如何将csv分隔符从“"；至“:"；在C#中

本文关键字：quot csv 分隔符 | 更新日期: 2023-09-27 18:30:00

我正在尝试通过读取C#控制台应用程序中的现有CSV文件来生成新的CSV文件。

using (FileStream stream = File.OpenRead("C:''Files''test_input_file.csv"))
using (FileStream writeStream = File.OpenWrite("C:''Files''test_Output_file.csv"))
{
    BinaryReader reader = new BinaryReader(stream);
    BinaryWriter writer = new BinaryWriter(writeStream);
    // create a buffer to hold the bytes 
    byte[] buffer = new Byte[1024];
    int bytesRead;
    // while the read method returns bytes
    // keep writing them to the output stream
    while ((bytesRead = stream.Read(buffer, 0, 1024)) > 0)
    {
        writeStream.Write(buffer, 0, bytesRead);
    }
}

现在我想将输出文件中的分隔符改为"："，而不是"，"

我该怎么做？请帮帮我。

如何将csv分隔符从“"；至“:"；在C#中

因为您正在尝试修改文本字符，所以BinaryReader不适合您的情况。由于编码问题，您需要使用StreamReader。

using (FileStream stream = File.OpenRead("C:''Files''test_input_file.csv"))
using (FileStream writeStream = File.OpenWrite("C:''Files''test_Output_file.csv"))
{
    StreamReader reader = new StreamReader(stream);
    StreamWriter writer = new StreamWriter(writeStream, reader.CurrentEncoding);
    // create a buffer to hold the chars 
    char[] buffer = new char[1024];
    int charsRead;
    // while the read method returns chars
    // keep writing them to the output stream
    while ((charsRead =
            reader.Read(buffer, 0, buffer.Length)) > 0)
    {
        for (int i = 0; i < charsRead; i++)
        {
            if (buffer[i] == ':') buffer[i] = ',';
        }
        writer.Write(buffer, 0, charsRead);
    }
}

什么是编码问题？一个字符可以是1、2或3个字节，甚至7个比特等等。这取决于编码。流读取器将为您处理此问题。

假设：

  • CSV文件以ASCII或UTF-8编码
  • CSV值将不包含任何嵌入的逗号

你可以简单地使用：

for (int i = 0; i < bytesRead; i++)
    if (buffer[i] == ',')
        buffer[i] = ':';
writeStream.Write(buffer, 0, bytesRead);
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