Question

assigning attributes to a dataset table

Asked by: sotea

Here is a simple webservice returning a dataset with a table (MyTable1) containing one coloumn (ID) as xml.
I would like to assign some attributes to both 'MyTable1' and 'ID'.
How to do that

See below - sourcecode, existing xml response, desired xml response:

Hope you get the point - or ask me to clarify... Thanks;-)

Sourcecode:
---------------------------------------------------------------------------
[WebMethod]
public DataSet MyDataSet()    
{
    DataSet ds = new DataSet("MyDS");
               
    DataTable dt = new DataTable("MyTable1");
    dt.Columns.Add("ID");
    ds.Tables.Add(dt);

    DataRow datarow = ds.Tables["MyTable1"].NewRow();
    datarow["ID"] = "Test";
    ds.Tables["MyTable1"].Rows.Add(datarow);

    return ds;
}
------------------------------------------------------------------

Xml response:
-------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<DataSet xmlns="http://tempuri.org/">
  <xs:schema id="MyDS" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     .........................
     .........................
  </xs:schema>
  <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
    <MyDS xmlns="">
      <MyTable1 diffgr:id="MyTable11" msdata:rowOrder="0" diffgr:hasChanges="inserted">
        <ID>test</ID>
      </MyTable1>
    </MyDS>
  </diffgr:diffgram>
</DataSet>
--------------------------------------------------------------------------

Desired xml response:
--------------------------------------------------------------------------
<?xml version="1.0" encoding="utf-8"?>
<DataSet xmlns="http://tempuri.org/">
  <xs:schema id="MyDS" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
     .........................
     .........................
  </xs:schema>
  <diffgr:diffgram xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
    <MyDS xmlns="">
      <MyTable1 diffgr:id="MyTable11" msdata:rowOrder="0" diffgr:hasChanges="inserted" customAttribute="content">
        <ID attribute1="Content" attribute2="etc.">test</ID>
      </MyTable1>
    </MyDS>
  </diffgr:diffgram>
</DataSet>

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Asked On
2005-08-05 at 04:49:58ID21516792
Tags

dataset

,

diffgr

,

table

Topics

C# Programming Language

,

Extensible HTML (XHTML)

Participating Experts
1
Points
500
Comments
5

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Answers

 

by: steelheart38Posted on 2005-08-26 at 06:24:24ID: 14760619

can you try this -->

myTable.ExtendedProperties.Add("TimeStamp", DateTime.Now);
myTable.ExtendedProperties.Add("CustomAttribute", "CustomAttributeValue");

hope it works

 

by: soteaPosted on 2005-08-26 at 06:32:35ID: 14760682

Hmm... can't make it work...

I'm also in doubt where to put the code

I'm typing the dataset manually and using a datareader to fill it.

 

by: steelheart38Posted on 2005-08-26 at 06:38:54ID: 14760744

just tested it and it works

------------------------------------------------------
[WebMethod]
public DataSet MyDataSet()    
{
    DataSet ds = new DataSet("MyDS");
               
    DataTable dt = new DataTable("MyTable1");

    dt.ExtendedProperties.Add("TimeStamp", DateTime.Now);
    dt.ExtendedProperties.Add("CustomAttributeName", "CustomAttributeValue");

    DataColumn dc= new DataColumn("ID");
    dc.ExtendedProperties.Add("columnAttr","columnAttrValue" );

    dt.Columns.Add(dc);
    ds.Tables.Add(dt);

    DataRow datarow = ds.Tables["MyTable1"].NewRow();
    datarow["ID"] = "Test";
    ds.Tables["MyTable1"].Rows.Add(datarow);

    return ds;
}

// -- one more thing, it would help you a lot if you give your variables more readable name like myDataSet instead of
// -- ds,dt,dc,etc... of course thats only about prefence, but take my word, its very helpful =)

 

by: steelheart38Posted on 2005-08-26 at 14:48:42ID: 14765439

i saw an error on the code i gave

it writes the attributes on the schema node.. not on the data nodes itself

il see what else can be done

 

by: steelheart38Posted on 2005-08-26 at 15:55:37ID: 14765907

// -- create a column and set it as attribute

DataColumn myColumn = new DataColumn("AttributeColumn");
myColumn.ColumnMapping = MappingType.Attribute;
<Your DataTable>.Add(myColumn)

// -- create a DataRow and set its myColumn("AttributeColumn") field to a value
DataRow datarow = ds.Tables["MyTable1"].NewRow();
datarow["AttributeColumn"] = "AttributeRow";
ds.Tables["MyTable1"].Rows.Add(datarow);

// --  it will add an attribute to your MyTable1 node -- >> AttributeColumn="AttributeRow"

// -- btw, i've also noticed that creating a new row see below
// -- this creates a new MyTable1 Node instead of just adding an ID node to the existing MyTable1 Node
// -- adding a new row to the same table but when it is converted to XML, a new MyTable1 Node is created
// -- im not sure if you've noticed it already

DataRow datarow2 = ds.Tables["MyTable1"].NewRow();
datarow2["ID"] = "Test2";
ds.Tables["MyTable1"].Rows.Add(datarow2);

20120131-EE-VQP-002

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