爲什麼圖像沒有在圖片框中拉伸？

Question

我相對較新的圖像處理在C＃中。我試圖在一個圖片框中縮放這個動態構造的BMP，但圖像沒有被調整大小。我想要BMP來填充整個圖片框。圖片框是555 x 555.它只是顯示了原始大小（100 x 100）的BMP。有任何想法嗎？

private void Form1_Load(object sender, EventArgs e) 
{ 
    pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; 
} 

private void pictureBox1_Paint(object sender, PaintEventArgs e) 
{ 
    Graphics gPB = e.Graphics; 

    Bitmap bmp = new Bitmap(100, 100); 
    Graphics gBmp = Graphics.FromImage(bmp); 


    Brush whiteBrush = new SolidBrush(Color.White); 
    gBmp.FillRectangle(whiteBrush, 0, 0, bmp.Width, bmp.Height); 

    Brush redBrush = new SolidBrush(Color.IndianRed); 
    gBmp.FillRectangle(redBrush, 0, 0, 20f, 20f); 

    Brush greenBrush = new SolidBrush(Color.MediumSeaGreen); 
    gBmp.FillRectangle(greenBrush, 20, 0, 20f, 20f); 

    Brush blueBrush = new SolidBrush(Color.MediumSlateBlue); 
    gBmp.FillRectangle(blueBrush, 0, 20, 20f, 20f); 

    Brush yellowBrush = new SolidBrush(Color.LightYellow); 
    gBmp.FillRectangle(yellowBrush, 20, 20, 20f, 20f); 

    gPB.DrawImage(bmp, 0, 0, bmp.Width, bmp.Height); 

    pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; 
} 

我也試過Zoom SizeMode。這沒有任何區別。

Answer 1

您可以使用.NET的Interpolation屬性。看到這裏： http://msdn.microsoft.com/en-us/library/system.drawing.graphics.interpolationmode.aspx

gPB.InterpolationMode = InterpolationMode.NearestNeighbor; 
gPB.DrawImage(bmp, 0, 0, 555, 555);