C # how to format field data when dataset content is written as XML

To achieve this purpose, you can adopt the following two methods:
◆ Use the xmlconvert class.
◆ Use An XSLT conversion set to XML Representation of dataset data.
Program Example
This example uses the xmlconvert class to format fields. CopyCode The Code is as follows: // import the namespace.
Using system. xml;
Using system. Data. sqlclient;
Using system. IO;
Private void btnwritedatasettoxml_click (Object sender, eventargs E)
{
String myxmlfile = @ "C: \ datasetoutputxml. xml ";
Try
{
// Create an xmltextreader object to read XML data.
Using (xmltextreader myxmlreader =
New xmltextreader (Ds. getxml (), xmlnodetype. element, null ))
{
// Create an xmltextwriter object using the specified file and encoding method.
Using (system. xml. xmltextwriter myxmlwriter =
New system. xml. xmltextwriter (myxmlfile, encoding. utf8 ))
{
Myxmlwriter. Formatting = formatting. indented;
Myxmlwriter. indentation = 4;
Myxmlwriter. writestartdocument ();
String elementname = "";
// Parse and display each node.
While (myxmlreader. Read ())
{
Switch (myxmlreader. nodetype)
{
Case xmlnodetype. element:
Myxmlwriter. writestartelement (myxmlreader. Name );
Elementname = myxmlreader. Name;
Break;
Case xmlnodetype. Text:
Switch (elementname. tolower ())
{
Case "Date of Birth ":
// The date and time data to be converted to a string must be formatted in a custom format string.
Myxmlwriter. writestring (xmlconvert. todatetime (myxmlreader. value,
Xmldatetimeserializationmode. Local). tostring (
"Dddd, Mmmm DD, yyyy, HH: mm: SS seconds "));
Break;
Case "employment date ":
Case "salary increase date ":
// The date and time data to be converted to a string must adopt the short date mode.
Myxmlwriter. writestring (xmlconvert. todatetime (myxmlreader. value,
Xmldatetimeserializationmode. Local). tostring ("D "));
Break;
Case "starting salary ":
Case "current salary ":
// The salary value to be converted to a string must be in the currency format.
Myxmlwriter. writestring (xmlconvert. todecimal (
Myxmlreader. Value). tostring ("C "));
Break;
Default:
Myxmlwriter. writestring (myxmlreader. value );
Break;
}
Break;
Case xmlnodetype. endelement:
Myxmlwriter. writeendelement ();
Break;
}
}
}
}
// Read the output XML file and display its content in the textbox text box.
Txtxmlresult. Text = file. readalltext (myxmlfile );
}
Catch (exception ex)
{
MessageBox. Show (ex. Message );
}
}

Note: In the switch, the value after each case is the column name. Please modify it as needed.