Sharepoint List Item Version History

if (docListItem != null)

                        {

                            // Create new DataTable.

                            DataTable dtHistory = new DataTable();

                            try

                            {

                                //starts History section

                                // Declare DataColumn and DataRow variables.

                                DataColumn LastModifiedBy;

                                DataColumn LastModifiedOn;

                                DataColumn Comments;

                                DataColumn Version;

                                DataRow row;

                                // Create new DataColumn, set DataType, ColumnName

                                // and add to DataTable.   

                                //column.DataType = System.Type.GetType("System.Int32");

                                LastModifiedBy = new DataColumn();

                                LastModifiedBy.ColumnName = "LastModifiedBy";

                                dtHistory.Columns.Add(LastModifiedBy);

                                LastModifiedOn = new DataColumn();

                                LastModifiedOn.ColumnName = "LastModifiedOn";

                                dtHistory.Columns.Add(LastModifiedOn);

                                Comments = new DataColumn();

                                Comments.ColumnName = "Comments";

                                dtHistory.Columns.Add(Comments);

                                Version = new DataColumn();

                                Version.ColumnName = "Version";

                                dtHistory.Columns.Add(Version);

                                SPFieldUserValue ModifiedBy = new SPFieldUserValue(web, docListItem["Editor"].ToString());

                                row = dtHistory.NewRow();

                                row["LastModifiedBy"] = ModifiedBy.LookupValue;

                                row["LastModifiedOn"] = docListItem["Modified"];

                                if (docListItem["_CheckinComment"] != null) //Check In Comment

                                {

                                    if (docListItem["_CheckinComment"].ToString().Length >= 3)

                                        row["Comments"] = docListItem["_CheckinComment"].ToString().Remove(0, 3);

                                }

                                row["Version"] = docListItem["_UIVersionString"];

                                dtHistory.Rows.Add(row);

// it gets latest record

                                for (int i = 0; i < docListItem.File.Versions.Count; i++)

                                {

                                    row = dtHistory.NewRow();

                                    row["LastModifiedBy"] = docListItem.File.Versions[i].CreatedBy.Name;

                                    row["LastModifiedOn"] = docListItem.File.Versions[i].Created.ToLocalTime().ToString();

                                    row["Comments"] = docListItem.File.Versions[i].CheckInComment;

                                    //Response.Write("2nd loop: " + docListItem.File.Versions[i].CheckInComment);

                                    row["Version"] = docListItem.File.Versions[i].VersionLabel;

                                    dtHistory.Rows.Add(row);

                                }

                                //grdHistory.DataSource = docListItem.Versions;

                                dtHistory.DefaultView.Sort = "Version Desc";

                                grdHistory.DataSource = dtHistory;

                                grdHistory.DataBind();

                            }

                            catch (Exception ex)

                            {

                                Response.Write(ex.Message);

                            }

                            finally

                            {

                                dtHistory.Dispose();

                            }

                            //Activity log section

                            SPAuditQuery wssQuery;

                            SPAuditEntryCollection auditCol;

                            wssQuery = new SPAuditQuery(ElevatedWeb.Site);

                            wssQuery.RestrictToListItem(docListItem = documentListCollection[0]);

                            auditCol = ElevatedWeb.Site.Audit.GetEntries(wssQuery);

                            DataTable dtActivity = new DataTable("ActivityLog");

                            DataColumn colLog = new DataColumn();

                            colLog.ColumnName = "Log";

                            DataRow drow;

                            dtActivity.Columns.Add(colLog);

                            foreach (SPAuditEntry entry in auditCol)

                            {

                                if (entry.Event == SPAuditEventType.CheckOut || entry.Event == SPAuditEventType.CheckIn || entry.Event == SPAuditEventType.FileFragmentWrite)

                                {

                                    drow = dtActivity.NewRow();

                                    // if (ParseVersionNumber(entry.EventData) != "N/A")

                                    // {

                                    drow[0] = entry.Occurred.ToLocalTime() + " : " + entry.Event + " by " + GetUserNameById(entry.UserId, site);

                                    dtActivity.Rows.Add(drow);

                                    //}

                                }

                            }

                            grdActivitylog.DataSource = dtActivity;

                            grdActivitylog.DataBind();

                            dtActivity.Dispose();

                        }

                    }