C#创建不规则窗体的4种方式详解

// Set bitmap as the background image //将位图设置成窗体背景图片

form.BackgroundImage = bitmap; // Calculate the graphics path based on the bitmap supplied

//计算位图中不透明部分的边界 GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap);

// Apply new region //应用新的区域

form.Region = new Region(graphicsPath); }

// Check if we are dealing with Button here //当控件是button时

else if (control is System.Windows.Forms.Button) {

// Cast to a button object //强制转换为 button

Button button = (Button)control; // Do not show button text

//不显示button text button.Text = "";

// Change cursor to hand when over button

//改变 cursor的style button.Cursor = Cursors.Hand;

// Set background image of button //设置button的背景图片

button.BackgroundImage = bitmap;

// Calculate the graphics path based on the bitmap supplied //计算位图中不透明部分的边界

GraphicsPath graphicsPath = CalculateControlGraphicsPath(bitmap); // Apply new region

//应用新的区域 button.Region = new Region(graphicsPath);

} }

/// <summary> /// Calculate the graphics path that representing the figure in the bitmap

/// excluding the transparent color which is the top left pixel. /// //计算位图中不透明部分的边界

/// </summary> /// <param name="bitmap">The Bitmap object to calculate our graphics path from</param>