeViewItem is entered in the textBox (DONE)
• If the text in the textBox matches a header in the mainWindow TreeView , another window opens that allows the user to enter a new name for the TreeViewItem . (Incomplete)
• When the name is entered in a new window, the user clicks the button, and the element name changes to everything that was entered in the textBox . (Incomplete)

Here is my code for step 5, where the program should verify that the entered header exists in the TreeView . In areas where I'm not sure about the correct code, I have pseudo code.

 //ENTER - Select TreeViewItem, open enterName window private void button2_Click(object sender, RoutedEventArgs e) { //Query for Window1 var mainWindow = Application.Current.Windows .Cast<Window1>() .FirstOrDefault(window => window is Window1) as Window1; //If(textbox1.text == one of the treeViewItem headers) var newWindow = new EnterCartName(); newWindow.Show(); //else, //MessageBox.Show("Value entered does not match a current cart name"); //this.Close(); } 

For step 6, I understand how to add a TreeViewItem with a dynamically created header , but I'm not sure how to get and rename an existing one. This is my code:

 //ENTER - Change cart name private void button2_Click(object sender, RoutedEventArgs e) { this.Close(); //close Window //Query for Window1 var mainWindow = Application.Current.Windows .Cast<Window1>() .FirstOrDefault(window => window is Window1) as Window1; //mainWindow.treeViewItem.Header(TVI gotten from previous window) = textBox1.Text; } 

I think my main problem with TreeView dynamic assets is that I feel they are invisible to me. How should I work with them if I don’t know what they called, or how to use them correctly. If you know any guides or resources on this topic, feel free to share them.

Many thanks.

My final decision:

 //Now Global bool hasFoundMatch; //ENTER - Select cart, open enter name window private void button2_Click(object sender, RoutedEventArgs e) { string input, output; //Query for Window1 var mainWindow = Application.Current.Windows .Cast<Window1>() .FirstOrDefault(window => window is Window1) as Window1; //Get TreeViewItem from mainWindow TreeViewItem renameCart = mainWindow.cartTypes_TI; input = textBox1.Text; output = textBox2.Text; //Check if header exists hasFoundMatch = CheckItemHeader(renameCart.Items, input); //if header exists - set new header //Else - show message box if (hasFoundMatch == true) SetItemHeader(renameCart.Items, input, output); else MessageBox.Show("Value entered does not match a current cart name."); //close window this.Close(); } //Checks to see whether the user entered header exists private bool CheckItemHeader(ItemCollection treeViewItems, string input) { bool hasFoundMatch = false; for (int index = 0; index < treeViewItems.Count; index++) { TreeViewItem item = (TreeViewItem)treeViewItems[index]; string header = item.Header.ToString(); if(header == input) { hasFoundMatch = true; break; } else hasFoundMatch = false; } return hasFoundMatch; } //Changes the selected TVI header private void SetItemHeader(ItemCollection treeViewItems, string input, string output) { for (int index = 0; index < treeViewItems.Count; index++) { TreeViewItem item = (TreeViewItem)treeViewItems[index]; string header = item.Header.ToString(); if (header == input) { item.Header = output; break; } } } 

Answer 1

Well, setting up the header is as simple as:

 treeViewItem.Header = textBox1.Text; 

Finding this should look like finding if any TreeViewItem.Header matches the text presented in the TextBox :

 private void SetItemHeader(ItemCollection treeViewItems, string input, string output) { for (int index = 0; index < treeViewItems.Count; index++) { TreeViewItem item = (TreeViewItem)treeViewItems[index]; if (item.Header == input) { item.Header = output; return; } else if (item.Items.Count > 1) SetItemHeader(item.Items, input, output); } } 

UPDATE →>

You can use this method to check element headers ... if it returns true, you have a match:

 private bool CheckItemHeader(ItemCollection treeViewItems, string input) { for (int index = 0; index < treeViewItems.Count; index++) { TreeViewItem item = (TreeViewItem)treeViewItems[index]; if (item.Header == input) return true; else if (item.Items.Count > 1) return CheckItemHeader(item.Items, input); } return false; } 

You would use it like:

 bool hasFoundMatch = CheckItemHeader(treeView.Items, textInputToMatch); 

Then, when you have a value, to change the title to:

 SetItemHeader(treeView.Items, textInputToMatch, textToChangeHeaderTo);