Winform RichTextBox 通过API的方式进行设置
1: public partial class Form1 : Form
2: {
3: public const int WM_USER = 0x0400;
4: public const int EM_GETPARAFORMAT = WM_USER + 61;
5: public const int EM_SETPARAFORMAT = WM_USER + 71;
6: public const long MAX_TAB_STOPS = 32;
7: public const uint PFM_LINESPACING = 0x00000100;
8: [StructLayout(LayoutKind.Sequential)]
9: private struct PARAFORMAT2
10: {
11: public int cbSize;
12: public uint dwMask;
13: public short wNumbering;
14: public short wReserved;
15: public int dxStartIndent;
16: public int dxRightIndent;
17: public int dxOffset;
18: public short wAlignment;
19: public short cTabCount;
20: [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
21: public int[] rgxTabs;
22: public int dySpaceBefore;
23: public int dySpaceAfter;
24: public int dyLineSpacing;
25: public short sStyle;
26: public byte bLineSpacingRule;
27: public byte bOutlineLevel;
28: public short wShadingWeight;
29: public short wShadingStyle;
30: public short wNumberingStart;
31: public short wNumberingStyle;
32: public short wNumberingTab;
33: public short wBorderSpace;
34: public short wBorderWidth;
35: public short wBorders;
36: }
37:
38: public Form1()
39: {
40: InitializeComponent();
41: }
42:
43: private void MenuItemExit_Click(object sender, EventArgs e)
44: {
45: Application.Exit();
46: }
47:
48: private void MenuItemOpen_Click(object sender, EventArgs e)
49: {
50: if (openFileDialog1.ShowDialog() == DialogResult.OK)
51: {
52: richTextBox1.LoadFile(openFileDialog1.FileName, RichTextBoxStreamType.PlainText);
53: }
54: }
55:
56: [DllImport("user32", CharSet = CharSet.Auto)]
57: private static extern IntPtr SendMessage(HandleRef hWnd, int msg, int wParam, ref PARAFORMAT2 lParam);
58:
59: private void Form1_Load(object sender, EventArgs e)
60: {
61: PARAFORMAT2 fmt = new PARAFORMAT2();
62: fmt.cbSize = Marshal.SizeOf(fmt);
63: fmt.bLineSpacingRule = 4;
64: fmt.dyLineSpacing = 400;//可修改的行高数值。我使用的300，感觉较为合适，这个500有点宽了！
65: fmt.dwMask = PFM_LINESPACING;
66: SendMessage(new HandleRef(this.richTextBox1, richTextBox1.Handle), EM_SETPARAFORMAT, 4, ref fmt);
67:
68:
69: richTextBox1.BackColor = Color.FromArgb(231, 244, 254);
70: }
71: }
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/firebird2010/archive/2009/11/30/4907923.aspx
