Excel exception HRESULT: 0x800A03EC from ChartArea

问题:

I'm working on a C# Application thats interacts with an Excel instance using excel interop.dll v11.0. I'm using the following code to copy a chart from the excel worksheet to the clipboard:

public Image ReadChart(Chart chartAccess) {
    try {
        Microsoft.Office.Interop.Excel.Worksheet sheet = workbook.Sheets[chartAccess.Sheet.Name];
        Microsoft.Office.Interop.Excel.ChartObject chart = sheet.ChartObjects(chartAccess.Name);
        chart.Chart.ChartArea.Copy();  // exception gets thrown here 
        return System.Windows.Forms.Clipboard.GetImage();
    } catch (COMException) {
        // display error dialog etc...
    }

This worked fine with Excel 2007. However since switching to Excel 2013 the function ChartArea.Copy() results in the following COMExceptions being thrown:

Message:      "Dimension not valid for chart type"
Stack Trace:  System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)
              Microsoft.Office.Interop.Excel.ChartArea.Copy()

Message:      "HRESULT: 0x800A03EC"
Stack Trace:  System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)
              Microsoft.Office.Interop.Excel.ChartArea.Copy()

This only happens with excel sheets of the old .xls format, xlsm / xlsx files work fine. Using newer versions of interop.dll (v14.0 and v15.0) didn't help.

Any help is appreciated!

EDIT:

I resolved the Problem using the following workaround:

// ...
chart.Chart.activate();
chart.Chart.Export(filename, "PNG", false);
using (Stream reader = File.OpenRead(filename)) {
    image = Image.fromStream(stream);
}
return image;

回答1:

The documentation for Copy shows that there is a difference between versions 2003 and 2010.

2003:

void Copy(
    [In, Optional] object Before, 
    [In, Optional] object After
);

2010:

void Copy(
    Object Before,
    Object After
)

As you can see, the arguments were optional in 2003, and mandatory in later version.

回答2:

chart.Chart.ChartArea.Cut(); instead of copy you can use cut it wont give any exception