圖片庫中未加載位圖

Question

我無法在PictureBox中加載位圖圖像。 它給我一個錯誤，指出參數無效。

        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。 誰能告訴我我要去哪里錯了？

編輯1：錯誤說明：

System.ArgumentException：參數無效。 在系統System.Windows.Forms.PictureBox.ImageRectangleFromSizeMode（PictureBoxSizeMode模式）在System.Windows.Forms.PictureBox.OnPaint（PaintEventArgs pe）在System.Windows.Forms.PictureBox.ImageRectangleFromSizeMode（PictureBoxSizeMode模式）在System.Drawing.Image.get_Size（）在System.Windows.Forms.Control.WmPaint（Message＆m）（位於System.Windows.Forms的System.Windows.Forms.Control.WmProint（Message＆m））處的.Windows.Forms.Control.PaintWithErrorHandling（PaintEventArgs e，Int16層） System.Windows.Forms上的Control.ControlNativeWindow.OnMessage（Message＆m）System.Windows.Forms.NativeWindow.Callback上的Control.ControlNativeWindow.WndProc（IntPtr hWnd，Int32 msg，IntPtr wparam，IntPtr lparam）

Answer 1

刪除bmp上的using語句。 因為，您的位圖被放置在pictureBox1.Image = bmp;之后pictureBox1.Image = bmp; 並且您在繪畫事件上收到錯誤消息。

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
    } 
 }