DevExpress Winform control, many of the controls are supported HtmlDraw, it is similar to html text portion of the notes set font weight size, color, background color, text with pictures, italic, underline, strikethrough, and links, which is a interface used to achieve diversification effect of a nice feature, in addition to helping document the official website, online there is little information on this one, in line with the benefit of mind DevExpress developers to write this article, please be clearly marked as to reproduction , I found pirated articles, will be held accountable.
First make a simple demonstration effect with LabelControl:
One, supported controls introduced ( the official website from DevExpress help files )
At present, the controls in the table below support HTML format. Please note that in order to make certain controls allow HTML formatting, you must enable the appropriate Boolean property
二、支持的标签
由上面的表格我们看出，我们常用的控件中有不少控件都是支持HtmlFormating的设置的，这应该让人比较兴奋的，不过，DevExpress的HtmlFormating又有点区别于普通的Html标签，关于Dev的Html标签，请看以下表格：
标签包含“ < ”和“ > ”符号，通常具有相应的结束标记。如果标记与其结束副本不匹配，则标记后面的所有文本都将相应地格式化。
| Tag |
End Tag |
描述 |
|---|---|---|
| <br> |
- |
插入一个换行符。要使用此标记，您应该通过相应外观对象的TextOptions.WordWrap选项启用自动换行。 要在GridControl中使用此标记，请通过GridViewAppearances.HeaderPanel对象，GridColumn.AppearanceHeader对象，BandedViewAppearances.BandPanel对象或GridBand.AppearanceHeader对象启用自动换行。 要在TreeList中使用此标记，请通过TreeListAppearanceCollection.HeaderPanel对象或TreeListColumn.AppearanceHeader对象启用自动换行。 要在LabelControl中使用此标记，请通过LabelControl.Appearance对象启用自动换行。 要在CheckEdit控件中使用此标记，请通过CheckEdit.Properties.Appearance对象（RepositoryItem.Appearance）启用自动换行。 要在布局项标题中使用此标记，请通过项目或布局组的BaseLayoutItem.AppearanceItemCaption对象启用自动换行。 |
| <color=value> Examples: <color=red> <color=0,255,0> <color=255,0,255,0> <color=#0000FF> |
</color> |
指定文本颜色. |
| <backcolor=value> Examples: <backcolor=red> <backcolor=0,255,0> <backcolor=255,0,255,0> <backcolor=#0000FF> |
</backcolor> |
指定背景颜色. |
| <size=value> Examples: <size=10> <size=+4> <size=-4> |
</size> |
指定字体大小。 |
| <b> |
</b> |
定义粗体文本。 |
| <i> |
</i> |
定义斜体文本。 |
| <s> |
</s> |
定义删除线文本。 |
| <u> |
</u> |
定义带下划线的文本。 |
| <image=value> Examples: <image=UpArrow.png> <image=#LeftArrow> <image=DownArrow.png;size=20,20;align=top> |
- |
插入绑定图像集合或项目资源中的图像。要从项目资源插入图像，图像的名称前面必须带有“＃”字符。从项目资源引用的图像不会在设计时出现，但会在运行时出现。 注意
项目资源图像只能从Entry Assembly（启动可执行文件）加载 。因此，如果在附加类库的资源中定义图像，则无法使用图像标记加载这些图像，即使是从此库代码中也是如此。
如果图像的名称前面没有“＃”，则暗示图像应该通过其名称从绑定的图像集合加载。使用控件的HtmlImages属性提供图像集合（ImageCollection或SvgImageCollection）。 支持图像标记的以下属性。 size - 设置图像的显示大小。 align - 指定图像相对于文本的垂直对齐方式。可能的值：顶部，底部和中心。 必须在标记的值之后指定属性，然后是“;” 字符。它们必须用“;”分隔，并指定不带空格。 下面列出了接受图像标记并提供HtmlImages属性的控件和组件。
|
| <href=value> Example: <href=www.devexpress.com>Our web site</href> |
</href> |
显示超链接。的值字符串指定的超级链接源，以及打开和关闭标签之间的字符串是要被显示的文本。对于能够通过此标记显示超链接的控件，单击超链接将触发HyperlinkClick事件。 |
| <nbsp> |
- |
插入一个不间断的空格字符 (0xA0). |
三、示例
示例1、
代码如下：其中要注意的是图片标签的设置问题，如果是在resource.resx中直接添加的资源，如下图这种方式，则image的标签必须图片名称前加“#”，不需要文件后缀名，如： <image=#tao>
如果采用的是ImageCollection组件添加控件的方式，并且绑定HtmlImages属性的话，则无需添加“#”，但必须添加文件后缀名，如：<image=dev.png>
private void Form1_Load(object sender, EventArgs e)
{
labelControl1.Text = @"<size=14>Size = 14<br>" +
"<b>粗体</b> <i>斜体</i> <u>下划线</u><br>" +
"<size=11>Size = 11<br>" +
"<image=#tao><br>"+//在Resource.resx里面添加图片资源
"<image=dev.png><br>"+//利用ImageCollection组件添加图片，并且labelcontrol的htmlImages属性绑定该ImageCollection
"<color=255, 0, 0>简单文本</color></size><br>" +
"<href=https://blog.csdn.net/u012097590>涛神博客链接</href>";
labelControl1.AllowHtmlString = true;//必须启动
labelControl1.Appearance.TextOptions.WordWrap = DevExpress.Utils.WordWrap.Wrap;//允许文本可以换行，否则br换行标签无效
labelControl1.Appearance.Options.UseTextOptions = true;//设置textoptions，就必须将usetextoptions设置为true才会生效
labelControl1.AutoSizeMode = DevExpress.XtraEditors.LabelAutoSizeMode.Vertical;
labelControl1.HyperlinkClick += labelControl1_HyperlinkClick;//注册链接的事件
}
private void labelControl1_HyperlinkClick(object sender, DevExpress.Utils.HyperlinkClickEventArgs e)
{
System.Diagnostics.Process.Start(e.Link);
}效果图：
示例2：
给simpleButton控件的提示框内容增加链接
代码示例：
using DevExpress.Utils;
using System.Diagnostics;
void SimpleButtonSupperTooltip()
{
ToolTipController defaultTooltipController = DevExpress.Utils.ToolTipController.DefaultController;
SuperToolTip sTooltip = new SuperToolTip();
SuperToolTipSetupArgs args = new SuperToolTipSetupArgs();
args.Title.Text = "Header";
args.Contents.Text = "关于DevExpress的学习和资源获取可以关注本人的<href=https://blog.csdn.net/u012097590>CSDN博客</href> 或者<href=http://www.dxper.net>开发者论坛";
args.ShowFooterSeparator = true;
args.Footer.Text = "Footer";
sTooltip.Setup(args);
sTooltip.AllowHtmlText = DefaultBoolean.True;
defaultTooltipController.HyperlinkClick += defaultTooltipController_HyperlinkClick;
simpleButton1.SuperTip = sTooltip;
}
void defaultTooltipController_HyperlinkClick(object sender, HyperlinkClickEventArgs e)
{
Process process = new Process();
process.StartInfo.FileName = (e.Link);
process.StartInfo.Verb = "open";
process.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
try
{
process.Start();
}
catch { }
}效果图：
示例3：利用链接打开窗体（应用场景：比如对GridView的某列字段进行解释说明，如果需要更详细说明或者查看明细的数据，可以利用此方式打开指定的窗体，这样呈现效果和体验会更好）
private void ToolTipController1_HyperlinkClick(object sender, HyperlinkClickEventArgs e)
{
var f = GetType().Assembly.CreateInstance(e.Link) as Form;
f.StartPosition = FormStartPosition.CenterScreen;
f.Show();
}
private void ToolTipController1_GetActiveObjectInfo(object sender, ToolTipControllerGetActiveObjectInfoEventArgs e)
{
if (e.SelectedControl == gridControl1)
{
var view = gridView1;
var info = view.CalcHitInfo(e.ControlMousePosition);
if (info.InColumnPanel && info.Column == gridColumn2)
{
var tInfo=new ToolTipControlInfo();
var sup=new SuperToolTip();
tInfo.Object = info.Column;
sup.AllowHtmlText = DefaultBoolean.True;
sup.Items.AddTitle("根据窗体类名实例化窗体");
sup.Items.Add($@"<href={typeof(Form2)}>打开窗体</href>");
tInfo.SuperTip = sup;
e.Info = tInfo;
}
}
}效果图：
