从网站下载字符串，检查每行是否包含字符串

Question

我创建了一个包含纯文本的简单页面，如下所示：

Line 1
Line 2
Line 3
Line 4

我制作了一个包含文本框的 c# Winform 应用程序 文本框文本类似于

Line 1
Line 2

我想检查文本框行是否包含从我的网站下载的任何字符串

这是我尝试过但没有奏效的

int pub = 0;
int priv  = 0;
WebClient data = new WebClient();
string reply = data.DownloadString("http://mytoosupd.000webhostapp.com/public-keys.html");
for (int i=0; i < textBox1.Lines.Length; i++)
{
if (textBox1.Lines[i].Contains(reply + "n"))
{
pub++;
label5.Text = pub.ToString();
continue;
} 
else if (!textBox1.Lines[i].Contains(reply))
{
priv++;
label4.Text = priv.ToString();
}
}

Answer 1

Split，Intersect，Any就足够简单

了

string reply = data.DownloadString(..);
var result = reply
.Split(new[] {"rn", "r", "n"}, StringSplitOptions.RemoveEmptyEntries)
.Intersect(textBox1.Lines)
.Any();
Debug.WriteLine($"Found = {result}");

更新

// to get a list of the intersected lines, call `ToList()` instead
var list = reply
.Split(new[] {"rn", "r", "n"}, StringSplitOptions.RemoveEmptyEntries)
.Intersect(textBox1.Lines)
.ToList();

// list.Count() to get the count
// use this list where ever you like
// someTextBox.Text = String.Join(Environment.NewLine, list);
// or potentially
// someTextBox.Lines = list.ToArray();