fck值的截取
fck的值存的是如下的html格式的，我想取得第一个img标记内的值:比如
<img src= "../images/m-l-1.jpg " width= "9 " height= "10 " />
请问该怎么截取？
<b> nbsp; 在 <font color= "red "> .NET技术 ASP.NET </font> 社区发表新贴子：
<a href= "/Expert/help/usehelp.htm " target= "_blank "> 使用说明 </a> <img src= "../images/m-l-1.jpg " width= "9 " height= "10 ">
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<font color= "red "> (请您对您的言行负责，遵守中华人民共和国有关法律、法规,尊重网上道德) </font> </b>
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<hr> <img src= "../images/m-l-2.jpg " width= "9 " height= "10 ">
[解决办法]
正则表达式 表达式我写不来 你发个贴问问
如果你是用javascript的话,直接doucment.getElementsByTagName( 'img ')[0].getAttribute( 'src ')就行
[解决办法]
给一个asp.net1.1 vb.net的例子给你研究学习用
<%@ Page validateRequest= "false " %>
<script language= "VB " runat= "server ">
Sub Enter_Click(Sender As Object, E As EventArgs)
Call SearchSrc(txtContent.Text) '调用函数，输出所有匹配项
End Sub
Sub SearchSrc(strInput As String)
Dim r As Regex
r=New Regex( "src\s*=\s*( " "([^ " "]*) " "|(\S+)) " , RegexOptions.IgNoreCase)
Dim mc As MatchCollection '定义MatchCollection变量
mc=r.Matches(strInput) '返回所有匹配项
message.Text = "共找到 " & mc.Count & "个匹配项 "
Dim I As Integer,m As Match
For I=0 To mc.Count-1
m=mc.Item(I) '返回集合中的第I个匹配项
message.Text &= " <br> 位置 " & m.Index.ToString()
message.Text &= "地址 " & m.Value
Next
End Sub
</script>
<html>
<body>
<form runat=server>
<asp:TextBox id= "txtContent " TextMode= "MultiLine " Cols= "40 " Rows= "8 " runat= "server " />
<asp:Button id= "enter " Text= "确定 " Onclick= "Enter_Click " runat= "server " />
<p> <asp:Label id= "Message " runat=server/>
</form>
</body>
</html>
[解决办法]
int index = origStr.IndexOf( " <img ");
int lenght = origStr.IndexOf( '> ', index) - index;
string strTemp = origStr.Substring(index, lenght);
这样是取得了img的所有内容，去里面的可以用相似的方法