从文本文件中删除特定行？ [英] Delete specific line from a text file?

问题描述

我需要删除一个文本文件的确切行，但我不能为我的锻炼如何去这样做的使用寿命。

I need to delete an exact line from a text file but I cannot for the life of me workout how to go about doing this.

任何建议或例子会大大AP preciated？

Any suggestions or examples would be greatly appreciated?

相关问题

<一个href=\"http://stackoverflow.com/questions/532217/efficient-way-to-delete-a-line-from-a-text-file-c\">Efficient方法来删除一个文本文件中的行（C＃）

推荐答案

如果您要删除该行是基于行的内容：

If the line you want to delete is based on the content of the line:

string line = null;
string line_to_delete = "the line i want to delete";

using (StreamReader reader = new StreamReader("C:\\input")) {
    using (StreamWriter writer = new StreamWriter("C:\\output")) {
        while ((line = reader.ReadLine()) != null) {
            if (String.Compare(line, line_to_delete) == 0)
                continue;

            writer.WriteLine(line);
        }
    }
}

或者，如果它是基于行数：

Or if it is based on line number:

string line = null;
int line_number = 0;
int line_to_delete = 12;

using (StreamReader reader = new StreamReader("C:\\input")) {
    using (StreamWriter writer = new StreamWriter("C:\\output")) {
        while ((line = reader.ReadLine()) != null) {
            line_number++;

            if (line_number == line_to_delete)
                continue;

            writer.WriteLine(line);
        }
    }
}

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