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----  [求助]又是0值问题  (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=158577)
--  作者：hanlingli111999
--  发布时间：2020/11/25 9:20:00
--  [求助]又是0值问题
老师好，我的专业报表，出现0值情况，在您指导下，问题解决，所用代码为
For r As Integer = 0 To tb.Rows.Count - 1
       If tb.Rows(r).isnull(ColNames(c)) = False
        rt.Cells(r + 1, c).Text = tb.Rows(r)(ColNames(c))
End If
我现在把合并单元格代码融合进来后，又出现了0值，上述代码还在，不知为什么
代码如下：




Syscmd.Column.UnHide()
Dim doc As New PrintDoc \'定义一个新报表
Dim rt As New prt.RenderTable \'定义一个新表格
Dim tb As Table = CurrentTable
Dim ColNames As New List(Of String)
 
For Each cl As Col In tb.Cols \'排除隐藏列
  
    If cl.Visible Then
        ColNames.Add(cl.Name)
    End If
Next

Dim rx As New prt.RenderText
    rx.Text = ApplicationTitle.split(".")(0)
    rx.Style.Font = New Font("宋体", 16, FontStyle.Bold) 
    rx.Style.TextAlignHorz = prt.AlignHorzEnum.Center
    rx.Style.Spacing.Bottom = 3
    Doc.body.Children.Add(rx)
rt.SplitHorzBehavior = prt.SplitBehaviorEnum.SplitIfNeeded \'表格宽度超出页宽时,可以水平换页
rt.Style.Font = tb.Font
 Dim MergeCols As Integer = 1 \'指定要合并的列数
tb.Sort = "计算部位" \'根据合并列排序

rt.SplitHorzBehavior = prt.SplitBehaviorEnum.SplitIfNeeded 
rt.Style.Font = tb.Font
rt.Style.TextAlignVert = prt.AlignVertEnum.Center
rt.RepeatGridLinesVert = True \'换页后重复表格线


For c As Integer = 0 To ColNames.Count - 1 
    Dim lr As Integer \' 用于保存合并区域的起始行
    rt.Cells(0,c).Text = ColNames(c)
    rt.Cells(0,c).Style.TextAlignHorz = prt.AlignHorzEnum.Center
    rt.Cols(c).Width = tb.Cols(ColNames(c)).PrintWidth
    If tb.Cols(ColNames(c)).IsNumeric OrElse tb.Cols(ColNames(c)).IsDate Then
        rt.Cols(c).Style.TextAlignHorz = prt.AlignHorzEnum.Right
    End If
    For r As Integer = 0 To tb.Rows.Count - 1
       If tb.Rows(r).isnull(ColNames(c)) = False
        rt.Cells(r + 1, c).Text = tb.Rows(r)(ColNames(c))
End If

        If c <= MergeCols - 1 Then \'如果是要合并的列
            Dim Merge As Boolean = True
            If r = 0 Then
                Merge = False
            Else
                For n As Integer = 0 To c
                    If tb.Rows(r)(ColNames(n)) <> tb.Rows(r - 1)(ColNames(n))
                        Merge = False
                        Exit For
                    End If
                             Next
            End If
            If Merge Then
                rt.Cells(lr,c).SpanRows = rt.Cells(lr,c).SpanRows + 1
            Else
                rt.Cells(r + 1, c).Text = tb.Rows(r)(ColNames(c))
                rt.Cells(r + 1, c).VertSplitBehavior = prt.CellSplitBehaviorEnum.Copy \'换页后重复单元格
                lr = r + 1
            End If
        Else
            rt.Cells(r + 1, c).Text = tb.Rows(r)(ColNames(c))
        End If


     Next
Next


For c As Integer = 0 To ColNames.Count - 1 \'逐列设置和填入内容
    rt.Cells(0,c).Text = ColNames(c) \'列名作为标题
    rt.Cells(0,c).Style.TextAlignHorz = prt.AlignHorzEnum.Center \'标题内容水平居中
    rt.Cols(c).Width = tb.Cols(ColNames(c)).PrintWidth \'列宽等于实际列宽
    If tb.Cols(ColNames(c)).IsNumeric OrElse tb.Cols(ColNames(c)).IsDate Then \'如果是数值或日期列
        rt.Cols(c).Style.TextAlignHorz = prt.AlignHorzEnum.Center \'数据水平靠右
    End If

      For r As Integer = 0 To tb.Rows.Count - 1 \'开始填入该列内容

If tb.Rows(r).isnull(ColNames(c)) = False
        rt.Cells(r + 1, c).Text = tb.Rows(r)(ColNames(c))
End If
    

     If ColNames(c) = "重量t" OrElse ColNames(c) = "油漆面积㎡" 
rt.Cells(r + 1, c).Text = format(tb.Rows(r)(ColNames(c)),"0.000")
End If

    Next

Next


rt.Cols.Insert(0) \'在左边插入一列,用于打印行号
rt.Cols(0).Width = 10 \'设置行号列的宽度
For i As Integer = 1 To rt.Rows.Count - 1
    rt.Cells(i,0).text = i \'逐行写入行号
    rt.Cols(0).Style.TextAlignHorz = prt.AlignHorzEnum.Center 
Next 
rt.Style.GridLines.Horz = new Prt.LineDef(Color.Gray) \'这个设置的是所有的水平网格线
rt.Style.GridLines.Vert = new Prt.LineDef(Color.Gray) \'这个设置的是所有的垂直网格线
rt.Style.GridLines.Left= New Prt.LineDef(0.5, Color.Black)
rt.Style.GridLines.Right = New Prt.LineDef(0.5, Color.Black)

rt.y = "Prev.Bottom + 3" \'设置垂直位置

rt.CellStyle.Spacing.All = 1 \'单元格内距设为0.5毫米
rt.Rows(0).Style.TextAlignHorz = prt.AlignHorzEnum.Center \'第一行内容水平居中
rt.Rows(0).Style.GridLines.top = New Prt.LineDef(0.5, Color.Black)
rt.RowGroups(0,1).Header = prt.TableHeaderEnum.All \'利用行组,将第一行设为表头.
doc.Body.Children.Add(rt) \'将表格加入到报表
doc.PageSetting.Landscape = False \'横向打印
Doc.PageSetting.TopMargin = 20 \'设置上边距
Doc.PageSetting.BottomMargin = 20 \'设置下边距
rt.Rows(rt.Rows.Count).Height = 0.01
Dim cnt As Integer = rt.Rows.Count-1
\'rt.Rows(rt.Rows.Count-1).Style.BackColor = Color.white
\'rt.Rows(cnt).Style.GridLines.Top = New Prt.LineDef(Color.white)
For i As Integer = 0 To rt.Cols.Count - 1
    If i = 0
        rt.Cells(cnt,i).Style.GridLines.left= New Prt.LineDef(0.5,Color.Black)
    Else
        rt.Cells(cnt,i).Style.GridLines.left= New Prt.LineDef(Color.Gray)
    End If
    If i = rt.Cols.Count - 1
        rt.Cells(cnt,i).Style.GridLines.right= New Prt.LineDef(0.5,Color.Black)
    End If
    rt.Cells(cnt,i).Style.GridLines.Top= New Prt.LineDef(Color.white)
    rt.Cells(cnt,i).Style.GridLines.Bottom = New Prt.LineDef(0.5,Color.Black)
Next
rt.RowGroups(rt.Rows.Count-1,1).Footer  = prt.TableHeaderEnum.All
rt.Rows(cnt).Style.GridLines.Bottom = New Prt.LineDef(Color.Black)


Dim my As New prt.RenderTable
my.Cells(0,0).Text = Date.Today
my.Cells(0,1).Text =  ApplicationTitle.split(".")(0)
my.Cells(0,2).Text = "第[PageNo]页,共[PageCount]页" 
my.Cols(0).Style.TextAlignHorz = prt.AlignHorzEnum.Left
my.Cols(1).Style.TextAlignHorz = prt.AlignHorzEnum.Center

my.Cols(2).Style.TextAlignHorz = prt.AlignHorzEnum.Right

my.Style.FontSize = 8 \'字体大小为8磅

Doc.PageFooter = my \'作为页眉使用
doc.Preview()
--  作者：有点蓝
--  发布时间：2020/11/25 9:35:00
--  
自己检查代码里有什么地方给报表单元格赋值的，全部加上判断
--  作者：hanlingli111999
--  发布时间：2020/11/25 11:15:00
--  
问题解决