Question

我有两个树视图和一个带有添加节点功能的contexmenucontainer cmnuAddNode是我的contexmenuestrip的添加选项卡我是一个与事件合作的新手

如果点击，我想将节点添加到树视图1 如果单击，则将节点添加到treeview2 我只是想知道在if条件下我应该写什么我的代码如下：

 private void cmnuAddNode_Click(object sender, EventArgs e)
    {

        NewNode n = new NewNode();
        n.ShowDialog();
        TreeNode nod = new TreeNode();
        nod.Name = n.NewNodeName.ToString();
        nod.Text = n.NewNodeText.ToString();

        n.Close();
      if (treeView1.SelectedNode!=null)
        {
            treeView1.SelectedNode.Nodes.Add(nod);
            treeView1.SelectedNode.ExpandAll();
        }
        if (treeView2.SelectedNode!= null)
        {
            treeView2.SelectedNode.Nodes.Add(nod);
            treeView2.SelectedNode.ExpandAll();
        }
          }

单击treeview2时，此代码有异常

Answer 1

private void cmnuAddNode_Click(object sender, EventArgs e,TreeViewEventArgs e1)
{

    NewNode n = new NewNode();
    n.ShowDialog();
    TreeNode nod = new TreeNode();
    nod.Name = n.NewNodeName.ToString();
    nod.Text = n.NewNodeText.ToString();

    n.Close();
    if(e1.Node.TreeView == treeView1)
   {
    treeView1.SelectedNode.Nodes.Add(nod);
    treeView1.SelectedNode.ExpandAll();
    }
     if(e1.Node.TreeView == treeView2)
   {
    treeView2.SelectedNode.Nodes.Add(nod);
    treeView2.SelectedNode.ExpandAll();
     }
}

Answer 2

首先为每个TreeView添加一个鼠标单击事件其次，使用MouseEventArgs选择正确的节点。 for treeview1（对treeview2做同样的事情）

    void treeView1MouseUp(object sender, MouseEventArgs e)
    {
        if(e.Button == MouseButtons.Right)
        {
            // Select the clicked node
            treeView1.SelectedNode = treeView1.GetNodeAt(e.X, e.Y);

            if(treeView1.SelectedNode != null)
            {
             cmnuAddNode.Show(treeView1, e.Location);
            }
        }
    }

//it will work for the two treeview getting Parent control of cmnuAddNode
private void cmnuAddNode_Click(object sender, EventArgs e,TreeViewEventArgs e1)
    {
        TreeView yourtreeView = (TreeView)cmnuAddNode.Parent;
        NewNode n = new NewNode();
        n.ShowDialog();
        TreeNode nod = new TreeNode();
        nod.Name = n.NewNodeName.ToString();
        nod.Text = n.NewNodeText.ToString();

        n.Close();

        yourtreeView.SelectedNode.Nodes.Add(nod);
        yourtreeView.SelectedNode.ExpandAll();

    }

Answer 3

简单我在我的树视图中获得了一个索引，当它在事件鼠标点击它的树视图1时我将它设置为1而当它转到2时我将其设置为2 所以在我的函数中添加我写的条件这简单，快速，简单

private void cmnuAddNode_Click(object sender, EventArgs e)
    {

        NewNode n = new NewNode();
        n.ShowDialog();
        TreeNode nod = new TreeNode();
        nod.Name = n.NewNodeName.ToString();
        nod.Text = n.NewNodeText.ToString();

        n.Close();

        if (treeviewindex== 1)
        {
            treeView1.SelectedNode.Nodes.Add(nod);
            treeView1.SelectedNode.ExpandAll();

        }
        if (treeviewindex==2)
        {
            treeView2.SelectedNode.Nodes.Add(nod);
            treeView2.SelectedNode.ExpandAll();
        }
        if (treeviewindex == 3)
        {
            treeView3.SelectedNode.Nodes.Add(nod);
            treeView3.SelectedNode.ExpandAll();
        }
    }

如何确定2次鼠标点击树视图

3 个答案: