Detailed introduction to XML Special characters

ApprovalSetting: If "& lt; br & gt;" is entered in Approver_Role, what error occurs when applying for the form, because & lt; is encountered when combining XML strings ;. Escape. Special characters in ServiceForFlowER. cs Approval Setting:

If Approver_Role inputs"
", So what error occurred when applying for the form, because the XML string was encountered <. Escape.

ServiceForFlowER. cs

approvalXML += ""                            + "" + GetEmpID(approverTable.Rows[i][entityApprover.Approver.PhysicalFieldName].ToString()) + ""                            + "
 
  " + approverTable.Rows[i][entityApprover.ApprovalOrder.PhysicalFieldName].ToString() + "
 "                            + "" + approverTable.Rows[i][entityApprover.Role.PhysicalFieldName].ToString() + ""                            + "";

PS:

InvalidXMLThe character must be replaced with the corresponding entity.

If you use a character similar to "<" in the XML document, the parser will encounter an error because the parser considers this as the beginning of a new element. Therefore, the code should not be written as follows:

if salary < 1000 then

To avoid this situation, you must convert the character "<" to an object, as shown below:

if salary < 1000 then

The following are five pre-defined entities in the XML document:

<	<	Yu No.
>	>	Yu No.
&	&	And
'	'	Single quotes
"	"	Double quotation marks

The object must start with the symbol "&" and end with the symbol ";".

Note:Only the "<" and "&" characters are strictly forbidden for XML. The rest are legal. it is a good habit to use entities to reduce errors.

The above is a detailed description of the special characters in XML. For more information, see other related articles in the first PHP community!