如何在 C# 中打印数组中每页 2 行的值

Question

大家好，我又来了！

我的问题是如何从同一文档中的数组中打印一个序号，因为每页的序号最大值为 2

主场景只打印数据网格视图中选中的行！ 当我检查它添加到数组中的行并打印时，但我需要在数组中获取第一个和第二个值并在同一页面上打印，即使选中的行超过两个。如果我有 6 行检查，那么打印将打印 3 页

我的数据网格视图

checked row = value1
checked row = value2
unchecked row = value3
unchecked row = value4
checked row = value5
unchecked row = value6
unchecked row = value7
checked row = value8
unchecked row = value9
checked row = value10
checked row = value11



Exemple: in the array contains= value1,value2, value5,value8         value10,value11

Document 1 
Page 1
______________________
Value 1       Value 2
______________________
Document 1
Page 2
______________________
Value 5       Value 8
______________________
Document 1
Page 3
______________________
Value 10       Value 11

---

提前谢谢各位，可以根据需要随意格式化这个问题！

Answer 1

    using IDAutomation.NetAssembly;  

    private int currentPrintingIndex = 0;       

    List<string> CheckedValues = new List<string>();

    private void printDocument1_PrintPage(object sender,       System.Drawing.Printing.PrintPageEventArgs e)
    {
     Font fbarra = new Font("IDAutomationSC128S", 10, FontStyle.Regular, GraphicsUnit.Pixel);

 IEnumerable<DataGridViewRow> CheckedValues =    this.dgv1.Rows.Cast<DataGridViewRow>()
        .Where(row => (bool?)row.Cells[0].Value == true)
        .Skip(currentPrintingIndex);

      IEnumerator<DataGridViewRow> cve = CheckedValues.GetEnumerator();
      int count = 0;
      int pos = 60;

      while ((e.HasMorePages = cve.MoveNext()) && count++ < 2)
      {
       var cellValues = cve.Current.Cells.Cast<DataGridViewCell>()
                    .Skip(1)    //instead of .Where(cell => cell.ColumnIndex > 0)
                    .Select(cell => cell.Value.ToString())
                    .ToArray();



       StringBuilder builder = new StringBuilder();

       builder.Append(string.Join(",", cellValues));

       string fullline = builder.ToString();
       string[] column1 = fullline.Split(',');


          var cents = column1[3].Substring(0, 2);
          var descr = column1[1].ToString();

          var descr2 = descr.Substring(0, 30);
          var descr3 = descr.Substring(30);

          var encodeddata1 = Encode.Code128(column1[0].ToString(), 0, false);
          var number = encodeddata1;

 e.Graphics.DrawString(number, fbarra, Brushes.Black, pos, 105);//Barcode

 currentPrintingIndex += 1;

 pos += 150;

Answer 2

这是一个使用List<string> 完成您需要的代码，您可以简单地使用List<DataGridViewRow> 而不是List<string>：

List<string> CheckedValues = new List<string>();
private void button1_Click(object sender, EventArgs e)
{
    CheckedValues = new List<string> { "value1", "value2", "value5", "value8", "value10", "value11" };
    printDocument1.Print();
}

int currentPrintingIndex = 0;
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    //Width of output labels
    var d= this.printDocument1.DefaultPageSettings.PrintableArea.Width / 2;

    //Print first output label
    if (CheckedValues.Count > currentPrintingIndex)
    {
        var currentValue = CheckedValues[currentPrintingIndex];
        e.Graphics.DrawString(currentValue.ToString(),
                    this.Font,
                    new SolidBrush(this.ForeColor),
                    new RectangleF(
                        0,
                        0,
                        d,
                        this.printDocument1.DefaultPageSettings.PrintableArea.Height));

        currentPrintingIndex += 1;
    }

    //Print second output label
    if (CheckedValues.Count > currentPrintingIndex)
    {
        var currentValue = CheckedValues[currentPrintingIndex];
        e.Graphics.DrawString(currentValue.ToString(),
                    this.Font,
                    new SolidBrush(this.ForeColor),
                    new RectangleF(
                        d,
                        0,
                        d,
                        this.printDocument1.DefaultPageSettings.PrintableArea.Height));

        currentPrintingIndex += 1;
    }

    //If there is more item to print, go to next page
    e.HasMorePages = CheckedValues.Count > currentPrintingIndex;
}

输出将是：

Page 1
value 1                                    value 2

Page 2
value 5                                    value 8

Page 3
value 10                                   value 11

这背后的逻辑很简单。我们想在 2 个输出列中显示数据。所以我们应该检查我们是否不在 Checked Cells List 的末尾，打印第一行，然后再次检查我们是否不在 Checked Cells List 的末尾打印第二行，然后检查选中的单元格列表中是否有更多项目，所以我们说使用e.HasMorePages = CheckedValues.Count > currentPrintingIndex; 转到下一页并将打印指针移动到下一个选中的单元格。

编辑

---

这里是 Elton Joani 编辑的终极解决方案

private int currentPrintingIndex = 0;       
List<string> CheckedValues = new List<string>();

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    //Barcode Font
    Font fbarra = new Font("IDAutomationSC128S", 10, FontStyle.Regular, GraphicsUnit.Pixel);

    IEnumerable<DataGridViewRow> CheckedValues = this.dgv1.Rows.Cast<DataGridViewRow>()
    .Where(row => (bool?)row.Cells[0].Value == true)
    .Skip(currentPrintingIndex);

    IEnumerator<DataGridViewRow> cve = CheckedValues.GetEnumerator();
    int count = 0;
    int pos = 60;

    while ((e.HasMorePages = cve.MoveNext()) && count++ < 2)
    {
        var cellValues = cve.Current.Cells.Cast<DataGridViewCell>()
                    .Skip(1)    //instead of .Where(cell => cell.ColumnIndex > 0)
                    .Select(cell => cell.Value.ToString())
                    .ToArray();


        StringBuilder builder = new StringBuilder();
        builder.Append(string.Join(",", cellValues));

        string fullline = builder.ToString();
        string[] column1 = fullline.Split(',');

        var cents = column1[3].Substring(0, 2);
        var descr = column1[1].ToString();
        var descr2 = descr.Substring(0, 30);
        var descr3 = descr.Substring(30);

        var encodeddata1 = Encode.Code128(column1[0].ToString(), 0, false);
        var number = encodeddata1;

        //draw barcode
        e.Graphics.DrawString(number, fbarra, Brushes.Black, pos, 105);
        currentPrintingIndex += 1;

        pos += 150;
    }
}