首页 > 代码库 > MessageBox Class

MessageBox Class

Displays a message box that can contain text, buttons, and symbols that inform and instruct the user.

MessageBoxButtons.YesNo

 

const string message = "您想删除当前记录吗?";                const string caption = "删除当前记录";                var result = MessageBox.Show(message, caption, MessageBoxButtons.YesNo, MessageBoxIcon.Question);                if (result == DialogResult.Yes)                {                    //delete the current record                }
View Code

 

 

private void Form1_FormClosing(object sender, FormClosingEventArgs e){    const string message =        "Are you sure that you would like to close the form?";    const string caption = "Form Closing";    var result = MessageBox.Show(message, caption,                                 MessageBoxButtons.YesNo,                                 MessageBoxIcon.Question);    // If the no button was pressed ...     if (result == DialogResult.No)    {        // cancel the closure of the form.        e.Cancel = true;    }}

 

 

 

private void validateUserEntry()	{		// Checks the value of the text. 		if(serverName.Text.Length == 0)		{			// Initializes the variables to pass to the MessageBox.Show method. 			string message = "You did not enter a server name. Cancel this operation?";                        string caption = "Error Detected in Input";			MessageBoxButtons buttons = MessageBoxButtons.YesNo;			DialogResult result;			// Displays the MessageBox.			result = MessageBox.Show(message, caption, buttons);			if (result == System.Windows.Forms.DialogResult.Yes)			{				// Closes the parent form. 				this.Close();			}		}	}

 

 

// Handles the ComboBox1 DropDown event. If the user expands the   	// drop-down box, a message box will appear, recommending the 	// typical installation. 	private void ComboBox1_DropDown(object sender, System.EventArgs e)	{		MessageBox.Show("Typical installation is strongly recommended.", 		"Install information", MessageBoxButtons.OK, 			MessageBoxIcon.Information);	}

 

MessageBoxButtons Enumeration

 

 

 Member nameDescription
 AbortRetryIgnoreThe message box contains Abort, Retry, and Ignore buttons.
 OKThe message box contains an OK button.
 OKCancelThe message box contains OK and Cancel buttons.
 RetryCancelThe message box contains Retry and Cancel buttons.
 YesNoThe message box contains Yes and No buttons.
 YesNoCancelThe message box contains Yes, No, and Cancel buttons.

 MessageBoxIcon Enumeration

Member nameDescription
 AsteriskThe message box contains a symbol consisting of a lowercase letter i in a circle.
 ErrorThe message box contains a symbol consisting of white X in a circle with a red background.
 ExclamationThe message box contains a symbol consisting of an exclamation point in a triangle with a yellow background.
 HandThe message box contains a symbol consisting of a white X in a circle with a red background.
 InformationThe message box contains a symbol consisting of a lowercase letter i in a circle.
 NoneThe message box contain no symbols.
 QuestionThe message box contains a symbol consisting of a question mark in a circle. The question-mark message icon is no longer recommended because it does not clearly represent a specific type of message and because the phrasing of a message as a question could apply to any message type. In addition, users can confuse the message symbol question mark with Help information. Therefore, do not use this question mark message symbol in your message boxes. The system continues to support its inclusion only for backward compatibility.
 StopThe message box contains a symbol consisting of white X in a circle with a red background.
 WarningThe message box contains a symbol consisting of an exclamation point in a triangle with a yellow background.

 DialogResult

Member nameDescription
 AbortThe dialog box return value is Abort (usually sent from a button labeled Abort).
 CancelThe dialog box return value is Cancel (usually sent from a button labeled Cancel).
 IgnoreThe dialog box return value is Ignore (usually sent from a button labeled Ignore).
 NoThe dialog box return value is No (usually sent from a button labeled No).
 NoneNothing is returned from the dialog box. This means that the modal dialog continues running.
 OKThe dialog box return value is OK (usually sent from a button labeled OK).
 RetryThe dialog box return value is Retry (usually sent from a button labeled Retry).
 YesThe dialog box return value is Yes (usually sent from a button labeled Yes).

 

if(dr == DialogResult.Cancel){    e.Cancel = true;}else{    if(dr == DialogResult.Yes)    {         //Save the data    }}

 

DialogResult dr = MessageBox.Show("Do You Want to Save Data?", "", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);                if (dr == DialogResult.Yes)                {                    //e.Cancel = false ;                 }                else if (dr == DialogResult.Cancel)                {                    //e.cancel = true ;                 }                else                {                }
View Code