winform界面

 1.选择加签pdf按钮代码实现

private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog op = new OpenFileDialog();
            op.Filter = "PDF文件(*.pdf)|*.pdf";
            bool flag = op.ShowDialog() == DialogResult.OK;
            if (flag)
            {
                string pdfPath = Path.GetFullPath(op.FileName);
                 fileName = op.SafeFileName;
                label2.Text = pdfPath;
            }
        }

每页加签按钮代码实现

private void button2_Click(object sender, EventArgs e)
        {
          string path = Application.StartupPath;
          SignEachPage(label2.Text.ToString(), path + "/PDF/" + fileName, path + @"\InspectionSeal\电子章.png");  // 参数