c# 替换字符串

Question

<?xml version=\"1.0\" encoding=\"utf-16\"?>........后面很多
我想把
encoding=\"utf-16\ 换成 encoding=\"utf-8\ 求高手解答

Answer 1

如果是 XmlDocument 对象的话，改变 XmlDeclaration 

Answer 2

字符串的话你直接把utf-16替换成utf-8不就完了

Answer 3

  string source = "<?xml version=\"1.0\" encoding=\"utf-16\"?>dfdds<?xml version=\"1.0\" encoding=\"utf-16\"?>";
            source = Regex.Replace(source, @"(?is)(?<=<\?xml[^>]*?encoding=""utf-)\d+(?=""[^>]*?\?>)", "8");

Answer 4

这样也可以
 string source = "<?xml version=\"1.0\" encoding=\"utf-16\"?>dfdds<?xml version=\"1.0\" encoding=\"utf-16\"?>";
            source = source.Replace("encoding=\"utf-16\"", "encoding=\"utf-8\"");

Answer 5

StringBuilder sb = new StringBuilder();
            using (XmlWriter xmlRp = XmlWriter.Create(sb))
            {
                ArDesigner.Report.Run(true);
                ArDesigner.Report.SaveLayout(xmlRp);
                xmlRp.Close();
            }
            string s = sb.ToString();
            s.Replace(@"encoding=\\\""utf-8\\\", @"encoding=\\\""utf-16\\\");
            XmlDocument xmldocument = new XmlDocument();
            xmldocument.CreateXmlDeclaration("1.0", "UTF-8", "yes");
            xmldocument.LoadXml(s);上面是代码