修改数据行数为0时允许导出EXCEL

codegit/CallCenterCommon/CallCenter.Utility/NPOI/NPOIHelper.cs

         {
             try
             {
-                if (dt.Rows.Count > 0)
-                {
+                //if (dt.Rows.Count > 0)
+                //{
                     HSSFWorkbook workbook = new HSSFWorkbook();
                     ISheet sheet = workbook.CreateSheet("Sheet1");
 
 
                         curContext.Response.End();
                     }
-                }
+                //}
                 return "";
             }
             catch
         {
             try
             {
-                if (dt.Rows.Count > 0)
-                {
+                //if (dt.Rows.Count > 0)
+                //{
                     HSSFWorkbook workbook = new HSSFWorkbook();
                     ISheet sheet = workbook.CreateSheet("Sheet1");
 
 
                         curContext.Response.End();
                     }
-                }
+                //}
                 return "";
             }
             catch