如何在Windows窗体应用程序中的多个页面中打印数据集

问题描述

大家好.......



我想在Windows窗体应用程序中打印数据集。在我的数据集中有5行3列，我想每页打印两行 .means 将有3页打印整个数据集。我的代码是

Hi Everyone.......

I want to print a data-set in windows form application . In my dataset there are 5 rows and 3 columns , and i want to print two rows per pages .means there will be 3 pages to print whole data-set. My code is

float CurrentX = 20;//This is for X axis
float CurrentY = 100; //This is for Y axis
 int linesPerPage = 2;
 int count = 0;

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
           
            foreach (DataRow Dr in ds.Tables[0].Rows)
            {
                foreach (DataColumn dc in ds.Tables[0].Columns)
                {
                    e.Graphics.DrawString(Dr[dc].ToString(), DefaultFont, Brushes.Black, CurrentX, CurrentY);
                    CurrentX = CurrentX + 50;//Increment  of X axis by 50
                }
                CurrentY = CurrentY + 100;//Increment of Y axis by 100 for new  row
                CurrentX = 20; //Initialize the X axis for start the same position 
                count = count + 1;//Increment the count 

                if (count > linesPerPage)
                {
                    e.HasMorePages = true;                                 
                }
                else e.HasMorePages = false;
            }         

        }

但是这里的页数达到无穷大且结果不会到来。实际上

e.HasMorePages逻辑没有清除给我，我尝试实现逻辑，但每次我失败。哪里有错误，请提出一些建议。



谢谢....

But here number of pages in going to infinity and result is not coming . actually
e.HasMorePages logic is not cleared to me, i try to implement the logic but every time i failed. Where is the mistake , please suggest some things .

Thank You....

推荐答案

  Dim pageLine As Integer = 1
  Dim lpp As Integer = CInt(Math.Floor((e.MarginBounds.Bottom - y) / 18))

  For i As Integer = _curRow To _linesReq

  Do While (pageLine <= lpp) And (_curRow <= _linesReq)

    ' Print some stuff

    y += h
    _curRow += 1
    pageLine += 1
  Loop

  If (pageLine >= lpp) And (_curRow <= _linesReq) Then
	page += 1
	pageLine = 1
	e.HasMorePages = True
	Exit For
  Else
	e.HasMorePages = False
        Exit For
  End If
Next

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