How to Programmatically Filter Ag-Grid Columns in Angular

You can easily control the column filtering in ag-Grid by using the getFilterInstance and setModel methods associated to the column you need filtering. Once done, remember to call onFilterChanged to apply your changes.

// a list of all your items you want to filter
// make sure to create a list of strings
// a list of numbers won't work
const listOfItems = => row.ComeColumnItem.toString())

// get the filter instance per column
const filterInstance = this.gridApi?.getFilterInstance('YourColumnName')

// get the existing model in-case you want to modify it
const model = this.gridApi?.getModel()

// or set a new one
  type: 'set',
  values: listOfItems

// remember to apply the changes when done!