Convert Dataset table to a List.

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Hello,

Trying to convert an Dataset table to a List.

Cannot Resolve Symbol 'AsEnumerable'

Thanks!!

[Edit - the code]

C#

private void LoadAppointments()
        {
            var conn = new SqlConnection(ConnectionString);
            var adapter = new SqlDataAdapter("LoadAppointment", conn);
            var ds = new DataSet();
            adapter.Fill(ds);
            DataTable dataTable = ds.Tables[0];
            
            var myData = ds.Tables[0].AsEnumerable().Select(r => new
            {
                column1 = r.Field("column1"),
                column2 = r.Field("column2"),
                column3 = r.Field<decimal?>("column3")
            });
            var list = myData.ToList();
        }

Posted 4-Mar-13 1:06am

ArunAmalraj

Updated 4-Mar-13 2:00am

CHill60

v2

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Comments

CHill60 4-Mar-13 7:13am

Use the Improve question link to post the code that is producing the error

ArunAmalraj 4-Mar-13 7:19am

private void LoadAppointments()
{
var conn = new SqlConnection(ConnectionString);
var adapter = new SqlDataAdapter("LoadAppointment", conn);
var ds = new DataSet();
adapter.Fill(ds);
DataTable dataTable = ds.Tables[0];

var myData = ds.Tables[0].AsEnumerable().Select(r => new
{
column1 = r.Field<string>("column1"),
column2 = r.Field<int>("column2"),
column3 = r.Field<decimal?>("column3")
});
var list = myData.ToList();
}

3 solutions

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**Orcun Iyigun** · Answer 1 · 2013-03-04T01:14:00

Solution 1

Quote:

You can't query against the DataTable's Rows collection, since DataRowCollection doesn't implement IEnumerable<t>. You need to use the AsEnumerable() extension for DataTable

Please check the following links for solution:
Link 1[^]
Lİnk 2[^]

God luck,
OI

Posted 4-Mar-13 1:14am

Orcun Iyigun

Shahare · Answer 2 · 2013-03-04T01:25:00

Solution 2

You need to address per row - do something like this:

XML

foreach (DataRow row in ds.Tables[0].Rows)
{
    IEnumerable<object> asEnumerable = row.ItemArray.AsEnumerable();
}

Posted 4-Mar-13 1:25am

Shahare

ArunAmalraj · Answer 3 · 2013-03-04T01:31:00

Solution 3

Added Reference

System.Data.DataExtensions;

Posted 4-Mar-13 1:31am

ArunAmalraj