C# RichTextBox的一些操作:自動換行 設定行間距 調整字型
阿新 • • 發佈:2019-02-10
最近用到richtextbox,一些操作記錄在下面:
1 禁止自動換行
richtextbox1.WordWrap = false;
wordwrap 屬性:指示多行文字控制元件是否在必要時自動換到下一行的開始處;
2 調整字型大小
richtextbox.Font = new System.Drawing.Font(FontFamily.GenericMonospace, 10);
3 調整行間距
先寫一個類:
class CSetLineSpace { public const int WM_USER = 0x0400; public const int EM_GETPARAFORMAT = WM_USER + 61; public const int EM_SETPARAFORMAT = WM_USER + 71; public const long MAX_TAB_STOPS = 32; public const uint PFM_LINESPACING = 0x00000100; [StructLayout(LayoutKind.Sequential)] private struct PARAFORMAT2 { public int cbSize; public uint dwMask; public short wNumbering; public short wReserved; public int dxStartIndent; public int dxRightIndent; public int dxOffset; public short wAlignment; public short cTabCount; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public int[] rgxTabs; public int dySpaceBefore; public int dySpaceAfter; public int dyLineSpacing; public short sStyle; public byte bLineSpacingRule; public byte bOutlineLevel; public short wShadingWeight; public short wShadingStyle; public short wNumberingStart; public short wNumberingStyle; public short wNumberingTab; public short wBorderSpace; public short wBorderWidth; public short wBorders; } [DllImport("user32", CharSet = CharSet.Auto)] private static extern IntPtr SendMessage(HandleRef hWnd, int msg, int wParam, ref PARAFORMAT2 lParam); /// <summary> /// 設定行距 /// </summary> /// <param name="ctl">控制元件</param> /// <param name="dyLineSpacing">間距</param> public static void SetLineSpace(Control ctl, int dyLineSpacing) { PARAFORMAT2 fmt = new PARAFORMAT2(); fmt.cbSize = Marshal.SizeOf(fmt); fmt.bLineSpacingRule = 4;// bLineSpacingRule; fmt.dyLineSpacing = dyLineSpacing; fmt.dwMask = PFM_LINESPACING; try { SendMessage(new HandleRef(ctl, ctl.Handle), EM_SETPARAFORMAT, 0, ref fmt); } catch { } } }
然後在form_load裡呼叫其方法:
SetLineSpace(richtextbox1, 300);
第三個參考自網上資源,一個部落格,但現在找不到出處了,在這裡謝謝他吧!