using DialogMessage;if (DMessage.ShowMessage(// Window Title"Window Title",// Main Instruction"Want to learn how to write your own message box?",// Dialog buttonsDMessage.MsgButtons.YesNo,// Dialog IconsDMessage.MsgIcons.Question,// Content"In this project we will learn the logic necessary " +"to write your own dialog message box in Windows")// Checks DialogResult of the button clicked by user== DialogResult.Yes)// Show the Windows standard MessageBox to test resultMessageBox.Show("You clicked Yes!");elseMessageBox.Show("You clicked No!");

Form设计

// Form.Load event
private void DialogMessage_Load(object sender, EventArgs e)
{// Set the starting locations and sizes of the labels// Adjust the locations and sizes of the labels to properly show the information
}

DialogMessage.cs包含下面的以下三个代码块；一个  public static方法和两个enum：

// Message icon enum for switch statement in ShowMessage
// This will set the Image for the PictureBox
public enum MsgIcons
{None = 0,Question = 1,Info = 2,Warning = 3,Error = 4,Shield = 5
}

事件与方法

private void DialogMessage_Load(object sender, EventArgs e)
{// Once the ShowMessage function is called and the form appears// the code below makes the appropriate adjustments so the text appears properly// If no icon will be shown then shift the MainInstruction and Content // left to an appropriate location// Adjust the MaximumSize to compensate for the shift left.if (msgIcon.Visible == false){mainInstruction.Location = new Point(12, mainInstruction.Location.Y);mainInstruction.MaximumSize = new Size(353, 0);content.Location = new Point(12, content.Location.Y);content.MaximumSize = new Size(353, 0);}// Gets the Y location of the bottom of MainInstructionint mainInstructionBottom = mainInstruction.Location.Y + mainInstruction.Height;// Gets the Y location of the bottom of Contentint contentBottom = content.Location.Y + content.Height;// Offsets the top of Content from the bottom of MainInstructionint contentTop = mainInstructionBottom + 18; // 18 just looked nice to me// Sets new location of the top of Contentcontent.Location = new Point(content.Location.X, contentTop);if (content.Text == string.Empty)// If only MainInstruction is provided then make the form a little shorterHeight += (mainInstruction.Location.Y + mainInstruction.Height) - 50;elseHeight += (content.Location.Y + content.Height) - 60;
}

DialogMessage.cs中的ShowMessage方法：

public static DialogResult ShowMessage(string _windowTitle,string _mainInstruction,MsgButtons _msgButtons,MsgIcons _msgIcons = MsgIcons.None,string _content = "")
{// Creates a new instance of MainForm so we can set the properties of the controlsMainForm main = new MainForm();// Sets the initial height of the formmain.Height = 157;// Sets Window Titlemain.Text = _windowTitle;// Sets MainInstructionmain.mainInstruction.Text = _mainInstruction;// Sets Contentmain.content.Text = _content;// Sets the properties of the buttons based on which enum was providedswitch (_msgButtons){// Button1 is the left button// Button2 is the right buttoncase MsgButtons.OK:main.Button1.Visible = false;main.Button2.DialogResult = DialogResult.OK;main.Button2.Text = "OK";main.AcceptButton = main.Button2; main.Button2.TabIndex = 0;main.ActiveControl = main.Button2;break;case MsgButtons.OKCancel:main.Button1.DialogResult = DialogResult.OK;main.Button2.DialogResult = DialogResult.Cancel;main.Button1.Text = "OK";main.Button2.Text = "Cancel";main.AcceptButton = main.Button2; main.Button1.TabIndex = 1;main.Button2.TabIndex = 0;main.ActiveControl = main.Button2;break;case MsgButtons.YesNo:main.Button1.DialogResult = DialogResult.Yes;main.Button2.DialogResult = DialogResult.No;main.Button1.Text = "Yes";main.Button2.Text = "No";main.AcceptButton = main.Button2; main.Button1.TabIndex = 1;main.Button2.TabIndex = 0;main.ActiveControl = main.Button2;break;default:break;}// Sets the Image for the PictureBox based on which enum was providedif (_msgIcons != MsgIcons.None){main.msgIcon.Visible = true;switch (_msgIcons){case MsgIcons.Question:main.msgIcon.Image = SystemIcons.Question.ToBitmap();break;case MsgIcons.Info:main.msgIcon.Image = SystemIcons.Information.ToBitmap();break;case MsgIcons.Warning:main.msgIcon.Image = SystemIcons.Warning.ToBitmap();break;case MsgIcons.Error:main.msgIcon.Image = SystemIcons.Error.ToBitmap();break;case MsgIcons.Shield:main.msgIcon.Image = SystemIcons.Shield.ToBitmap();break;default:break;}}else{main.msgIcon.Visible = false;}// Shows the message and gets the result selected by the userreturn main.ShowDialog();
}

结论