[C#]Winform下斷行符號或Tab鍵自動切換下一個控制項焦點

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滿足使用者體驗,在資料錄入時,能在輸入完一個資訊後通過斷行符號或Tab鍵自動的切換到下一個控制項(欄位).

在介面控制項設計時,預設可以通過設定控制項的TabIndex來實現.但在布局調整時或者是對輸入的內容有選擇性時,從用代碼的方式來處理顯得更好維護一點.

完整的實現方法如下:

/// <summary>    /// 斷行符號、Tab鍵盤切換或執行操作    /// </summary>   public sealed class TabEnter:IDisposable    {       private List<StringBuilder> ml;       private int i=0;       private System.Windows.Forms.Control mc;       /// <summary>       /// 知否啟用Tab鍵功能       /// </summary>       private bool mallowTab=false;       /// <summary>       /// 是否啟用Tab鍵切換/執行.       /// </summary>       public bool AllowTab       {           get { return mallowTab; }           set { mallowTab = value; }       }       public TabEnter(System.Windows.Forms.Control c)       {           ml = new List<StringBuilder>();           mc = c;       }       public TabEnter(System.Windows.Forms.Control c, bool allowTab):this(c)       {           mallowTab = allowTab;       }       public void Add(System.Windows.Forms.Control c)       {           c.KeyPress += KeyPressHandler;           c.TabIndex = i;           ml.Add(new StringBuilder(c.Name));           i += 1;       }       /// <summary>       /// 在需要獨立處理KeyPress時間時,採用KeyUp來執行,當然可繼續實現KeyDown       /// </summary>       /// <param name="c"></param>       public void AddKeyUp(System.Windows.Forms.Control c)       {           c.KeyUp += KeyUpHandler;           c.TabIndex = i;           ml.Add(new StringBuilder(c.Name));           i += 1;       }       private void KeyPressHandler(object sender, System.Windows.Forms.KeyPressEventArgs e)       {           if ((e.KeyChar == (Char)13) || (e.KeyChar == (Char)9 && mallowTab == true))           {               int j = ((System.Windows.Forms.Control)sender).TabIndex;               if (j >= ml.Count - 1) return;               string cname = ml[j + 1].ToString();               if (string.IsNullOrEmpty(cname)) return;               System.Windows.Forms.Control[] tca = mc.Controls.Find(cname, true);               if (tca == null || tca.Length == 0) return;               System.Windows.Forms.Control tc = tca[0];               if (tc == null) return;               System.Windows.Forms.Button b = tc as System.Windows.Forms.Button;               if (b != null)                   b.PerformClick();               else                   tc.Focus();           }       }       private void KeyUpHandler(Object sender, System.Windows.Forms.KeyEventArgs e)       {           if ((e.KeyCode == System.Windows.Forms.Keys.Enter) || (e.KeyCode == System.Windows.Forms.Keys.Tab && mallowTab == true))           {               int j = ((System.Windows.Forms.Control)sender).TabIndex;               if (j >= ml.Count - 1) return;               string cname = ml[j + 1].ToString();               if (string.IsNullOrEmpty(cname)) return;               System.Windows.Forms.Control[] tca = mc.Controls.Find(cname, true);               if (tca == null || tca.Length == 0) return;               System.Windows.Forms.Control tc = tca[0];               if (tc == null) return;               if (tc.GetType()==typeof(System.Windows.Forms.Button))               {                   ((System.Windows.Forms.Button)tc).PerformClick();               }               else               {                   if (tc.Visible == true) tc.Focus();               }           }       }       #region "資源釋放"       public void Dispose()        {            Disposing(true);            GC.SuppressFinalize(this);        }        private bool m_disposed = false;        protected  void Disposing(bool disposing)        {            if (!m_disposed)            {                if (disposing)                {                    //Release managed resources                    ml.Clear();                    ml = null;                    i = 0;                    mc = null;                }                //Release unmanaged Resources                m_disposed = true;            }        }        ~TabEnter()        {            Disposing(false);        }       #endregion    }

　　

[C#]Winform下斷行符號或Tab鍵自動切換下一個控制項焦點