Winform GDI 系列(2) 窗体边框重绘制

原创于 2018-02-03 17:23:01 发布 · 867 阅读

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本文介绍了一种自定义窗体边框颜色的方法，并提供了一个实用的Panel拖动窗体的技术实现。通过使用.NET Framework的绘图功能，可以轻松地为窗体添加个性化的边框样式。此外，还展示了如何利用API函数实现拖动指定的Panel来移动整个窗体，这对于创建无边框窗口应用非常有用。

///<summary>

///窗体边框重绘制

///</summary>

///<param name="sender"></param>

///<param name="e"></param>

privatevoid Form1_Paint(object sender,PaintEventArgs e)

{

///自定义绘制边框颜色

//e.Graphics.DrawRectangle(Pens.DarkOliveGreen,0, 0, this.Width - 1, this.Height - 1);

e.Graphics.DrawRectangle(Common.FromCustomStyle.CustomFormBorder(),0, 0,this.Width -1, this.Height - 1);

}

2.Panel移动可拖动窗体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Common
{
    public static class FromCustomStyle
    {
        ///<summary>

        ///拖动Panel窗体移动

        ///</summary>

        ///<param name="form1">窗口实例</param>

        ///<param name="panel1">要拖动的Panel</param>

        ///<summary>

        ///拖动Panel窗体移动

        ///</summary>

        ///<param name="form1">窗口实例</param>

        ///<param name="panel1">要拖动的Panel</param>

        public static void MoveForm(Form form1, System.Windows.Forms.Panel panel1)

        {
            ReleaseCapture();
            SendMessage(form1.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);//*********************调用移动无窗体控件函数 
        }

        //定义无边框窗体Form 

        [DllImport("user32.dll")]//*********************拖动无窗体的控件 

        public static extern bool ReleaseCapture();

        [DllImport("user32.dll")]

        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);

        public const int WM_SYSCOMMAND = 0x0112;

        public const int SC_MOVE = 0xF010;

        public const int HTCAPTION = 0x0002;

    }
}