How to bind the gridview using linq query

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Hi,

I want to select the particular rows from a datatable by using the linq query with some where condition and then I want to bind the selected values into that grid. Can any one help me to solve this problem. Here is my code

C#

DataTable dtDocuments =GetDocuments();
string DocumentList = getDocumentList(KeyId); 
string[] DocList = DocumentList.Split(',');
foreach (string list in DocList)
{
var resultRow = (from Data in (dtDocuments.AsEnumerable())
where Data.Field<string>("DocumentId") ==list.ToString()
select Data);
}
grdPt02Documents.DataSource = resultRow ;  // It showing the error as resultrow is not found
grdPt02Documents.DataBind();

Thanks in Advance

Posted 11-May-12 14:19pm

Member 7946563

Updated 11-May-12 15:59pm

Wes Aday

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VJ Reddy 12-May-12 7:00am

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VJ Reddy · Accepted Answer · 2012-05-11T17:53:00

The reason is that in the statement

C#

grdPt02Documents.DataSource = resultRow ;

the resultRow is out of scope as it is declared within the scope of foreach loop.
Further, the statement

XML

foreach (string list in DocList)
{
var resultRow = (from Data in (dtDocuments.AsEnumerable())
where Data.Field<string>("DocumentId") ==list.ToString()
select Data);
}

will give the rows corresponding to the last string in DocList as it will replace any resultRow found earlier.
The list is already a string and list.ToString() is redundant.
I think the following code can be used for the purpose stated in the question

C#

string[] docIds = DocumentList.Split(',');
var resultTable = (dtDocuments.AsEnumerable().Where (d => docIds
        		.Any (i => d.Field<string>("DocumentId")
        		.Equals(i.Trim(), StringComparison.InvariantCulture)))
        		.Select (d =>d )).CopyToDataTable();