如何在文件中替换2个双引号

Question

I have 2 double quotes that need to be replaced by a single double quote.

I am using this method:

private static void ReplaceTextInFile(string originalFile, string outputFile, string searchTerm, string replaceTerm)
{
    string tempLineValue;
    using (FileStream inputStream = File.OpenRead(originalFile))
    {
        using (StreamReader inputReader = new StreamReader(inputStream))
        {
            using (StreamWriter outputWriter = File.AppendText(outputFile))
            {
                while (null != (tempLineValue = inputReader.ReadLine()))
                {
                    outputWriter.WriteLine(tempLineValue.Replace(searchTerm, replaceTerm));
                }
            }
        }
    }
}

and calling it this way

ReplaceTextInFile(file, file + "new", (char)34 + (char)34, (char)34);

the error i am getting is

Error   4   Argument '3': cannot convert from 'int' to 'string' 

and  Error  5   Argument '4': cannot convert from 'char' to 'string'    

what am i doing wrong?

Answer 1

(char)34+(char)34 is an int , with value 68.
The function is expecting a string.

I would pass "\\"\\""
(escaping each double-quote with a back-slash)

ReplaceTextInFile(file, file + "new", "\"\"", "\"");

Answer 2

我会使用ReplaceTextInFile(file, file + "new", "\\"\\"", "\\"");

Answer 3

You're calling this method with an Int32 ( char + char == int ) and a Char , not two string values. Why not just use?:

ReplaceTextInFile(file, file + "new", "\"\"", "\"");

Answer 4

The function expects four string s. You pass two string s, and then an int , and then a char .

Adding two char s results in an int . You can't concatenate chars, it makes no sense as a char represents an individual character, so the result is an int .

The last one is a straight cast to char where a string is expected, that seems obvious enough.