// </Snippet1>
// Create a DnsPermission instance that is the intersection of current
// DnsPermission instance and the specified DnsPermission instance.
private void MyIntersection()
{
DnsPermission permission = (DnsPermission)dnsPermission1.Intersect(dnsPermission2);
// Print the attributes and the values of the intersection instance of
// DnsPermission.
PrintKeysAndValues(permission.ToXml().Attributes);
}
// <Snippet1>
private void MyUnion()
{
// Create a DnsPermission instance that is the union of the current DnsPermission
// instance and the specified DnsPermission instance.
DnsPermission permission = (DnsPermission)dnsPermission1.Union(dnsPermission2);
// Print the attributes and the values of the union instance of DnsPermission.
PrintKeysAndValues(permission.ToXml().Attributes);
}
public void FromXml_WrongVersion()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
se.Attributes.Remove("version");
se.Attributes.Add("version", "2");
dp.FromXml(se);
}
public void FromXml_WrongTagCase()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
se.Tag = "IPERMISSION"; // instead of IPermission
dp.FromXml(se);
// note: normally IPermission classes (in corlib) DO care about the
// IPermission tag
}
public void FromXml_NoVersion()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
SecurityElement w = new SecurityElement(se.Tag);
w.AddAttribute("class", se.Attribute("class"));
dp.FromXml(w);
}
public void FromXml_WrongTag()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
se.Tag = "IMono";
dp.FromXml(se);
// note: normally IPermission classes (in corlib) DO care about the
// IPermission tag
}
// <Snippet1>
public void ConstructDnsPermission()
{
try
{
// Create a DnsPermission instance.
DnsPermission permission = new DnsPermission(PermissionState.None);
// Create a SecurityElement instance by calling the ToXml method on the
// DnsPermission instance.
// Print its attributes, which hold the XML encoding of the DnsPermission
// instance.
Console.WriteLine("Attributes and Values of 'DnsPermission' instance :");
PrintKeysAndValues(permission.ToXml().Attributes);
// Create a SecurityElement instance.
SecurityElement securityElementObj = new SecurityElement("IPermission");
// Add attributes and values of the SecurityElement instance corresponding to
// the permission instance.
securityElementObj.AddAttribute("version", "1");
securityElementObj.AddAttribute("Unrestricted", "true");
securityElementObj.AddAttribute("class", "System.Net.DnsPermission");
// Reconstruct a DnsPermission instance from an XML encoding.
DnsPermission permission1 = new DnsPermission(PermissionState.None);
permission1.FromXml(securityElementObj);
// Print the attributes and values of the constructed DnsPermission object.
Console.WriteLine("After reconstruction Attributes and Values of new DnsPermission instance :");
PrintKeysAndValues(permission1.ToXml().Attributes);
}
catch (NullReferenceException e)
{
Console.WriteLine("NullReferenceException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch (SecurityException e)
{
Console.WriteLine("SecurityException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch (ArgumentNullException e)
{
Console.WriteLine("ArgumentNullException caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
catch (Exception e)
{
Console.WriteLine("Exception caught!!!");
Console.WriteLine("Source : " + e.Source);
Console.WriteLine("Message : " + e.Message);
}
}
public static void Main(string[] args)
{
DnsPermission permission = new DnsPermission(System.Security.Permissions.PermissionState.Unrestricted);
permission.Demand();
//创建一个SecurityElement对象来控制DnsPermission实例
SecurityElement securityElementObj = permission.ToXml();
Console.WriteLine("Tag,Attributes and Values of 'DnsPermission' instance :");
//输出属性名称和值
PrintKeysAndValues(securityElementObj.Attributes);
}
public void FromXml_NoClass()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
SecurityElement w = new SecurityElement(se.Tag);
w.AddAttribute("version", se.Attribute("version"));
dp.FromXml(w);
// note: normally IPermission classes (in corlib) DO NOT care about
// attribute "class" name presence in the XML
}
public void FromXml_WrongClass()
{
DnsPermission dp = new DnsPermission(PermissionState.None);
SecurityElement se = dp.ToXml();
SecurityElement w = new SecurityElement(se.Tag);
w.AddAttribute("class", "Wrong" + se.Attribute("class"));
w.AddAttribute("version", se.Attribute("version"));
dp.FromXml(w);
// doesn't care of the class name at that stage
// anyway the class has already be created so...
}
// <Snippet1>
public void useDns()
{
// Create a DnsPermission instance.
DnsPermission permission = new DnsPermission(PermissionState.Unrestricted);
// Check for permission.
permission.Demand();
// Create a SecurityElement object to hold XML encoding of the DnsPermission instance.
SecurityElement securityElementObj = permission.ToXml();
Console.WriteLine("Tag, Attributes and Values of 'DnsPermission' instance :");
Console.WriteLine("\n\tTag :" + securityElementObj.Tag);
// Print the attributes and values.
PrintKeysAndValues(securityElementObj.Attributes);
}
// <Snippet1>
public void useDns()
{
// Create a DnsPermission instance.
permission = new DnsPermission(PermissionState.Unrestricted);
DnsPermission dnsPermission1 = new DnsPermission(PermissionState.None);
// Check for permission.
permission.Demand();
dnsPermission1.Demand();
// Print the attributes and values.
Console.WriteLine("Attributes and Values of 'DnsPermission' instance :");
PrintKeysAndValues(permission.ToXml().Attributes);
Console.WriteLine("Attributes and Values of specified 'DnsPermission' instance :");
PrintKeysAndValues(dnsPermission1.ToXml().Attributes);
Subset(dnsPermission1);
}
// <Snippet1>
public void UseDns()
{
// Create a DnsPermission instance.
DnsPermission myPermission = new DnsPermission(PermissionState.Unrestricted);
// Check for permission.
myPermission.Demand();
// Create an identical copy of the above 'DnsPermission' object.
DnsPermission myPermissionCopy = (DnsPermission)myPermission.Copy();
Console.WriteLine("Attributes and Values of 'DnsPermission' instance :");
// Print the attributes and values.
PrintKeysAndValues(myPermission.ToXml().Attributes);
Console.WriteLine("Attribute and values of copied instance :");
PrintKeysAndValues(myPermissionCopy.ToXml().Attributes);
}
// <Snippet2>
public void useDns()
{
// Create a DnsPermission instance.
dnsPermission1 = new DnsPermission(PermissionState.Unrestricted);
dnsPermission2 = new DnsPermission(PermissionState.None);
// Check for permission.
dnsPermission1.Demand();
dnsPermission2.Demand();
Console.WriteLine("Attributes and Values of first DnsPermission instance :");
PrintKeysAndValues(dnsPermission1.ToXml().Attributes);
Console.WriteLine("Attributes and Values of second DnsPermission instance :");
PrintKeysAndValues(dnsPermission2.ToXml().Attributes);
Console.WriteLine("Union of both instances : ");
MyUnion();
Console.WriteLine("Intersection of both instances : ");
MyIntersection();
}
public void PermissionState_None()
{
PermissionState ps = PermissionState.None;
DnsPermission dp = new DnsPermission(ps);
Assert.IsFalse(dp.IsUnrestricted(), "IsUnrestricted");
SecurityElement se = dp.ToXml();
// only class and version are present
Assert.AreEqual(2, se.Attributes.Count, "Xml-Attributes#");
Assert.IsNull(se.Children, "Xml-Children");
DnsPermission copy = (DnsPermission)dp.Copy();
Assert.IsFalse(Object.ReferenceEquals(dp, copy), "ReferenceEquals");
Assert.AreEqual(dp.IsUnrestricted(), copy.IsUnrestricted(), "IsUnrestricted ()");
}
public void PermissionState_Unrestricted()
{
PermissionState ps = PermissionState.Unrestricted;
DnsPermission dp = new DnsPermission(ps);
Assert.IsTrue(dp.IsUnrestricted(), "IsUnrestricted");
SecurityElement se = dp.ToXml();
Assert.AreEqual("true", se.Attribute("Unrestricted"), "Xml-Unrestricted");
Assert.AreEqual(3, se.Attributes.Count, "Xml-Attributes#");
Assert.IsNull(se.Children, "Xml-Children");
DnsPermission copy = (DnsPermission)dp.Copy();
Assert.IsFalse(Object.ReferenceEquals(dp, copy), "ReferenceEquals");
Assert.AreEqual(dp.IsUnrestricted(), copy.IsUnrestricted(), "IsUnrestricted ()");
}
// <Snippet1>
public void useDns()
{
// Create a DnsPermission instance.
DnsPermission permission = new DnsPermission(PermissionState.Unrestricted);
// Check for permission.
permission.Demand();
Console.WriteLine("Attributes and Values of DnsPermission instance :");
// Print the attributes and values.
PrintKeysAndValues(permission.ToXml().Attributes);
// Check the permission state.
if (permission.IsUnrestricted())
{
Console.WriteLine("Overall permissions : Unrestricted");
}
else
{
Console.WriteLine("Overall permissions : Restricted");
}
}