Delegate change control filtering

In Flexberry ASP.NET there is a delegate change control filter (at the moment the modification is available for the DatePicker) WebObjectListView.

How does the delegate: a filtering module creates the controls for filtering by WebControlProvider, where the delegate is invoked.

namespace ICSSoft.STORMNET.Web.Tools
{
    public class WebControlProvider
    {
        /// <summary> 
        /// Delegate that allows you to adjust the control after it is created. 
        /// </summary> 
        public TuneControlDelegate TuneControlDelegateMethod;
		
		...
    }
}

CreatedControlData

CreatedControlData is a special structure, reporting to the delegate, how and what was created by the control:

namespace ICSSoft.STORMNET.Web.Tools
{
    public class CreatedControlData
    {
		...
        /// <summary> 
        /// List of options the reasons for the creation of controls. 
        /// </summary> 
        public enum CreateControlReason
        {
            /// <summary> 
            /// This control for filtering in WebObjectListView. 
            /// </summary> 
            Filter
        }

        /// <summary> 
        /// The reason for creating control. 
        /// </summary> 
        public CreateControlReason ControlCreationReason { get; private set; }

        /// <summary> 
        /// The property type for which you created the control. 
        /// </summary> 
        public Type PropertyType { get; private set; }

        /// <summary> 
        /// The name of the property for which control is created. 
        /// </summary> 
        public string PropertyName { get; private set; }

        /// <summary> 
        /// Type containing the property, for which the control is created. 
        /// </summary> 
        public Type DataObjectType { get; private set; }
    }
}

Example

A delegate can be defined as follows:

/// <summary> 
/// Event handler for the initialization is complete. 
/// </summary> 
/// <param name="e">event Parameters.</param> 
protected override void OnInitComplete(EventArgs e)
{
	base.OnInitComplete(e);
	WebObjectListView1.WebControlProvider.TuneControlDelegateMethod = ChangeControlDelegateMethod;
}

/// <summary> 
/// The delegate that will change tuning controls for display of dates in the filter string. 
/// </summary> 
/// <param name="control">the control.</param> 
/// <param name="changeControlDelegateData">parameters to create the control (which was created).</param> 
private void ChangeControlDelegateMethod(Control control, CreatedControlData changeControlDelegateData)  
{  
	if (control is DatePicker  
  	    && changeControlDelegateData.ControlCreationReason  
            == CreatedControlData.CreateControlReason.Filter  
            && changeControlDelegateData.DataObjectType == typeof(TestChangeControlDelegate)  
            && changeControlDelegateData.PropertyName  
            == Information.ExtractPropertyPath<TestChangeControlDelegate>(x => x.DateTimePropertyWithDelegate))  
        {  
        	var datePicker = (DatePicker)control;  
        	datePicker.OnlyDate = false;  
        	datePicker.DateFormat = "This field cannot be filtered.";  
        	datePicker.TimeFormat = string.Empty;  
        }  
}  

In the filter control, the corresponding property will be available DateTimePropertyWithDelegate specifies the date and in the filter will be displayed “this field cannot be filtered”.

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