问Autocad .NET -展开命令行

EN

using Autodesk.Autocad.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;

private int AskUser(IEnumerable<string> userOptions)
{

        Document document= Application.DocumentManager.MdiActiveDocument;
        Editor editor = document.Editor;

        //Autocad's setting before you change
        bool originalSetting = CadApp.DisplayTextScreen;

        string message = "Available options:\n";
        message += string.join("\n",
            userOptions.Select((opt,i)=>i.ToString() + ": " + opt));
        message += "\nChoose an option"

        PromptIntegerOptions promptOptions = new PromptIntegerOptions(message);
        promptOptions.LowerLimit = 0;
        promptOptions.UpperLimit = userOptions.Count - 1;

        //display full command bar
        Application.DisplayTextScreen = true;
        var result = editor.GetInteger(promptOptions);

        int selection;
        if (result.Status == PromptStatus.OK)
            selection = result.Value;
        else
            selection = -1;

        //restore original setting
        Application.DisplayTextScreen = originalSetting;

        return selection;
}