Clear CheckList Filtering

[Chaim]

Hi

I was looking at this: http://www.telerik.com/help/aspnet-ajax/grid-filtering-multi-select-filtering.html
and this: http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/filter-templates/defaultcs.aspx

But I wanted to create a "Clear Filters" button, the second link gives an example... and it works... more or less..
It clears all the filters, but the Checklist keeps its old values, so whenever I choose a new filter after clearing... the grid will apply the old filters (since the checklists are still checked)

Is there a way to revert the checklist to its original state??? (in this case to "(Select All)"

Thanks!

[Chaim]

Adding "column.CurrentFilterFunction = GridKnownFunction.NoFilter;"
won't filter next time using those filters... but this happens

1: Filter by checkin 2 checkboxes in column A
2: Grid is filtered
3: Clear Filters
4: Grid returns all rows unfiltered
5: Open again filter for columns A
6: Those 2 checkboxes from step 1 are still checked
7: Filter by Columns B
8: Grid is filtered ONLY by column B (Even though checkboxes for column A were checked (with NoFilter))
9: Open filters for columna A
10: (Select All) is selected

so it seems that when a NoFilter is applied, it should select "Select All" but since I'm doing it from codeBehind, it doesn't happen until the rebind from selecting another filter

[Kostadin]

Hello Oscar,

Thank you for contacting us.

You could use a EvaluateFilterExpression() method and pass the GridFilteringItem in order to clear the filter. Please check out the following code snippet.

protected void Button1_Click(object sender, EventArgs e)
{
    RadGrid2.MasterTableView.FilterExpression = string.Empty;
    foreach (GridColumn column in RadGrid2.MasterTableView.RenderColumns)
    {
        if (column is GridBoundColumn)
        {
            GridBoundColumn boundColumn = column as GridBoundColumn;
            GridFilteringItem filter = RadGrid2.MasterTableView.GetItems(GridItemType.FilteringItem)[0] as GridFilteringItem;
            boundColumn.EvaluateFilterExpression(filter);
        }
    }
    RadGrid2.Rebind();
}

Regards,
Kostadin
Telerik

[Chaim]

Hi Kostadin

I tried your suggestion... but I think it didn't work... here is my code (after your suggestion) (I use GridColumn because I also want to reset FilterTemplates)

protected void LimpiarFiltros()
    {
        rgDiscrepancias.MasterTableView.FilterExpression = string.Empty;

        foreach (GridColumn columna in rgDiscrepancias.MasterTableView.RenderColumns)
        {
            GridFilteringItem filter = rgDiscrepancias.MasterTableView.GetItems(GridItemType.FilteringItem)[0] as GridFilteringItem;
            columna.EvaluateFilterExpression(filter);
        }

        rgDiscrepancias.Rebind();
    }

Now... When I filter, I get the expected result
When I Clean Filters, I get the expected grid contents... but not what I would expect on the filters section

The first attached file is how the filters look
1. Before I apply filters
2. ------
3. After filters have been cleared

[Chaim]

(I can't find an edit option....)

Sorry, clicked post too early...


so the filters are applied and cleared correctly, but the checklist status is kept as I left it when filtering...

After clearing the filters I would expect the checklist to return to its initial unfiltered status where all options are selected (to match the content of the grid since it isn't filtered anymore)


Thank you.

[Kostadin]

Hello Oscar,

I prepared a small sample and attached it to this thread. Please give it a try and let me know about the result.

Regards,
Kostadin
Telerik