There is already an open DataReader associated with this Command which must be closed first

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C#

public static DataTable SqlDataAdapter(string sqlStr)
    {
        DataTable dt = new DataTable();

        try
        {
           
            SqlDataAdapter da = new SqlDataAdapter(sqlStr, con);
            da.Fill(dt);
        }
        catch (SqlException ex)
        {
            throw ex;
        }
        return dt;
    }

My above function gives following error .....

There is already an open DataReader associated with this Command which must be closed first????
Please help ???

Posted 4-Dec-13 20:57pm

Rohit kumar6210

Updated 4-Dec-13 20:59pm

Thanks7872

v2

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Thanks7872 · Answer 1 · 2013-12-04T21:02:00

Error is clear enough. You can not execute any command on the connection which is in use by SqlDataReader,that is SqlDataReader is using your connection. It has to be closed explicitly as its not of disconnected architecture.

So,close the SqlDataReader from where you are calling this method.

Aravindba · Answer 2 · 2013-12-04T21:56:00

Solution 2

Hai

U receive a error like "already open dataReader" for best coding use close and dispose .
After use connection string must be close,like con.close() and for dataadapter or datareader must dispose like da.dispose(),dt.dispose() method.

Regards
AravindB

Posted 4-Dec-13 21:56pm

Aravindba

Updated 4-Dec-13 21:57pm

v2