Csharp Winform TextBox 樣式以一條橫線顯示

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Drawing; using System.Drawing.Drawing2D; using System.Windows.Forms; using System.Reflection; using System.Runtime.InteropServices; using System.ComponentModel;     namespace TextboxsStyleLineControlLibrary {     /// <summary>     ///csharp winform 划横线输入框     /// 塗聚文 2012-03-27     /// 締友計算機信息技術有限公司     /// 捷為工作室     /// </summary>     [ToolboxItem(true)]     public  class GeovinDuTextBoxLine:TextBox     {         private bool m_DrawLine = false;         private const int WM_NCPAINT = 0x0085;         private const int WM_CHAR = 0x0102;           [System.Runtime.InteropServices.DllImport("user32.dll ")]         static extern IntPtr GetWindowDC(IntPtr hWnd);           [System.Runtime.InteropServices.DllImport("user32.dll ")]         static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);         /// <summary>         ///         /// </summary>         public GeovinDuTextBoxLine()         {             //             //   TODO:   在此处添加构造函数逻辑             //             this.SetStyle(ControlStyles.DoubleBuffer, true);             this.BorderStyle = BorderStyle.None;         }         private Color _linecolor = Color.Black;         /// <summary>         /// 线条颜色         /// </summary>         public Color LineColor         {             get             {                 return this._linecolor;             }             set             {                 this._linecolor = value;                 this.Invalidate();             }         }           private const int WM_PAINT = 0xF;             /// <summary>         ///         /// </summary>         public bool DrawLine         {             get             {                 return this.m_DrawLine;             }             set             {                 this.m_DrawLine = value;                 this.Invalidate();             }         }         /// <summary>         ///         /// </summary>         /// <param name="m"></param>         protected override void WndProc(ref   Message m)         {                 base.WndProc(ref   m);             if (m.Msg == 0xf || m.Msg == 0x133)             {                 if (this.DrawLine)                 {                     IntPtr hDC = GetWindowDC(m.HWnd);                     if (hDC.ToInt32() == 0)                     {                         return;                     }                     Graphics g = Graphics.FromHdc(hDC);                     //Brush b = Brushes.Black;                     Pen p = new Pen(this._linecolor, 1);//b                       Point p1 = new Point(0, this.Height - 2);                     Point p2 = new Point(this.Width, Height - 2);                     g.DrawLine(p, p1, p2);                       m.Result = IntPtr.Zero;                     ReleaseDC(m.HWnd, hDC);                 }             }         }         } }