FilterClearButton in Filtercell

[Dominik]

HI,

I want to add a "FilterClearButton" in every FilterCell. We are changing from Infragistics to Telerik and our users are familiar with that behaviour so I tried to create my own FilterCell but it was not working as expected. Everytime i click in my Filtercell, a EditorElement appears and my FilterClear button is not visible anymore. I think I have done smth wrong.

 

So has someone here tried anything similar?

Sincerely,

Dominik

[Dimitar]

Hello Dominik,

Here is a custom filter cell class that adds a button to the right:

class MyFilterCellElement : GridFilterCellElement
{

    public MyFilterCellElement(GridViewDataColumn column, GridRowElement row) : base(column, row)
    {

    }
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(GridFilterCellElement);
        }
    }
    RadButtonElement button = new RadButtonElement();
    protected override void CreateChildElements()
    {
        base.CreateChildElements();
        this.FilterButton.Margin = new Padding(-5, 0, 15, 0);


        button.ZIndex = 100;
        button.Text = "C";
        button.Click += Button_Click;
        this.Children.Add(button);
    }

    private void Button_Click(object sender, EventArgs e)
    {
        foreach (FilterDescriptor item in this.GridControl.FilterDescriptors.ToList())
        {
            if (item.PropertyName == this.ColumnInfo.FieldName)
            {
                this.GridControl.FilterDescriptors.Remove(item);
            }
        }

    }
    protected override SizeF ArrangeOverride(SizeF finalSize)
    {
        var res = base.ArrangeOverride(finalSize);
        var rect = new RectangleF(res.Width - button.DesiredSize.Width, (res.Height - button.DesiredSize.Height) / 2, button.DesiredSize.Width, button.DesiredSize.Height);
        button.Arrange(rect);
        return res;
    }
}

To change the cell you need to use the CreateCell event:

private void RadGridView1_CreateCell(object sender, GridViewCreateCellEventArgs e)
{
    if (e.CellType == typeof(GridFilterCellElement))
    {
        e.CellElement = new MyFilterCellElement(e.Column as GridViewDataColumn, e.Row);
    }


}

I hope this will be useful.

Regards,
Dimitar
Telerik by Progress

[Dominik]

Thanks a lot Dimitar,

 

that works just great.