不需要使用 c# 打印重复值 [关闭]

Question

这是我打印“m_USTByDoctor_OPDC.ml_trn_bill_item”的代码，值来自数据库。

for (int i = 0; i < m_USTByDoctor_OPDC.ml_trn_bill_item.Count;i++ )
   {

   int count = 0;
  for (int j = 0; j m_USTByDoctor_OPDC.ml_trn_bill_item.Count; j++)
                {
if(m_USTByDoctor_OPDC.ml_trn_bill_item[j].ItemName==m_USTByDoctor_OPDC.ml_trn_bill_item[i].ItemName)
                    {
                        count++;
                    }
                }

                Add_Cell(m_USTByDoctor_OPDC.ml_trn_bill_item[i].ItemName, ref tbl_summaryContent3, HELVETICA_BOLD_8_BLACK, false, Rectangle.ALIGN_LEFT, Rectangle.ALIGN_MIDDLE);
                Add_Cell(count.ToString(), ref tbl_summaryContent3, HELVETICA_NORMAL_8_BLACK, false, Rectangle.ALIGN_LEFT, Rectangle.ALIGN_MIDDLE);
            }

这是我在你那里得到的输出重复值我也需要消除它我该怎么做

   Abdomen & Pelvic Scan IP   3
    Abdomen & Pelvic Scan IP   3
    Abdomine Pelvic Scan - OP   5
    Abdomine Pelvic Scan - OP   5
    Anamoly Scan (Single) - OP  1
    Abdomine Pelvic Scan - OP  5
    Abdomine Pelvic Scan - OP  5
    Abdomine Pelvic Scan - OP  5
    ANC/Obstetrics Scan(OP)    1
    Abdomen & Pelvic Scan IP  3

Answer 1

您可以使用GroupBy linq 扩展方法：

foreach (var group in m_USTByDoctor_OPDC.ml_trn_bill_item.GroupBy(i => i.ItemName))
{
    Add_Cell(group.Key, ref tbl_summaryContent3, HELVETICA_BOLD_8_BLACK, false, Rectangle.ALIGN_LEFT, Rectangle.ALIGN_MIDDLE);
    Add_Cell(group.Count().ToString(), ref tbl_summaryContent3, HELVETICA_NORMAL_8_BLACK, false, Rectangle.ALIGN_LEFT, Rectangle.ALIGN_MIDDLE);
}