Detailed description of the use of the C # message prompt box MessageBox

This article mainly introduces the C # message box MessageBox in detail and the use of relevant information, the need for friends can refer to the following

C # message prompt box in detail and use

The message dialog box is displayed with the show method of the MessageBox object. The MessageBox object is part of the namespace System.Windows.Forms, and show is a static method, which means that you do not need to create an instance based on the MessageBox class object to use this method. And the method can be overloaded, that is, the method can have a different parameter list form.

Results returned:DialogResult dr1=messagebox.show (text,caption,buttons,icon,defaultbutton,option);

does not return any value:MessageBox.Show (Text,caption,buttons,icon);

Parameters must be output in the order above

1,text: Sets the prompt text statement in the message dialog box. Must be of type string
2,caption: Optional parameter, set the caption of the message dialog box, must be a string type
3,buttons: Optional parameters to set which buttons are displayed in the message dialog box
4,icon: Optional parameter to set which icon is displayed in the message dialog box
5,defaultbutton: Optional parameter, set the message dialog box which button is activated by default
6,option Optional parameters, set special options for the message dialog box, such as text alignment, specifying reading order, and whether to write messages to the system log

Button enumeration constants and their meanings

Ok	Only the OK button in the message box
Okcancel	Only the OK and Cancel buttons in the message box
YesNo	Only "yes" and "no" buttons in message boxes
Yesnocancel	"Yes", "No" and "Cancel" buttons in the message box
Retrycancel	There are "Retry" and "Cancel" buttons in the message box
Abortretryignore	"Abort", "Retry" and "Ignore" buttons in the message box
Constant	Function and significance

Icon enumeration constants and their meanings

Enumeration constants	Functional significance
Error	A message box has a symbol that consists of a red background circle and a white x in it
Asterisk	The symbol is made up of a circle and the lowercase letter I
Exclamation	The symbol consists of a triangle with a yellow background and an exclamation mark in it.
Hand	The symbol consists of a circle with a red background and a white x in it
Question	The symbol consists of a circle and a question mark in it
None	The message box does not contain symbols
Information	The symbol is made up of a circle and the lowercase letter I
Stop	The symbol is made up of a red background circle and a white x in it
Warning	The symbol is made up of a yellow background triangle and an exclamation mark in it.

The return value of the message dialog box is a member of the System.Windows.Forms.DialogResult, and the enumeration constants and meanings are the following table

Abort	The return value of the message box is abort (abort), that is, the Abort button is clicked
Cancel	The return value of the message box is cancel (cancel), that is, the Cancel button is clicked
Ignore	The return value of the message box is "Ignore" (Ignore), that is, the Ignore button is clicked
No	The return value of the message box is no (no), that is, the No button is clicked
Ok	The return value of the message box is OK (OK), that is, the OK button is clicked
Retry	The return value of the message box is "Retry" (Retry), that is, the Retry button was clicked
None	The message box does not have any return value, that is, no button is clicked
Yes	The return value of the message box is Yes (yes), that is, the Yes button is clicked

Use:

1,/* if (flag)       {         DialogResult Diagorel = MessageBox.Show (This, "Please inpult again,your message is empty!",          "Information cue", Messageboxbuttons.retrycancel, messageboxicon.warning);         Switch (Diagorel)         {case           dialogresult.retry:             this.username.Text = "";             This.password.Text = "";             break;           Case DialogResult.Cancel: Break             ;         }       } */

2, the simplest way is this

if (MessageBox.Show ("OK to commit?"). "," hint ", messageboxbuttons.yesno) = = Dialogresult.yes)      {        program run code ...      }