C # modify the accessibility properties

Type.GetProperty 方法

Get the current Type -specific attributes.

parameter

name

String

String containing the name of the property to be acquired.

bindingAttr

BindingFlags

Bitwise combination of enumeration values, these values ​​specify how to search.

Or if it is the Default , then return null.

return

PropertyInfo

Represent objects that meet the specified requirements of the property (if found); otherwise null.

 

Examples

The following example retrieves the type of user-defined classes, the class attribute to retrieve and display according to the specified attribute name binding constraints.

using System;
using System.Reflection;
class MyClass
{
    private int myProperty;
    // Declare MyProperty.
    public int MyProperty
    {
        get
        {
            return myProperty;
        }
        set
        {
            myProperty=value;
        }
    }
}
public class MyTypeClass
{
    public static void Main(string[] args)
    {
        try
        {
            // Get Type object of MyClass.
            Type myType=typeof(MyClass);       
            // Get the PropertyInfo by passing the property name and specifying the BindingFlags.
            PropertyInfo myPropInfo = myType.GetProperty("MyProperty", BindingFlags.Public | BindingFlags.Instance);
            // Display Name propety to console.
            Console.WriteLine("{0} is a property of MyClass.", myPropInfo.Name);
        }
        catch(NullReferenceException e)
        {
            Console.WriteLine("MyProperty does not exist in MyClass." +e.Message);
        }
    }
}

 

Need PropertyInfo.SetValue method

The method of setting the value of the specified attribute to modify the properties of the object visibility

 NameValueCollection paramsCollection = context.Request.Form;
                var propInfo = paramsCollection.GetType().GetProperty("IsReadOnly", BindingFlags.Instance | BindingFlags.NonPublic);
                propInfo.SetValue(paramsCollection, false, new object[] { });
                System.Collections.Specialized.NameObjectCollectionBase.KeysCollection keys = paramsCollection.Keys;

 

SetValue(Object, Object, BindingFlags, Binder, Object[], CultureInfo)

abnormal

ArgumentException

index Array does not contain the parameter type.

Or can not find the property's setvalue function.

Or valuecan not be converted PropertyType type.

TargetException

The object does not match the target type, it is an example of a property or properties, but objis null.

TargetParameterCountException

index It does not match the number of parameters in the number of parameters used in the index attribute.

MethodAccessException

Attempt to gain unauthorized access classes in private or protected method.

TargetInvocationException

Error setting property value. For example, an index for the specified attribute index value is out of range. InnerException property indicates the cause of the error.