本文实例讲述了C#中TreeView实现适合两级节点的选中节点方法。分享给大家供大家参考。具体如下：
class TreeViewChecked
{
bool isfirst = true ;
public TreeViewChecked(TreeView treeView)
{
treeView.AfterCheck += new TreeViewEventHandler(treeView_AfterCheck);
treeView.AfterSelect += new TreeViewEventHandler(treeView_AfterSelect);
}
/// <summary>
/// 点击文字，选中checkbox
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void treeView_AfterSelect( object sender, TreeViewEventArgs e)
{
if (e.Node.Checked)
e.Node.Checked = false ;
else
e.Node.Checked = true ;
if (isfirst)
{
isfirst = false ;
e.Node.TreeView.Nodes[0].Checked = false ;
}
}
/// <summary>
/// 选中子节点，勾选父节点，选中父节点，勾选子节点
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void treeView_AfterCheck( object sender, TreeViewEventArgs e)
{
CheckTreeNode(e.Node);
}
/// <summary>
/// 选中子节点，勾选父节点，选中父节点，勾选子节点
/// </summary>
/// <param name="node"></param>
private void CheckTreeNode(TreeNode node)
{
node.TreeView.AfterCheck -= new TreeViewEventHandler(treeView_AfterCheck);
//如果不等于null,说明选择的是子节点
if (node.Parent != null )
{
TreeNode parent = node.Parent as TreeNode;
//如果该节点是选中的
if (node.Checked)
{
//判断其父节点是否被选中，如果没有被选中则选中它
if (parent.Checked == false )
{
parent.Checked = true ;
}
}
else
{
bool ischecked = false ;
foreach (TreeNode child in parent.Nodes)
{
if (child.Checked)
{
ischecked = true ;
break ;
}
}
if (ischecked)
parent.Checked = true ;
else
parent.Checked = false ;
}
} //如果等于null，说明选择的是根节点
else
{
foreach (TreeNode child in node.Nodes)
{
child.Checked = node.Checked;
}
}
node.TreeView.AfterCheck += new TreeViewEventHandler(treeView_AfterCheck);
}
}
希望本文所述对大家的C#程序设计有所帮助。
dy("nrwz");
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