Question

This code is programmed to display some data values from alot of xml files is their anyway to alter it so that it write the values to a dataset/table?

    static void Main(string[] args)
    {
        string[] fileEntries = Directory.GetFiles(@"c:\Sciclone UAC", "*.cfg*");
        foreach (string fileName in fileEntries)
        {
            XDocument doc = XDocument.Load(fileName);
            var query = from x in doc.Descendants("XAxisCalib")
                        select new
                       {
                            //Max1 = x.Attribute("Max").Value,
                            //Min2 = x.Attribute("Min").Value


                            MaxChild = x.Descendants("Max"),
                            MinChild = x.Descendants("Min")
                        };

            foreach (var x in query)
            {
                foreach (var nextLevel in x.MaxChild)
                {
                    Console.WriteLine("XMax: " + nextLevel.Value);
                }
                foreach (var nextLevel in x.MinChild)
                {
                    Console.WriteLine("XMin: " + nextLevel.Value);
                }
                //Console.WriteLine("XAxisCalib");
            }



            var query2 = from y in doc.Descendants("YAxisCalib")

                         select new
                         {

                             //Max3 = x.Attribute("Max").Value,

                             //Min4 = x.Attribute("Min").Value

                             MaxChild = y.Descendants("Max"),
                             MinChild = y.Descendants("Min")

                         };


            foreach (var y in query2)
            {
                foreach (var nextLevel in y.MaxChild)
                {
                    Console.WriteLine("YMax: " + nextLevel.Value);
                }
                foreach (var nextLevel in y.MinChild)
                {
                    Console.WriteLine("YMin: " + nextLevel.Value);
                }

                //Console.WriteLine("YAxisCalib");



                var query3 = from z in doc.Descendants("ZAxisCalib")

                             select new
                             {

                                 //Max5 = x.Attribute("Max").Value,

                                 //Min6 = x.Attribute("Min").Value

                                 MaxChild = z.Descendants("Max"),
                                 MinChild = z.Descendants("Min")
                             };

                foreach (var z in query3)
                {
                    foreach (var nextLevel in z.MaxChild)
                    {
                        Console.WriteLine("ZMax: " + nextLevel.Value);
                    }
                    foreach (var nextLevel in z.MinChild)
                    {
                        Console.WriteLine("ZMin: " + nextLevel.Value);
                    }

                    //Console.WriteLine("ZAxisCalib");

                }

            }

        }
    }
}

}

Answer 1

I don’t know if I’m missing something, but what about the DataSet.ReadXml method?:

DataSet ds = new DataSet();
ds.ReadXml("myxmlfile.xml");              

The ReadXml() method has an overload for passing in XmlReadMode, which provides various options handling the schema.

In your case, assuming that you want to read each XML file into it’s own DataSet, you can do something like this:

string[] fileEntries = Directory.GetFiles(@"c:\Sciclone UAC", "*.cfg*"); 
foreach (string fileName in fileEntries) 
{ 
    DataSet ds = new DataSet();
    ds.ReadXml(fileName, XmlReadMode.InferSchema);
}

To read the XML files into the same DataSet, you can do something like this:

DataSet masterSet = new DataSet();

string[] fileEntries = Directory.GetFiles(@"c:\Sciclone UAC", "*.cfg*"); 
foreach (string fileName in fileEntries) 
{ 
    //initialize a new dataset and read the xml into it
    DataSet tempSet = new DataSet();
    tempSet.ReadXml(fileName, XmlReadMode.InferSchema);

    //merge the tables from the temporary datset into the master dataset
    foreach (DataTable table in tempSet.Tables)
        masterSet.Merge(table);        
}

Here’s another way of doing the same thing, using the enumerable LINQ methods:

DataSet masterSet = new DataSet();

string[] fileEntries = Directory.GetFiles(@"c:\Sciclone UAC", "*.cfg*"); 
foreach (string fileName in fileEntries) 
{ 
    //initialize a new dataset and read the xml into it
    DataSet tempSet = new DataSet();
    tempSet.ReadXml(fileName, XmlReadMode.InferSchema);

    //merge the tables from the temporary datset into the master dataset
    tempSet.Tables.Cast<DataTable>().ToList().ForEach(table => masterSet.Merge(table));  
}

One of the XmlReadMode enumerations should definitely suit your needs.

• Auto
• DiffGram
• Fragment
• IgnoreSchema
• InferSchema
• InferTypedSchema
• ReadSchema

Here is a link on MSDN that explains what the different XmlReadMode enumerations do:
http://msdn.microsoft.com/en-us/library/system.data.xmlreadmode.aspx