ValidatedMobileControlConverter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Design / Converters / ValidatedMobileControlConverter.cs / 1305376 / ValidatedMobileControlConverter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.Design.MobileControls.Converters 
{ 
    using System.Diagnostics;
    using System.Collections; 
    using System.ComponentModel;
    using System.Web.UI;
    using System.Web.UI.Design.MobileControls.Adapters;
    using System.Web.UI.MobileControls; 

    [ 
        System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, 
        Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)
    ] 
    [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
    internal class ValidatedMobileControlConverter: StringConverter
    {
        private Form GetContainingForm(MobileControl mc) 
        {
            return FindContainer(mc, typeof(Form)) as Form; 
        } 

        private StyleSheet GetContainingStyleSheet(MobileControl mc) 
        {
            return FindContainer(mc, typeof(StyleSheet)) as StyleSheet;
        }
 
        private Control FindContainer(MobileControl mc, Type containerType)
        { 
            for (Control control = mc; control != null; control = control.Parent) 
            {
                if (containerType.IsAssignableFrom(control.GetType())) 
                {
                    return control;
                }
            } 
            return null;
        } 
 
        protected virtual Object [] GetValidatableControls(Object instance)
        { 
            System.Web.UI.MobileControls.BaseValidator thisValidator = null;

            if (instance is Array)
            { 
                Array controlList = (Array)instance;
                Debug.Assert(controlList.Length > 0); 
 
                thisValidator = (BaseValidator) controlList.GetValue(0);
                Form firstForm = GetContainingForm(thisValidator); 

                for (int i = 1; i < controlList.Length; i++)
                {
                    BaseValidator validator = (BaseValidator)controlList.GetValue(i); 
                    if (GetContainingForm(validator) != firstForm)
                    { 
                        return null; 
                    }
                } 
            }

            if (instance is System.Web.UI.MobileControls.BaseValidator)
            { 
                thisValidator = (System.Web.UI.MobileControls.BaseValidator) instance;
            } 
            else if (instance is ChoicePropertyFilter) 
            {
                IDeviceSpecificDesigner designer = 
                    ((ChoicePropertyFilter)instance).Designer;

                thisValidator = designer.UnderlyingObject
                    as System.Web.UI.MobileControls.BaseValidator; 
            }
 
            if (thisValidator == null) 
            {
                Debug.Fail("Unsupported object passed in"); 
                return null;
            }

            ArrayList controlArray = new ArrayList(); 

            if (GetContainingStyleSheet(thisValidator) != null) 
            { 
                ISite site = thisValidator.Site;
                IContainer container = null; 

                if (site != null)
                {
                    container = site.Container; 
                    Debug.Assert(container != null);
 
                    foreach(IComponent component in container.Components) 
                    {
                        Control control = component as Control; 
                        if (control != null && CanBeValidated(control))
                        {
                            controlArray.Add(control.ID);
                        } 
                    }
                } 
            } 
            else
            { 
                Form parentForm = GetContainingForm(thisValidator);

                if (parentForm != null)
                { 
                    ExtractValidatableControls(parentForm, controlArray);
                } 
                else 
                {
                    return null; 
                }
            }

            controlArray.Sort(); 
            return controlArray.ToArray();
        } 
 
        private void ExtractValidatableControls(Control parent, ArrayList controlArray)
        { 
            foreach (Control control in parent.Controls)
            {
                if (CanBeValidated(control))
                { 
                    controlArray.Add(control.ID);
                } 
                if (!(control is Form)) 
                {
                    ExtractValidatableControls(control, controlArray); 
                }
            }
        }
 
        private bool CanBeValidated(Control control)
        { 
            // Control must have an ID 
            if (control.ID == null || control.ID.Length == 0)
            { 
                return false;
            }

            // Control must have a ValidationProperty attribute 
            ValidationPropertyAttribute valProp =
                (ValidationPropertyAttribute) 
                TypeDescriptor.GetAttributes(control)[typeof(ValidationPropertyAttribute)]; 

            if (null != valProp && null != valProp.Name) 
            {
                return true;
            }
 
            return false;
        } 
 
        /// 
        ///     
        ///       Returns a collection of standard values retrieved from the context specified
        ///       by the specified type descriptor.
        ///    
        ///  
        /// 
        ///    A type descriptor that specifies the location of the context to convert from. 
        ///  
        /// 
        ///     
        ///       A StandardValuesCollection that represents the standard values collected from
        ///       the specified context.
        ///    
        ///  
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
        { 
            if (context == null || context.Instance == null) 
            {
                return null; 
            }

            Object [] objValues = GetValidatableControls(context.Instance);
            if (objValues != null) 
            {
                return new StandardValuesCollection(objValues); 
            } 
            else
            { 
                return null;
            }
        }
 
        /// 
        ///     
        ///       Gets whether 
        ///       or not the context specified contains exclusive standard values.
        ///     
        /// 
        /// 
        ///    A type descriptor that indicates the context to convert from.
        ///  
        /// 
        ///     
        ///     if the specified context contains exclusive standard 
        ///       values, otherwise .
        ///     
        /// 
        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
        {
            return false; 
        }
 
        ///  
        ///    
        ///       Gets whether or not the specified context contains supported standard 
        ///       values.
        ///    
        /// 
        ///  
        ///    A type descriptor that indicates the context to convert from.
        ///  
        ///  
        ///    
        ///     if the specified context conatins supported standard 
        ///       values, otherwise .
        ///    
        /// 
        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) 
        {
            return true; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ValidatedMobileControlConverter.cs source code in C# .NET

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