65 lines
1.3 KiB
C#
65 lines
1.3 KiB
C#
using Components.Exceptions;
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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.Data;
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using System.Drawing;
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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 Components
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{
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public partial class CustomTextBox : UserControl
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{
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public event EventHandler ValueChanged;
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public CustomTextBox()
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{
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InitializeComponent();
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checkBoxNull.CheckedChanged += CheckBoxNull_CheckedChanged;
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textBoxInteger.TextChanged += TextBoxInteger_TextChanged;
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}
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public int? Value
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{
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get
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{
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if (checkBoxNull.Checked)
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{
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return null;
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}
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else
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{
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if (int.TryParse(textBoxInteger.Text, out int result))
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{
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return result;
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}
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else
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{
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throw new NotIntegerException("Ожидается целое число.");
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}
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}
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}
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set
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{
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checkBoxNull.Checked = !value.HasValue;
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textBoxInteger.Text = value.HasValue ? value.ToString() : string.Empty;
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}
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}
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private void TextBoxInteger_TextChanged(object sender, EventArgs e)
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{
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ValueChanged?.Invoke(this, e);
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}
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private void CheckBoxNull_CheckedChanged(object sender, EventArgs e)
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{
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textBoxInteger.Enabled = !checkBoxNull.Checked;
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ValueChanged?.Invoke(this, e);
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}
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}
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}
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