是否可以在 WinForm 标签中格式化某些文本,而不是将文本分成多个标签?请忽略标签文本中的 HTML 标签;它只是用来说明我的观点。
例如:
Dim myLabel As New Label
myLabel.Text = "This is <b>bold</b> text. This is <i>italicized</i> text."
这会将标签中的文本生成为:
这是粗体文本。这是 斜体文本。
是否可以在 WinForm 标签中格式化某些文本,而不是将文本分成多个标签?请忽略标签文本中的 HTML 标签;它只是用来说明我的观点。
例如:
Dim myLabel As New Label
myLabel.Text = "This is <b>bold</b> text. This is <i>italicized</i> text."
这会将标签中的文本生成为:
这是粗体文本。这是 斜体文本。
这对于 WinForms 标签是不可能的。标签必须只有一种字体,一种尺寸和一张脸。你有几个选择:
不是真的,但你可以用只读的没有边框的 RichTextBox 来伪造它。RichTextBox 支持富文本格式 (rtf)。
另一种解决方法,迟到了:如果您不想使用第三方控件,并且您只是想引起对标签中某些文本的注意,并且您可以使用下划线,您可以使用一个链接标签。
请注意,许多人认为这是一种“可用性犯罪”,但如果您不是为最终用户消费而设计的东西,那么它可能是您准备好在您的良心上拥有的东西。
诀窍是将禁用的链接添加到您想要下划线的文本部分,然后全局设置链接颜色以匹配标签的其余部分。您可以在设计时设置几乎所有必要的属性,除了Links.Add()
片段,但这里它们在代码中:
linkLabel1.Text = "You are accessing a government system, and all activity " +
"will be logged. If you do not wish to continue, log out now.";
linkLabel1.AutoSize = false;
linkLabel1.Size = new Size(365, 50);
linkLabel1.TextAlign = ContentAlignment.MiddleCenter;
linkLabel1.Links.Clear();
linkLabel1.Links.Add(20, 17).Enabled = false; // "government system"
linkLabel1.Links.Add(105, 11).Enabled = false; // "log out now"
linkLabel1.LinkColor = linkLabel1.ForeColor;
linkLabel1.DisabledLinkColor = linkLabel1.ForeColor;
结果:
为我工作的解决方案 - 使用自定义 RichEditBox。使用正确的属性,它将被视为带有粗体支持的简单标签。
1)首先,添加带有禁用插入符号的自定义 RichTextLabel 类:
public class RichTextLabel : RichTextBox
{
public RichTextLabel()
{
base.ReadOnly = true;
base.BorderStyle = BorderStyle.None;
base.TabStop = false;
base.SetStyle(ControlStyles.Selectable, false);
base.SetStyle(ControlStyles.UserMouse, true);
base.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
base.MouseEnter += delegate(object sender, EventArgs e)
{
this.Cursor = Cursors.Default;
};
}
protected override void WndProc(ref Message m)
{
if (m.Msg == 0x204) return; // WM_RBUTTONDOWN
if (m.Msg == 0x205) return; // WM_RBUTTONUP
base.WndProc(ref m);
}
}
2)将您的句子拆分为带有 IsSelected 标志的单词,以确定该单词是否应该是粗体:
private void AutocompleteItemControl_Load(object sender, EventArgs e)
{
RichTextLabel rtl = new RichTextLabel();
rtl.Font = new Font("MS Reference Sans Serif", 15.57F);
StringBuilder sb = new StringBuilder();
sb.Append(@"{\rtf1\ansi ");
foreach (var wordPart in wordParts)
{
if (wordPart.IsSelected)
{
sb.Append(@"\b ");
}
sb.Append(ConvertString2RTF(wordPart.WordPart));
if (wordPart.IsSelected)
{
sb.Append(@"\b0 ");
}
}
sb.Append(@"}");
rtl.Rtf = sb.ToString();
rtl.Width = this.Width;
this.Controls.Add(rtl);
}
3)添加将文本转换为有效 rtf 的功能(支持 unicode!):
private string ConvertString2RTF(string input)
{
//first take care of special RTF chars
StringBuilder backslashed = new StringBuilder(input);
backslashed.Replace(@"\", @"\\");
backslashed.Replace(@"{", @"\{");
backslashed.Replace(@"}", @"\}");
//then convert the string char by char
StringBuilder sb = new StringBuilder();
foreach (char character in backslashed.ToString())
{
if (character <= 0x7f)
sb.Append(character);
else
sb.Append("\\u" + Convert.ToUInt32(character) + "?");
}
return sb.ToString();
}
对我来说就像一个魅力!解决方案编译自:
在 Form1_load 中做
myRtfControl.Rtf = Resource1.MyRtfControlText
我通过构建一个UserControl
包含TransparentRichTextBox
只读的一个来解决这个问题。这TransparentRichTextBox
是一个RichTextBox
允许透明的:
透明富文本框.cs:
public class TransparentRichTextBox : RichTextBox
{
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
static extern IntPtr LoadLibrary(string lpFileName);
protected override CreateParams CreateParams
{
get
{
CreateParams prams = base.CreateParams;
if (TransparentRichTextBox.LoadLibrary("msftedit.dll") != IntPtr.Zero)
{
prams.ExStyle |= 0x020; // transparent
prams.ClassName = "RICHEDIT50W";
}
return prams;
}
}
}
finalUserControl
充当TransparentRichTextBox
. 不幸的是,我不得不将它限制AutoSize
在我自己的方式上,因为它AutoSize
已经RichTextBox
坏了。
AutoRichLabel.designer.cs:
partial class AutoRichLabel
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.rtb = new TransparentRichTextBox();
this.SuspendLayout();
//
// rtb
//
this.rtb.BorderStyle = System.Windows.Forms.BorderStyle.None;
this.rtb.Dock = System.Windows.Forms.DockStyle.Fill;
this.rtb.Location = new System.Drawing.Point(0, 0);
this.rtb.Margin = new System.Windows.Forms.Padding(0);
this.rtb.Name = "rtb";
this.rtb.ReadOnly = true;
this.rtb.ScrollBars = System.Windows.Forms.RichTextBoxScrollBars.None;
this.rtb.Size = new System.Drawing.Size(46, 30);
this.rtb.TabIndex = 0;
this.rtb.Text = "";
this.rtb.WordWrap = false;
this.rtb.ContentsResized += new System.Windows.Forms.ContentsResizedEventHandler(this.rtb_ContentsResized);
//
// AutoRichLabel
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
this.BackColor = System.Drawing.Color.Transparent;
this.Controls.Add(this.rtb);
this.Name = "AutoRichLabel";
this.Size = new System.Drawing.Size(46, 30);
this.ResumeLayout(false);
}
#endregion
private TransparentRichTextBox rtb;
}
AutoRichLabel.cs:
/// <summary>
/// <para>An auto sized label with the ability to display text with formattings by using the Rich Text Format.</para>
/// <para></para>
/// <para>Short RTF syntax examples: </para>
/// <para></para>
/// <para>Paragraph: </para>
/// <para>{\pard This is a paragraph!\par}</para>
/// <para></para>
/// <para>Bold / Italic / Underline: </para>
/// <para>\b bold text\b0</para>
/// <para>\i italic text\i0</para>
/// <para>\ul underline text\ul0</para>
/// <para></para>
/// <para>Alternate color using color table: </para>
/// <para>{\colortbl ;\red0\green77\blue187;}{\pard The word \cf1 fish\cf0 is blue.\par</para>
/// <para></para>
/// <para>Additional information: </para>
/// <para>Always wrap every text in a paragraph. </para>
/// <para>Different tags can be stacked (i.e. \pard\b\i Bold and Italic\i0\b0\par)</para>
/// <para>The space behind a tag is ignored. So if you need a space behind it, insert two spaces (i.e. \pard The word \bBOLD\0 is bold.\par)</para>
/// <para>Full specification: http://www.biblioscape.com/rtf15_spec.htm </para>
/// </summary>
public partial class AutoRichLabel : UserControl
{
/// <summary>
/// The rich text content.
/// <para></para>
/// <para>Short RTF syntax examples: </para>
/// <para></para>
/// <para>Paragraph: </para>
/// <para>{\pard This is a paragraph!\par}</para>
/// <para></para>
/// <para>Bold / Italic / Underline: </para>
/// <para>\b bold text\b0</para>
/// <para>\i italic text\i0</para>
/// <para>\ul underline text\ul0</para>
/// <para></para>
/// <para>Alternate color using color table: </para>
/// <para>{\colortbl ;\red0\green77\blue187;}{\pard The word \cf1 fish\cf0 is blue.\par</para>
/// <para></para>
/// <para>Additional information: </para>
/// <para>Always wrap every text in a paragraph. </para>
/// <para>Different tags can be stacked (i.e. \pard\b\i Bold and Italic\i0\b0\par)</para>
/// <para>The space behind a tag is ignored. So if you need a space behind it, insert two spaces (i.e. \pard The word \bBOLD\0 is bold.\par)</para>
/// <para>Full specification: http://www.biblioscape.com/rtf15_spec.htm </para>
/// </summary>
[Browsable(true)]
public string RtfContent
{
get
{
return this.rtb.Rtf;
}
set
{
this.rtb.WordWrap = false; // to prevent any display bugs, word wrap must be off while changing the rich text content.
this.rtb.Rtf = value.StartsWith(@"{\rtf1") ? value : @"{\rtf1" + value + "}"; // Setting the rich text content will trigger the ContentsResized event.
this.Fit(); // Override width and height.
this.rtb.WordWrap = this.WordWrap; // Set the word wrap back.
}
}
/// <summary>
/// Dynamic width of the control.
/// </summary>
[Browsable(false)]
public new int Width
{
get
{
return base.Width;
}
}
/// <summary>
/// Dynamic height of the control.
/// </summary>
[Browsable(false)]
public new int Height
{
get
{
return base.Height;
}
}
/// <summary>
/// The measured width based on the content.
/// </summary>
public int DesiredWidth { get; private set; }
/// <summary>
/// The measured height based on the content.
/// </summary>
public int DesiredHeight { get; private set; }
/// <summary>
/// Determines the text will be word wrapped. This is true, when the maximum size has been set.
/// </summary>
public bool WordWrap { get; private set; }
/// <summary>
/// Constructor.
/// </summary>
public AutoRichLabel()
{
InitializeComponent();
}
/// <summary>
/// Overrides the width and height with the measured width and height
/// </summary>
public void Fit()
{
base.Width = this.DesiredWidth;
base.Height = this.DesiredHeight;
}
/// <summary>
/// Will be called when the rich text content of the control changes.
/// </summary>
private void rtb_ContentsResized(object sender, ContentsResizedEventArgs e)
{
this.AutoSize = false; // Disable auto size, else it will break everything
this.WordWrap = this.MaximumSize.Width > 0; // Enable word wrap when the maximum width has been set.
this.DesiredWidth = this.rtb.WordWrap ? this.MaximumSize.Width : e.NewRectangle.Width; // Measure width.
this.DesiredHeight = this.MaximumSize.Height > 0 && this.MaximumSize.Height < e.NewRectangle.Height ? this.MaximumSize.Height : e.NewRectangle.Height; // Measure height.
this.Fit(); // Override width and height.
}
}
富文本格式的语法非常简单:
段落:
{\pard This is a paragraph!\par}
粗体/斜体/下划线文本:
\b bold text\b0
\i italic text\i0
\ul underline text\ul0
使用颜色表替换颜色:
{\colortbl ;\red0\green77\blue187;}
{\pard The word \cf1 fish\cf0 is blue.\par
但请注意:始终将每个文本都包含在一个段落中。此外,可以堆叠不同的标签(即\pard\b\i Bold and Italic\i0\b0\par
)并忽略标签后面的空格字符。因此,如果您需要在其后面留一个空格,请插入两个空格(即\pard The word \bBOLD\0 is bold.\par
)。要转义\
或{
或}
,请使用前导\
。有关详细信息,请参阅在线富文本格式的完整规范。
使用这种非常简单的语法,您可以生成类似于第一张图片中看到的内容。在第一张图片中附加到RtfContent
my 属性的富文本内容是:AutoRichLabel
{\colortbl ;\red0\green77\blue187;}
{\pard\b BOLD\b0 \i ITALIC\i0 \ul UNDERLINE\ul0 \\\{\}\par}
{\pard\cf1\b BOLD\b0 \i ITALIC\i0 \ul UNDERLINE\ul0\cf0 \\\{\}\par}
如果要启用自动换行,请将最大宽度设置为所需大小。但是,即使文本较短,这也会将宽度固定为最大宽度。
玩得开心!
2009 年有一篇关于代码项目的优秀文章,名为“您将使用的专业 HTML 渲染器”,它实现了与原始发帖人想要的类似的东西。
我在我们的几个项目中成功地使用了它。
非常简单的解决方案:
现在 LabelB 将根据 LabelA 的文本长度发生变化。
就这样。
我也有兴趣了解它是否可能。
当我们找不到解决方案时,我们求助于 Component Ones 'SuperLabel' 控件,该控件允许在标签中添加 HTML 标记。
意识到这是一个老问题,我的答案更多是为了像我这样仍在寻找这样的解决方案并偶然发现这个问题的人。
除了已经提到的,DevExpress 的LabelControl是一个支持这种行为的标签 - demo here。唉,它是付费图书馆的一部分。
如果您正在寻找免费的解决方案,我相信HTML Renderer是下一个最佳选择。
FlowLayoutPanel 可以很好地解决您的问题。如果您将标签添加到流程面板并格式化每个标签的字体和边距属性,那么您可以拥有不同的字体样式。开始工作的非常快速和简单的解决方案。
是的。您可以使用 HTML Render 来实现。如你所见,请点击链接:https ://htmlrenderer.codeplex.com/ 我希望这很有用。