read data from notepad

atchyut medarametla

I have a combo box, list box and two buttons(Add, Display).The need is getting data from notepad to combo box. When select item from the combo box and click the Add button it need to be saved and display the text when click the Display button. don't display the text when click the Add button.

6 Replies

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Vulpes13y ago
Accepted answer
It's much easier if you just want to read the data from a text file.

Assuming each item is on a separate line in the file try this:

// add this to using directives

using System.IO;

// add this code to form class

private string[] items;

private void btnAdd_Click(object sender, EventArgs e)
{
if (comboBox1.SelectedIndex > -1)
{
items = File.ReadAllLines("data.txt"); // use full path here
}
}

private void btnDisplay_Click(object sender, EventArgs e)
{
if (items != null && items.Length > 0)
{
foreach(string item in items)
{
comboBox1.Items.Add(item);
}

comboBox1.SelectedIndex = comboBox1.Items.Count - items.Length;
}
}
Vulpes13y ago
If you're loading the combobox from the file data in the Form_Load eventhandler, then the code for your button_Clicks will now become:

private string nextItem;

private void btnAdd_Click(object sender, EventArgs e)
{
if (comboBox1.SelectedIndex > -1 && textBox1.Text.Length > 0)
{
nextItem = comboBox1.SelectedItem.ToString() + " " + textBox1.Text);
}
}

private void btnDisplay_Click(object sender, EventArgs e)
{
if (nextItem != null)
{
listBox1.Items.Add(nextItem);
nextItem = null;
listBox1.SelectedIndex = listBox1.Items.Count - 1;
}
}
atchyut medarametla13y ago
I got one more doubt.
I have a text box along with combo box. when form loads data retrieve from notepad(I have the logic for this one which you gave above).
then I enter a value in text box and select a item in combo box and click add button they just need save but not show in the list box.
after when I click display button they need to be display along with the value in list box.
atchyut medarametla13y ago
Very much thankful to you
atchyut medarametla13y ago
Thank you for giving a reply.
actually I have a data.txt file in my folder and it contain some data jewellery, watch, picture, ornament, Electrical.
I need to retrieve those data into combo box.
can you explain about this?
Vulpes13y ago
Not sure that I'm entirely clear what's needed but try this:

// add these using directives

using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;

// add this code to your form class

[DllImport("user32.dll")]
static extern bool IsIconic(IntPtr hWnd);

[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);

private string notepadText;

private void btnAdd_Click(object sender, EventArgs e)
{
if (comboBox1.SelectedIndex > -1)
{
Process[] procs = Process.GetProcessesByName("notepad");
if (procs.Length > 0) // assume only one instance running
{
IntPtr hwnd = procs[0].MainWindowHandle;
if (IsIconic(hwnd)) ShowWindow(hwnd, 9); // if notepad minimized restore it
SetForegroundWindow(hwnd);
Thread.Sleep(500);
SendKeys.Send("%(EA)"); // select all text
Thread.Sleep(500);
SendKeys.Send("%(EC)"); // copy it to clipbaord
Thread.Sleep(500);
notepadText = Clipboard.GetText(); // retrieve text
}
}
}

private void btnDisplay_Click(object sender, EventArgs e)
{
if (!String.IsNullOrEmpty(notepadText))
{
comboBox1.Items.Add(notepadText);
comboBox1.SelectedIndex = comboBox1.Items.Count - 1;
}
}