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LookupGrid: handle empty datasource better

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This commit is contained in:
Jonathan Jenne 2020-05-20 13:36:11 +02:00
parent 7d8300a1db
commit 8e864d5b07
1 changed files with 39 additions and 38 deletions
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77
Controls.LookupGrid/frmLookupGrid.vb
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@ -10,61 +10,62 @@ Public Class frmLookupGrid
Public Property DataSource As DataTable
Public Property SelectedValues As List(Of String)
Private dataColumn As Integer
Private dataSourceTemp As DataTable
Private view As GridView
Private grid As GridControl
Private _DataColumn As Integer
Private _DataSourceTemp As DataTable
Private _View As GridView
Private _Grid As GridControl
Private Sub frmLookupGrid_Load(sender As Object, e As EventArgs) Handles Me.Load
view = viewLookup
grid = gridLookup
If DataSource Is Nothing Then
Exit Sub
End If
_View = viewLookup
_Grid = gridLookup
' Original Datasource soll nicht verändert werden
dataSourceTemp = DataSource.Copy()
If DataSource Is Nothing Then
_DataSourceTemp = New DataTable("TEMP")
_DataSourceTemp.Columns.Add(New DataColumn("VALUE"))
Else
_DataSourceTemp = DataSource.Copy()
End If
If MultiSelect Then
If Not dataSourceTemp.Columns.Contains("SELECTED") Then
If Not _DataSourceTemp.Columns.Contains("SELECTED") Then
Dim selectedColumn = New DataColumn() With {
.ColumnName = "SELECTED",
.DataType = GetType(Boolean),
.DefaultValue = False
}
dataSourceTemp.Columns.Add(selectedColumn)
_DataSourceTemp.Columns.Add(selectedColumn)
selectedColumn.SetOrdinal(0)
End If
End If
' Datasource setzen
grid.DataSource = dataSourceTemp
_Grid.DataSource = _DataSourceTemp
' Anzeige Eigeschaften setzen
view.OptionsFind.Condition = DevExpress.Data.Filtering.FilterCondition.Contains
view.OptionsFind.AlwaysVisible = True
view.OptionsSelection.MultiSelect = False
_View.OptionsFind.Condition = DevExpress.Data.Filtering.FilterCondition.Contains
_View.OptionsFind.AlwaysVisible = True
_View.OptionsSelection.MultiSelect = False
If MultiSelect Then
' Selected Spalte anpassen
Dim checkboxColumn = view.Columns.Item(0)
checkboxColumn.Caption = " "
checkboxColumn.MaxWidth = 10
Dim oCheckboxColumn = _View.Columns.Item(0)
oCheckboxColumn.Caption = " "
oCheckboxColumn.MaxWidth = 10
Text = "Wählen Sie einen oder mehrere Werte:"
dataColumn = 1
_DataColumn = 1
Else
Text = "Wählen Sie einen Wert:"
dataColumn = 0
_DataColumn = 0
End If
If AddNewValues Then
view.OptionsBehavior.AllowAddRows = DevExpress.Utils.DefaultBoolean.True
view.OptionsView.NewItemRowPosition = NewItemRowPosition.Top
_View.OptionsBehavior.AllowAddRows = DevExpress.Utils.DefaultBoolean.True
_View.OptionsView.NewItemRowPosition = NewItemRowPosition.Top
Else
view.OptionsBehavior.AllowAddRows = DevExpress.Utils.DefaultBoolean.False
view.OptionsView.NewItemRowPosition = NewItemRowPosition.None
_View.OptionsBehavior.AllowAddRows = DevExpress.Utils.DefaultBoolean.False
_View.OptionsView.NewItemRowPosition = NewItemRowPosition.None
End If
If SelectedValues Is Nothing Then
@ -72,24 +73,24 @@ Public Class frmLookupGrid
End If
' Bereits ausgewählte Werte im grid auswählen
SyncItemsWithView(view)
SyncItemsWithView(_View)
' Focus auf Find panel setzen
view.ShowFindPanel()
_View.ShowFindPanel()
' Spaltenbreite anpassen
view.BestFitColumns()
_View.BestFitColumns()
End Sub
Private Sub SaveSelectedValues()
' Filter vor dem Auslesen entfernen, damit alle Werte erfasst werden
view.FindFilterText = String.Empty
_View.FindFilterText = String.Empty
If MultiSelect Then
Dim oValues As New List(Of String)
For oIndex = 0 To viewLookup.DataRowCount - 1
Dim oRow As DataRow = view.GetDataRow(oIndex)
Dim oRow As DataRow = _View.GetDataRow(oIndex)
Dim oSelected As Boolean = oRow.Item(0)
Dim oValue As Object = oRow.Item(1)
@ -105,8 +106,8 @@ Public Class frmLookupGrid
SelectedValues = oValues
Else
Dim oRowHandle As Integer = view.GetSelectedRows().ToList().FirstOrDefault()
Dim oRow As DataRow = view.GetDataRow(oRowHandle)
Dim oRowHandle As Integer = _View.GetSelectedRows().ToList().FirstOrDefault()
Dim oRow As DataRow = _View.GetDataRow(oRowHandle)
Dim oValues As New List(Of String)
If oRow IsNot Nothing Then
@ -128,7 +129,7 @@ Public Class frmLookupGrid
If rowView IsNot Nothing Then
Dim row As DataRow = rowView.Row
Dim value = row.Item(dataColumn)
Dim value = row.Item(_DataColumn)
If SelectedValues.Contains(value) Then
If MultiSelect Then
@ -187,8 +188,8 @@ Public Class frmLookupGrid
End Sub
Private Sub viewLookup_ShowingEditor(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles viewLookup.ShowingEditor
Dim rowHandleIsNewItemRow = (view.FocusedRowHandle = GridControl.NewItemRowHandle)
Dim columnIsCheckboxColumn = view.FocusedColumn.FieldName = "SELECTED"
Dim rowHandleIsNewItemRow = (_View.FocusedRowHandle = GridControl.NewItemRowHandle)
Dim columnIsCheckboxColumn = _View.FocusedColumn.FieldName = "SELECTED"
' Prevent editing of Data Column/allow editing for Checkbox Column and NewValue Row
If rowHandleIsNewItemRow Or columnIsCheckboxColumn Then
@ -206,10 +207,10 @@ Public Class frmLookupGrid
' If multiselect is true, check the current row
' If multiselect is false, select the current row and close the window
If MultiSelect = True Then
Dim row As DataRow = view.GetDataRow(e.RowHandle)
Dim row As DataRow = _View.GetDataRow(e.RowHandle)
row.Item(0) = Not CBool(row.Item(0))
Else
Dim row As DataRow = view.GetDataRow(e.RowHandle)
Dim row As DataRow = _View.GetDataRow(e.RowHandle)
Dim value = row.Item(0)
SelectedValues = New List(Of String) From {value}