例1
| 代碼如下 |
複製代碼 |
private void button2_Click(object sender, EventArgs e)
{
// Create a request for the URL.
WebRequest request = WebRequest.Create("http://www.111cn.net/");
// If required by the server, set the credentials.
request.Credentials = CredentialCache.DefaultCredentials;
// Get the response.
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
// Display the status.
MessageBox.Show(response.StatusDescription);
Console.WriteLine(response.StatusDescription);
// Get the stream containing content returned by the server.
Stream dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(dataStream, Encoding.Default);
// Read the content.
string responseFromServer = reader.ReadToEnd();
//截取資料
int i = responseFromServer.IndexOf("京");
string dataBid = responseFromServer.Substring(i, 12); // Display the content.
MessageBox.Show(dataBid);
Console.WriteLine(responseFromServer);
// Cleanup the streams and the response.
reader.Close();
dataStream.Close();
response.Close();
} |
C#用Regex獲得指定開始和結束字串中間的一段文本
| 代碼如下 |
複製代碼 |
/// <summary>
/// 獲得字串中開始和結束字串中間得值
/// </summary>
/// <param name="str"></param>
/// <param name="s">開始</param>
/// <param name="e">結束</param>
/// <returns></returns>
public static string GetValue(string str, string s, string e)
{
Regex rg = new Regex("(?<=(" + s + "))[.\s\S]*?(?=(" + e + "))", RegexOptions.Multiline | RegexOptions.Singleline);
return rg.Match(str).Value;
}
/// <summary>
/// 截取字串過多+……
/// </summary>
/// <param name="inputString">字串</param>
/// <param name="len">長度</param>
/// <returns>string</returns>
public static string CutString(string inputString, int len)
{
ASCIIEncoding ascii = new ASCIIEncoding();
int tempLen = 0;
string tempString = "";
byte[] s = ascii.GetBytes(inputString);
for (int i = 0; i < s.Length; i++)
{
if ((int)s[i] == 63)
{
tempLen += 2;
}
else
{
tempLen += 1;
} try
{
tempString += inputString.Substring(i, 1);
}
catch
{
break;
} if (tempLen > len)
break;
}
//如果截過則加上半個省略符號
byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
if (mybyte.Length > len)
tempString += "…"; return tempString;
}
|
調用方法
| 代碼如下 |
複製代碼 |
string get字串="01-藍";
string get後 = get字串.Substring(0, get字串.IndexOf("-"));
這樣擷取的資料是:藍string get後 = get字串.Substring(get字串.IndexOf("-"),get字串.Length - get字串.IndexOf("-")); |
