为什么ShowDialog的总是返回DialogResult.Cancel？ [英] Why does ShowDialog always return DialogResult.Cancel?

问题描述

我有一个定制对话框的winform。对此我有一个标签，文本框和2个按钮（确定和取消）。它还声明和定义重载执行方法传递不同的参数列表。

I have a custom made dialog winform. On it I have a label, textbox and 2 buttons (OK and Cancel). It also declares and defines overloaded execute methods for passing different parameter list.

对话框的Winform被称为如下：

Dialog Winform is called as follows:

var theDialog := new InputMsgBox;

if theInputB.Execute('Awesome StackOverflow','Enter Text?',s,var s) = DialogResult.OK then
begin
  Invalidate;
  SetText(s);
end;

对话框的Winform执行定义如下：

Dialog Winform execute is defined as follow:

method InputMsgBox.Execute(Title, theMessage, defaultanswer:string;var thevalue:string): DialogResult;
begin
    result := DialogResult.Cancel;

    Requesttext.Text:=themessage;
    Requesttext.Enabled:=true;
    Requesttext.Visible:=true;
    InputTextBox.Text:=defaultanswer;
    InputTextBox.Enabled:=true;
    InputTextBox.Visible:=true;

    CancelBtn.Enabled:=true;
    CancelBtn.Visible:=true;
    Okbtn.Enabled:=true;
    Okbtn.Visible:=true;

    self.ShowDialog;
    Result := self.DialogResult;
    thevalue:=InputTextBox.Text;
end;

在执行方法返回给调用者，它总是返回DialogResult.Cancel甚至当你点击OKBtn。

When execute method returns back to the caller, it always returns DialogResult.Cancel even when you click on OKBtn.

按钮DialogResult的相应设置。

The Buttons' dialogresult are set accordingly.

我已经设置了AcceptButton和CancelButton在对话框的winform。

I have set the AcceptButton and CancelButton on the Dialog winform.

我不明白，为什么ShowDialog方法总是返回DialogResult.Cancel。

I can't figure out why the showdialog method is always returning DialogResult.Cancel.

更新做了一些测试后，我发现我的其他定制对话框窗口工作正常时，显示通过调用ShowDialog的= DialogResult.Ok。所以，我检查他们两个，看看是否有在他们的性能有一定的差异的设置也绝对没有什么区别。我不明白。 在此先感谢，

UPDATE After doing some test, I found out that my other custom-made dialog window works fine when display by calling showdialog = DialogResult.Ok. So, I checked both of them to see if there are some differences in their properties setting and there is absolutely no difference. I don't understand it. Thanks in advance,

推荐答案

我想通了，我的问题。这就是为什么对话形式始终返回取消的DialogResult。对于我定做的对话窗口，我还实施Form_Closing事件的方法。很显然，你是不是有这种开放使用ShowDialog方法对话框时，会跳转程序计数器出其步骤的事件。因此，它已经关闭之前，它有机会读到它的DialogResult。因此，我的程序只看到默认的DialogResult我的对话窗口。

I figured out my problem. This is why Dialog Form always returned Cancel DialogResult. For my custom-made dialog window, I also implemented Form_Closing event method. Apparently, you are not to have an event that will jump the program counter out of its steps when opening a dialog using ShowDialog method. So, it was already closed before it got a chance to read its DialogResult. Therefore, my program only saw the default DialogResult for my Dialog Window.

在我删除了Form_Closing事件方法，它工作的方式，它应该是。

Once I removed the Form_Closing event method, it is working the way it is supposed to.

不是删除的问题，我回答它，我觉得这会帮助别人。

Instead of deleting the question, I am answering it and I feel it will help others.

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