how to convert string to system.data.dataset

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In my webmethod., i am doing this

C#

[WEBMETHOD]
 XDocument xd = XDocument.Load(@"D:\satish1\na.xml");
            var query = from p in xd.Descendants("item")
                        select new
                        {
                            name = p.Element("title").Value,
                            des = p.Element("description").Value
                        };
            return query.ToString();

when I want to consume this method , i am writing this

C#

WpfApplication1.ServiceReference1.Service1SoapClient proxy = new WpfApplication1.ServiceReference1.Service1SoapClient();
            DataSet ds = proxy.getdetails();
          
            ds.WriteXml(@"D:\satish1\sb.xml", XmlWriteMode.WriteSchema);

I am not able to use ds.write xml method ,and save the xml output in my system. It is saying cannot convert system.data.dataset,
In my webmethod iam returning strings can i return xml there, also in my proxy call can I convert that string to system.data.dataset.

please tell me in some code

Posted 19-Dec-11 17:40pm

satishmachineni

Updated 19-Dec-11 17:56pm

m@dhu

v2

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Comments

Sergey Alexandrovich Kryukov 20-Dec-11 0:34am

In what line "it is saying"?
--SA

satishmachineni 20-Dec-11 0:42am

when i conume the webmethod ,and write
ds=proxy.getdetails();
it is saying that thing.
what i want to do actually is
write the thing likr that and stote it using
ds.writexml(path,xmlwritemode.writeschema)

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-12-19T18:52:00

The question is a result of totally broken logic. Suppose a compiler tells you "cannot convert type A into type B". It is very illogical to use this fact to ask a question "OK, and how can I convert A into B?". Just the opposite, it's most likely the indication that using the type A where type B is expected simply makes no sense.

Take a question about "conversion" of a string into a DataSet. It makes no sense. Generally string is a string, it is not "converted" into anything except may be another object which is a different technical representation of the idea of string, such as null-terminated string or something else.

Even though in same cases a string can represent a Dataset, but there is no such operation as "conversion". It can be serialization of some object or object graph into a string in some format, for example, based on XML or JSON, which deserialization used to re-create an object or an object graph equivalent to original one. It could be parsing of such format. Whatever it is, it cannot be called "conversion".

In your code sample, your DataSet probably has no current schema you are trying to right. In this case you cannot right anything, according to http://msdn.microsoft.com/en-us/library/system.data.xmlwritemode.aspx[^].

It is not clear to me where your exception comes from, as you did not clearly indicate what did you face with: an exception or compilation error, what was exact message, line of code and other relevant information. You should always provide such information in a comprehensive way when asking questions.

—SA