Question

我希望能够使用RegEx来解析范围，例如Windows打印对话框（例如1-50,100-110,111,112）。以下是我目前的代码，我不清楚如何解析其他逗号和数字。我可以解析连字符，但不知道如何使用其他逗号或连字符

private void tboxRowNum_Leave(object sender, EventArgs e)
{
    Regex.Replace(tboxRowNum.Text, @"(?<first>\d+)-(?<last>\d+)",
    new MatchEvaluator(this.parseSpaceDefinition));

}

private string parseSpaceDefinition(Match m)
{
    int first = int.Parse(m.Groups["first"].Value);
    int last = int.Parse(m.Groups["last"].Value);
    StringBuilder sb = new StringBuilder(first.ToString());

    for (int i = first + 1; i <= last; i++)
    {
        if (spaceItems == 0)
        {
            if (isNumeric(sb.ToString(),  System.Globalization.NumberStyles.Integer))
            {
                startingSpace = Convert.ToInt32(sb.ToString());
            }
        }

        sb.Append("," + i.ToString().Replace(" ", ""));

        spaceItems++;
        endingSpace = i;
    }

    tboxRowDesc.Text = sb.ToString();
    return sb.ToString();
}

编辑1：修改后的代码可以获得我想要的内容：

private void tboxRowNum_Leave(object sender, EventArgs e)
{
    string[] parts = tboxRowNum.Text.Split(',');

    for (int i = 0; i < parts.Length; i++)
    {
        if (parts[i].IndexOf('-') >= 0)
        {
            Regex.Replace(parts[i], @"(?<first>\d+)-(?<last>\d+)",
            new MatchEvaluator(this.parseSpaceDefinition));
        }
        else
        {
            int number;
            if(!(int.TryParse(parts[i], out number))) 
            {
                MessageBox.Show("Incomplete/Invalid formula", "Invalid Space Definition");
                tboxRowDesc.Text = "";
            }
            else 
            {
                tboxRowDesc.Text += "," + number;
                spaceItems++;
            }
        }
    }
}

Answer 1

string[] ranges = inputString.split(',');

foreach (string rangeCandidate in ranges) {
   // See if matches regex
}

Answer 2

首先在逗号上拆分它，并为每个部分检查它是否与正则表达式匹配。如果确实如此，那就做你正在做的事情，否则只需使用int.Parse（或int.TryParse来表示健壮性）。

RegEx的范围

2 个答案: