C Treeview Add Node Issue

contextmenustrip1 is associated with treeview1, right-click on the node to add a child node, and right-click in an empty space to add the root node.

using system;

using ;

using ;

using ;

using ;

using ;

using ;

public partial class form1 : form

public form1()

initializecomponent();

true;private void treeview1_nodemouseclick(object sender, treenodemouseclickeventargs e)

if ( ==

flag = true;

bool flag = false;

private void Add nodestoolstripmenuitem click(object sender, eventargs e).

treenode tn = new treenode();

if (flag)

tn;flag = false;

tn;flag = false;

private void treeview1_afterlabeledit(object sender, nodelabelediteventargs e)

private void contextmenustrip1_opening(object sender, canceleventargs e)

if (!flag)

null;bool flag1 = false;

private void contextmenustrip1_itemclicked(object sender, toolstripitemclickedeventargs e)

flag1 = true;

private void contextmenustrip1_closed(object sender, toolstripdropdownclosedeventargs e)

if (!flag1)

flag = false;

elseflag1 = false;

1. Add the [TreeView] control on the interface and adjust it to the appropriate size.

2. Add other required controls to the program interface: including 2 input boxes for entering the number of parent nodes and the number of child nodes; Button to generate nodes, button to delete nodes, button to clear all nodes; A text box that outputs log information.

3. **, enter the ** of [Generate Node]; Obtain the number of child nodes and parent nodes, and use a loop to add parent nodes and child nodes.

4. [Clear all nodes].

5. ** for [Delete Selected Node].

6. Click the [TreeView] control, select the behavior in the properties, select [AfterSelect] from the behavior list and double-click, and on the ** page, add the node after it is selected**.

7. Enter the number of parent nodes and child nodes to 3 and 3 respectively to generate a tree structure. Confirm that the build is successful.

c should do this when treeview adds a child node to a specified name node:

First, you need to use treenode to define the node object.

Add to the selected one.

Add the index to the node that specifies the index.

The TreeView control is used to display a hierarchical view of information, similar to the directory of the explorer in Windows. Each piece of information in the treeview control has a node object associated with it.

TreeView displays a hierarchical directory structure of node objects, each consisting of a label object and its associated bitmap. After establishing the treeview control, we can collapse, show, or hide the nodes in it.

TreeView controls are typically used to display file and directory structures, class hierarchies in documents, hierarchies in indexes, and other information with a hierarchical directory structure.

Method steps.

1. Open Microsoft Visual Studio 2010 and create a new program named [TreeView].

2Add the [TreeView] control on the interface and adjust it to the appropriate size.

3. Add other required controls to the program interface: including, 2 input boxes for entering the number of parent nodes and the number of child nodes;

Button to generate nodes, button to delete nodes, button to clear all nodes;

A text box that outputs log information.

4**, enter ** for [Generate Node];

Obtain the number of child nodes and parent nodes, and use a loop to add parent nodes and child nodes.

5. Clear all nodes.

6. ** for [Delete Selected Node].

7. Click the [TreeView] control, select the behavior in the properties, select [afterselect] from the behavior list, double-click, and on the ** page, add the node after it is selected**.

8. ** of the output method of the output log.

9. Generate an exe file for testing.

10 input parent nodes and child nodes are 2 and 4 respectively, generating a tree structure. Confirm that the build is successful.

11Click Clear All Nodes, and you can see that all nodes have been cleared.

12. The number of parent and child nodes is 3 and 3 respectively, and the tree structure is generated. Confirm that the build is successful.

13. Click [Child Node 2] of [Parent Node 3] and click [Delete Node].

14 can see that the child node has been emptied. Then click Parent Node 2.

15. Click Delete Node, and you can see that the parent node has been cleared.

16When you click each node, you can see that the corresponding node information is entered in the log.