Question

我有一个.txt文件，其中包含我通过其他项目添加的车辆信息。我想读取文本文件，检索每个VIN编号，并在加载表单时将实际数字本身放在组合框中。 txt文件中每个车辆的信息如下：

型号：＆＃39;型号＆＃39;

制造商：＆＃39;制造商＆＃39;

VIN号码：＆＃39; VIN号码＆＃39;

这就是我所拥有的：

using (StreamReader reader = new StreamReader(@"D:\carCenter\carCenter\bin\Debug\Vehicles.txt"))
        {
            string[] lines = File.ReadAllLines(@"D:\carCenter\carCenter\bin\Debug\Vehicles.txt");
            foreach(string line in lines)
            {
                if (line.Contains("VIN"))
                {
                    Char colon = ':';
                    string[] vins = line.Split(new string[] {"VIN Number: "}, StringSplitOptions.None);

                    for (int i = 0; i < 1; i++)
                    {
                        foreach(var vin in vins)
                        {
                            vinComboBox.Items.Add(vins[i]);
                        }

                    }

                }
            }

Answer 1

一种解决方案是拥有这样的通用功能：

private String GetDataToRightOfLastColon(String line)
{
  line = line.Trim();

  var indexOfLastColon = line.LastIndexOf(':');

  /* If line does not contain a ':' character,
     or ':' is the last non-space character in line,
     throw an exception. */
  if ((indexOfLastColon == -1) || (indexOfLastColon == (line.Length - 1)))
    throw new ArgumentException(
      String.Format("The line '{0}' does not have the correct format.", line));

  return line.Substring(indexOfLastColon + 1).Trim();
}

接下来，通过LINQ应用该功能来处理文本文件并填充组合框：

vinComboBox.Items.AddRange(
  File
  .ReadAllLines(@"D:\carCenter\carCenter\bin\Debug\Vehicles.txt")
  .Where(line => line.Trim().StartsWith("VIN"))
  .Select(line => GetDataToRightOfLastColon(line))
  .ToArray()
);

从文本文件返回值：C＃

1 个答案: