GetDataTableRow — read a row from a DataTable by RowName

Exec outputs: 'Row Found' and 'Row Not Found'. OutRow type depends on the DataTable's row struct. RowName must match the row name in the DataTable asset exactly.

GetDataTableRow asks for a row that doesn't exist

Why: Your code looks up '{row}' in a DataTable, but no row with that name is present in the DataTable asset. Fix: Open the DataTable asset in Content Browser. Check the row names in the Row Editor panel. Either: (a) add the missing '{row}' row manually, or (b) update the lookup to use an existing row name, or (c) wire a Get All Row Names → ForEachLoop instead of hardcoding the name.

DataTable driven item database: read stats from table

SETUP: 1. Create struct FItemData: {Name(Name), Damage(float), Icon(Texture2D), Description(Text)}. 2. Create DataTable with row type FItemData. Add rows (Sword, Bow, Staff...). READ: GetDataTableRow(Table=DT_Items, RowName='Sword') → Row Found exec → BreakFItemData(OutRow) → use Damage, Name, etc. DYNAMIC READ (from variable): SetVariable(CurrentItemName='Bow') → GetDataTableRow(RowName=CurrentItemName) → same flow. LIST ALL: GetDataTableRowNames → ForEachLoop → GetDataTableRow per name → display. Key: GetDataTableRow exec outs are 'Row Found' and 'Row Not Found' (NOT 'then').

DataTable

A spreadsheet-like asset holding rows of a struct type. Great for item catalogs, dialogue lines, level configs.

GetDataTableRowNames — get array of all row names in a DataTable

Event Dispatcher: create, bind, and call with custom data

SETUP: In your BP, create an Event Dispatcher (e.g. 'OnPlayerDied') in the My Blueprint panel. BIND (in another BP): Get reference to actor → Bind Event to OnPlayerDied → connect a Custom Event as the target. CALL (in owning BP): Call OnPlayerDied (appears as a pink node) → this broadcasts to all bound listeners. Key: Event Dispatchers are called with 'Call <DispatcherName>' (not 'Broadcast'). Binding is done via 'Bind Event to <DispatcherName>' which has an 'Event' exec-like pin.

string

string

Array: build dynamic list, iterate, find and remove items

ADD: Array Add (Target Array=MyArray, New Item=newElement). READ: Array Get (Target Array=MyArray, Index=i) → use 'Item' output. FIND: Array Contains (returns bool) or Array Find (returns index, -1 if not found). REMOVE by index: Array Remove (Target Array=MyArray, Index=i). REMOVE by value: Array Remove Item (Target Array=MyArray, Item=value). ITERATE: ForEachLoop(Array=MyArray) → 'Array Element' output is the current item. LENGTH: Array Length (returns int). Key: Array nodes operate on the array BY REFERENCE — always connect the array variable directly.

CreateDynamicMaterialInstance — create a runtime-editable material copy

Must call this before SetScalarParameterValue/SetVectorParameterValue. Store the result in a variable for reuse.

Widget data binding: update UI automatically when variable changes

METHOD 1 - Function Binding (auto-updates every frame, easy but has perf cost): In Widget BP: select TextBlock → Details → Content → Text → click 'Bind' → Create Binding → connect your data (e.g. GetPlayerHealth as Text). METHOD 2 - Event-driven (recommended, update only when needed): In owning actor: when data changes → CastTo<WBP_HUD>(HUDWidget) → call custom function 'UpdateHealth(NewHealth)' on widget. In Widget BP: UpdateHealth function → SetText(HealthText, Conv_FloatToString(NewHealth)). KEY: Function bindings run every frame. For frequently-changing data (Tick-speed), use Event-driven approach instead to avoid perf issues.