Selection in a grid using select all and deselect All functionality

Question

HI All , 
 I am trying to select the value in a readonly grid by select all and deselect all functionality in a grid . I am not able to achieve this . below is the snippet of my code . please help me out . a!localVariables(
 local!data1: { { name: "Java" }, { name: "Python" } },
 local!selectedRowData,
 local!pageSize: 25,
 local!defaultActivityPaging: a!pagingInfo(
 1,
 local!pageSize,
 a!sortInfo("name", true)
 ),
 local!activityPaging: local!defaultActivityPaging,
 local!gridselectedsNumber,
 local!selection,
 local!isDeselectAllDisabled: or(
 length(local!data1) > 100,
 a!isNullOrEmpty(local!selection)
 ),
 local!isSelectAllDisabled: or(
 length(local!data1) > 100,
 length(local!data1) = 0
 ),
 {
 a!columnsLayout(
 columns: {
 a!columnLayout(
 contents: {
 a!richTextDisplayField(
 value: {
 a!richTextIcon(
 icon: "question-circle",
 caption: "Selection will only apply to filtered records",
 color: "#1D659C"
 ),
 " ",
 a!richTextIcon(
 icon: "square-o",
 caption: if(
 local!isDeselectAllDisabled,
 "No Records selected",
 {}
 ),
 color: if(
 local!isDeselectAllDisabled,
 {},
 "ACCENT"
 )
 ),
 a!richTextItem(
 text: " Deselect All",
 link: if(
 local!isDeselectAllDisabled,
 {},
 a!dynamicLink(
 label: "Deselect All",
 saveInto: {
 a!save(
 local!selection,
 difference(
 touniformstring(local!selection),
 touniformstring(local!data1)
 )
 ),
 
 }
 )
 ),
 linkStyle: "STANDALONE"
 ),
 " | ",
 a!richTextIcon(
 icon: "check-square-o",
 caption: if(
 local!isSelectAllDisabled,
 "Limit filtered list below " & 100 & " records",
 {}
 ),
 linkStyle: "STANDALONE",
 color: if(local!isSelectAllDisabled, {}, "ACCENT")
 ),
 a!richTextItem(
 text: " Select All",
 link: if(
 local!isSelectAllDisabled,
 {},
 a!dynamicLink(
 label: "Select All",
 value: {},
 saveInto: {
 a!save(
 local!selection,
 reject(
 a!isNullOrEmpty(),
 union(
 touniformstring(local!selection),
 touniformstring(local!data1)
 )
 )
 ),
 a!save(
 local!gridselectedsNumber,
 local!selection
 )
 }
 )
 ),
 linkStyle: "STANDALONE"
 )
 },
 align: "RIGHT"
 )
 }
 )
 },
 alignVertical: "BOTTOM"
 ),
 a!gridField(
 labelPosition: "ABOVE",
 data: local!data1,
 columns: {
 a!gridColumn(
 label: "name",
 sortField: "name",
 value: fv!row.name,
 align: "START"
 ),
 
 },
 pagingSaveInto: local!activityPaging,
 selectable: true,
 selectionValue: local!selection,
 selectionSaveInto: {
 local!selection,
 a!save(
 local!selectedRowData,
 append(local!selectedRowData, fv!selectedRows)
 ),
 a!save(
 local!selectedRowData,
 difference(
 local!selectedRowData,
 fv!deselectedRows
 )
 ),
 
 },
 )
 }
) 
 Thanks in advance

Chris · Answer

Gotcha, sorry I missed the selection links on the top right! 
 So the key is that the local!selection value holds the unique key of your selection, in the link you are saving the entire row to the selection. You can see by using the select link with the issue (creates the top values in local!selection), then selecting with the checkbox in the grid (creates the bottom 2 selections): 
 
 Instead, you would save the row IDs into the selection. As a quick example, test after changing your local!selection save on line 88 to: 
 a!save(local!selection,1+enumerate(2))

Selection in a grid using select all and deselect All functionality

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