如何查找字符串并替换文件中的每个匹配项

本文关键字：文件 替换 串并 何查找 查找 字符串 字符 | 更新日期: 2023-09-27 18:00:19

我在不同的行中有39次包含字符串"CRef"的文件，我需要的是将每个"CRref"更改为"CRef1"、"CRef2"、，。。。。。等等

例如输入：

<CrossReferenceSource Self="CRef" AppliedFormat="uf4">Depressed people are often dependent on others emotionally and seek reassurance in ways that distance others. They may often overvalue relationships.
<CrossReferenceSource Self="CRef" AppliedFormat="uf4" Hidden="false">The cognitive symptoms of depression interfere with work. Three ways in which depression may impair work performance are (1) interpersonal relationships (depressed people are seen as irritable, pessimistic, and withdrawn); (2) productivity

输出应为

<CrossReferenceSource Self="CRef1" AppliedFormat="uf4">Depressed people are often dependent on others emotionally and seek reassurance in ways that distance others. They may often overvalue relationships.
<CrossReferenceSource Self="CRef2" AppliedFormat="uf4" Hidden="false">The cognitive symptoms of depression interfere with work. Three ways in which depression may impair work performance are (1) interpersonal relationships (depressed people are seen as irritable, pessimistic, and withdrawn); (2) productivity

我尝试的是在每次比赛中为所有"CRef"和foreach循环使用MatchCollection，但结果是

<CrossReferenceSource Self="CRef12" AppliedFormat="uf4">Depressed people are often dependent on others emotionally and seek reassurance in ways that distance others. They may often overvalue relationships.
<CrossReferenceSource Self="CRef12" AppliedFormat="uf4" Hidden="false">The cognitive symptoms of depression interfere with work. Three ways in which depression may impair work performance are (1) interpersonal relationships (depressed people are seen as irritable, pessimistic, and withdrawn); (2) productivity

等等

这是我尝试过的示例代码：

int Count = 1;
MatchCollection CRef = Regex.Matches(File, @"CRef");
foreach (var item in CRef)
{
    string cross = Regex.Replace(item.ToString(), @"CRef", "CRef" + Count.ToString());
    Count++;
    final3 = final3.Replace(item.ToString(),cross);    
}

如何查找字符串并替换文件中的每个匹配项

看看这个问题，用越来越多的替换正则表达式

对于您的具体情况，应该使用类似的方法：

        string test = "<CrossReferenceSource Self='"CRef'"><CrossReferenceSource Self='"CRef'">";
        Regex match = new Regex("CRef");
        int count = 0;
        string result = match.Replace(test, delegate(Match t)
        {
            return "CRef" + count++.ToString();
        });

如果输入文件是XML文件，则应将其处理为XML，而不是纯文本。

你可以这样做：

var doc = XDocument.Load("file.xml");
var attributes = doc.Root.Descendants("CrossReferenceSource")
                    .Select(e => e.Attribute("Self"))
                    .Where(a => a != null);
int count = 0;
foreach (var a in attributes)
{
    a.Value = "CRef" + (++count);
}
doc.Save("file.xml");
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