79 lines
2.7 KiB
C#
79 lines
2.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace UserControls
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{
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public partial class MultiIntegerTextBox : TextBox
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{
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// Variables
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private const int WM_PASTE = 0x0302;
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private string[] separator = new string[] { " ", ",", ";", "\t", Environment.NewLine };
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// Properties
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public int[] Values { get { return ValuesFromString(this.Text); } }
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// Constructors
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public MultiIntegerTextBox()
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{
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InitializeComponent();
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}
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// Methods
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private int[] ValuesFromString(string text)
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{
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try
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{
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string[] tmp = text.Split(separator, StringSplitOptions.RemoveEmptyEntries);
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if (tmp.Length == 0) return null;
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//
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int[] values = new int[tmp.Length];
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for (int i = 0; i < tmp.Length; i++) values[i] = int.Parse(tmp[i]);
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return values;
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}
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catch
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{
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return null;
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}
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}
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protected override void WndProc(ref Message m)
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{
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if (m.Msg != WM_PASTE)
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{
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// Handle all other messages normally
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base.WndProc(ref m);
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}
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else
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{
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// Some simplified example code that complete replaces the
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// text box content only if the clipboard contains a valid double.
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// I'll leave improvement of this behavior as an exercise :)
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if (ValuesFromString(Clipboard.GetText()) != null)
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{
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Text = Clipboard.GetText();
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}
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}
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}
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private void NumTextBox_KeyPress(object sender, KeyPressEventArgs e)
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{
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if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
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{
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if (!(e.KeyChar == ' ' || e.KeyChar == ',' || e.KeyChar == ';'))
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{
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// Cancel key press
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e.Handled = true;
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}
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}
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}
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}
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}
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