Question

我无法在PictureBox中加载位图图像。它给出了一个错误，说参数无效。

        Image up = Image.FromFile("somePath");
        Image down = Image.FromFile("anotherPath");

        using (down)
        {
            using(var bmp = new Bitmap(1000, 1000))
            {
                using(var canvas = Graphics.FromImage(bmp))
                {
                    canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
                    canvas.DrawImage(up, 0, 0);
                    canvas.DrawImage(down, 0, 500);
                    canvas.Save();
                    pictureBox1.Image = bmp;// this line gives the error
                } 
            }
        }

我的pictureBox的大小也是1000X1000。谁能告诉我哪里出错？

编辑1：错误说明：

System.ArgumentException：参数无效。在 System.Drawing.Image.get_Size（）中的System.Drawing.Image.get_Width（）在 System.Windows.Forms.PictureBox.ImageRectangleFromSizeMode（PictureBoxSizeMode 模式）在System.Windows.Forms.PictureBox.OnPaint（PaintEventArgs pe）在System.Windows.Forms.Control.PaintWithErrorHandling（PaintEventArgs System.Windows.Forms.Control.WmPaint（消息＆amp; m）中的e，Int16层）在System.Windows.Forms.Control.WndProc（Message＆amp; m）at System.Windows.Forms.Control.ControlNativeWindow.OnMessage（Message＆amp; m）在System.Windows.Forms.Control.ControlNativeWindow.WndProc（Message＆amp; m）在System.Windows.Forms.NativeWindow.Callback（IntPtr hWnd，Int32） msg，IntPtr wparam，IntPtr lparam）

Answer 1

删除bmp上的使用语句。因为，您的位图在pictureBox1.Image = bmp;之后处理，并且您在绘制事件时收到错误。

Image up = Image.FromFile("somePath");
Image down = Image.FromFile("anotherPath");

using (down)
{
    var bmp = new Bitmap(1000, 1000);
    using(var canvas = Graphics.FromImage(bmp))
    {
        canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
        canvas.DrawImage(up, 0, 0);
        canvas.DrawImage(down, 0, 500);
        canvas.Save();
        pictureBox1.Image = bmp;// this line gives the error
    } 
 }

未在图片框

1 个答案: