import text file data into sql database table

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C#

The problem with my code is that
it is running without any error in VisualStudio but values of text file are not import into sql database table...
here is my code attached

private void StartImport()
    {
        SqlBulkCopy bulkCopy = new SqlBulkCopy("Server=TCCLPC47;Database=aa;Trusted_Connection=True;", SqlBulkCopyOptions.TableLock);
        bulkCopy.DestinationTableName = "dbo.b";
        bulkCopy.WriteToServer(CreateDataTableFromFile());
    }
    private DataTable CreateDataTableFromFile()
        {
            DataTable dt = new DataTable();
            DataColumn dc;
            DataRow dr;
            dc = new DataColumn();
            dc.DataType = System.Type.GetType("System.int");
            dc.ColumnName = "c1";
            dc.Unique = false;
            dt.Columns.Add(dc);
            dc = new DataColumn();
            dc.DataType = System.Type.GetType("System.int");
            dc.ColumnName = "c2";
            dc.Unique = false;
            dt.Columns.Add(dc);
            dc = new DataColumn();
            dc.DataType = System.Type.GetType("System.int");
            dc.ColumnName = "c3";
            dc.Unique = false;
            dt.Columns.Add(dc);
            dc = new DataColumn();
            dc.DataType = System.Type.GetType("System.int");
            dc.ColumnName = "c4";
            dc.Unique = false;
            dt.Columns.Add(dc);
            FileStream fileStream = new FileStream(@"d:\A.txt", FileMode.Open);
            StreamReader sr = new StreamReader(@"d:\\A.txt");
            string input;
          while ((input = sr.ReadLine()) !=null)
            {
                string[] s = input.Split(new char[] { ',' });
            
                dr = dt.NewRow();
                dr["c1"] = s[0];
                dr["c2"] = s[1];
                dr["c3"] = s[2];
                dr["c4"] = s[3];
                dt.Rows.Add(dr);
                
            }
            sr.Close();
            return dt;
        }
    }

please help..
confused geminien..