C#控件美化之路（12）：c# dialogresult 选择文件_自定义消息弹出框

在软件开发中，很多地方需要用到与用户消息提醒，用form绘制一个自己消息框。

首先在界面上绘制两个按钮，在之前文章有教程绘制一个button方法，也可以直接使用系统。

私有属性

        #region 私有属性        
        private string message;      
        private MesBoxIcon mesIcon;     
        #endregion

公有属性

        #region 公有属性   
        public MesBoxIcon MesIcon   
        {      
            get => mesIcon;   
            set           
        {            
            mesIcon = value;   
            this.Invalidate();
            if (value == MesBoxIcon.Info)  
        {                
            wenImageButton1.Visible = false;    
        }    
        }      
        }     
        public string Message     
        {          
            get => message; 
            set         
        {            
            message = value;    
            Graphics g = this.CreateGraphics();        
            SizeF sizef = g.MeasureString(value, this.Font);      
            int width =(int) sizef.Width + this.FrameWidth * 2 + 80;  
            int height = this.TitleHeight + this.FrameWidth + panel1.Height;     
            this.Size = new Size(this.Width < width ? width : this.Width, this.Height < height ? height : this.Height);   
            this.Invalidate();         
        }     
        }    
        #endregion

MesBoxIcon 消息类型选择

找到与自己需要绘制的图档

        public enum MesBoxIcon { Asterisk, Error, Info, Warning, }

采用GDI绘制消息框

        protected override void OnPaint(PaintEventArgs e) 
        { base.OnPaint(e); 
            Rectangle rec = new Rectangle(this.FrameWidth, this.TitleHeight, this.Width - this.FrameWidth * 2, this.Height - this.TitleHeight - this.FrameWidth - panel1.Height);
            Rectangle recStr = new Rectangle(rec.X + 70, rec.Y, rec.Width - 70, rec.Height); Rectangle recIco = new Rectangle(rec.X + 5, rec.Y + (rec.Height - 60) / 2, 60, 60);
            Graphics g = e.Graphics; g.DrawString(Message, Font, new SolidBrush(this.ForeColor), recStr, WenSkin.Controls.ControlHelper.StringConters); 
            switch (MesIcon) 
            { 
                case MesBoxIcon.Asterisk: 
                    g.DrawImage(Properties.Resources.Asterisk, recIco);
                    break;
                case MesBoxIcon.Error:     
                    g.DrawImage(Properties.Resources.error, recIco); 
                    break; 
                case MesBoxIcon.Info:     
                    g.DrawImage(Properties.Resources.Info, recIco); 
                    break; 
                case MesBoxIcon.Warning:     
                    g.DrawImage(Properties.Resources.Warning, recIco);
                    break; 
                default:      
                    break;
            }
        }

两个按钮点击事件

        private void wenImageButton2_Click(object sender, EventArgs e) 
        { this.DialogResult = DialogResult.OK; }      
        private void wenImageButton1_Click(object sender, EventArgs e) 
        { this.DialogResult = DialogResult.Cancel; }

可以根据自己需求更改。

多个构造函数示例

public MesBox() 
{ 
    InitializeComponent();
    this.SizeChanged += (s, e) =>     
    {
        if (wenImageButton1 != null)    
            wenImageButton1.Width = (this.Width - this.FrameWidth * 2) / 2;      
    }; 
    Text = "消息";    
    mesIcon = MesBoxIcon.Info;   
    this.StartPosition = FormStartPosition.CenterScreen;   
}
public MesBox(string text) : this()
{
    Message = text;    
}  
public MesBox(string text,MesBoxIcon mesBoxIcon) : this(text)   
{
    MesIcon = mesBoxIcon;
    switch (MesIcon)
{
    case MesBoxIcon.Asterisk:    
        Text = "提醒";  
        break;
    case MesBoxIcon.Error:     
        Text = "错误";
        break;  
    case MesBoxIcon.Info:    
        Text = "消息";    
        break; 
    case MesBoxIcon.Warning:     
        Text = "警告";
        break;      
    default:    
        break;             
}
}   
public MesBox(string text,string caption, MesBoxIcon mesBoxIcon) : this(text)    
{
    Text = caption;      
}

至此，一个自主弹窗绘制完成

接下来调用

        var m = new MesBox(text, MesBox.MesBoxIcon.Asterisk).ShowDialog();
        if (m == DialogResult.OK) 
            true;
        else 
            false;

一行代码即可，是不是很方便。

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