Convert Hashtable

[Joe]

Hi,

I have a Hashtable of string objects that I need to convert to a XML string.
Any ideas how to do this?

Thanks

[Truong Hong Thi]

Re: Convert Hashtable


It depends on the schema of the output XML.
You could use one of the approach.
- Use StringBuilder
- Use XmlWriter
- Use XmlDocument

Could you describe the desired output XML schema?

Thi

http://thith.blogspot.com

Joe wrote:

Hi,
>
I have a Hashtable of string objects that I need to convert to a XML string.
Any ideas how to do this?
>
Thanks

[Joe]

Re: Convert Hashtable

Thanks for the response. The desired output is just the key as the element
with the value. Is StringBuilder the best approach?



"Truong Hong Thi" <thi1981@gmail. comwrote in message
news:1161921961 .454551.197340@ i42g2000cwa.goo glegroups.com.. .

>
It depends on the schema of the output XML.
You could use one of the approach.
- Use StringBuilder
- Use XmlWriter
- Use XmlDocument
>
Could you describe the desired output XML schema?
>
Thi

http://thith.blogspot.com

>
Joe wrote:

>Hi,
>>
>I have a Hashtable of string objects that I need to convert to a XML
>string.
>Any ideas how to do this?
>>
>Thanks

>

[Truong Hong Thi]

Re: Convert Hashtable

Hi,

The StringBuilder is simple and best approach to your requirements.
I guess the desired output is like this:
<key>value</key>
If so, make sure the key is a valid XML identifier.
The safer way is <item key="key">value </item>.
Sample code:
const string pattern = "<item key=\"{0}\">{1} </item>";
StringBuilder buffer = new StringBuilder(" <table>");
foreach (DictionaryEntr y entry in theHashTable)
{
buffer.AppendFo rmat(pattern, entry.Key, entry.Value);
}
buffer.Append(" </table>");
return buffer.ToString ();

Hope it helps,
Thi

http://thith.blogspot.com

Joe wrote:

Thanks for the response. The desired output is just the key as the element
with the value. Is StringBuilder the best approach?

[Marc Gravell]

Re: Convert Hashtable

IMO, using StringBuilder directly is a fairly sure way of introducing
an occasional bug... all you need is a reserved xml character in either
the key or value, and it's broken. That's way too brittle for my
liking.

You can, however, do something like below; fairly hard to break this
via content... also, note that the order of items is not guaranteed by
Hashtable

Marc

Hashtable ht = new Hashtable();
ht.Add("Test", "Something" );
ht.Add("Whateve r", "abcf");
ht.Add("asd", "adsfgaa");

StringBuilder sb = new StringBuilder() ;
using (XmlWriter writer = XmlWriter.Creat e(sb))
{
writer.WriteSta rtElement("item s");
foreach (DictionaryEntr y item in ht)
{
writer.WriteSta rtElement("item ");
writer.WriteAtt ributeString("k ey",
item.Key.ToStri ng());
writer.WriteVal ue(item.Value);
writer.WriteEnd Element();
}
writer.WriteEnd Element();
writer.Flush();
}
Console.WriteLi ne(sb.ToString( ));

[Truong Hong Thi]

Re: Convert Hashtable

Yes, that is safer. XmlWriter should know how to escape illegal
characters.

[Joe]

Re: Convert Hashtable

Thanks for the posts. That makes sense to use XMLWriter and I appreciate
the help.

"Marc Gravell" <marc.gravell@g mail.comwrote in message
news:1161925715 .422869.6790@h4 8g2000cwc.googl egroups.com...

IMO, using StringBuilder directly is a fairly sure way of introducing
an occasional bug... all you need is a reserved xml character in either
the key or value, and it's broken. That's way too brittle for my
liking.
>
You can, however, do something like below; fairly hard to break this
via content... also, note that the order of items is not guaranteed by
Hashtable
>
Marc
>
Hashtable ht = new Hashtable();
ht.Add("Test", "Something" );
ht.Add("Whateve r", "abcf");
ht.Add("asd", "adsfgaa");
>
StringBuilder sb = new StringBuilder() ;
using (XmlWriter writer = XmlWriter.Creat e(sb))
{
writer.WriteSta rtElement("item s");
foreach (DictionaryEntr y item in ht)
{
writer.WriteSta rtElement("item ");
writer.WriteAtt ributeString("k ey",
item.Key.ToStri ng());
writer.WriteVal ue(item.Value);
writer.WriteEnd Element();
}
writer.WriteEnd Element();
writer.Flush();
}
Console.WriteLi ne(sb.ToString( ));
>