错误提示内容：

{System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.
   at ESRI.ArcGIS.Display.AlgorithmicColorRampClass.CreateRamp(Boolean& ok) ...

 写了一个简单的函数：

public IColorRamp CreateColorRamp(IColor fromColor, IColor toColor, int count){　　IAlgorithmicColorRamp pRampColor;　　bool ok = true;　　pRampColor = new AlgorithmicColorRampClass();　　pRampColor.FromColor = fromColor;　　pRampColor.ToColor = toColor;    // ... missing size sentence 　　pRampColor.CreateRamp(out ok);　　return pRampColor as IColorRamp;}

后来仔细检查代码，发现在以上黄色语句处少了pRampColor.Size = count;这句话，导致创建彩色条带的失败。但是仅仅给出“Error HRESULT E_FAIL has been returned from a call to a COM component.”这样的错误，我对ArcGIS的异常提示也是醉了，鬼知道这是什么错误。所以说在不考虑ArcGIS那几处优秀的设计地方外，可以说ArcGIS这个系统软件做的十分烂。

备注一下，省的以后再被ArcGIS这样的错误弄的一头雾水。

ArcGIS “Error HRESULT E_FAIL has been returned from a call to a COM component.” 异常的解决