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string strContent = TextBox1.Text;
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//(http:\/\/([\w.]+\/?)\S*)
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//http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
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//都是匹配url的正则
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Regex urlregex = new Regex(@"(http:\/\/([\w.]+\/?)\S*)",RegexOptions.IgnoreCase| RegexOptions.Compiled);
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System.Text.RegularExpressions.MatchCollection match=urlregex.Matches(strContent);
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for(int i=0;i<match.Count;i++)
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{
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//"<a href=\"\" target=\"_blank\"></a>");
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strContent = strContent.Replace(match[i].Value,"<a href=\""+match[i].Value+"\">"+match[i].Value+"</a>");
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}
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Label1.Text+= "<br>"+strContent;
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