DropDownBlanksFilterItem Class

Represents a "Blanks" filter item in the HeaderDropDownList.

Object Model

Syntax

Visual Basic (Declaration)
Visual Basic (Usage)
C#

<ToolboxBitmapAttribute()>
Public Class DropDownBlanksFilterItem 
   Inherits DropDownItem
   Implements INamedObject

Dim instance As DropDownBlanksFilterItem

[ToolboxBitmap()]
public class DropDownBlanksFilterItem : DropDownItem, INamedObject

Remarks

The filtering operation is applied to the GcMultiRow control when clicked and all rows whose cell values are empty are shown.

The filtered cells are specified by HeaderDropDownList.CellIndex or HeaderDropDownList.CellName, and between HeaderDropDownList.StartRow and HeaderDropDownList.EndRow.

Example

The following code example shows how to use this drop-down item to sort or filter. This code example is part of a larger example provided for the ColumnHeaderCell.DropDownList property.

void setSecondColumnDropDownListButton_Click(object sender, EventArgs e)
        {
            // Create a header drop down list without default down down items.
            HeaderDropDownList headerDropDownList = new HeaderDropDownList();

            // If you do not indicate which cell to filter, the cell with the same index as the column header cell in the row       
      // section is filtered.
            headerDropDownList.CellName = "textBoxCell2";

            DropDownItemCollection dropDownItemCollection = headerDropDownList.Items;
            // Initialize drop down items manually.
            // Add sort item.
            dropDownItemCollection.Add(new DropDownSortItem(SortOrder.Ascending));
            dropDownItemCollection.Add(new DropDownSortItem(SortOrder.Descending));
            
            // Add a separator line.
            dropDownItemCollection.Add(new DropDownSeparatorItem());

            // Add show all, black and none black items.
            dropDownItemCollection.Add(new DropDownShowAllFilterItem());
            dropDownItemCollection.Add(new DropDownBlanksFilterItem());
            dropDownItemCollection.Add(new DropDownNonBlanksFilterItem());

            // Add auto filter items.
            dropDownItemCollection.Add(new DropDownAutoFilterItem());

            // Get second column header cell.
            ColumnHeaderCell columnHeaderCell = this.gcMultiRow1.ColumnHeaders[0][1] as ColumnHeaderCell;
            columnHeaderCell.DropDownList = headerDropDownList;
        }

VB.NET

Private Sub setSecondColumnDropDownListButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles 
setSecondColumnDropDownListButton.Click
        ' Create a header drop down list without default down down items.
        Dim headerDropDownList As New HeaderDropDownList()

        ' If you do not indicate which cell to filter, the cell with the same index as the column header cell in the row section 
        ' is filtered.
        headerDropDownList.CellName = "textBoxCell2"

        Dim dropDownItemCollection As DropDownItemCollection = headerDropDownList.Items
        ' Initialize drop down items manually.
        ' Add sort item.
        dropDownItemCollection.Add(New DropDownSortItem(SortOrder.Ascending))
        dropDownItemCollection.Add(New DropDownSortItem(SortOrder.Descending))

        ' Add a separator line.
        dropDownItemCollection.Add(New DropDownSeparatorItem())

        ' Add show all, black and none black items.
        dropDownItemCollection.Add(New DropDownShowAllFilterItem())
        dropDownItemCollection.Add(New DropDownBlanksFilterItem())
        dropDownItemCollection.Add(New DropDownNonBlanksFilterItem())

        ' Add auto filter items.
        dropDownItemCollection.Add(New DropDownAutoFilterItem())

        ' Get second column header cell.
        Dim columnHeaderCell As ColumnHeaderCell = TryCast(Me.gcMultiRow1.ColumnHeaders(0)(1), 
ColumnHeaderCell)
        columnHeaderCell.DropDownList = headerDropDownList
    End Sub

Inheritance Hierarchy

System.Object
GrapeCity.Win.MultiRow.DropDownItem
GrapeCity.Win.MultiRow.DropDownBlanksFilterItem

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DropDownBlanksFilterItem Members
GrapeCity.Win.MultiRow Namespace
HeaderDropDownList Class
DropDownItemCollection Class
DropDownItem Class
DropDownShowAllFilterItem Class
DropDownNonBlanksFilterItem Class
DropDownAutoFilterItem Class
DropDownCustomFilterItem Class
DropDownList Property