Question

我有一个条件，即程序从文件'assign.txt'中读取行，然后从最后6个下划线中获取数据，然后将该数据写入另一个文件line.txt。

但在将数据写入line.txt之前，我必须检查数据是否已存在于line.txt中，如果是，则跳过或替换现有数据，但line.txt中的每个数据都应该是唯一的文件assign.txt可以包含多行

foreach (string fileLine in File.ReadAllLines("F:\\assign.txt"))
{
    string tel_in = "TELENOR_BTS_INCOMING";

    string telenor = fileLine.ToUpper();

    var delimeter = "_";
    if (telenor.Contains(tel_in))
    {
        var lineParts = fileLine.Split(new[] { delimeter }, StringSplitOptions.None);
        if (lineParts.Length > 1) lineParts = lineParts.Skip(1).ToArray();
        var data = string.Join(delimeter, lineParts.Skip(lineParts.Length - 7));

        lineData.Add(data);

        File.WriteAllLines(@"C:\Users\Adnan Haider\Desktop\line.txt", lineData);
    }
    else
    {
        var lineParts = fileLine.Split(new[] { delimeter }, StringSplitOptions.None);
        if (lineParts.Length > 1) lineParts = lineParts.Skip(1).ToArray();
        var data = string.Join(delimeter, lineParts.Skip(lineParts.Length - 6));

        lineData.Add(data);

        File.WriteAllLines(@"C:\Users\Adnan Haider\Desktop\line.txt", lineData);
    }   
}

这是line.txt示例输出文件

Mobilink_User_dpo_bahawalpur_0506768768685465367658717_1205 42.out Telenor_bts_outgoing_dpo_chakwal_030617_15201696981.out Telenor_bts_outgoing_dpo_chakwal_030617_15201696981.out Telenor_bts_incoming_dpo_chakwal_030617_15201696981.out Telenor_bts_incoming_dpo_chakwal_030617_15201696981.out Ufone_User_dpo_chakwal_030617_15235869694.out

这是assign.txt示例

dpo.chakwal63201732033PM_FL_Telenor_bts_outgoing_dpo_chakwal _030617_15201696981.出 dpo.chakwal63201732033PM_FL_Telenor_bts_outgoing_dpo_chakwal _030617_15201696981.出

上面的行是输出样本line.txt样本，下面的行是输入行assign.txt我想在line.txt中写输出，但首先我必须检查数据是否已存在于{{ 1}}如果是，则跳过或用现有行替换输出，否则将数据写入line.txt

Answer 1

Loops有不同的方法。这是我建议的那个。没有Try / Catch也没有使用（）{}，但你明白了。

string[] m_fileLine = File.ReadAllLines(@"F:\\assign.txt");
StreamWriter m_results = new StreamWriter(@"F:\\results.txt", true);

string tel_in = "TELENOR_BTS_INCOMING";

for (int i = 0; i < m_fileLine.Length; i++)
{
  if (m_fileLine[i].ToUpper().Contains(tel_in))
  {
  // some logic here...
  // then write here...
    m_results.WriteLine(m_fileLine[i].ToString());
    m_results.Flush();
  }
  else
  {
    // else logic and write here...
  }

}

如何避免在c＃中多次添加同一行

1 个答案: