c#去掉HTML所有标签

    //去除所有的
    public static string ReplaceHtmlTag(string html, int length = 0)
    {
        string strText = System.Text.RegularExpressions.Regex.Replace(html, "<[^>]+>", "");
        strText = System.Text.RegularExpressions.Regex.Replace(strText, "&[^;]+;", "");

        if (length > 0 && strText.Length > length)
            return strText.Substring(0, length);

        return strText;
    }

这个方法放在公共类中，然后后台调用
public StringBuilder Datatech(string name, string sql)
{
StringBuilder str = new StringBuilder();
DataTable dt = sqlhelper.publicFun("select top 6 * from tb_information where " + sql);
if (dt != null)
{
for (int i = 0; i <dt.Rows.Count; i++)
{
DataRow dr = dt.Rows[i];
string content = dr["information_Content"].ToString().Trim();
str.Append("<li class='li_KongGe'>" +
"<ul><li>" +
"<img src='images/rili.png' alt=''" + dr["information_Title"] + "'>" +
"<h4>" + Convert.ToDateTime(dr["information_Time"]).ToLongDateString().ToString() + "</h4>" +
"</li>" +
"<li>" +
"<h5><a href='serviceD.html?information_Id=" + dr["information_Id"]+"'>" + dr["information_Title"] + "</a></h5>" +
"<p>" + sqlhelper.ReplaceHtmlTag(content, 40) + "..." + "</p>" +
"</li>" +
"</ul>" +
"</li>");
}
}
return str;
}
之所以用 string content = dr["information_Content"].ToString().Trim();的作用是去掉所有空格。