Windows Forms

Rhyde Marsh wrote:

not sure what you mean swallow,

Rhyde Marsh wrote:

the data is updated but there seems to be a problem when it returns to the UI

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Rhyde Marsh wrote:

nullrefference exception

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srinandan.. wrote:

Help really appreciated.

srinandan.. wrote:

It allows user to input 100.99%

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Member 11059799 wrote:

nyone have a sample project

Quote:

Are you saying you don't know how to handle text input, and use the content to change the focus of your TreeView?

Quote:

Hi Hawk73ku,

According to your description, you'd like to find the specified treenode from the TreeView.

I wrote a sample for you, Here are my steps.

Step1: create a form with a textbox, a button and a treeview.

Step2: set the button click event handler like this.
List<treenode> tnlist = new List<treenode>();//collect the result nodes
int count = -1;//used to record the index of the selectnode

private void button1_Click(object sender, EventArgs e)
{
this.treeView1.Focus();
tnlist.Clear();
this.getallTreeNode(this.treeView1.Nodes, tnlist);
if (tnlist != null && tnlist.Count > 0)
{
count++;
if (count >= tnlist.Count)
{
count = 0;
}
this.treeView1.SelectedNode = tnlist[count];
}
}
private void getallTreeNode(TreeNodeCollection nodes, List<treenode> ltn)
{
foreach (TreeNode tn in nodes)
{
if (tn.Text.ToLower().Contains(this.textBox1.Text.ToLower()))
{
ltn.Add(tn);
}
if (tn.Nodes.Count > 0)
getallTreeNode(tn.Nodes, ltn);
}
}



the getallTreeNode method in my code is used to collect the result treenodes to a list.

Results:



#TreeNode Class
http://msdn.microsoft.com/en-us/library/system.windows.forms.treenode(v=vs.110).aspx

If you have any other concern regarding this issue, please feel free to let me know.

Best regards,

Youjun Tang

Quote:

New to VS C# and inherited a partially developed C# Winform project. Need some guidance.

Member 11059799 wrote:

It's very presumptuous of you to think

Member 11059799 wrote:

If yes how is it done in VS C#?

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If you can't read my code, try converting it here[^]

Member 11059799 wrote:

Not only is there nothing close but nothing near the planet

1. Nodes.Find[^]
   
2. Looping all nodes yourself (recursively!) and checking it (will be harder if the tree lazyloads, and should ideally be done on the datasource, not the tree itself)
   

Member 11059799 wrote:

In any event it doesn't look like it contains an example of user text input to
scroll the Tree display.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

static class Program
{
    static void Main()
    {
        using (var f = new Form())
        {
            var tb = new TextBox() { Dock = DockStyle.Top };
            var tv = new TreeView() { Dock = DockStyle.Fill };
            f.Controls.AddRange(new Control[] { tv, tb });

            tv.Nodes.Add("one", "one").Nodes.Add("two", "two");
            tv.Nodes.Add("three", "tree").Nodes.Add("nine", "nine");
            tv.Nodes.Add("tree", "three").Nodes.Add("oak", "oak");

            tb.KeyDown += (o, a) =>
                {
                    a.Handled = a.KeyCode == Keys.Return;
                    if (a.Handled)
                    {
                        TreeNode[] foundNodes = tv.Nodes.Find(tb.Text, true);
                        if (foundNodes.Length > 0)
                        {
                            tv.SelectedNode = foundNodes[0];
                            tv.Focus();
                        }
                    }
                };
            f.ShowDialog();
        }
    }
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]