converting a int variable to a string and passing as a string

I have a variable "StudentID" which is an int, I nee开发者_开发知识库d to convert to a string then pass it to string as a string.

This is what I have so far:

int StuID = Convert.ToString("StudentID");

string ReturnXML = "<Student=\"StuID\" />";

So if the "StudentID" variable were equal to 12345, I need the ReturnXML to look like this:

<Student="12345">

Any suggestions?

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I took the liberty to alter the XML a bit, to make it valid.

int studentId = 42;
string returnXml = string.Format(@"<Student id=""{0}"" />", studentId);
// returnXml will be '<Student id="42" />'

If you want the Student element itself to have the student id value, you probably want to put the value inside the element:

string returnXml = string.Format(@"<Student>{0}</Student>", studentId);
// returnXml will be '<Student>42</Student>'

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Since this is homework I don't want to give you the answer directly, however, look at Int32.ToString() for the string conversion. To build the return XML please look up String.Format() function.

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You can convert an int to an Xml Element like this:

XElement student = new XElement("Student", new XAttribute("Id", stuId));
string returnXml = student.ToString();
// returnXml will be '<Student Id="42" />'

Your XML is not valid, I added an Id tag. The advantage of XElement versus the string format in the other answers is, that you can create complex xml-trees and use queries to filter.

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Why not just use string.Format:

int stuId = 12345;
var returnXml = string.Format("<Student id=\"{0}\" />", stuId);

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string StuID = StudentID.ToString();

string ReturnXML = "<Student=\"" + StuID + "\" />";

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If you need to replace variable name with its value, you can do

int stuId = 1;
string ReturnXML = string.Format("<Student=\"{0}\" />",stuId.ToString());

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this should work:

string StuID = StudentID.ToString();

string ReturnXML = "<Student ID=\"" + StuID + "\" />";