We have problems using the Combo-Box Control (within a grid) and the use of the string(!) value “undefined”. When selecting the value “undefined” (it is meant to select the text undefined), the combo box control sets the value to null.

We use the following column settings and combo editor options:

{ columnKey: "Risk", editorType: "combo", validation: true, editorOptions: { mode: "editable", editable: true, filteringType: "local", renderMatchItems: "multi", filteringCondition:"contains", readonly: false, allowCustomValue: false, dataSource: ["high", "medium", "low", "undefined"] } },

Please give advice on how to deal with the string value “undefined” in infragistics controls.