C#Windows基本类相关 [英] C# windows base Class related

问题描述

大家好，
我对以下代码有些困惑

Hi All,
I have some confusion on the following code

try
{

}
catch (Exception ex)
            {
                con.Close();
                MessageBox.Show(ex.Message);
            }

如果我用逗号替换''.''

If I replace the ''.'' with a comma

MessageBox.Show(ex.Message);

具有

MessageBox.Show(ex,Message);

它显示了不同的东西，任何人都可以定义吗?


谢谢&问候
Indrajit dasgupta

添加了代码块，总体上保持整洁-OriginalGriff [/edit]

It shows different thing, can any one please define this?


Thanks & regards
Indrajit dasgupta

[edit]Code blocks added, general tidy up- OriginalGriff[/edit]

推荐答案

在方法定义中添加逗号时，会得到一个参数列表可以进入该方法.
这是智能感知的一部分，目的是帮助用户选择适当的重载方法.

如果输入."，则会获得可用于该对象的成员列表.

When you put a comma in the method definition, you get a list of parameters you can enter into that method.
This is part of intellisense in order to help the user choose the appropriate overloaded methods.

If you put a ".", you get a list of members that you can use for that object.

public static DialogResult Show(
	string text,
	string caption,
	MessageBoxButtons buttons,
	MessageBoxIcon icon,
	MessageBoxDefaultButton defaultButton,
	MessageBoxOptions options,
	string helpFilePath
)

这些是MessageBox参数.

当你打电话

these are MessageBox parameters.

when you call

MessageBox.Show(ex.Message);

仅显示字符串文本.

当你打电话

Only string text is Displayed.

when you call

MessageBox.Show(ex,Message);

字符串文本，
显示字符串标题

string text,
string caption are displayed

MessageBox的Show方法有很多重载:
通过将.''替换为"，您试图使用具有两个参数的重载.
编译器可能会抱怨无法将异常强制转换为IWin32Window

MessageBox has a number of overloads for the Show method:
By replacing the ''.'' with '','' you are trying to use an overload with two parameters.
The compiler will probably complain that it cannot cast an Exception to a IWin32Window

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