CallbackValidatorAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Configuration / System / Configuration / CallbackValidatorAttribute.cs / 1305376 / CallbackValidatorAttribute.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

using System; 
using System.Configuration.Internal; 
using System.Collections;
using System.Collections.Specialized; 
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Security.Permissions; 
using System.Xml;
using System.Globalization; 
using System.ComponentModel; 
using System.Security;
using System.Text; 

namespace System.Configuration {

    [AttributeUsage(AttributeTargets.Property)] 
    public sealed class CallbackValidatorAttribute : ConfigurationValidatorAttribute {
        private Type _type = null; 
        private String _callbackMethodName = String.Empty; 
        private ValidatorCallback _callbackMethod;
 
        public override ConfigurationValidatorBase ValidatorInstance {
            get {
                if (_callbackMethod == null) {
                    if (_type == null) { 
                        throw new ArgumentNullException("Type");
                    } 
                    if (!String.IsNullOrEmpty(_callbackMethodName)) { 
                        MethodInfo methodInfo = _type.GetMethod(_callbackMethodName, BindingFlags.Public | BindingFlags.Static);
                        if (methodInfo != null) { 
                            ParameterInfo[] parameters = methodInfo.GetParameters();
                            if ((parameters.Length == 1) && (parameters[0].ParameterType == typeof(Object))) {
                                _callbackMethod = (ValidatorCallback)Delegate.CreateDelegate(typeof(ValidatorCallback), methodInfo);
                            } 
                        }
                    } 
                } 
                if (_callbackMethod == null) {
                    throw new System.ArgumentException(SR.GetString(SR.Validator_method_not_found, _callbackMethodName)); 
                }

                return new CallbackValidator(_callbackMethod);
            } 
        }
 
        public CallbackValidatorAttribute() { 
        }
 
        public Type Type {
            get {
                return _type;
            } 
            set {
                _type = value; 
                _callbackMethod = null; 
            }
        } 

        public String CallbackMethodName {
            get {
                return _callbackMethodName; 
            }
            set { 
                _callbackMethodName = value; 
                _callbackMethod = null;
            } 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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