问题
I got a treeview data loaded from a XML file. I want to perform a search when the user types something in the textbox. Is that the right way of doing it?? I just want to filter the data. Please show me some example.
The below code is not working.
textBox1.Enter += new EventHandler(txtSearch_TextChanged);
private void txtSearch_TextChanged(object sender, EventArgs e)
{
foreach (TreeNode node in this.treeView1.Nodes)
{
if (node.Text.ToUpper().Contains(this.textBox1.Text.ToUpper()))
{
treeView1.SelectedNode = node;
break;
}
}
回答1:
you need to register to the text changed event: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.textbox.textchanged.aspx
and for finding the specific node use:
treeView1.Nodes.Find()
mode details here: http://msdn.microsoft.com/en-us/library/system.windows.forms.treenodecollection.find
回答2:
I think another problem could be that the code you provided only looks at the top level of nodes. You would need to create a method that would recursively go through the node's child nodes until you find a match. Something like this:
private TreeNode FindNode(TreeNode node, string searchText)
{
TreeNode result = null;
if (node.Text == searchText)
{
result = node;
}
else
{
foreach(TreeNode child in node.Nodes)
{
result = FindNode(child, searchText);
if (result != null)
{
break;
}
}
}
return result;
}
回答3:
textBox1.Enter += new EventHandler(txtSearch_TextChanged);
private void txtSearch_TextChanged(object sender, EventArgs e)
{
foreach (TreeNode node in this.treeView1.Nodes)
{
if (node.Text.ToUpper().Contains(this.textBox1.Text.ToUpper()))
{
treeView1.Select(); // First give the focus to the treeview control,
//doing this, the control is able to show the selectednode.
treeView1.SelectedNode = node;
break;
}
}
来源：https://stackoverflow.com/questions/11084027/csearch-from-treeview