How to compare date columns using expression in WinForms GridControl?
Compare the date columns using expressions
To compare the date columns using expressions, can be handled by SelectedIndexChanged event.
1.
FilterCompareOperator helps
to give the comparer condition to filter the records.
2. RecordFilterDescriptor provides the filter criteria by displaying only a subset of records from the underlying data source.
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
this.gridGroupingControl1.TableDescriptor.RecordFilters.Clear();
string s = "";
switch (comboBox1.SelectedIndex)
{
case 0: //dates >= April 17, 2008
s = string.Format("[{0}]GreaterThanOrEqualTo {{{1}}}", "date", "4/17/2008");
FilterCondition con = new FilterCondition(FilterCompareOperator.GreaterThanOrEqualTo, "4/17/2008");
RecordFilterDescriptor rec = new RecordFilterDescriptor("date", con);
this.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec);
break;
case 1: //dates < April 16, 2008
s = string.Format("[{0}] LessThan {{{1}}}", "date", "4/16/2008");
FilterCondition con1 = new FilterCondition(FilterCompareOperator.LessThan, "4/16/2008");
RecordFilterDescriptor rec1 = new RecordFilterDescriptor("date", con1);
this.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec1);
break;
case 2: //dates < April 19, 2008
s = string.Format("[{0}] GreaterThan {{{1}}}", "date", "4/19/2008"); //first arg empty means DateTime.MinValue
FilterCondition con2 = new FilterCondition(FilterCompareOperator.GreaterThan, "4/19/2008");
RecordFilterDescriptor rec2 = new RecordFilterDescriptor("date", con2);
this.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec2);
break;
default:
break;
}
this.label2.Text = s;//so you can see the actual filter
}Private Sub comboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles comboBox1.SelectedIndexChanged
Me.gridGroupingControl1.TableDescriptor.RecordFilters.Clear()
Dim s As String = ""
Select Case comboBox1.SelectedIndex
Case 0 'dates >= April 17, 2008
s = String.Format("[{0}]GreaterThanOrEqualTo {{{1}}}", "date", "4/17/2008")
Dim con As New FilterCondition(FilterCompareOperator.GreaterThanOrEqualTo, "4/17/2008")
Dim rec As New RecordFilterDescriptor("date", con)
Me.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec)
Case 1 'dates < April 16, 2008
s = String.Format("[{0}] LessThan {{{1}}}", "date", "4/16/2008")
Dim con1 As New FilterCondition(FilterCompareOperator.LessThan, "4/16/2008")
Dim rec1 As New RecordFilterDescriptor("date", con1)
Me.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec1)
Case 2 'dates < April 19, 2008
s = String.Format("[{0}] GreaterThan {{{1}}}", "date", "4/19/2008") 'first arg empty means DateTime.MinValue
Dim con2 As New FilterCondition(FilterCompareOperator.GreaterThan, "4/19/2008")
Dim rec2 As New RecordFilterDescriptor("date", con2)
Me.gridGroupingControl1.TableDescriptor.RecordFilters.Add(rec2)
Case Else
End Select
Me.label2.Text = s 'so you can see the actual filter
End SubThe screenshots below show the comparison of the date column using expressions.
