C#自定義無邊框MessageBox窗體

本例子中制作一個無邊框的MessageBox窗體

展示效果：

窗體設計

1.添加一個窗體繼承原生Form

public partial class MessageBoxEX : Form

2.屬性添加

        private string _titleText = "提示";

        public string TitleText
        {
            get { return _titleText; }
            set { _titleText = value; }
        }


        private string _contentText = "暫無信息!";

        public string ContentText
        {
            get { return _contentText; }
            set { _contentText = value; }
        }

3.事件添加

 /// <summary>
        /// 窗體load的時候講文本賦值給消息框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void MessageBoxEX_Load(object sender, EventArgs e)
        {
            if (this._contentText.Trim() != "")
            {
                this.lblTitalContent.Text = this._titleText;
                this.lblMessage.Text = this._contentText;
            }
        }
        /// <summary>
        /// 鼠標按下標題欄移動窗體
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void lblTitleBar_MouseDown(object sender, MouseEventArgs e)
        {
            //為當前的應用程序釋放鼠標捕獲
            ReleaseCapture();
            //發送消息﹐讓系統誤以為在標題欄上按下鼠標
            SendMessage((int)this.Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
        }

        /// <summary>
        /// 關閉按鈕
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnClose_Click(object sender, EventArgs e)
        {
            this.DialogResult = System.Windows.Forms.DialogResult.Cancel;
        }

        /// <summary>
        /// 確定按鈕事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOK_Click(object sender, EventArgs e)
        {
            this.DialogResult = System.Windows.Forms.DialogResult.OK;
        }

        /// <summary>
        /// 取消按鈕
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = System.Windows.Forms.DialogResult.Cancel;
        }

4.對外公共方法show設計 這里只填寫倆個（有需要可以自行修改）

public static DialogResult Show(string text)
        {
            MessageBoxEX msgbox = new MessageBoxEX(text);
            return msgbox.ShowDialog();
        }

        public static DialogResult Show(string title,string text)
        {
            MessageBoxEX msgbox = new MessageBoxEX(title,text);
            return msgbox.ShowDialog();
        }

5.添加單擊窗體標題欄移動窗體

       [DllImport("user32.dll", EntryPoint = "SendMessageA")]
        private static extern int SendMessage(int hwnd, int wMsg, int wParam, int lParam);

        [DllImport("user32.dll")]
        private static extern int ReleaseCapture();

        private const int WM_NCLBUTTONDOWN = 0XA1;   //.定義鼠標左鍵按下
        private const int HTCAPTION = 2;

        private void lblTitleBar_MouseDown(object sender, MouseEventArgs e)
        {
            //為當前的應用程序釋放鼠標捕獲
            ReleaseCapture();
            //發送消息﹐讓系統誤以為在標題欄上按下鼠標
            SendMessage((int)this.Handle, WM_NCLBUTTONDOWN, HTCAPTION, 0);
        }

效果展示：

 

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