当前上下文中不存在"NextPic"

Question

在用c#的时候，出现 当前上下文中不存在"NextPic"和"NewSize" 的问题，请高手指教！谢谢

Answer 1

 private void MPre_Click(object sender, EventArgs e)
        {
            ListView1.Visible = false;
            TreeView1.Visible = false;
            pictureBox2.Visible = true;
            pictureBox1.Visible = true;
            try
            {
                String myfile;
               NextPic = NextPic + 1;
               myfile = ListView1.Items[NextPic].Text;
                pictureBox2.SizeMode = PictureBoxSizeMode.AutoSize;
                Mold.Enabled = false;
                ToolBar1.Buttons[11].Enabled = false;
                Newsize = pictureBox2.Image.Size;
                pictureBox2.Image = System.Drawing.Image.FromFile(myfile);
            }
            catch
            {
                return;
            }         
        }

Answer 2

要先定义啊private void MPre_Click(object sender, EventArgs e)
        {           private int NextPic=0,Newsize =0;            ListView1.Visible = false;
            TreeView1.Visible = false;
            pictureBox2.Visible = true;
            pictureBox1.Visible = true;
            try
            {
                String myfile;
              NextPic = NextPic + 1;
              myfile = ListView1.Items[NextPic].Text;
                pictureBox2.SizeMode = PictureBoxSizeMode.AutoSize;
                Mold.Enabled = false;
                ToolBar1.Buttons[11].Enabled = false;
                Newsize = pictureBox2.Image.Size;
                pictureBox2.Image = System.Drawing.Image.FromFile(myfile);
            }
            catch
            {
                return;
            }        

Answer 3

恩 谢谢 还是有点问题无法将类型“System.Drawing.Size"隐式转换成int类型

Answer 4

System.Drawing.Size Newsize = pictureBox2.Image.Size;
那就这样用吧