我如何捕获此objectdisposedexception [英] How do I catch this objectdisposedexception

问题描述

我试图通过try-catch捕获异常，但它不起作用



我尝试了什么： < br $> b $ b

I've tried to catch the Exception by try-catch but it isn't works

What I have tried:

try
{
    form.Close();
    form.Show();
}
catch (ObjectDisposedException)
{
    form.Show();
}

推荐答案

无论我是否创建表单实例并尝试：

It works fine for me, regardless of if I create a form instance and try that:

private void Button1_Click(object sender, EventArgs e)
    {
    FrmMain form = new FrmMain();
    try
        {
        form.Close();
        form.Show();
        }
    catch (ObjectDisposedException)
        {
        form.Show();
        }
    }

或者我使用现有表格：

private void Button1_Click(object sender, EventArgs e)
    {
    try
        {
        Close();
        Show();
        }
    catch (ObjectDisposedException)
        {
        Show();
        }
    }

无论哪种方式，调试器都显示捕获工作正常。

我觉得你很困惑，因为你会得到当您尝试第二次显示表单时，catch处理程序中的相同异常。试试这个：

Either way, the debugger shows the catch working fine.
I think you are confused, because you will get an identical exception inside the catch handler when you try to Show the form for a second time. Try this:

private void Button1_Click(object sender, EventArgs e)
    {
    FrmMain form = new FrmMain();
    try
        {
        form.Close();
        form.Show();
        }
    catch (ObjectDisposedException ex)
        {
        MessageBox.Show(ex.Message);
        }
    }

它应该显示错误。

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