c# – 异常没有陷入catch块

我有一个try,catch和finally块的函数.如果捕获到异常,那么我会捕获该异常的某些参数,例如其错误代码,错误详细消息和消息,并将其打印在excel文件中.我发布以下相关代码：

public void UpdateGroup(String strSiteID,String strGroup,int row)
        {
            try
            {
                Console.WriteLine("UpdateGroup");
                Excel1.MWMClient.MWMServiceProxy.Group group = new Excel1.MWMClient.MWMServiceProxy.Group();
                group.name = "plumber";
                group.description = "he is a plumber";  
                Console.WriteLine(groupClient.UpdateGroup(strSiteID,group));
                ExcelRecorder(0,null,row);
            }
            catch (System.ServiceModel.FaultException<DefaultFaultContract> ex)
            {
                ExcelRecorder(ex.Detail.ErrorCode,ex.Detail.Message,ex.Message,row);
            }
            finally
            {
                System.GC.Collect();
            }
        }



public void ExcelRecorder(int error,string detailmessage,string message,int row)
        {  
            Excel.Application xlApp = new Excel.Application();               
            Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"D:/WebServiceTestCases_Output.xlsx");
            Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
            Excel.Range xlRange = xlWorksheet.UsedRange;           
                if (!string.IsNullOrEmpty(message))
                {
                    ((Range)xlWorksheet.Cells[row,"M"]).Value2 = "FAIL";
                    ((Range)xlWorksheet.Cells[row,"N"]).Value2 = error;
                    ((Range)xlWorksheet.Cells[row,"O"]).Value2 = detailmessage;
                    ((Range)xlWorksheet.Cells[row,"P"]).Value2 = message;
                }
                else
                {
                    ((Range)xlWorksheet.Cells[row,"M"]).Value2 = "PASS";
                    ((Range)xlWorksheet.Cells[row,"N"]).Value2 = "";
                    ((Range)xlWorksheet.Cells[row,"O"]).Value2 = "";
                    ((Range)xlWorksheet.Cells[row,"P"]).Value2 = "";
                }
            xlWorkbook.Save();
            xlWorkbook.Close(0,0);
            xlApp.Quit();
        }

问题是,早些时候我有一段代码就像

catch(Exception ex)
{
ExcelRecorder(ex.Message);
}

那时,所有例外都被抓住了.但是,后来需求发生了变化,因为我还需要捕获错误详细信息代码和错误详细信息.所以,我用catch(System.ServiceModel.FaultException ex)改变了我的catch块,因为它允许我获取那些参数.但是现在,某些例外情况并没有被捕获.如何更改我的catch块以便能够捕获所有异常？

解决方法

基本上有两种方式：

1：两个捕获块(最具体的第一个)：

catch (System.ServiceModel.FaultException<DefaultFaultContract> ex)
{
    ExcelRecorder(ex.Detail.ErrorCode,row);
}
catch (Exception ex)
{
    // Todo: simpler error handler
}

2：一个带有测试的catch块：

catch (Exception ex)
{
    var fault = ex as System.ServiceModel.FaultException<DefaultFaultContract>;
    if(fault != null)
    {
        ExcelRecorder(fault.Detail.ErrorCode,fault.Detail.Message,fault.Message,row);
    }
    // Todo: common error handling steps
}

要么可以工作.第一个可能更干净,但是如果你想在捕获物内部做很多常见的事情,第二个可能有优势.