wpftreeview多选（WinFrom中怎么通过点击Button获取TreeView控件的值到另一个TreeView上，带checkBook、可多选）

本文目录

• WinFrom中怎么通过点击Button获取TreeView控件的值到另一个TreeView上，带checkBook、可多选
• C# treeview多选 查询数据库
• 我想知道在Winform中的TreeView控件，如何实现选中/取消选中父节点则自动选择/取消选中对应子节点谢谢给
• C#中treeview在 页面中怎么实现多选并且取值

WinFrom中怎么通过点击Button获取TreeView控件的值到另一个TreeView上，带checkBook、可多选

treeView1有个属性是CheckBoxesusing System;using System.Drawing;using System.Windows.Forms;public class Form1 : Form{ private TreeView treeView1; private Button showCheckedNodesButton; private TreeViewCancelEventHandler checkForCheckedChildren; public Form1() { treeView1 = new TreeView(); showCheckedNodesButton = new Button(); checkForCheckedChildren = new TreeViewCancelEventHandler(CheckForCheckedChildrenHandler); this.SuspendLayout(); // Initialize treeView1. treeView1.Location = new Point(0, 25); treeView1.Size = new Size(292, 248); treeView1.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Bottom | AnchorStyles.Right; treeView1.CheckBoxes = true; // Add nodes to treeView1. TreeNode node; for (int x = 0; x 《 3; ++x) { // Add a root node. node = treeView1.Nodes.Add(String.Format("Node{0}", x*4)); for (int y = 1; y 《 4; ++y) { // Add a node as a child of the previously added node. node = node.Nodes.Add(String.Format("Node{0}", x*4 + y)); } } // Set the checked state of one of the nodes to // demonstrate the showCheckedNodesButton button behavior. treeView1.Nodes.Checked = true; // Initialize showCheckedNodesButton. showCheckedNodesButton.Size = new Size(144, 24); showCheckedNodesButton.Text = "Show Checked Nodes"; showCheckedNodesButton.Click += new EventHandler(showCheckedNodesButton_Click); // Initialize the form. this.ClientSize = new Size(292, 273); this.Controls.AddRange(new Control { showCheckedNodesButton, treeView1 } ); this.ResumeLayout(false); } static void Main() { Application.Run(new Form1()); } private void showCheckedNodesButton_Click(object sender, EventArgs e) { // Disable redrawing of treeView1 to prevent flickering // while changes are made. treeView1.BeginUpdate(); // Collapse all nodes of treeView1. treeView1.CollapseAll(); // Add the checkForCheckedChildren event handler to the BeforeExpand event. treeView1.BeforeExpand += checkForCheckedChildren; // Expand all nodes of treeView1. Nodes without checked children are // prevented from expanding by the checkForCheckedChildren event handler. treeView1.ExpandAll(); // Remove the checkForCheckedChildren event handler from the BeforeExpand // event so manual node expansion will work correctly. treeView1.BeforeExpand -= checkForCheckedChildren; // Enable redrawing of treeView1. treeView1.EndUpdate(); } // Prevent expansion of a node that does not have any checked child nodes. private void CheckForCheckedChildrenHandler(object sender, TreeViewCancelEventArgs e) { if (!HasCheckedChildNodes(e.Node)) e.Cancel = true; } // Returns a value indicating whether the specified // TreeNode has checked child nodes. private bool HasCheckedChildNodes(TreeNode node) { if (node.Nodes.Count == 0) return false; foreach (TreeNode childNode in node.Nodes) { if (childNode.Checked) return true; // Recursively check the children of the current child node. if (HasCheckedChildNodes(childNode)) return true; } return false; }}

C# treeview多选 查询数据库

这个我做过，你选择多选之后，把你选择的ID保存到一个list集合中，然后在查询这些数据的时候，把list存的数据转化一下，例如：里面存的是liat.add(1),liat.add(2); 你把这个循环取出来拼接成查询的条件，例如 id in (1,2)就可以查询出来了

我想知道在Winform中的TreeView控件，如何实现选中/取消选中父节点则自动选择/取消选中对应子节点谢谢给

你可以用两个递归来设置子节点和父节点的状态，如下 private void CheckChild(TreeNode node) { if (node.Nodes.Count != 0) { foreach (TreeNode item in node.Nodes) { item.Checked = node.Checked; CheckChild(item); } } } private void CheckParent(TreeNode node) { if (node.Parent != null) { int count = 0; foreach (TreeNode item in node.Parent.Nodes) { if (item.Checked) { count++; } } node.Parent.Checked = (count == node.Parent.Nodes.Count); CheckParent(node.Parent); } } private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) { CheckChild(e.Node); CheckParent(e.Node); }

C#中treeview在 页面中怎么实现多选并且取值

可以一次获取选中的节点 如果不行，每个节点加一个checkbox 判断选中状态 来确定多选，如果选中获取值