convertinput.cs

勇敢者论坛全部源代码。 支持SQL2000/Access数据库

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace doughty_cn.inputcon
{
	/// <summary>
	/// 转换用户的输入。
	/// </summary>
	public sealed class ConvertString
	{

		/// <summary>
		/// 将用户输入的字符串转换为可换行、替换Html编码、无危害数据库特殊字符、去掉首尾空白、的安全方便代码。
		/// </summary>
		/// <param name="inputString">用户输入字符串</param>
		public static string ConvertStr(string inputString)
		{
			string retVal=inputString;
			retVal=retVal.Replace("&","&amp;"); 
			retVal=retVal.Replace("\"","&quot;"); 
			retVal=retVal.Replace("<","&lt;"); 
			retVal=retVal.Replace(">","&gt;"); 
			retVal=retVal.Replace(" ","&nbsp;"); 
			retVal=retVal.Replace("  ","&nbsp;&nbsp;"); 
			retVal=retVal.Replace("\t","&nbsp;&nbsp;");
			retVal=retVal.Replace("\r", "<br>");
			return retVal;
		}

		public static string OutputText(string inputString,int num)
		{
            string retVal;
            if (num == 0)
                retVal = inputString; 
            else
                retVal =newstr(inputString, num);

            retVal = ConvertStr(retVal);
			retVal=retVal.Replace("[url]", "");
			retVal=retVal.Replace("[/url]", "");
			retVal=retVal.Replace("[img]", "");
			retVal=retVal.Replace("[/img]", "");
			retVal= Regex.Replace(retVal,@"\[flash=\d+,\d+](?<x>[^\]]*)\[/flash]",@"$1",RegexOptions.IgnoreCase);
			retVal=retVal.Replace("[flash]", "");
			retVal=retVal.Replace("[/flash]", "");
			return retVal;
		}

		private static string FetchURL( string strMessage)
		{
			string strPattern = @"(?<url>(http|ftp|mms|rstp|news|https)://(?:[\w-]+\.)+[\w-]+(?:/[\w-./?%&~=]*[^.\s|,|\)|<|!])?)";
			string strReplace = "<a href=\"${url}\" target=_blank>${url}</a>";
			string strInput = strMessage;
			string strResult;
			strResult = Regex.Replace(strInput, strPattern, strReplace);
			strPattern = @"(?<!http://)(?<url>www\.(?:[\w-]+\.)+[\w-]+(?:/[\w-./?%&~=]*[^.\s|,|\)|<|!])?)";
			strReplace = "<a href=\"http://${url}\" target=_blank>${url}</a>";
			strResult = Regex.Replace(strResult, strPattern, strReplace);
			return strResult;
		} 

		public static string ToUrl(string inputString)
		{
			string retVal=inputString;
			retVal= ConvertStr(retVal);
			retVal= FetchURL(retVal);
			return retVal;
			//retVal= Regex.Replace(retVal,@"\[url](?<x>[^\]]*)\[/url]",@"<a href=""$1"" target=""_blank"">$1</a>",RegexOptions.IgnoreCase);
			//retVal= Regex.Replace(retVal,@"\[flash=(?<width>\d+),(?<height>\d+)](?<x>[^\]]*)\[/flash]",@"<embed src=""$3"" width=""${width}"" height=""${height}""></embed>",RegexOptions.IgnoreCase);
			//retVal= Regex.Replace(retVal,@"\[flash](?<x>[^\]]*)\[/flash]",@"<embed src=""$1""></embed>",RegexOptions.IgnoreCase);
			//return Regex.Replace(retVal,@"\[img](?<x>[^\]]*)\[/img]",@"<a href=""$1"" target=""_blank""><img src=""$1"" onload=""javascript:if(this.width>screen.width-220)this.width=screen.width-220"" border=1></a>",RegexOptions.IgnoreCase);
		}

		public static string TitleName(string s)
		{
			string retVal = System.Configuration.ConfigurationSettings.AppSettings["ForumName1"];
			s = s.ToLower().Substring(0,20);
			int x=s.IndexOf(System.Configuration.ConfigurationSettings.AppSettings["DomainName2"].ToLower());
			if (x>=0)
			{
				retVal = System.Configuration.ConfigurationSettings.AppSettings["ForumName2"];
			}
			return retVal;
		}

        /// <summary>
        /// 截取字符串
        /// </summary>
        /// <param name="str"></param>
        /// <param name="num"></param>
        /// <returns></returns>
        public static string newstr(string str, int num)
        {
            string str1 = "";
            if (str.Length < num)
            {
                str1 = str;
            }
            else
            {
                str1 = str.Substring(0, num);
            }
            return str1;
        }

	}
}