query on datagrid

Hi

I want to query a datagrid on the page. possibly using Linq.

My purpose is to extract data of a column into an IList:-
currently doing like:-
for each(raddatagriditem item in radgrid.items)
{
lst.add(item["uniquecolumnname"].text);
}

but Due to performance concerns, I want to use Linq directly to populate "uniquecolumnname" string  values to another Ilist<string>.

please suggest how to query a datagrid item collection directly.

Cheers-Hemant
+919555798309
email removed

 

Reply 1

Hi hemantrhtk,

Do you mean get all the values of “uniquecolumnname” from DataGridView (You have said Linq, so it might be DataGridView not DataGrid, right?)?

If my understanding is correct, you can use this code to get value
foreach (DataGridViewRow dgvRow in myDataGridView1.Rows)
{
lst.Add(dgvRow.Cells["uniquecolumnname"].Value);
}
If I misunderstood you, please feel free to tell me.

Sincerely,
Kira Qian

Reply 2

Hi,
You can also use DataTable.Select(filterExpression) instead.

---

With best regards, Yasser Zamani

SpSiteDataQuery with more than 256 conditions.

Hi

I am getting error :-
Incorrect syntax near 'UserData'.
System.Data.SqlClient.SqlException: Too many table names in the query. The maximum allowable is 256.

if I use spsitedataquery with more than 256 conditions.

at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior) at Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command, CommandBehavior behavior) at Microsoft.SharePoint.SPSqlClient.ExecuteQuery(Boolean& bSucceed) at Microsoft.SharePoint.Library.SPRequestInternalClass.CrossListQuery(String bstrUrl, String bstrXmlWebs, String bstrXmlLists, String bstrXmlQuery, ISP2DSafeArrayWriter pCallback, Object& pvarColumns) at Microsoft.SharePoint.Library.SPRequest.CrossListQuery(String bstrUrl, String bstrXmlWebs, String bstrXmlLists, String bstrXmlQuery, ISP2DSafeArrayWriter pCallback, Object& pvarColumns) at Microsoft.SharePoint.SPWeb.GetSiteData(SPSiteDataQuery query) at.......


Did anybody faced this issue before ?


Cheers-Hemant
EMAIL REMOVED

 

Reply 1

Can you include the CAML query you are trying to run, any view field set and background on what you are trying to achieve?

---

My SharePoint Blog - http://www.davehunter.co.uk/blog

Reply 2

is it something to do with length of the caml query possibly?

Reply 3

The Query property of the SPSiteDataQuery is a string.  I don't believe the CAML Query has a max length.

---

My SharePoint Blog - http://www.davehunter.co.uk/blog

detect if new spfile is uploaded

Hi

Is there a way to detect if
a new spfile is uploaded in document library/ old spfile is replaced for the same item
or
only the meta data have been edited. (may be in itemupdated eventhandler.)

---

Thanks & Regards
Hemant Kumar
EMAIL REMOVED

Reply 1

When a file is replaced, the ItemUpdated event is triggered.  The same is true if you just change the metadata for the file.  Not sure if it's relevant to you, but replacing an existing file does not call ItemDeleted and ItemAdded.  In other words, it's not a delete and add operation.

---

Randy - http://sharepointhawaii.com/randywilliams

Reply 2

Hi,

Yes, as Williams’s information, both file replacing action and metadata updating action trigger ItemUpdated event.

And perhaps you need to distinguish them by BeforeProperties and AfterProperties.

Here is a  Williams article for detailed information when retrieving event’s  before and after value.

Hope this can help.

 

Best Regards,

-Aaron

Reply 3

Hi,

@hemantrhtk :) Please look at this link :http://www.synergyonline.com/blog/blog-moss/Lists/Posts/Post.aspx?ID=25
A great artcile for eventhandler.

Best Regards,

-Aaron

Reply 4

Hello Aron

Could you suggest , possibly what is is the column /property name which changes while new doc is uploaded/previous doc is overridden.

I tried the same thing before starting this thread with all the properties in loop , but could not figure out the possible column/property name.

Cheers-Hemant

SyncFusion with SharePoint

Below mentioned doc gives a good example to use syncfusion asp.net controls :

http://files.syncfusion.com/samples/Tools.Web/Tools_Web_SimpleWebPart.zip

http://files.syncfusion.com/samples/Tools.Web/SharePointServer.zip

 

 

How far I should go with customization ........

Almost every SharePoint project starts with elaborating  what the current version of SharePoint supports as Out of Box  feature .

But at the end of the day , level of customization we require in these OOB feature is huge.

To make it easy for future upgrades and better performance and really really get what Microsoft promise , we should be inclined towards no  customization.

What's the difference between Abstract classes and Interfaces?

Features                                      Interfaces                                abstract class

Multiple inheritance	A class may inherit several interfaces.	A class may inherit only one abstract class.
Default implementation	An interface cannot provide any code, just the signature.	An abstract class can provide complete, default code and/or just the details that have to be overridden.
Access Modfiers	An interface cannot have access modifiers for the subs, functions, properties etc everything is assumed as public	An abstract class can contain access modifiers for the subs, functions, properties
Core VS Peripheral	Interfaces are used to define the peripheral abilities of a class. In other words both Human and Vehicle can inherit from a IMovable interface.	An abstract class defines the core identity of a class and there it is used for objects of the same type.
Homogeneity	If various implementations only share method signatures then it is better to use Interfaces.	If various implementations are of the same kind and use common behaviour or status then abstract class is better to use.
Speed	Requires more time to find the actual method in the corresponding classes.	Fast