试图将事件日志列表输入到在dataGridView ()方法上获得错误的事件日志

Question

我需要在Windows中将事件日志( public static List<EventLogEntry> _LogEntries { get; private set; } )列表输入到dataGridView中。

当前问题:每次我调用方法ReadEventLog()时，它都会用异常打破未处理的'System.ArgumentException‘类型异常，出现在System.dll中的EventLog eventLog = new EventLog(EvlLocation);行中。

我先打开文件

    // Open the log file
    private void OpenFile()
    {
        string evlLocation = "";
        // Show file open dialog
        if (openFile.ShowDialog() == DialogResult.OK)
        {
            // Create a dataset for binding the data to the grid.
            ds = new DataSet("EventLog Entries");
            ds.Tables.Add("Events");
            ds.Tables["Events"].Columns.Add("ComputerName");
            ds.Tables["Events"].Columns.Add("EventId");
            ds.Tables["Events"].Columns.Add("EventType");
            ds.Tables["Events"].Columns.Add("SourceName");
            ds.Tables["Events"].Columns.Add("Message");
            // Start the processing as a background process
            evlLocation = openFile.FileName;
            parser.setLogLocation(openFile.FileName);
            worker.RunWorkerAsync(openFile.FileName);
        }
    }

//然后调用以下方法。

    // Bind the dataset to the grid.
    private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        parser.ReadEventLog();
        bs = new BindingSource(ds, "Events");
        Foo foo1 = new Foo("TEST PC");
        ComputerName.Add(foo1);

        bs.DataSource = parser._LogEntries;
        //Bind fooList to the dataGridView
        dataGridView1.DataSource = bs;

        this.Invoke(pbHandler, new object[] { 100, 100 });
    }

然后，当调用ReadEventLog()时，它会在下面的EventLog eventLog = new EventLog(EvlLocation); ReadEventLog()方法行中中断

    public static void ReadEventLog()
    {
        // Line in question below
        EventLog eventLog = new EventLog(EvlLocation);
        EventLogEntryCollection eventLogEntries = eventLog.Entries;
        int eventLogEntryCount = eventLogEntries.Count;
        for (int i = 0; i < eventLogEntries.Count; i++)
        {
            EventLogEntry entry = eventLog.Entries[i];
            //Do Some processing on the entry
        }
        _LogEntries = eventLogEntries.Cast<EventLogEntry>().ToList();
    }

Answer 1

在EventLog构造器(字符串) - public EventLog(string logName)的MSDN文档中，我们在异常下面阅读。

ArgumentException _日志名称无效。

在ReadEventLog()中，使用名为EvlLocation的参数构造EventLog。但是，在您所显示的代码中，没有任何地方可以初始化该属性。相反，在OpenFile()中初始化一个局部变量：

string evlLocation = "";
// ...
evlLocation = openFile.FileName;

1. 确保初始化EvlLocation。
2. 如果错误仍然存在，验证从openFile.FileName传递的字符串是有效的-因为构造函数似乎不一致。