public string GetXmlNodeValue(string xml, string NodeName)
{
int m, n;
string sValue = "";
string xml0 = xml;
//转换成大写
xml = xml.ToUpper();
NodeName = NodeName.ToUpper();
n = xml.IndexOf("<" + NodeName);
//找到字符串的开始符"<"和结束符"/>"，再取出其值
if (n >= 0)
{
for (int i = n + NodeName.Length + 1; i < xml.Length; i++)
{
string c = xml.Substring(i, 1);
if (c == ">")
{
m = xml.IndexOf("</" + NodeName + ">", i + 1);
if (m >= 0)
{
sValue = xml0.Substring(i + 1, m - i - 1);
break;
}
}
else if (c == "/")
{
sValue = "";
break;
}
else if (c == " ")
{
}
else
{
//不正常的结束符号
sValue = "";
break;
}
}
}
//除去空格
return sValue.Trim();
}