我需要在 Windows 窗体上以丰富的格式编写一行文本。我怎样才能做到这一点？
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5705 次
4 回答
2
您必须将字符串拆分为具有相同格式的“块”并绘制每个“块”。
使用 Graphics.MeasureString 计算位置，使用 Graphics.DrawString 进行最终绘制。
简单的示例代码（不解决自动换行、图像等...）：
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
this.Paint += new PaintEventHandler(Form1_Paint);
this.SizeChanged += new EventHandler(Form1_SizeChanged);
}
void Form1_SizeChanged(object sender, EventArgs e) {
this.Invalidate();
}
public class RichText {
public Font Font { get; set; }
public Color? TextColor { get; set; }
public string Text { get; set; }
public RichText() { }
public RichText(string text) {
this.Text = text;
}
public RichText(string text, Font font) : this(text) {
this.Font = font;
}
public RichText(string text, Color textColor) : this(text) {
this.TextColor = textColor;
}
public RichText(string text, Color textColor, Font font) : this(text, textColor) {
this.Font = font;
}
}
void Form1_Paint(object sender, PaintEventArgs e) {
var arial_8 = new Font("Arial", 8);
var webdings_10 = new Font("Webdings", 10);
var richTexts = new RichText[]{
new RichText("Default text.")
, new RichText("Default green text.", Color.Green)
, new RichText("Regular arial 8.", arial_8)
, new RichText("Bold arial 8.", new Font(arial_8, FontStyle.Bold))
, new RichText("Regular webdings 10.", webdings_10)
, new RichText("Regular blue webdings 10.", Color.Blue, webdings_10)
};
var g = e.Graphics;
Point textPosition = new Point(0, 0);
int maxWidth = this.ClientSize.Width;
foreach (var richText in richTexts) {
var text = richText.Text;
if (string.IsNullOrEmpty(text)) { continue; }
var font = richText.Font ?? Control.DefaultFont;
var textColor = richText.TextColor ?? Control.DefaultForeColor;
using (var brush = new SolidBrush(textColor)) {
var rslt_Measure = g.MeasureString(text, font);
if (rslt_Measure.Width + textPosition.X > maxWidth) {
// this code does not solve word-wraping
var rslt_Line = g.MeasureString("\r\n", font);
Point tmpTextPosition = new Point(0, textPosition.Y + (int)rslt_Line.Height);
g.DrawString(text, font, brush, tmpTextPosition);
var newPosition = tmpTextPosition;
newPosition.X += (int)rslt_Measure.Width;
textPosition = newPosition;
}
else {
g.DrawString(text, font, brush, textPosition);
var newPosition = textPosition;
newPosition.X += (int)rslt_Measure.Width;
textPosition = newPosition;
}
}
}
}
}
编辑：
如果你想要处理 RTF，也许这个链接会很有用：
于 2011-03-22T12:00:31.700 回答
1
除了 TcKs 代码之外，以下部分将解决自动换行功能：
private void pictureBox2_Paint(object sender, PaintEventArgs e)
{
var arial_8 = new Font("Arial", 8);
var webdings_10 = new Font("Webdings", 10);
var richTexts = new RichText[] {
new RichText("Default text and this is the lengthy string to check the display. One more line to verify again")
, new RichText("Default green text. this is the lengthy string to check the display. One more line to verify again", Color.Green)
, new RichText("Regular arial 8.", arial_8)
, new RichText("Bold arial 8.", new Font(arial_8, FontStyle.Bold))
};
var g = e.Graphics;
Point textPosition = new Point(0, 0);
int maxWidth = this.pictureBox2.ClientSize.Width;
foreach (var richText in richTexts)
{
var text = richText.Text;
if (string.IsNullOrEmpty(text)) { continue; }
var font = richText.Font ?? Control.DefaultFont;
var textColor = richText.TextColor ?? Control.DefaultForeColor;
using (var brush = new SolidBrush(textColor))
{
string[] strs = text.Split(new string[] { " " }, StringSplitOptions.None);
int fontheight = (int)g.MeasureString("\r\n", font).Height;
foreach (string val in strs)
{
var measure = g.MeasureString(val, font);
if (measure.Width + textPosition.X > maxWidth)
{
var newPosition = textPosition;
newPosition.X = 0;
newPosition.Y = textPosition.Y + fontheight;
textPosition = newPosition;
}
g.DrawString(val, font, brush, textPosition);
var nextposition = textPosition;
nextposition.X = textPosition.X + (int)measure.Width;
textPosition = nextposition;
}
}
}
}
于 2011-06-03T16:34:36.527 回答
1
设置为只读的 RichTextBox 控件会满足您的需要吗？
于 2011-03-22T11:33:13.830 回答