Winform Custom control (Automataic Commit)

最新推荐文章于 2020-05-31 15:56:10 发布

最新推荐文章于 2020-05-31 15:56:10 发布 · 144 阅读

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#WinForm #Windows

本文介绍了一个名为AutoCommitTextBox的自定义控件，该控件继承自TextBox，并添加了自动提交的功能。当用户输入文本达到一定长度或按下Enter键时，会触发提交事件。

2010-06-15 16:04:52

using System; using System.Collections.Generic; using System.Text; using System.Windows.Forms; using System.Timers; namespace GoldFinger.FrontEnd.GenericControl.Controls { public class AutoCommitTextBox : TextBox { public const int MIN_COMMIT_COUNT = 2; public const int AUTO_COMMIT_INTERVAL = 500; public delegate void CommitEventHandle(); public event CommitEventHandle CommitEvent; private System.Timers.Timer timer = new System.Timers.Timer(); private bool isCommit; public AutoCommitTextBox() : base() { timer.Interval = AUTO_COMMIT_INTERVAL; timer.Enabled = false; timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed); } protected override void OnTextChanged(EventArgs e) { base.OnTextChanged(e); // Auto commit for empty string as well if (this.Text.Length > 0 && this.Text.Length <= MIN_COMMIT_COUNT) return; timer.Enabled = false; timer.Enabled = true; isCommit = false; } private void timer_Elapsed(object sender, ElapsedEventArgs e) { if (!isCommit) { timer.Enabled = false; isCommit = true; CommitText(); } } protected override void OnKeyDown(KeyEventArgs e) { base.OnKeyDown(e); if (e.KeyCode == Keys.Enter) { timer.Enabled = false; CommitText(); } } private void CommitText() { if (CommitEvent != null) CommitEvent(); } } }