Skip to main content

RichEditControl.AutoCorrect Event

Fires when text is typed in the control.

Namespace: DevExpress.Xpf.RichEdit

Assembly: DevExpress.Xpf.RichEdit.v24.1.dll

NuGet Package: DevExpress.Wpf.RichEdit


public event AutoCorrectEventHandler AutoCorrect

Event Data

The AutoCorrect event's data class is AutoCorrectEventArgs. The following properties provide information specific to this event:

Property Description
AutoCorrectInfo Gets or sets the AutoCorrectInfo object that provides methods to analyze input text and contains a replacement object.

The event data class exposes the following methods:

Method Description
CreateAutoCorrectInfo() Allows you to create a new AutoCorrectInfo instance for use within the event handler.


Handle the AutoCorrect event to implement complex replacements as you type.

The RichEditControl.AutoCorrect event is handled to replace the typed $ symbol with a picture of a dollar, and substitute the text enclosed in percent symbols with custom content.

To accomplish this task, a document text obtained via the AutoCorrectEventArgs.AutoCorrectInfo property is amended by expanding its left boundary using the AutoCorrectInfo.DecrementStartPosition method, until a special symbol or a word separator symbol is found. If a resulting string meets certain conditions, such as whether it is a dollar sign or a %date% string, a replacement object is passed to the document via the AutoCorrectInfo.ReplaceWith property. A replacement object can be a string or an image.

private void richEditControl1_AutoCorrect(object sender, DevExpress.XtraRichEdit.AutoCorrectEventArgs e)
    AutoCorrectInfo info = e.AutoCorrectInfo;
    e.AutoCorrectInfo = null;

    if (info.Text.Length <= 0)
    for (; ; ) {
        if (!info.DecrementStartPosition())

        if (IsSeparator(info.Text[0]))

        if (info.Text[0] == '$') {
            info.ReplaceWith = CreateImageFromResx("dollar_pic.png");
            e.AutoCorrectInfo = info;

        if (info.Text[0] == '%') {
            string replaceString = CalculateFunction(info.Text);
            if (!String.IsNullOrEmpty(replaceString)) {
                info.ReplaceWith = replaceString;
                e.AutoCorrectInfo = info;
See Also