using ComPDFKit.NativeMethod; using System.IO; using System.Reflection; using System.Windows; using System.Xml; using static ComPDFKit.NativeMethod.CPDFSDKVerifier; namespace viewer_ctrl_demo { public class SDKLicenseHelper { public string key = string.Empty; public string secret = string.Empty; public SDKLicenseHelper() { string sdkLicensePath = "SDKLicense.xml"; Assembly assembly = Assembly.GetExecutingAssembly(); XmlDocument xmlDocument = new XmlDocument(); xmlDocument.Load(sdkLicensePath); var node = xmlDocument.SelectSingleNode("License"); if (node != null ) { key = node.Attributes["key"].Value; secret = node.Attributes["secret"].Value; } } } /// /// Interaction logic for App.xaml /// /// public partial class App : Application { protected override void OnStartup(StartupEventArgs e) { string str = this.GetType().Assembly.Location; base.OnStartup(e); LicenseVerify(); } private static bool LicenseVerify() { bool result = false; try { result = CPDFSDKVerifier.LoadNativeLibrary(); if (!result) return false; } catch {} SDKLicenseHelper sdkLicenseHelper = new SDKLicenseHelper(); try { LicenseErrorCode verifyResult = CPDFSDKVerifier.LicenseVerify(sdkLicenseHelper.key, sdkLicenseHelper.secret); if (verifyResult != LicenseErrorCode.LICENSE_ERR_SUCCESS) return false; } catch { } return result; } } }