dateField

  a!gridLayout(
                      labelPosition: "ABOVE",

                      headerCells: {
                        a!gridLayoutHeaderCell(label: "Reference Number"),
                        a!gridLayoutHeaderCell(label: "SiteID"),
                         
                        a!gridLayoutHeaderCell(label: "Activity"), 
                        a!gridLayoutHeaderCell(label: "Structure Type"), 
                        

                        a!flatten(a!forEach(
                          items: local!TaskParagraphCDT.TaskName,
                          expression:   
                          {
                            /*a!gridLayoutHeaderCell(label: fv!item & " Status"),*/
                            a!gridLayoutHeaderCell(label: fv!item),
                           
                          } 
                        )),
                        a!gridLayoutHeaderCell(label: "Rule"),
                      },
                      columnConfigs: {                            
                        /*a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),*/
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                      

                        a!forEach(
                          items: local!taskIds,
                          expression: {
                            a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1)
                          }
                          /*a!gridLayoutHeaderCell(label: fv!item & " End Date")*/


                        )
                      },
                      rows: 
                      a!forEach(
                        items: local!selectedActivity,
                        expression: with(
                          local!item:fv!item,
                          a!gridRowLayout(
                            contents: {
                              a!textField(
                                value: fv!item.referenceNumber,
                                saveInto: fv!item.referenceNumber,
                                readOnly: true
                              ),
                              a!textField(
                                value: fv!item.siteID ,
                                saveInto:fv!item.siteID,
                                readOnly: true
                              ),
                             
                              a!textField(
                                value: fv!item.activityName,
                                saveInto:fv!item.activityName,
                                readOnly: true
                              ),
                              a!textField(
                                value: fv!item.structureType,
                                saveInto:fv!item.structureType,
                                readOnly: true
                              ),

                              { 
                                a!forEach( 
                                  items: local!TaskParagraphCDT.TaskID,
                                  expression:{
                                    /*a!textField(                                         */
                                      /*value:local!TaskParagraphCDT[fv!index].Status[wherecontains(tostring(local!item.referenceNumber),touniformstring(ri!ForecastDataValue.referenceNumber))],*/
                                      /*readOnly: true*/
                                    /*),*/
                                    a!textField(
                                      value: local!TaskParagraphCDT[fv!index].EndDate[wherecontains(tostring(local!item.referenceNumber),touniformstring(local!selectedActivity.referenceNumber))],
                                      readOnly: true,                                
                                    ),
                                    /*a!dateField(*/
                                      /*value:  */
                                      /*local!TaskParagraphCDT[fv!index].EndDate[wherecontains(tostring(local!item.referenceNumber),touniformstring(local!selectedActivity.referenceNumber))],*/
                                      /*readOnly: true,*/
                                    /*)*/
                                  }
                                )
                              },
                              a!textField(
                                value:{},
                                saveInto:{},
                                readOnly: true
                              ),

                            }
                          ) 

                        )
                      ),

                      height:"TALL",
                      spacing: "STANDARD",
                      rowHeader: 1
                    )

Hi All i have upload my code for grid layout.

In which i am stuck at point, requirement is,  if you see the code you will find that we have one gridlayout where we are showing  data , in the last a!forEach(
items: local!TaskParagraphCDT.TaskID,
expression:{}) i have one field which is text field where i am getting fv!item data which is fine, and all columns of that data is holding date values so now i have requirement on that particular  in fv!item there are seven task data, one for task which PM GO Design , wo i have to make this task column field editable and on the behalf of this particular date value other task date will be auto ajust like if 

pm go design task enddate is today so the next Material Required task date will be +15 days....next Construction Start date will the material required task date +21 days then etc.....

i have to make the grid like below.

here are data structure values.