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IntelliPrompts

Updated on May 7, 2026

The RadSyntaxEditor has support for intelliprompts which aim to speed up coding by reducing typos and other common mistakes.

Code Completion

You can show a collection of items when the user inputs a given string through the CompletionListWindow. To do so, you need to populate the presenter's CompletionListItems collection.

Example 1: Populate and display the completion list window

C#
CompletionInfoCollection completionList = new CompletionInfoCollection()
{
    new CompletionInfo("Collapsed", "Indicates that the element is collapsed.", Image.FromFile(@"../../SyntaxEditor/Entity-Enum.png")),
    new CompletionInfo("Hidden", "Indicates that the element is hidden.",Image.FromFile(@"../../SyntaxEditor/Entity-Enum.png")),
    new CompletionInfo("Visible", "Indicates that the element is visible." ,Image.FromFile(@"../../SyntaxEditor/Entity-Enum.png")),

};

this.radSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.CompletionListWindow.Presenter.CompletionListItems = completionList;
VB.NET
Dim CompletionList As CompletionInfoCollection = New CompletionInfoCollection() From
 {
   New CompletionInfo("Collapsed", "Indicates that the element is collapsed.", Image.FromFile("../../SyntaxEditor/Entity-Enum.png")),
   New CompletionInfo("Hidden", "Indicates that the element is hidden.", Image.FromFile("../../SyntaxEditor/Entity-Enum.png")),
   New CompletionInfo("Visible", "Indicates that the element is visible.", Image.FromFile("../../SyntaxEditor/Entity-Enum.png"))
 }

Me.RadSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.CompletionListWindow.Presenter.CompletionListItems = CompletionList

Figure 1: Code completion

WinForms RadSyntaxEditor's Code completion

CodeCompletionCommand is being executed by RadSyntaxEditor when pressing Space+Control keys. It shows the CompletionListWindow. An alternative solution is to display the dialog programmatically by simply calling the SyntaxEditorElement.IntelliPrompts.CompletionListWindow.Show method.

Through the OverloadListWindow you can show a collection of overloads when the user tries to invoke a certain method. To do so, you need to first populate its presenter's OverloadListItems collection. Thanks to the HTML-like text formatting that Telerik Presentation Framework provides it is possible to apply advanced styling mechanism to display formatted text as font style, font color, font size, etc.

Example 2: Populate and display the completion list window

C#
OverloadInfoCollection overloadList = new OverloadInfoCollection
{

    new OverloadInfo("<html><font=Consolas><size=10><color=43,145,175>Span<color=Black>? <color=43,145,175>RadSyntaxEditor<color=Black>.Find(<color=Blue><b>string <color=Black>searchText</b>, <color=Blue>int <color=Black>startIndex)", "<html><font=Consolas><size=10>Finds the specified search text.<br><b><i>searchText:</b> The search text.</i>"),
    new OverloadInfo("signature2signature2signature2signature2signature2", "description2"),
};

this.radSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.OverloadListWindow.Presenter.OverloadListItems = overloadList;
this.radSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.OverloadListWindow.Show();
VB.NET
Dim OverloadList As OverloadInfoCollection = New OverloadInfoCollection From
{
 New OverloadInfo("<html><font=Consolas><size=10><color=43,145,175>Span<color=Black>? <color=43,145,175>RadSyntaxEditor<color=Black>.Find(<color=Blue><b>string <color=Black>searchText</b>, <color=Blue>int <color=Black>startIndex)", "<html><font=Consolas><size=10>Finds the specified search text.<br><b><i>searchText:</b> The search text.</i>"),
 New OverloadInfo("signature2signature2signature2signature2signature2", "description2")
}

Me.RadSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.OverloadListWindow.Presenter.OverloadListItems = OverloadList
Me.RadSyntaxEditor1.SyntaxEditorElement.IntelliPrompts.OverloadListWindow.Show()

Figure 2: Code completion

WinForms RadSyntaxEditor Show Code completion