C#图片拖入picturebox打开

private void Form1_Load(object sender, EventArgs e)  
        {  
            //这句代码不会抱错，但是需要手动输入，.net编辑器无法自动识别AllowDrop  
            this.pictureBox1.AllowDrop = true;  
        }  
           
        private void pictureBox1_DragDrop(object sender, DragEventArgs e)  
        {  
            string fileName = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();  
            this.pictureBox1.Image = Image.FromFile(fileName);  
        }  
        private void pictureBox1_DragEnter(object sender, DragEventArgs e)  
        {  
            if (e.Data.GetDataPresent(DataFormats.FileDrop))  
                e.Effect = DragDropEffects.Link;  
            else e.Effect = DragDropEffects.None;   
        } 
}