reading xml from database..

[prashant]

Hi all,
i am working with .net 2.0 and sql server managment studio of
version--9.00.1399.00

for getting a xmldocument from a xml data in sqlserver ..

their is no error in this program but xmlreader returned by
line-->
"XmlReader xmlUser = xmlMain.CreateReader();

shows that xmlUser.HasValue is false but the "xmlMain" has the Xml
document...and the end result i am getting is null in XmlDocumnet named
userdoc....and thats not our requirment

the function is following:--

public static XmlDocument GetXmlDocument(string coloumName,
SqlDataReader sqlReader)
{
int ordinal = sqlReader.GetOrdinal(coloumName);
XmlDocument userDoc = new XmlDocument();
if (ordinal > 0)
{
SqlXml xmlMain = sqlReader.GetSqlXml(ordinal);

if (!xmlMain.IsNull)
{
XmlReader xmlUser = xmlMain.CreateReader();
if (xmlUser.HasValue)
{
userDoc.Load(xmlUser);
}
}
return userDoc;


Thanx in advance........

 

[Guest]

Hi all,
i am working with .net 2.0 and sql server managment studio of
version--9.00.1399.00

for getting a xmldocument from a xml data in sqlserver ..

their is no error in this program but xmlreader returned by
line-->
"XmlReader xmlUser = xmlMain.CreateReader();

shows that xmlUser.HasValue is false but the "xmlMain" has the Xml
document...and the end result i am getting is null in XmlDocumnet named
userdoc....and thats not our requirment

the function is following:--

public static XmlDocument GetXmlDocument(string coloumName,
SqlDataReader sqlReader)
{
int ordinal = sqlReader.GetOrdinal(coloumName);
XmlDocument userDoc = new XmlDocument();
if (ordinal > 0)
{
SqlXml xmlMain = sqlReader.GetSqlXml(ordinal);

if (!xmlMain.IsNull)
{
XmlReader xmlUser = xmlMain.CreateReader();
if (xmlUser.HasValue)
{
userDoc.Load(xmlUser);
}
}
return userDoc;

Thanx in advance........

HasValue returns a true if the node on which the reader is currently
positioned has a value. You suppose you wanted to read the first node

XmlReader xmlUser = xmlMain.CreateReader();
if (xmlUser.Read)
{
userDoc.Load(xmlUser);
}

 

[Guest]

HasValue returns a true if the node on which the reader is currently
positioned has a value. You suppose you wanted to read the first node

XmlReader xmlUser = xmlMain.CreateReader();
if (xmlUser.Read)
{
userDoc.Load(xmlUser);

must be if (xmlUser.Read())

 

[Steven Cheng[MSFT]]

Hi

As Alexey has suggested, after you create the XmlReader from SqlXml
instance, you can call its "Read()" method to read into the underlying XML
stream. Also, you need to first call "Read" method on the SqlDataReader you
get so as to move to the first returned record:

e.g.

================
using (SqlCommand command =
connection.CreateCommand())
{
command.CommandType = CommandType.Text;
command.CommandText = sql;
command.Parameters.AddRange(sqlParams);

connection.Open();

using (SqlDataReader dr =
command.ExecuteReader())
{
if (dr.Read())
document.Load(
dr.GetSqlXml(0).CreateReader());
}

connection.Close();
}

===========================

Here are some web articles discussing on this:

#XML Data Type Support in ADO.NET 2.0: Handling XML from SQL Server 2005
http://msdn2.microsoft.com/en-us/library/ms971534.aspx

#XML Data type in ADO.Net v2.0 - Part II
http://blogs.msdn.com/sushilc/rss_tag_SQL+Server_2700_s+Xml+DataType+w_2F00_
ADO.Net+2.0.xml

#Work with XML Data Type in SQL Server 2005 from ADO.NET 2.0
http://www.developer.com/net/net/article.php/11087_3406251_3

Hope this helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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[Steven Cheng[MSFT]]

Hi prashant,

How are you doing on this issue, have you got any progress? If there is
still anything we can help, please feel free to post here.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead


This posting is provided "AS IS" with no warranties, and confers no rights.