摘要： 今天又知道一个东东：剪切板！(Clipboard)_dictionary[TreeCommandEnum.Paste].Enabled = true; if (itemtag.oItemA is SubProject) { if (!Clipboard.ContainsData(ClipboardFormat.SUBPROJECT.ToString())) { _dictionary[TreeCommandEnum.Paste].Enabled = false; } } else if (itemtag.oItemA is UnitProject) { if (!Clipboard.Conta 阅读全文