What is the usage of AvalonEdit in WPF?

2 years ago
Ava Mitchell
2 minutes

AvalonEdit is an open-source WPF control used for displaying and editing text. It is developed based on ICSharpCode.TextEditor and comes with many powerful features and extensibility.

Here are some common uses of AvalonEdit:

  1. Add the AvalonEdit control to your WPF window or user control.
<avalonedit:TextEditor x:Name="textEditor" />
  1. Please set the text content.
textEditor.Text = "Hello, AvalonEdit!";
  1. Obtain the current text content:
string text = textEditor.Text;
  1. Enable syntax highlighting.

AvalonEdit supports syntax highlighting for various languages, you can achieve this by setting a syntax definition file to the control’s SyntaxHighlighting property.

textEditor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinition("C#");
  1. Enable auto-complete feature.

AvalonEdit can provide autocomplete functionality by adding custom code completion logic.

var completionWindow = new CompletionWindow(textEditor.TextArea);
completionWindow.CloseWhenCaretAtBeginning = true;

IList<ICompletionData> completionData = completionWindow.CompletionList.CompletionData;
completionData.Add(new MyCompletionData("Item 1"));
completionData.Add(new MyCompletionData("Item 2"));

completionWindow.Show();
  1. Enable code folding feature.

AvalonEdit allows users to fold and unfold code blocks.

textEditor.TextArea.TextView.LineTransformers.Add(new FoldingManager(textEditor.TextArea.Document));
  1. Handle text change events.
textEditor.TextChanged += TextEditor_TextChanged;

private void TextEditor_TextChanged(object sender, EventArgs e)
{
    // 处理文本改变事件
}

These are just some basic usage of AvalonEdit, it also offers many other features such as code snippet insertion, code completion, and smart indentation. You can learn more usage and features by checking out AvalonEdit’s documentation and examples.

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