I am having a input stream which is generated when I upload a file(XML Type). I need the XML data at code behind. I am having the xml data in string by using
StreamReader stream = new StreamReader(Request.InputStream);
string x = stream.ReadToEnd();
It also contains the following data at the start of the string
------WebKitFormBoundary8na5dBbHc4ydfxVU
Content-Disposition: form-data; name="MyFile"; filename="Test 123.vfc"
Content-Type: application/octet-stream
at the end of the string
------WebKitFormBoundary8na5dBbHc4ydfxVU--
This data is not required for me. Please help me in getting the right XML String.
First you can remove the first three lines and last line from your string.
int n = 3;
string[] lines = str.Split(Environment.NewLine.ToCharArray()).Skip(n).ToArray();
string output = string.Join(Environment.NewLine, lines);
output = output.Remove(str.LastIndexOf(Environment.NewLine));
In your XML string if you don't have a root node then add it like following.
string xmlTxt = "<ROOT>" + xmlString + "</ROOT>";
If you have a root node skip above. For a well format XML string you can just use below code
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.InnerXml = xmlTxt;
Related
I have a problem with parsing file with XmlReader. I have a file containing info like this:
<Users>
<User>
<Email>email</Email>
<Key>23456</Key>
</User>
</Users>
asdfsof48f43uf489f3yf3y39fh3f489f3hf94[t]45.54tv,]5t
File contains xml values and then encrypted data from byte[] array.
The problem I've encountered is when i use:
using (var reader = XmlReader.Create(fileName))
{
while (reader.Read())
{
//parsing
}
}
I got 'System.Xml.XmlException' at line where encrypted bytes begin.
My question is: how to retrieve only xml part and only byte[] part?
If in case the encrypted data is always the last line you can use below snippet to read only XML part of data given that the XML data is limited in size
var fileLines = File.ReadAllLines(#"c:\temp\file.txt");
var xmlFromFile = string.Join("", fileLines, 0, fileLines.Length - 1);
using (var reader = XmlReader.Create(new StringReader(xmlFromFile)))
{
// Your logic goes here
}
you can do string parsing...
int start, end;
string myFile = File.ReadAllText("...");
start = myFile .IndexOf("<Users>");
end = myFile .IndexOf("</Users>") + 8;
myFile = myFile.Substring(start, end-start);
At that point you can load it into a xml document if you want. This all depends on you being 100% sure about the file format. This is a pretty fragile answer, so don't use it if you don't have a total trust in your input file.
I have string of XML .
how can I change the header from:
string xml = "<?xml version='1.0' encoding='ISO-8859-8'?>";
to
string xml = "<?xml version='1.0' encoding='UTF-8'?>";
using c#?
UPDATE
I tryed to get the xml to User object
XmlSerializer serializer = new XmlSerializer(typeof(User));
MemoryStream memStream = new MemoryStream(Encoding.UTF8.GetBytes(xml));
User user = (User)serializer.Deserialize(memStream);
but in the User object I get the string not encoding well.
because of the encoding of the Xml I need to change the encoding.
Instead of Encoding.UTF8.GetBytes use Encoding.GetEncoding("ISO-8859-8").GetBytes.
If the XML is stored in a string variable and you need to only replace the value in the encoding attribute, then you can perform a replace as following:
const string searchEncoding = "ISO-8859-8";
const string newEncoding = "UTF-8";
string xml = #"<?xml version='1.0' encoding='ISO-8859-8'?><abc></abc>";
int encodingPos = xml.IndexOf(searchEncoding);
if (encodingPos==30)
{
xml = xml.Substring(0, encodingPos) + newEncoding + xml.Substring(encodingPos + searchEncoding.Length);
}
However, a different process is necessary if the XML is stored in another datatype and/or you need to re-encode the XML content.
I am trying to replace within a string
<?xml version="1.0" encoding="UTF-8"?>
<response success="true">
<output><![CDATA[
And
]]></output>
</response>
with nothing.
The problem I am running into is the characters <> and " characters are interacting within the replace. Meaning, it's not reading those lines as a full string all together as one but breaking the string when it comes to a <> or ". Here is what I have but I know this isn't right:
String responseString = reader.ReadToEnd();
responseString.Replace(#"<<?xml version=""1.0"" encoding=""UTF-8""?><response success=""true""><output><![CDATA[[", "");
responseString.Replace(#"]]\></output\></response\>", "");
What would be the correct code to get the replace to see these lines as just a string?
A string will never change. The Replace method works as follows:
string x = "AAA";
string y = x.Replace("A", "B");
//x == "AAA", y == "BBB"
However, the real problem is how you handle the XML response data.
You should reconsider your approach of handling incoming XML by string replacement. Just get the CDATA content using the standard XML library. It's as easy as this:
using System.Xml.Linq;
...
XDocument doc = XDocument.Load(reader);
var responseString = doc.Descendants("output").First().Value;
The CDATA will already be removed. This tutorial will teach more about working with XML documents in C#.
Given your document structure, you could simply say something like this:
string response = #"<?xml version=""1.0"" encoding=""UTF-8""?>"
+ #"<response success=""true"">"
+ #" <output><![CDATA["
+ #"The output is some arbitrary text and it may be found here."
+ "]]></output>"
+ "</response>"
;
XmlDocument document = new XmlDocument() ;
document.LoadXml( response ) ;
bool success ;
bool.TryParse( document.DocumentElement.GetAttribute("success"), out success) ;
string content = document.DocumentElement.InnerText ;
Console.WriteLine( "The response indicated {0}." , success ? "success" : "failure" ) ;
Console.WriteLine( "response content: {0}" , content ) ;
And see the expected results on the console:
The response indicated success.
response content: The output is some arbitrary text and it may be found here.
If your XML document is a wee bit more complex, you can easily select the desired node(s) using an XPath query, thus:
string content = document.SelectSingleNode( #"/response/output" ).InnerText;
I have this line of code that retrieves and XML file and saves it to an SPFile
SPFile XMLFile = SPContext.Current.Web.GetFile("C:\\Users\\maleem\\Documents\\XMLTest.xml");
I want to get the XML/Text within it and output it to a literal, I tried
StreamReader reader = new StreamReader(XMLFile.OpenBinaryStream());
And a few variants but its not working.
If you use the OpenBinary method of SPFile the return is a byte array you can then convert it into a string.
Depending on the encoding you can try this:
For default encoding:
string str = System.Text.Encoding.Default.GetString(XMLFile.OpenBinary());
For UTF8:
string str = System.Text.Encoding.UTF8.GetString(XMLFile.OpenBinary());
I store the XML output to String and Again convert this string to XML .I successfully convert XML output to String, but i got problem again converting string to XML.
sample code:
webservice.Service1 objService1 = new webservice.Service1();
String s = objService1.HelloWorld(); //Convert XML output into String
XmlDocument xd = new XmlDocument();
xd.LoadXML(s);
I use LoadXML() method, but i got error
Data at the root level is invalid. Line 1 position 1.
Its grateful, if any body give right code to convert String To XML in c#.
Thank you,
You should use XDocument. XDocument is better than XMLDocument. It is very efficient, simple and easy to use.
Your code :
webservice.Service1 objService1 = new webservice.Service1();
String s = objService1.HelloWorld(); //Convert XML output into String
XmlDocument xd = new XmlDocument();
xd.LoadXml(s);
Solution:
XDocument xd = XDocument.Parse(s);
XmlDocument xd = new XmlDocument();
xd.LoadXml("<root>123</root>");
It works.
You should print the s value and check it is a valid xml string.