求一正则表达式

[artcodeman]

<img alt="" src="/uploads/test.jpg" width="701" border="0" />

需求获取路径/uploads/test.jpg

[zpcoder]

//注意名字名间： using System.Text.RegularExpressions;

 
   public string ImageSrc(string InputText)
    {
        Match m = Regex.Match(InputText, "(?<=<img.+?src=\")[^\"]+(?=\")", RegexOptions.IgnoreCase);
        
        string src = m.Value;
        m = Regex.Match(InputText, "<img.+?\\/?>", RegexOptions.IgnoreCase);
        return  m.Value;
    }

[artcodeman]

   string str = "<img  src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />"
   System.Text.RegularExpressions.Regex  reg=new  System.Text.RegularExpressions.Regex(@"<img[^>].*?src=""(?<src>[^""].*)""[^>].*?>",System.Text.RegularExpressions.RegexOptions.IgnoreCase);  
            System.Text.RegularExpressions.MatchCollection m = reg.Matches(NewsContents); //设定要查找的字符串
            for (int i = 0; i < m.Count; i++)
            {
                Response.Write(m[i].Groups["src"].ToString()+"<br>");
            }

用上面的代码得出的结果是 /uploads/DSC_0624.JPG" width="701" border="0

[artcodeman]

  string str = "<img  src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />"
   System.Text.RegularExpressions.Regex  reg=new  System.Text.RegularExpressions.Regex(@"<img[^>].*?src=""(?<src>[^""].*)""[^>].*?>",System.Text.RegularExpressions.RegexOptions.IgnoreCase);  
            System.Text.RegularExpressions.MatchCollection m = reg.Matches(str); //设定要查找的字符串
            for (int i = 0; i < m.Count; i++)
            {
                Response.Write(m[i].Groups["src"].ToString()+"<br>");
            }

用上面的代码得出的结果是 /uploads/DSC_0624.JPG" width="701" border="0

[leo_bogard]

up

[lizhengnan]

(?<=src[=]["])[^"]*(?=["])

[lizhengnan]

string str="(?<=src[=]["])[^"]*(?=["])";

[lizhengnan]

不好意思,
(?<=src[=]["])[^"]*(?=["])

不知道为什么CSDN总会自动在里面播入空格.
你自己删一下吧,在?号后面

[artcodeman]

[Quote=引用 7 楼 lizhengnan 的回复:]
不好意思,
(? <=src[=]["])[^"]*(?=["])

不知道为什么CSDN总会自动在里面播入空格.
你自己删一下吧,在?号后面
[/Quote]

提示常量中有换行符

[止戈而立]

string str="<img alt=\"\" src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />";
string result=string.Empty;
Regex reg=new Regex(@"(?<=<img [^>]*src="")[^""]*(?=""[^>]*>)");
result=reg.Match(str).Value;

结果是：/uploads/test.jpg

[artcodeman]

  string str="<img alt=\"\" src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />";
  string result=string.Empty;
  Regex reg=new Regex(@"(?<=<img [^>]*src="")[^""]*(?=""[^>]*>)");
  MatchCollection m = reg.Matches(str);
  for (int i = 0; i < m.Count; i++)
  {
    Response.Write(m[i].Groups["src"].ToString()+"<br>");
  }

想在正则表达式中加入src这个变量，应该如何更改

[止戈而立]

[Quote=引用 10 楼 artcodeman 的回复:]
C# code
string str="<img alt=\"\" src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />";
string result=string.Empty;
Regex reg=new Regex(@"(?<=<img [^>]*src="")[^""]*(?=""[^>]*>)");
MatchCollection m = reg.Matches(str);
for (int i = 0; i < m.Count; i++)
{
Response.Write(m[i].Groups["src"].ToString()+"<br>");
}




想在正则表达式中加入src这个变量，应该如何更改
[/Quote]

  string str="<img alt=\"\" src=\"/uploads/test.jpg\" width=\"701\" border=\"0\" />";
  string result=string.Empty;
  Regex reg=new Regex(@"<img [^>]*src=""(?<src>[^""]*)""[^>]*>");
  MatchCollection m = reg.Matches(str);
  for (int i = 0; i < m.Count; i++)
  {
    Response.Write(m[i].Groups["src"].ToString()+"<br>");
  }