BindToTypePolicy.QueryNonTrustedTypeValidationEventArgs.DoNotTrustThisType() Method

Specifies that the custom (“unknown”) type is “unsafe” and throws a security warning.

Namespace: DevExpress.Utils

Assembly: DevExpress.Data.v24.1.dll

NuGet Package: DevExpress.Data

Declaration

C#

public void DoNotTrustThisType()

VB.NET

Public Sub DoNotTrustThisType

Remarks

The following example validates custom data types:

C#

using System;
using System.Windows.Forms;

namespace DXApplication {
    internal static class Program {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            DevExpress.Utils.BindToTypePolicy.QueryNonTrustedTypeValidation += BindToTypePolicy_QueryNonTrustedTypeValidation;
            Application.Run(new Form1());
        }
        private static void BindToTypePolicy_QueryNonTrustedTypeValidation(object sender, DevExpress.Utils.BindToTypePolicy.QueryNonTrustedTypeValidationEventArgs e) {
            if (e.IsUnsafe)
                throw new MyAppLicationSecurityException(e.AssemblyQualifiedTypeName);
            if (e.AssemblyName == typeof(Program).Assembly.FullName)
                e.TrustThisType();
            if (e.TypeName == "ObsoleteJsonDataSource")
                e.DoNotTrustThisType();
        }
    }
}

VB.NET

Imports System
Imports System.Windows.Forms

Namespace DXApplication
    Friend Module Program
        ''' <summary>
        ''' The main entry point for the application.
        ''' </summary>
        <STAThread>
        Sub Main()
            Application.EnableVisualStyles()
            Application.SetCompatibleTextRenderingDefault(False)
            AddHandler DevExpress.Utils.BindToTypePolicy.QueryNonTrustedTypeValidation, AddressOf BindToTypePolicy_QueryNonTrustedTypeValidation
            Application.Run(New Form1())
        End Sub
        Private Sub BindToTypePolicy_QueryNonTrustedTypeValidation(ByVal sender As Object, ByVal e As DevExpress.Utils.BindToTypePolicy.QueryNonTrustedTypeValidationEventArgs)
            If e.IsUnsafe Then
                Throw New MyAppLicationSecurityException(e.AssemblyQualifiedTypeName)
            End If
            If e.AssemblyName = GetType(Program).Assembly.FullName Then
                e.TrustThisType()
            End If
            If e.TypeName = "ObsoleteJsonDataSource" Then
                e.DoNotTrustThisType()
            End If
        End Sub
    End Module
End Namespace