using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace PdfiumViewer.Demo { public partial class ExportBitmapsForm : Form { private int _dpiX; private int _dpiY; public int DpiX { get { return _dpiX; } } public int DpiY { get { return _dpiY; } } public ExportBitmapsForm() { InitializeComponent(); UpdateEnabled(); } private void _acceptButton_Click(object sender, EventArgs e) { DialogResult = DialogResult.OK; } private void _dpiX_TextChanged(object sender, EventArgs e) { UpdateEnabled(); } private void _dpiY_TextChanged(object sender, EventArgs e) { UpdateEnabled(); } private void UpdateEnabled() { _acceptButton.Enabled = int.TryParse(_dpiXTextBox.Text, out _dpiX) && int.TryParse(_dpiYTextBox.Text, out _dpiY); } } }