fix a bug while export data in the report app.

OTSIncAReportApp/1-UI/Control_Grids/ParticlesGridDevidePage.cs

@@ -1499,6 +1499,7 @@ namespace OTSIncAReportGrids
         /// </summary>
         public void SaveMarkParticleRectangleOnFieldFile(DataTable dataTable ,out List<string> vs , out DataTable dt_FIeld)
         {
+            Init();
             List<string> maxlength = new List<string>();
             for (int i=0;i< dataTable.Rows.Count;i++)
             {