我有一个UltraGrid，其中有很多列，其中2列是DateTime样式。现在，当我使用该列的过滤器时，它将所有DateTime值显示为下拉列表中的文本。但我需要它作为日历，以使过滤器容易。单击过滤器就足以显示日历。
我尝试了一些代码，但它不起作用。
//代码：
Private Sub grdResult_BeforeRowFilterDropDown(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.BeforeRowFilterDropDownEventArgs) Handles grdResult.BeforeRowFilterDropDown
e.Cancel = True
UltraCalendarCombo1.Visible = True
UltraCalendarCombo1.Location = New Point(grdResult.Rows.FilterRow.Cells(e.Column).GetUIElement().Rect.Location.X, grdResult.Rows.FilterRow.Cells(e.Column).GetUIElement().Rect.Location.Y - 2)
UltraCalendarCombo1.Size = New System.Drawing.Size(grdResult.Rows.FilterRow.Cells(e.Column).GetUIElement().Rect.Size.Width, grdResult.Rows.FilterRow.Cells(e.Column).GetUIElement().Rect.Size.Height)
' UltraCalendarCombo1.DroppedDown = True
End Sub
单击过滤器下拉列表时将触发上述事件。
private sub applyCustomeViewSettings(byval gridFormat as GridFormat)
....
...
For Each ColumnFormat In gridFormat.ColumnFormats
For Each column In Me.grdResult.DisplayLayout.Bands(0).Columns
If column.Key.ToUpper = ColumnFormat.ColumnKey.ToUpper Then
If column.Key.ToUpper = "PCSSTDT" Then
column.Header.Caption = IIf(ColumnFormat.Caption = "", ColumnFormat.ColumnKey, ColumnFormat.Caption)
column.Hidden = ColumnFormat.Hidden
'column.AllowRowFiltering = IIf(ColumnFormat.AllowRowFiltering = False, ColumnFormat.AllowRowFiltering, DefaultableBoolean.True) 'CType(ColumnFormat.AllowRowFiltering, DefaultableBoolean)
column.Width = ColumnFormat.Width
column.Header.VisiblePosition = ColumnFormat.VisiblePosition
column.Format = ColumnFormat.Format
column.SortIndicator = ColumnFormat.SortIndicator
' column.Style = ColumnStyle.Date
'column.EditorComponent = UltraCalendarCombo1
column.FilterOperandStyle = FilterOperandStyle.Default
Else
column.Header.Caption = IIf(ColumnFormat.Caption = "", ColumnFormat.ColumnKey, ColumnFormat.Caption)
column.Hidden = ColumnFormat.Hidden
column.AllowRowFiltering = IIf(ColumnFormat.AllowRowFiltering = False, ColumnFormat.AllowRowFiltering, DefaultableBoolean.True) 'CType(ColumnFormat.AllowRowFiltering, DefaultableBoolean)
column.Width = ColumnFormat.Width
column.Header.VisiblePosition = ColumnFormat.VisiblePosition
column.Format = ColumnFormat.Format
column.SortIndicator = ColumnFormat.SortIndicator
column.Style = ColumnFormat.Style
End If
End If
Next
....
...
End Sub
上述方法使网格更改（应用设置）以将过滤器显示为日历。 但这不起作用，并向我显示相同的正常网格。
我怎样才能做到这一点？
答案 0 :(得分：3)
当您按下图标以过滤UltraWinGrid中的DateTime列时，我设法显示MonthCalendar。
当MonthCalendar被调度时，您可以使用此标准WinForm控件提供的熟悉界面选择特定日期。选择日期后，您可以使用该值以编程方式将过滤条件应用于UltraWinGrid列。
要达到此结果，首先需要添加对 Infragistics4.Win.SupportsDialog.v11.2 程序集的引用，您可以在其中找到 UltraGridFilterUIProvider 类
现在，在您需要显示过滤的表单中，添加以下代码:(这只是一个示例，因为我没有您的数据源，因此我有一个只有一个日期时间列的预构建的）
Imports Infragistics.Win.UltraWinGrid
Imports Infragistics.Win.SupportDialogs.FilterUIProvider
Public Class Form1
' This is the key object that let us customize '
' the Filter for the UltraWinGrid'
Dim _filterUIProvider as UltraGridFilterUIProvider
' In the InitializeLayout event we substitute the normal
' filter handler with the custom filter'
Private Sub UltraGrid1_InitializeLayout(sender As Object, e As Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs) Handles UltraGrid1.InitializeLayout
e.Layout.Override.AllowRowFiltering = Infragistics.Win.DefaultableBoolean.True
_filterUIProvider = New UltraGridFilterUIProvider()
' Comment out the following line to test the default
' **Excel Filter Style Interface** '
AddHandler _filterUIProvider.BeforeMenuPopulate, AddressOf _filterUIProvider_BeforeMenuPopulate
e.Layout.Override.FilterUIProvider = _filterUIProvider
End Sub
' Before the UltraGridFilterUIProvider shows its standard form interface
' we start a custom form used to apply our filtering logic '
' and block the display of the UltraGridFilterUIProvider interface '
Private Sub _filterUIProvider_BeforeMenuPopulate(sender As Object, e As Infragistics.Win.SupportDialogs.FilterUIProvider.BeforeMenuPopulateEventArgs)
' A custom form with the MonthCalendar and 3 buttons '
' to handle the filter logic '
Using fDate = new FormDate()
' Open our custom form with the monthcalendar
if (DialogResult.OK = fDate.ShowDialog())
' We need a nullable date to allow the removing of the filter'
Dim dtFilter As DateTime? = fDate.SelectedDate
if (dtFilter.HasValue)
' Apply programmatically a filtercondition to the column
' In this case I have only one column. so I use the index 0
' in your case this should change to reflect your column index
Dim fc = new FilterCondition(FilterComparisionOperator.Equals, dtFilter.Value)
ultraGrid1.DisplayLayout.Bands(0).ColumnFilters(0).FilterConditions.Add(fc)
Else
ultraGrid1.DisplayLayout.Bands(0).ColumnFilters.ClearAllFilters()
End If
End If
End Using
e.Handled = true ' Stop the standard interface'
End Sub
End Class
现在我们只需要一个名为 FormDate 的简单表单，其中包含MonthCalendar和三个按钮（Set，Clear，Cancel），它们返回（Set）一个Date来设置过滤器，（Clear）一个null删除先前过滤器的值和取消按钮以中止处理
这里是表单的代码，设计很简单
Public Class FormDate
Public Property SelectedDate As DateTime?
Private Sub FormDate_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.SelectedDate = Nothing
End Sub
Private Sub cmdSet_Click(sender As Object, e As EventArgs) Handles cmdSet.Click
'This button has DialogResult=OK'
Me.SelectedDate = monthCalendar1.SelectionStart
End Sub
Private Sub cmdClear_Click(sender As Object, e As EventArgs) Handles cmdClear.Click
'This button has DialogResult=OK'
Me.SelectedDate = Nothing
End Sub
End Class
这可以解决您的问题，但是，我发现了UltraGridFilterUIProvider中似乎存在的错误。当我调用 e.Handled = True 时，我的预期结果是过滤器没有显示任何内容，而是仍然出现一个小窗口，我必须按Escape才能隐藏它。我没有找到任何方法来自动隐藏它 向Infragistics团队发出信号似乎是一个问题。
我建议您也测试UltraGridFilterUIProvider自动提供的 Excel样式过滤器接口。此界面有很多选项，比标准UI过滤器更受欢迎。要测试此接口，您应该只注释掉上面的AddHandler行
编辑在@Alhalama的评论之后，我尝试使用BeforeRowFilterDropDown事件，结果更好（现在它很完美）。所以我用AddHandler注释掉了这行，删除了BeforeMenuPopulate的代码并添加了BeforeRowFilterDropDown的代码
Private Sub UltraGrid1_BeforeRowFilterDropDown(sender As Object, e As BeforeRowFilterDropDownEventArgs) Handles UltraGrid1.BeforeRowFilterDropDown
If e.Column.Key = "DateRequest" Then
Using fDate = New FormDate()
If DialogResult.OK = fDate.ShowDialog() Then
Dim dtFilter As DateTime? = fDate.SelectedDate
If (dtFilter.HasValue) Then
Dim fc As FilterCondition = New FilterCondition(FilterComparisionOperator.Equals, dtFilter.Value)
UltraGrid1.DisplayLayout.Bands(0).ColumnFilters(0).FilterConditions.Add(fc)
Else
UltraGrid1.DisplayLayout.Bands(0).ColumnFilters.ClearAllFilters()
End If
End If
End Using
e.Cancel = True
End If
End Sub
现在，当我尝试打开名为 DateRequest 的列的过滤器时，我立即打开FormDate，最后我将BeforeRowFilterDropDownEventArgs的Cancel属性设置为true，以避免进一步处理过滤器对话。这似乎是完美的......对Alhalama先生来说，这是非常有用的。如果你希望我认为你应该发布你自己的答案，因为你的建议真的有所作为。