此代码用于使用Xe.com的货币转换器 [英] This code is use for Currency Convertor using Xe.com

问题描述

public void currency（string srcCurrency，string dstCurrency）

{

string xeString = String.Format（http://www.xe.com/ucc/ convert.cgi？Amount = 1&From = {0}&To = {1}，srcCurrency，dstCurrency）;

System.Net.WebRequest wreq = System.Net.WebRequest.Create（new Uri（xeString） ））;

System.Net.WebResponse wresp = wreq.GetResponse（）;

Stream respstr = wresp.GetResponseStream（）;

int read = respstr.Read（buf，0，BUFFER_SIZE）;

string result = Encoding.ASCII.GetString（buf，0，read）;

}







错误：错误16当前上下文中不存在名称'BUFFER_SIZE'

public void currency(string srcCurrency,string dstCurrency)
{
string xeString = String.Format("http://www.xe.com/ucc/convert.cgi?Amount=1&From={0}&To={1}", srcCurrency, dstCurrency);
System.Net.WebRequest wreq = System.Net.WebRequest.Create(new Uri(xeString));
System.Net.WebResponse wresp = wreq.GetResponse();
Stream respstr = wresp.GetResponseStream();
int read = respstr.Read(buf, 0, BUFFER_SIZE);
string result = Encoding.ASCII.GetString(buf, 0, read);
}



error:Error 16 The name 'BUFFER_SIZE' does not exist in the current context

推荐答案

您没有声明变量 BUFFER_SIZE 。可能你已经在课程顶部创建了变量&将更多代码移到某个地方。检查 Stream.Read方法 [ ^ ]

You didn't declare the variable BUFFER_SIZE. Possibly you had created the variable at top of the class & moved that with some more code to somewhere. Check Stream.Read Method[^]

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