如何获得与剃刀语法链接到URL文本在ASP.NET MVC 4? [英] How to get links to URLs in text in ASP.NET MVC 4 with Razor syntax?
问题描述
我有一个文本字段的典范。文本的可以包含多个URL。它不必包含URL和它不具有特定的格式。
使用
@ Html.DisplayFor(型号=> model.TextWithSomeUrls)
文字和网址都显示像当然普通文本。我想获得显示为工作虽然单个链接的URL。有没有在ASP.NET /剃刀?
这一个辅助方法修改:现在的输出是:
http://www.google.com,富:酒吧; http://www.yahoo.com
这是完全文本字段的内容。
不过,我想呈现为这样的链接的URL,只有网址:
&LT; A HREF =http://www.google.com&GT; HTTP://www.google.com< / A&gt;中富:酒吧; &所述; A HREF =http://www.yahoo.com&GT; HTTP://www.yahoo.com< / A&GT;
我的解决方案
公共静态部分类HtmlExtensions
{
私人常量字符串urlRegEx = @\"((http|ftp|https):\\/\\/[\\w\\-_]+(\\.[\\w\\-_]+)+([\\w\\-\\.,@?^=%&:/~\\+#]*[\\w\\-\\@?^=%&/~\\+#])?)\"; 公共静态MvcHtmlString DisplayWithLinksFor&LT;的TModel,TProperty&GT;(此的HtmlHelper&LT;的TModel&GT;的HtmlHelper,防爆pression&LT; Func键&LT;的TModel,TProperty&GT;&GT;前pression)
{
字符串内容=的getContent&LT;的TModel,TProperty&GT;(的HtmlHelper,前pression);
字符串结果= ReplaceUrlsWithLinks(内容);
返回MvcHtmlString.Create(结果);
} 私人静态字符串ReplaceUrlsWithLinks(字符串输入)
{
正则表达式RX =新的正则表达式(urlRegEx);
字符串结果= rx.Replace(输入,委托(匹配匹配)
{
字符串的URL = match.ToString();
返回的String.Format(&下; A HREF = \\{0} \\&GT; {0}&下; / A&gt;中,URL);
});
返回结果;
} 私人静态字符串的getContent&LT;的TModel,TProperty&GT;(的HtmlHelper&LT;的TModel&GT;的HtmlHelper,防爆pression&LT; Func键&LT;的TModel,TProperty&GT;&GT;前pression)
{
FUNC&LT;的TModel,TProperty&GT; FUNC =前pression.Compile();
返回FUNC(htmlHelper.ViewData.Model)的ToString();
}
}
此扩展,现在可以在视图中使用:
@ Html.DisplayWithLinksFor(型号=&GT; model.FooBar)
有像没有帮手,但你可以创建自己的自定义帮手或创建一个<一个href=\"http://www.hanselman.com/blog/ASPNETMVCDisplayTemplateAndEditorTemplatesForEntityFrameworkDbGeographySpatialTypes.aspx\"相对=nofollow>模板DisplayFor帮手,其中将包含你需要的逻辑。
I have a model with a text field. The text can contain several URLs. It does not have to contain URLs and it does not have a specific format.
Using
@Html.DisplayFor(model => model.TextWithSomeUrls)
the text and the URLs are displayed like normal text of course. I would like to get the URLs displayed as working individual links though. Is there a helper method for this in ASP.NET / Razor?
Edit: Right now the output is:
http://www.google.com, foo: bar; http://www.yahoo.com
Which is exactly the content of the text field.
But I want to get the URLs and only the URLs rendered as links like this:
<a href="http://www.google.com">http://www.google.com</a>, foo: bar; <a href="http://www.yahoo.com">http://www.yahoo.com</a>
My solution:
public static partial class HtmlExtensions
{
private const string urlRegEx = @"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?)";
public static MvcHtmlString DisplayWithLinksFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
{
string content = GetContent<TModel, TProperty>(htmlHelper, expression);
string result = ReplaceUrlsWithLinks(content);
return MvcHtmlString.Create(result);
}
private static string ReplaceUrlsWithLinks(string input)
{
Regex rx = new Regex(urlRegEx);
string result = rx.Replace(input, delegate(Match match)
{
string url = match.ToString();
return String.Format("<a href=\"{0}\">{0}</a>", url);
});
return result;
}
private static string GetContent<TModel, TProperty>(HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
{
Func<TModel, TProperty> func = expression.Compile();
return func(htmlHelper.ViewData.Model).ToString();
}
}
This extension can now be used in views:
@Html.DisplayWithLinksFor(model => model.FooBar)
There is no helper like that, but you can create your own custom helper or create a template for DisplayFor helper, which will contain logic you need.
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