问题描述
我正在编写程序,其中:在datagridview中选择了几行后,它会检查是否选择了1个或更多行.如果是一份,则在一页上打印两份报告(一份=半页).如果更多:每页打印两份报告,打印所需的页数.问题是,我的代码打印了相同报告的4531456453页(第一行和第二行):/
I'm making program, which: After you select few rows in datagridview it checks if 1 or more was selected. If one, print two copies of report on one page(One report = half page) If more: Print two reports per page, printing as much as needed pages. Problem is, my code prints 4531456453 pages of same report(first and second row) :/
基本代码示例:
yPos = 0
Do While tmpI < mydatagridview.SelectedRows.Count - 1
For Each selectedrow As DataGridViewRow In mydatagridview.SelectedRows
Dim data as string = mydatagridview.SelectedRows(selectedrow.index).cells(1).value
Dim data2 as string = mydatagridview.SelectedRows(selectedrow.index).cells(12).value
e.graphics.drawstring(data, drawfont, (e.graphics.pagebound.width/2-e.graphics.measurestring(data, drawfont).width/2), 25+yPos)
e.graphics.drawstring(data2, drawfont, (e.graphics.pagebound.width/2-e.graphics.measurestring(data2, drawfont).width/2), 50+yPos)
yPos += e.pagebounds.height/2
tmpI += 1
If yPos > e.pagebound.height/2 Then
h = 0
e.HasMorePages = true
Exit Sub
End If
Next selecedrow
Loop
截至目前,就像我之前说过的那样,它从带有索引0和1的SelectedRows中打印出无限量的包含数据和data2的页面.
As of right now, as I said before it prints infinite amount of pages having data and data2 from SelectedRows with indexes 0 and 1.
推荐答案
希望这会帮助......
Hope this helps ...............
Sub PrintIt(ByVal e As System.Drawing.Printing.PrintPageEventArgs, byval nRow as Integer,ByVal nY As Integer)
Dim data as string = mydatagridview.SelectedRows(nRow).cells(1).value
Dim data2 as string = mydatagridview.SelectedRows(nRow).cells(12).value
e.graphics.drawstring(data, drawfont, (e.graphics.pagebound.width/2-e.graphics.measurestring(data, drawfont).width/2), 25+nY)
e.graphics.drawstring(data2, drawfont, (e.graphics.pagebound.width/2-e.graphics.measurestring(data2, drawfont).width/2), 50+nY)
End Sub
在您的代码中还有一些修饰符..
And some modif in your code ..
yPos = 0
If mydatagridview.SelectedRows.Count = 1
PrintIt(e,0,yPos)
yPos += e.pagebounds.height/2
PrintIt(e,0,yPos)
Elseif mydatagridview.SelectedRows.Count > 1
Dim x,n As Integer
For x = 0 to mydatagridview.SelectedRows.Count-1
If n = 2 Then
e.HasMorePages = true
n = 0
yPos = 0
End If
PrintIt(e,x,yPos)
yPos += e.pagebounds.height/2
n += 1
Next
End If
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