Question

如何格式化datatable中datacolumn的shortdatestring。数据存在于datatable中，PlannedEndDate应格式化为shortdatestring。

请建议

Private Function ReadSheetToDatatable(ByVal sheetName As String) As DataTable
            Dim dt As DataTable = New DataTable(sheetName)
            dt.Columns.Add(New DataColumn("InquiryNumber", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("Description", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("TagNo", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("TagDescription", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("MileStone", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("SubMilestone", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("ActivityID", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("PlannedStartDate", System.Type.GetType("System.String")))
            dt.Columns.Add(New DataColumn("PlannedEndDate", System.Type.GetType("System.String")))
            'dt.Columns.Add(New DataColumn("PlannedStartDate", System.Type.GetType("System.DateTime")))
            'dt.Columns.Add(New DataColumn("PlannedEndDate", System.Type.GetType("System.DateTime")))

            Using con As OleDb.OleDbConnection = New OleDb.OleDbConnection(GetConnectionString())
                If (Not IsNothing(con)) Then
                    Try
                        'InquiryNumber  Description TagNo   TagDescription  MileStone   SubMilestone    ActivityID  PlannedStartDate PlannedEndDate
                        Dim strSql As String = String.Format("SELECT InquiryNumber, Description, TagNo, TagDescription, MileStone, SubMilestone, ActivityID, PlannedStartDate, PlannedEndDate FROM [{0}]", sheetName)
                        'Dim strSql As String = String.Format("SELECT * FROM [{0}]", sheetName)
                        Dim dataAdapter As New OleDbDataAdapter()
                        dataAdapter.SelectCommand = New OleDbCommand(strSql, con)
                        dataAdapter.Fill(dt)

                        Return dt
                    Catch ex As Exception
                        'PRABHU 25-NOV-2012 used by another process issue fix
                        Petrofac.PTR.Framework.Exceptions.SaveDBExceptionLog(ex.Message, Err.Number, ex.StackTrace.ToString(), "ExcelService", Petrofac.PTR.Framework.SecurityManager.GetBadgeNo())
                        _statusMessage = String.Format("Reading {0} failed ...", sheetName.Replace("$", ""))
                        Return Nothing
                    Finally
                        con.Dispose()
                    End Try
                End If
            End Using
            _statusMessage = String.Format("Reading File failed ...")
            Return Nothing
        End Function

Answer 1

使用像这样的查询

SELECT InquiryNumber, Description, TagNo, TagDescription, MileStone, 
SubMilestone,ActivityID, PlannedStartDate, 
FORMAT(PlannedEndDate ,'dd/MM/yyyy')FROM [{0}]

如何在datatable中的datacolumn中格式化datetimeshortstring格式

1 个答案: