VSTO Word 内容控件 - 在运行时添加多个 RichTextContentControls

Question

我正在创建一个 Word 加载项，它允许用户选择 Word 文档中的各种文本，然后单击功能区上的按钮，该按钮将使用内容控件（富文本）包装该文本。最终这些内容控件将被映射到 XML。

到目前为止的代码是这样的：

public partial class Ribbon1
    {
        private RichTextContentControl titleRichTextControl;

        private void Ribbon1_Load(object sender, RibbonUIEventArgs e)
        {

        }

        private void addTitle_Click(object sender, RibbonControlEventArgs e)
        {
            AddRichTextControlAtSelection();
        }


        private void AddRichTextControlAtSelection()
        {
            word.Document currentDocument = Globals.ThisAddIn.Application.ActiveDocument;

           currentDocument.ActiveWindow.Selection.Range.Select();

           Document extendedDocument = Globals.Factory.GetVstoObject(currentDocument);

            titleRichTextControl = extendedDocument.Controls.AddRichTextContentControl("titleRichTextControl");
            titleRichTextControl.PlaceholderText = "Enter the title";
            titleRichTextControl.Title = "Title";
            titleRichTextControl.Tag = "title";

        }

    }

这一切都很好，它在第一次单击按钮时起作用。但是，如果有多个“标题”（在这种情况下）需要添加，并且用户再次按下按钮，则会引发错误：

The control cannot be added because a control with the name titleRichTextControl already exists in the Controls collection.

很清楚它为什么会抱怨，但我想不出正确的方法来允许多次单击按钮以生成多个相同类型（富文本内容控件）和相同名称（“标题"例如）。

谁能指点我正确的方向。

Answer 1

好吧，我最后就是这样做的：

private void addTitle_Click(object sender, RibbonControlEventArgs e)
        {
            AddRichTextControlAtSelection();
        }


        int count = 0;
        private void AddRichTextControlAtSelection()
        {
            word.Document currentDocument = Globals.ThisAddIn.Application.ActiveDocument;

            Document extendedDocument = Globals.Factory.GetVstoObject(currentDocument);

            if (currentDocument.ContentControls.Count > 0)
            {

                currentDocument.ActiveWindow.Selection.Range.HighlightColorIndex = word.WdColorIndex.wdYellow;
                currentDocument.ActiveWindow.Selection.Range.Select();

                richTextControls = new List<RichTextContentControl>(); 

                foreach (word.ContentControl nativeControl in currentDocument.ContentControls)
                {
                    if (nativeControl.Type == Microsoft.Office.Interop.Word.WdContentControlType.wdContentControlRichText) 
                    {
                        count++;
                        RichTextContentControl tempControl = extendedDocument.Controls.AddRichTextContentControl("VSTORichTextControl" + count.ToString());
                        richTextControls.Add(tempControl);
                        tempControl.Title = "Title";
                        tempControl.Tag = "title";

                        break;
                     }
                }
            }

            else
            {
                RichTextContentControl VSTORichTextControl;
                VSTORichTextControl = extendedDocument.Controls.AddRichTextContentControl("VSTORichTextControl");
                VSTORichTextControl.PlaceholderText = "Enter the DM title";
                VSTORichTextControl.Title = "Title";
                VSTORichTextControl.Tag = "title";
            }

        }