89 lines
2.1 KiB
C#
89 lines
2.1 KiB
C#
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 W4Gui
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{
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public partial class ListWithAddAndDel : UserControl
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{
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public ListWithAddAndDel()
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{
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InitializeComponent();
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}
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public string[] Items
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{
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get
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{
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int itmCnt = lst.Items.Count;
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string[] items = new string[itmCnt];
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for (int i = 0; i < itmCnt; i++)
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items[i] = lst.Items[i].ToString();
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return items;
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}
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}
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public void Clear()
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{
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lst.Items.Clear();
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}
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public void AddItem(string item)
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{
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if(item.Trim() != "")
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lst.Items.Add(item);
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}
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private void addBtn_Click(object sender, EventArgs e)
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{
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string val = newEntry.Text.Trim();
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AddItem(val);
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}
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private void delBtn_Click(object sender, EventArgs e)
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{
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int sel = lst.SelectedIndex;
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if (sel >= 0)
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lst.Items.RemoveAt(sel);
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}
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private void updateBtn_Click(object sender, EventArgs e)
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{
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int sel = lst.SelectedIndex;
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if(sel >= 0)
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lst.Items[sel] = newEntry.Text.Trim();
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}
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private void newEntry_KeyDown(object sender, KeyEventArgs e)
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{
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if(e.KeyData == Keys.Enter)
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{
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e.Handled = true;
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updateBtn_Click(sender, e);
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}
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}
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private void lst_KeyDown(object sender, KeyEventArgs e)
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{
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if(e.KeyData == Keys.Delete)
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{
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e.Handled = true;
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delBtn_Click(sender, e);
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}
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}
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private void lst_SelectedIndexChanged(object sender, EventArgs e)
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{
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if (lst.SelectedIndex >= 0)
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newEntry.Text = lst.Items[lst.SelectedIndex].ToString();
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}
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}
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}
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