小编Cha*_*ake的帖子

我正在尝试使用 C# 将下拉列表添加到范围。

这就是我到目前为止所做的。

 Worksheet ws = PPTAddIn.thisAddin2Obj.Application.ActiveWorkbook.ActiveSheet;
            ws.get_Range("a1").Validation.Delete();
            ws.get_Range("a1").Validation.InCellDropdown = true;
            ws.get_Range("a1").Validation.IgnoreBlank = true;
            ws.get_Range("a1").Validation.Add(XlDVType.xlValidateList, XlDVAlertStyle.xlValidAlertWarning, "opt1,opt2,opt3", Missing.Value);

在代码的第三行，它抛出以下异常
Exception from HRESULT: 0x800A03EC

这是堆栈跟踪

   at System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)    at Microsoft.Office.Interop.Excel.Validation.set_InCellDropdown(Boolean ) at MS.ProductionPlanningTool.Excel.Ribbon_PPT.ribbon_signin_Click(Object sender, RibbonControlEventArgs e) in D:\MidasCloud\CloudTFS\ProductionPlanning\MSP2\MS.ProductionPlanningTool.Excel\UI\Ribbon_PPT.cs:line 1328    at Microsoft.Office.Tools.Ribbon.RibbonPropertyStorage.ControlActionRaise(IRibbonControl control)    at Microsoft.Office.Tools.Ribbon.RibbonPropertyStorage.ButtonClickCallback(RibbonComponentImpl component, Object[] args)    at Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.Invoke(RibbonComponentCallback callback, Object[] args)    at Microsoft.Office.Tools.Ribbon.RibbonMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)    at Microsoft.Office.Tools.Ribbon.RibbonManagerImpl.System.Reflection.IReflect.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, …