Question

我试图根据数据集中给定的记录数循环要打印的文本文件但它只是覆盖整个页面而无法继续并创建第二页。任何人都可以帮我处理我的代码。感谢

//Calling the Print Document Event and the TextFile 

     private void button1_Click(object sender, EventArgs e){
                string text = System.IO.File.ReadAllText
                (Application.StartupPath+"\\tempnotice_planet.txt");
                string printPath = Application.StartupPath + "\\tempnotice_planet.txt";
                streamToPrint = new StreamReader(printPath);
                printFont = new System.Drawing.Font("Arial", 10);
                printDocument1.Print();
                streamToPrint.Close();
            }


//Printing Code
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs ev)
    {


        float yPos = 0f;
        int count = 0;
        float leftMargin = ev.MarginBounds.Left;
        float topMargin = ev.MarginBounds.Top;
        string line = null;
        int i = 0;



        for (i = 0; i <= records.Tables["Files"].Rows.Count - 1; i++)
        {
            // Calculate the number of lines per page.

    float linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics);

    // Print each line of the file. 
            while ((count < linesPerPage && ((line = streamToPrint.ReadLine()) != null)))
            {

                yPos = topMargin + count * printFont.GetHeight(ev.Graphics);
                ev.Graphics.DrawString(line, printFont, Brushes.Black, leftMargin, yPos, new StringFormat());
                count++; 
            }

    //after a set of textfile printed..Return to the begining of the textfile to print it again for next batch
    //Continuos Printing
            if (streamToPrint.EndOfStream)
            {
                streamToPrint.DiscardBufferedData();
                streamToPrint.BaseStream.Seek(2, SeekOrigin.Begin);
                ev.HasMorePages = true;
            }

              if (count > linesPerPage)
              {
                  ev.HasMorePages = true;
                  count = 0;
              }
              else
              {
                  ev.HasMorePages = false;
              }

           }


        }

Answer 1

printDocument1_PrintPage只能打印一页，然后退出。它应该将ev.HasMorePages设置为true，除非在打印完最后一页之后，它应该是假的。

您可以在呼叫之间单独保留文件位置。摆脱外循环：

for (i = 0; i <= records.Tables["Files"].Rows.Count - 1; i++)

多页打印文本文件

1 个答案: