By design, GridViewDataComboBoxColumn does not render (Blank) and (NonBlank) items if the HeaderFilterMode property is set to CheckedList. However, you can add these items in the HeaderFilterFillItems event handler. Just call the FilterValue.CreateShowBlanksValue and FilterValue.CreateShowNonBlanksValue methods. <dx:ASPxGridView ID=”grid” runat=”server” AutoGenerateColumns=”False” DataSourceID=”dsCategories” KeyFieldName=”CategoryID” OnHeaderFilterFillItems=”grid_HeaderFilterFillItems”> <Columns> <dx:GridViewDataTextColumn FieldName=”CategoryID”> </dx:GridViewDataTextColumn> <dx:GridViewDataTextColumn FieldName=”Description”> </dx:GridViewDataTextColumn> <dx:GridViewDataComboBoxColumn FieldName=”CategoryNameNull” Caption=”Category Name”> <Settings HeaderFilterMode=”CheckedList” /> <PropertiesComboBox DataSourceID=”dsCategories” ValueField=”CategoryNameNull” TextField=”CategoryNameNull” /> </dx:GridViewDataComboBoxColumn> </Columns> […]
Tag: header
Display HTPP Headers in C# & ASP.net
using System; using System.Web.UI; using System.Collections.Specialized; public partial class _Default : Page { protected void Page_Load(object sender, EventArgs e) { NameValueCollection headers = base.Request.Headers; for (int i = 0; i < headers.Count; i++) { string key = headers.GetKey(i); string value = headers.Get(i); base.Response.Write(key + ” = ” + value + “<br/>”); } } }