ASPxGridHeaderFilterEventArgs.AddShowAll() Method
Adds the ‘All’ item to the header filter.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v19.1.dll
Declaration
Example
The code sample below demonstrates how to provide custom header filter items using the ASPxVerticalGrid.BeforeHeaderFilterFillItems event. The ASPxGridBeforeHeaderFilterFillItemsEventArgs.AddValue method is used to create filter items. The ASPxGridBeforeHeaderFilterFillItemsEventArgs.Handled property is set to true to prevent the ASPxVerticalGrid.HeaderFilterFillItems event from being raised.
Note that the event fires before default items are created. If you would like to add custom items to default items, use the ASPxVerticalGrid.HeaderFilterFillItems event.
The image below shows the result.
protected void ASPxVerticalGrid1_BeforeHeaderFilterFillItems(object sender, DevExpress.Web.ASPxVerticalGridBeforeHeaderFilterFillItemsEventArgs e)
{
if (e.Row.FieldName == "UnitPrice")
{
e.AddShowAll();
int step = 20;
var prop = new OperandProperty(e.Row.FieldName);
for (int i = 0; i < 5; i++)
{
var start = step * i;
var end = start + step;
e.AddValue(string.Format("from {0:c0} to {1:c0}", start, end), prop >= start & prop < end);
}
e.AddValue(string.Format(">= {0:c0}", 100), prop >= 100);
e.Handled = true;
}
}
See Also