获取手动抛出异常的消息

Question

我故意为特定场景抛出异常,但我会隐含地希望以字符串格式获取错误消息.我知道以下异常的一个重载是string message,但是如何访问该字符串？

这是相关的片段:

string errMsg;

private void Compress()
{
    if (sourcePath.EndsWith(".zip"))
    {
        throw new FileLoadException
                   ("File already compressed. Unzip the file and try again.");
        errMsg = //I want the above string here
    }
}

Answer 1

你的意思是这个:？

try
{
    throw new FileLoadException
               ("File already compressed. Unzip the file and try again.");
}
catch (Exception ex)
{
    errMsg = ex.GetBaseException().Message;
}