Question

我想将图像保存到我从数据库获取的图像路径，但是我得到了“Out Of Memory”错误。我正在做错误的以下代码？

cmd.CommandText = "SELECT imageColumn FROM PhotoTable WHERE id= :id";
cmd.ClearParameters();
cmd.Parameters.AddWithValue(":id", Id);
cmd.ExecuteDataReader();
if(cmd.DataReader.Read())
{  
   var lob = cmd.ExecuteReader().GetOracleLob(0);
   var image = new Bitmap(lob);
   picturebox1.Image = image;
   picturebox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
filePathName="c://image1.jpeg"//save path and file name 
var bm = new Bitmap(picturebox1.Image);
bm.Save(filePathName, System.Drawing.Imaging.ImageFormat.Jpeg);

Answer 1

您正在创建每行Bitmap。位图必须是Disposed。当你不再使用位图时，你应该处理它。您可以为图片框创建一个位图，并从其上绘制数据库中的位图。

<强>伪：

var pictureBoxBitmap = new Bitmap(width, height, ....);
picturebox1.Image = pictureBoxBitmap;
picturebox1.SizeMode = PictureBoxSizeMode.StretchImage;

using(Graphics pictureBoxGraphics = Graphics.FromImage(pictureBoxBitmap))  
{
    if(cmd.DataReader.Read())
    {  
       var lob = cmd.ExecuteReader().GetOracleLob(0);
       using(var image = new Bitmap(lob))
       {
            pictureBoxGraphics.DrawImage(..... image);
            pictureBox1.Refresh();
       }
   }
}

像这样的东西。

位图内存不足错误

1 个答案: