的WinForms表格不会关闭在C＃按X或关闭（） [英] WinForms Form won't close on pressing X or Close() in C#

问题描述

我在与WinForm的一点奇怪的问题，这似乎拒绝关闭了一些奇怪的原因。我有很简单的GUI有时不为我反应过来按X，或当我使用事件上的按钮甚至达到关闭（）和无助..

 私人无效buttonZapisz_Click（对象发件人，EventArgs五）{
串plik = textBoxDokumentDoZaladowania.Text; 
如果（File.Exists（plik））{
线延长= Path.GetExtension（plik）; 
串nazwaPliku = Path.GetFileName（plik）; 
 
 SqlMethods.databaseFilePut（plik，comboBoxTypDokumentu.Text，textBoxKomentarz.Text，sKlienciID，sPortfelID，推广，nazwaPliku）; 
关闭（）; 
} 
} 
  

有没有分配给 FormClosed 或的FormClosing 。所以，我怎么能找出什么是错的。有时，GUI被加载后，X将工作，但之后我按按钮来保存一些东西到数据库达到关闭（）在按钮的事件，它仍然是可见的，所以没有任何。不能用X，也不ALT + F4。我可以去周围GUI和选择组合框其它数值没有问题。

我把GUI是这样的：

 私人无效contextMenuDokumentyDodaj_Click（对象发件人，EventArgs五）{
 VAR LV =（ListView控件）contextMenuDokumenty.SourceControl; 
串varPortfelID = Locale.ustalDaneListViewKolumny（listViewNumeryUmow，0）; 
串varKlienciID = Locale.ustalDaneListViewKolumny（listViewKlienci，0）; 
 
如果（LV == listViewDokumentyPerKlient）{
如果（varKlienciID =！）{
变种dokumenty =新DocumentsGui（varKlienciID）; 
 dokumenty.Show（）; 
 dokumenty.FormClosed + = varDocumentsGuiKlienci_FormClosed; 
} 
}否则如果（LV == listViewDokumentyPerPortfel）{
如果（varPortfelID =！&放大器;&安培;！varKlienciID =）{
变种dokumenty =新DocumentsGui （varKlienciID，varPortfelID）; 
 dokumenty.Show（）; 
 dokumenty.FormClosed + = varDocumentsGuiPortfele_FormClosed; 
} 
} 
} 
  

虽然我不能关闭GUI我可以在主界面的工作没有问题了。我可以打开相同的GUI并打开新的GUI后，我可以很快将其关闭。 GUI是很简单的用几个组合框，文本框和一个 EditButton 从DevExpress的

编辑： varDocumentsGuiPortfele_FormClosed代码可以让我更新的GUI（重装ListView的具体情况取决于用户是在目前如此）。

 私人无效varDocumentsGuiPortfele_FormClosed（对象发件人，FormClosedEventArgs E）{
的TabControl varTabControl = tabControlKlientPortfele; 
 
如果（varTabControl.TabPages.IndexOf（tabPageDokumentyPerKlient）== varTabControl.SelectedIndex）{
 loadTabControlKlientPortfeleBezZmianyUmowy（）; 
 
} 
} 
  

解决方案

这段代码粘贴到你的表单类：

 保护覆盖无效OnFormClosing（FormClosingEventArgs E）{
é。取消= FALSE; 
 base.OnFormClosing（E）; 
} 
  

当这样的作品，你要找出为什么你已经验证事件处理程序不想被关闭的形式。

您想验证下一件事情就是调试+异常，剔为CLR异常的抛出该异常框。这可以确保你不下咽，防止形式从闭合异常。或者更糟的是，操作系统吞咽异常，一个讨厌Windows 7的问题。

I'm having a bit weird problem with WinForm which seems to refuse to close for some weird reason. I've got very simple gui which sometimes doesn't react for me pressing X or when i use events on buttons it even reaches Close() and does nothing..

    private void buttonZapisz_Click(object sender, EventArgs e) {
        string plik = textBoxDokumentDoZaladowania.Text;
        if (File.Exists(plik)) {
            string extension = Path.GetExtension(plik);
            string nazwaPliku = Path.GetFileName(plik);

            SqlMethods.databaseFilePut(plik, comboBoxTypDokumentu.Text, textBoxKomentarz.Text, sKlienciID, sPortfelID, extension, nazwaPliku);
            Close();
        }
    }

There are no events assigned to FormClosed or FormClosing. So how can I find out what's wrong. Sometimes X will work after the GUI is loaded but after i press Button to save some stuff to database it reaches Close() in that button event and it still is visible and does nothing. Can't use X, nor ALT+F4. I can go around GUI and choose other values for ComboBox without problem.

I call GUI like this:

    private void contextMenuDokumentyDodaj_Click(object sender, EventArgs e) {
        var lv = (ListView) contextMenuDokumenty.SourceControl;
        string varPortfelID = Locale.ustalDaneListViewKolumny(listViewNumeryUmow, 0);
        string varKlienciID = Locale.ustalDaneListViewKolumny(listViewKlienci, 0);

        if (lv == listViewDokumentyPerKlient) {
            if (varKlienciID != "") {
                var dokumenty = new DocumentsGui(varKlienciID);
                dokumenty.Show();
                dokumenty.FormClosed += varDocumentsGuiKlienci_FormClosed;
            }
        } else if (lv == listViewDokumentyPerPortfel) {
            if (varPortfelID != "" && varKlienciID != "") {
                var dokumenty = new DocumentsGui(varKlienciID, varPortfelID);
                dokumenty.Show();
                dokumenty.FormClosed += varDocumentsGuiPortfele_FormClosed;
            }
        } 
    }

While I can't close GUI i can work on the main gui without problem too. I can open up same GUI and after opening new GUI i can quickly close it. GUI is very simple with few ComboBoxes,TextBoxes and one EditButton from Devexpress.

Edit: varDocumentsGuiPortfele_FormClosed code allows me to refresh GUI (reload ListView's depending on where the user is on now).

    private void varDocumentsGuiPortfele_FormClosed(object sender, FormClosedEventArgs e) {
        TabControl varTabControl = tabControlKlientPortfele;

      if (varTabControl.TabPages.IndexOf(tabPageDokumentyPerKlient) == varTabControl.SelectedIndex) {
          loadTabControlKlientPortfeleBezZmianyUmowy();

      }
    }

解决方案

Paste this code into your form classes:

    protected override void OnFormClosing(FormClosingEventArgs e) {
        e.Cancel = false;
        base.OnFormClosing(e);
    }

When that works, you want to find out why you have Validating event handlers that don't want the form to be closed.

Next thing you want to verify is Debug + Exceptions, tick the Thrown box for CLR Exceptions. This makes sure you don't swallow an exception that prevents a form from closing. Or worse, the operating system swallowing the exception, a nasty Windows 7 problem.

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