Question

我们网格中的一列，“EstimateDate”在未估算作业时为空。

因此，要计算网格中估计作业数量的摘要中的计数，有必要计算“EstimateDate”不为空的行数。

我相信我需要处理CustomSummaryCalculate，但如何检查该特定列是否为空？

Fwiw，这不是我需要做的唯一一个列，它也不是网格的KeyField。我已经检查了这个不适用的解决方案。（http://www.devexpress.com/Support/Center/Question/Details/Q507778）

谢谢！

Answer 1

以下是我最终解决问题的方法：

Dim leadcount，estimatecount，bookedcount，completedcount As Integer

受保护的子ASPxGridView1_CustomSummaryCalculate（ByVal sender As Object，ByVal e As DevExpress.Data.CustomSummaryEventArgs）处理ASPxGridView1.CustomSummaryCalculate

    Try
        'Summary items are defined by the tag set in the summary item in the summary section of the aspx page
        Dim SummaryItem As String = (TryCast(e.Item, ASPxSummaryItem)).Tag

        Select Case SummaryItem

            Case "LeadDate"
                Cust_Calc_Count_Not_Empty(sender, e, leadcount)
            Case "EstimateDate"
                Cust_Calc_Count_Not_Empty(sender, e, estimatecount)
            Case "BookDate"
                Cust_Calc_Count_Not_Empty(sender, e, bookedcount)
            Case "CompletedDate"
                Cust_Calc_Count_Not_Empty(sender, e, completedcount)

        End Select

    Catch ex As Exception

    End Try

End Sub






Sub Cust_Calc_Count_Not_Empty(ByVal sender As Object, e As DevExpress.Data.CustomSummaryEventArgs, ByRef counter As Integer)

    Try
        Dim item As ASPxSummaryItem = TryCast(e.Item, ASPxSummaryItem)

        ' Initialize summary
        If e.SummaryProcess = DevExpress.Data.CustomSummaryProcess.Start Then
            counter = 0
        End If

        ' Perform calculations
        If e.SummaryProcess = DevExpress.Data.CustomSummaryProcess.Calculate Then
            If (e.FieldValue.ToString <> "") Then
                counter = counter + 1
            End If
        End If

        ' Save results
        If e.SummaryProcess = DevExpress.Data.CustomSummaryProcess.Finalize Then
            e.TotalValue = String.Format("{0}", counter)
        End If

    Catch ex As Exception

    End Try

End Sub

在DevExpress AspxGridView Summary中计算非空行

1 个答案: