问如何在C#中将文件对话框实例作为参数传递

EN

public YourClass
{    
    string name1 = String.Empty:

    //..... your code

    private void pictureBox1_Click(object sender, EventArgs e)
    {
        OpenFileDialog ofd1 = new OpenFileDialog();
        ofd1.Title = "Select User Profile Image";
        ofd1.Filter = "Image File(*.png;*.jpg;*.bmp;*.gif)|*.png;*.jpg;*.bmp;*.gif";
        if (ofd1.ShowDialog() == DialogResult.OK)
        {
            pictureBox1.Image = new Bitmap(ofd1.FileName);
            name1 = ofd1.FileName;
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
       Compare(name1,name2);
    }

    public void Compare(string bmp1, string bmp2, byte threshold = 3)
    {
        Bitmap firstBmp = (Bitmap)Image.FromFile(bmp1);
        Bitmap secondBmp = (Bitmap)Image.FromFile(bmp2);
        firstBmp.GetDifferenceImage(secondBmp, true);
        string result = string.Format("Difference: {0:0.0} %", firstBmp.PercentageDifference(secondBmp, threshold) * 100);
    }
}

public partial class YourForm : Form
{
    private string _imagePath1;
    private string _imagePath2;

   private void pictureBox1_Click(object sender, EventArgs e)
   {
        OpenFileDialog ofd1 = new OpenFileDialog();
        // ... your code
        if (ofd1.ShowDialog() == DialogResult.OK)
        {
             pictureBox1.Image = new Bitmap(ofd1.FileName);
             // SAVE PATH TO CLASS MEMBER
             _imagePath1 = ofd1.FileName;
        }
   }
   private void button1_Click(object sender, EventArgs e)
   {
        // USE CLASS MEMBERS
        Compare(_imagePath1, _imagePath2);
   }
}