【发布时间】：2014-12-10 04:21:08
【问题描述】：
您好，我正在使用以下代码打印 datagridview。它可以工作，但它会打印每一列，甚至是那些在表单上不可见的列。有没有办法让它只打印可见的列。谢谢。
Private Structure pageDetails
Dim columns As Integer
Dim rows As Integer
Dim startCol As Integer
Dim startRow As Integer
End Structure
Private pages As Dictionary(Of Integer, pageDetails)
Dim maxPagesWide As Integer
Dim maxPagesTall As Integer
Private Sub PrintDocument1_BeginPrint(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintEventArgs) Handles PrintDocument1.BeginPrint
''this removes the printed page margins
PrintDocument1.OriginAtMargins = True
PrintDocument1.DefaultPageSettings.Margins = New Drawing.Printing.Margins(0, 0, 0, 0)
pages = New Dictionary(Of Integer, pageDetails)
Dim maxWidth As Integer = CInt(PrintDocument1.DefaultPageSettings.PrintableArea.Width) - 40
Dim maxHeight As Integer = CInt(PrintDocument1.DefaultPageSettings.PrintableArea.Height) - 40 + Label1.Height
Dim pageCounter As Integer = 0
pages.Add(pageCounter, New pageDetails)
Dim columnCounter As Integer = 0
Dim columnSum As Integer = DataGridView1.RowHeadersWidth
For c As Integer = 0 To DataGridView1.Columns.Count - 1
If columnSum + DataGridView1.Columns(c).Width < maxWidth Then
columnSum += DataGridView1.Columns(c).Width
columnCounter += 1
Else
pages(pageCounter) = New pageDetails With {.columns = columnCounter, .rows = 0, .startCol = pages(pageCounter).startCol}
columnSum = DataGridView1.RowHeadersWidth + DataGridView1.Columns(c).Width
columnCounter = 1
pageCounter += 1
pages.Add(pageCounter, New pageDetails With {.startCol = c})
End If
If c = DataGridView1.Columns.Count - 1 Then
If pages(pageCounter).columns = 0 Then
pages(pageCounter) = New pageDetails With {.columns = columnCounter, .rows = 0, .startCol = pages(pageCounter).startCol}
End If
End If
Next
maxPagesWide = pages.Keys.Max + 1
pageCounter = 0
Dim rowCounter As Integer = 0
Dim rowSum As Integer = DataGridView1.ColumnHeadersHeight
For r As Integer = 0 To DataGridView1.Rows.Count - 2
If rowSum + DataGridView1.Rows(r).Height < maxHeight Then
rowSum += DataGridView1.Rows(r).Height
rowCounter += 1
Else
pages(pageCounter) = New pageDetails With {.columns = pages(pageCounter).columns, .rows = rowCounter, .startCol = pages(pageCounter).startCol, .startRow = pages(pageCounter).startRow}
For x As Integer = 1 To maxPagesWide - 1
pages(pageCounter + x) = New pageDetails With {.columns = pages(pageCounter + x).columns, .rows = rowCounter, .startCol = pages(pageCounter + x).startCol, .startRow = pages(pageCounter).startRow}
Next
pageCounter += maxPagesWide
For x As Integer = 0 To maxPagesWide - 1
pages.Add(pageCounter + x, New pageDetails With {.columns = pages(x).columns, .rows = 0, .startCol = pages(x).startCol, .startRow = r})
Next
rowSum = DataGridView1.ColumnHeadersHeight + DataGridView1.Rows(r).Height
rowCounter = 1
End If
If r = DataGridView1.Rows.Count - 2 Then
For x As Integer = 0 To maxPagesWide - 1
If pages(pageCounter + x).rows = 0 Then
pages(pageCounter + x) = New pageDetails With {.columns = pages(pageCounter + x).columns, .rows = rowCounter, .startCol = pages(pageCounter + x).startCol, .startRow = pages(pageCounter + x).startRow}
End If
Next
End If
Next
maxPagesTall = pages.Count \ maxPagesWide
End Sub
Private Sub PrintDocument1_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
Dim rect As New Rectangle(20, 20, CInt(PrintDocument1.DefaultPageSettings.PrintableArea.Width), Label1.Height)
Dim sf As New StringFormat
sf.Alignment = StringAlignment.Center
sf.LineAlignment = StringAlignment.Center
e.Graphics.DrawString(Label1.Text, Label1.Font, Brushes.Black, rect, sf)
sf.Alignment = StringAlignment.Near
Dim startX As Integer = 50
Dim startY As Integer = rect.Bottom
Static startPage As Integer = 0
For p As Integer = startPage To pages.Count - 1
Dim cell As New Rectangle(startX, startY, DataGridView1.RowHeadersWidth, DataGridView1.ColumnHeadersHeight)
e.Graphics.FillRectangle(New SolidBrush(SystemColors.ControlLight), cell)
e.Graphics.DrawRectangle(Pens.Black, cell)
startY += DataGridView1.ColumnHeadersHeight
For r As Integer = pages(p).startRow To pages(p).startRow + pages(p).rows - 1
cell = New Rectangle(startX, startY, DataGridView1.RowHeadersWidth, DataGridView1.Rows(r).Height)
e.Graphics.FillRectangle(New SolidBrush(SystemColors.ControlLight), cell)
e.Graphics.DrawRectangle(Pens.Black, cell)
e.Graphics.DrawString(DataGridView1.Rows(r).HeaderCell.Value, DataGridView1.Font, Brushes.Black, cell, sf)
startY += DataGridView1.Rows(r).Height
Next
startX += cell.Width
startY = rect.Bottom
For c As Integer = pages(p).startCol To pages(p).startCol + pages(p).columns - 1
cell = New Rectangle(startX, startY, DataGridView1.Columns(c).Width, DataGridView1.ColumnHeadersHeight)
e.Graphics.FillRectangle(New SolidBrush(SystemColors.ControlLight), cell)
e.Graphics.DrawRectangle(Pens.Black, cell)
e.Graphics.DrawString(DataGridView1.Columns(c).HeaderCell.Value, DataGridView1.Font, Brushes.Black, cell, sf)
startX += DataGridView1.Columns(c).Width
Next
startY = rect.Bottom + DataGridView1.ColumnHeadersHeight
For r As Integer = pages(p).startRow To pages(p).startRow + pages(p).rows - 1
startX = 50 + DataGridView1.RowHeadersWidth
For c As Integer = pages(p).startCol To pages(p).startCol + pages(p).columns - 1
cell = New Rectangle(startX, startY, DataGridView1.Columns(c).Width, DataGridView1.Rows(r).Height)
e.Graphics.DrawRectangle(Pens.Black, cell)
e.Graphics.DrawString(DataGridView1(c, r).Value, DataGridView1.Font, Brushes.Black, cell, sf)
startX += DataGridView1.Columns(c).Width
Next
startY += DataGridView1.Rows(r).Height
Next
If p <> pages.Count - 1 Then
startPage = p + 1
e.HasMorePages = True
Return
Else
startPage = 0
End If
Next
End Sub
Private Sub PrintAMToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles PrintAMToolStripMenuItem.Click
PrintDocument1.DefaultPageSettings.Landscape = True
PrintDocument1.Print()
End Sub
【问题讨论】：
标签： vb.net printing datagridview