StreamWriter语法

Question

我在C＃Winforms上使用StreamWriter

如您所见，我需要将信息写入“作家”。

我做错了什么，因为“作家”字段有语法错误？

我收到一条消息说：

“'Writer'是一个'字段'，但像'类型'”

有什么想法吗？我的代码在下面

 class Booking
    {   
        //what other details do you need to save at the end?...
        public Show bookedShow { get; private set; }
        public Seat selectedSeat { get; private set; }
        public Show selectedShow { get; private set; }
        public Seat finalPrice { get; private set; } //hasnt been defined yet, but this would be the amount of seats selected * the Price

        //i will also need customer details which are:
        public dateAndTime dateTime { get; private set; }
        public Customer custName { get; private set; }
        public Customer custAddress { get; private set; }
        public Customer custTelephone { get; private set; }

        System.IO.StreamWriter writer = new System.IO.StreamWriter(@"C:\BookingInfo.txt"); //open the file for writing.               
        writer.Write(dateTime.ToString()); //write the current date to the file. change this with your date or something.
        writer.write(bookedShow.ToString());
        writer.write(selectedShow.ToString());
        writer.write(selectedSeat.ToString());
        writer.write(finalPrice.ToString());
        writer.write(custName.ToString());
        writer.write(custAddress.ToString());
        writer.write(custTelephone.ToString());
        writer.Close();

    }

Answer 1

您不能在未使用方法（构造函数或其他）的字段上具有语句。

class Booking
{   
    //what other details do you need to save at the end?...
    public Show bookedShow { get; private set; }
    public Seat selectedSeat { get; private set; }
    public Show selectedShow { get; private set; }
    public Seat finalPrice { get; private set; } //hasnt been defined yet, but this would be the amount of seats selected * the Price

    //i will also need customer details which are:
    public dateAndTime dateTime { get; private set; }
    public Customer custName { get; private set; }
    public Customer custAddress { get; private set; }
    public Customer custTelephone { get; private set; }

    public void MyMethod()
    {
      System.IO.StreamWriter writer = new System.IO.StreamWriter(@"C:\BookingInfo.txt"); //open the file for writing.               
      writer.Write(dateTime.ToString()); //write the current date to the file. change this with your date or something.
      writer.Write(bookedShow.ToString());
      writer.Write(selectedShow.ToString());
      writer.Write(selectedSeat.ToString());
      writer.Write(finalPrice.ToString());
      writer.Write(custName.ToString());
      writer.Write(custAddress.ToString());
      writer.Write(custTelephone.ToString());
      writer.Close();
    }
 }

您还应该注意使用正确的外壳 - writer.write 不存在，而 writer.Write 做。

在我的示例中，我已经声明了 writer 作为局部变量 MyMethod 方法。

阅读有关C＃字段的信息 这里.

Answer 2

如果您希望在“创建”类时运行该运行，请使用constructor：

public Booking()
{
        using (System.IO.StreamWriter writer = new System.IO.StreamWriter(@"C:\BookingInfo.txt")) //open the file for writing.             
        { 
                writer.Write(dateTime.ToString()); //write the current date to the file. change this with your date or something.
                writer.Write(bookedShow.ToString());
                writer.Write(selectedShow.ToString());
                writer.Write(selectedSeat.ToString());
                writer.Write(finalPrice.ToString());
                writer.Write(custName.ToString());
                writer.Write(custAddress.ToString());
                writer.Write(custTelephone.ToString());
        }
}

也使用 using 声明使流正确处置。

编辑：除非您有特殊渴望的流，否则可以使用文件类的静态writeallText方法：

public Booking()
{
    File.WriteAllText(@"C:\BookingInfo.txt", string.Concat(dateTime, bookedShow, selectedShow, selectedSeat, finalPrice, custName, custAddress, custTelephone));
}

这样，您不必担心关闭/处置，也不必致电 ToString() 每个类的方法将通过使用 Concat.

Answer 3

首先，您的代码不属于任何方法，如ODED答复。

第二，你 Write() 是正确的，但是 write() （小写的第一个字母）不是。