在数据表中添加行时出现问题 [英] Problem in adding rows in a datatable

问题描述

你好!!!

我有两个字段from_year = 2010和curr_year = 2013.我需要从2010年到2013年的每半年将数据添加到数据表中.我尝试过此操作

Hello!!!

I have two fields from_year =2010 and curr_year =2013. I need to add data in datatable for each half year from 2010 to 2013. I Tried this

On Error Resume Next
Dim countLoop As Int16 = 0
     Dim count As Int16 = 0
     For i As Int16 = from_year To curr_year
         count = 0
         countLoop = 0
         While countLoop < 2
             If count = 0 Then
                 Dim dr As DataRow = dt_Main1.NewRow()
                 dr("SemesterFrom") = "01-Jan-" + i.ToString()
                 dr("SemesterTo") = "30-Jun-" + i.ToString()
                 dr("LeavesForSemester") = 15
                 dt_Main1.Rows.Add(dr)
             Else
                 Dim dr As DataRow = ds.Tables("Months").NewRow()
                 dr("SemesterFrom") = "01-Jul-" + i.ToString()
                 dr("SemesterTo") = "31-Dec-" + from_year.ToString()
                 dr("LeavesForSemester") = 16
                 dt_Main1.Rows.Add(dr)
             End If
             count += 1
             countLoop += 1
         End While

     Next

它的作用是仅添加一部分而不添加其他部分的数据.
可能是因为已经为for循环的该部分添加了行dr.请告诉我如何改进此代码以添加一半的数据，即每年两次，从1月1日到6月30日，从7月1日到12月31日.

what it''s doing is it adds data for only if part not else part.
May be because the row dr is already added for that part of the for loop. Please tell me how can i improve this code to add data for half half i.e two times a year from 1-jan to 30 -Jun and from 1 July to 31 Dec.

推荐答案

您好，Ujjwal，

我看到两个新的行语句彼此不同

Hi Ujjwal,

As I see two new row statements different from Each other

Dim dr As DataRow = dt_Main1.NewRow()

Dim dr As DataRow = ds.Tables("Months").NewRow()

因此，我认为两个DataTable的结构不匹配，您尝试在

So as I think two DataTable''s struct mismatch and you try to add new rows at

dt_Main1

处添加新行，因为这会在其他部分抛出错误
但您提到

there for its throw an error on else part
but you mentioned

On Error Resume Next

继续执行.

结果，它仅执行If部分，而不执行else部分.

there for it continue execution.

As a result it only perform If part and not the else part.

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