CompositeFilterDescriptor To FilterDescriptor Conversion issues

[Sairam]

Hi support Team,

 In Kendo ui Grid ...I am Apply the Composite Filter ...But Problem with The ...Here in Filter ....I have some  "True" or "False"  Column ......Instead of Showing The "True"  ...."Y" and "False" ...."N"...So  I am Apply Following Logic For that 

 C# Code When User Gives  "Y" or "N"....based on That  .....setting True or False.

   private static void addFilter(XElement newFilter, FilterDescriptor firstFilter, string crmAttributeName, GetCrmColumnName getColumnInfo)
     {
            if (firstFilter.Member == "OnHold")
         {
                if (firstFilter.Value.ToString().ToLower() == "y")
                {
                    firstFilter.Value = true;
                }
                else if (firstFilter.Value.ToString().ToLower() == "n")
                {
                    firstFilter.Value = false;
                }
            }
                newFilter.Add(new XElement("condition",
                    new XAttribute("attribute", crmAttributeName),
                    new XAttribute("operator", getOperator(firstFilter.Operator, crmAttributeName)),
                    new XAttribute("value", String.Format(getOperatorFormat(firstFilter.Operator), firstFilter.Value.ToString().Trim()))));           
        }

 After Result Came I Need To ..Assign Same "Y" or "N"

So I Write The Following code

    foreach (var n in request.Filters)
            {           
                    if (((FilterDescriptor)(n)).Member == "OnHold")
                    {
                        if (((FilterDescriptor)(n)).Value.ToString().ToLower() == "true")
                        {
                            ((FilterDescriptor)(n)).Value = "y";
                        }
                        else
                        {
                            ((FilterDescriptor)(n)).Value = "n";
                        }
                    
                }          
            }

 

It Work Fine ....For Normal Filter ...When ...I suppose ....Use CompositeFilter Then  I got Problem....If ...Work with Composite Filter ..I need Display ...Not Empty or an error...

 

 

  foreach (var n in request.Filters)
            {
                if (n is CompositeFilterDescriptor==true)
                {
                    if (((CompositeFilterDescriptor)(n)).FilterDescriptors.Count() >= 2)
                    {
                     
                    }
                }
                else
                {       
                    if (((FilterDescriptor)(n)).Member == "OnHold")
                    {
                        if (((FilterDescriptor)(n)).Value.ToString().ToLower() == "true")
                        {
                            ((FilterDescriptor)(n)).Value = "y";
                        }
                        else
                        {
                            ((FilterDescriptor)(n)).Value = "n";
                        }
                    }
                }          
            }

Currently.....It  Work For Composite Filter also..But when .....we Include Filter Of "Y" or "N".....I got ...Problem....When User Give even Though ..."Y" or "N"...Columns in the Composite Filter.....We need to Display....matched Columns.....

 

 

[Rosen]

Hello Sairam,

I'm afraid I'm not sure what your are trying to achieve nor what it the exact issue you are facing. However, if you want to extract only the member filter descriptors you can do this by recursively looping over the filter hierarchy. Using similar to the following extension method:

 

public static class EnumerableExtensions
{
    public static IEnumerable<FilterDescriptor> SelectMemberDescriptors(this IEnumerable<IFilterDescriptor> descriptors)
    {
        return descriptors.SelectRecursive(f => GetChildDescriptors(f)).OfType<FilterDescriptor>();
    }

    private static IEnumerable<IFilterDescriptor> GetChildDescriptors(IFilterDescriptor f)
    {
        if (f is CompositeFilterDescriptor)
        {
            return ((CompositeFilterDescriptor)f).FilterDescriptors;
        }
        return null;
    }

    public static IEnumerable<TSource> SelectRecursive<TSource>(this IEnumerable<TSource> source,
        Func<TSource, IEnumerable<TSource>> recursiveSelector)
    {
        Stack<IEnumerator<TSource>> stack = new Stack<IEnumerator<TSource>>();
        stack.Push(source.GetEnumerator());

        try
        {
            while (stack.Count > 0)
            {
                if (stack.Peek().MoveNext())
                {
                    TSource current = stack.Peek().Current;

                    yield return current;

                    IEnumerable<TSource> children = recursiveSelector(current);
                    if (children != null)
                    {
                        stack.Push(children.GetEnumerator());
                    }
                }
                else
                {
                    stack.Pop().Dispose();
                }
            }
        }
        finally
        {
            while (stack.Count > 0)
            {
                stack.Pop().Dispose();
            }
        }
    }
}

and it usage:

if (request.Filters.Any())
{
    foreach (var filter in request.Filters.SelectMemberDescriptors())
    {
        if (filter.Member == "OnHold")
        {
         //...
        }
    }
}

 

Regards,
Rosen
Telerik

 

 

[Sairam]

Thanks  Rosen u r help...I am try it Different ....Working fine ...Change The filter  Member 

    private void ModifyFilters(IEnumerable<IFilterDescriptor> filters)
        {
            if (filters.Any())
            {
                foreach (var filter in filters)
                {
                    var descriptor = filter as FilterDescriptor;

                                if (descriptor != null && descriptor.Member == "PurchaseOrderDateTime")
                    {
                        descriptor.Member = "PurchaseOrderDate";
                    }

 else if (descriptor != null && descriptor.Member == "OnHold")
                    {
                        descriptor.Member = "OnHoldBool";
                    }

                   else if (filter is CompositeFilterDescriptor)
                    {
                        ModifyFilters(((CompositeFilterDescriptor)filter).FilterDescriptors);
                    }

}

}

}