Datatable 读取行数据

• 继承自 FTableRowBase

  USTRUCT(BlueprintType)
  struct  FSimpleStruct :public FTableRowBase
  {
      GENERATED_USTRUCT_BODY()
  public:
  UPROPERTY(EditAnywhere)
      FString name;
  
  UPROPERTY(EditAnywhere)
      int32 health;
  
  UPROPERTY(EditAnywhere)
      UTexture2D* icon;
  };

• 选择 FSimpleStruct 结构体

• FindRow

  UserInfoDataTable = LoadObject<UDataTable>(this, TEXT("DataTable'/Game/CPPFunction/DataDrive/DT_UserInfo.DT_UserInfo'"));
  if (UserInfoDataTable)
  {
      for (FName RowName : UserInfoDataTable->GetRowNames())
      {
          FSimpleStruct* UserInfo = UserInfoDataTable->FindRow<FSimpleStruct>(RowName, TEXT("name"));
          if (UserInfo)
          {
              UKismetSystemLibrary::PrintString(GetWorld(), UserInfo->name);
          }
      }
  }
  else
  {
      UKismetSystemLibrary::PrintString(GetWorld(), TEXT(" Not Find DataTable!"));
  }

• GetRowMap

  UserInfoDataTable = LoadObject<UDataTable>(this, TEXT("DataTable'/Game/CPPFunction/DataDrive/DT_UserInfo.DT_UserInfo'"));
  if (UserInfoDataTable)
  {
      for (auto it : UserInfoDataTable->GetRowMap())
      {
          FString RowName = (it.Key).ToString();
      FSimpleStruct* UserInfo = (FSimpleStruct*)it.Value;
  
      UKismetSystemLibrary::PrintString(GetWorld(), FString::Printf(TEXT("%s %s"), *RowName, *UserInfo-&gt;name));
  }
  }

Datatable 写入行数据

• AddRow

  UserInfoDataTable = LoadObject<UDataTable>(this, TEXT("DataTable'/Game/CPPFunction/DataDrive/DT_UserInfo.DT_UserInfo'"));
  if (UserInfoDataTable)
  {
      FSimpleStruct* UserInfo = new FSimpleStruct();
      UserInfo->name = TEXT("Lily");
      UserInfo->health = 80;
      FName RowName = TEXT("Player3");
      UserInfoDataTable->AddRow(RowName, *UserInfo);
  }

导入CSV

• csv 文件

  ---,name,health,icon
  Player4,"马克","200","Texture2D'/Game/FourEvilDragonsHP/Textures/DragonTheUsurper/BlueHPTex.BlueHPTex'"
  Player5,"冉冰","90","Texture2D'/Game/FourEvilDragonsHP/Textures/DragonTheSoulEater/BlueHPTex.BlueHPTex'"
  Player6,"墨城","150","None"

• 填充现有的 DataTable

  UserInfoDataTable = LoadObject<UDataTable>(this, TEXT("DataTable'/Game/CPPFunction/DataDrive/DT_UserInfo.DT_UserInfo'"));
  if (UserInfoDataTable)
  {
      FString CSVPath = FPaths::ProjectDir() + TEXT("DataDrive/UserInfo.csv");
      CSVPath = FPaths::ConvertRelativePathToFull(CSVPath);
      if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*CSVPath))
      {
          UDataTableFunctionLibrary::FillDataTableFromCSVFile(UserInfoDataTable, CSVPath);
      }
  }

• 生成 UDataTable

  UDataTable* ADataDriveActor::CreateDataTableFromCSV()
  {
      FString CSVPath = FPaths::ProjectDir() + TEXT("DataDrive/UserInfo.csv");
      CSVPath = FPaths::ConvertRelativePathToFull(CSVPath);
      if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*CSVPath))
      {
          UKismetSystemLibrary::PrintString(GetWorld(), *CSVPath);
          FString CSVData;
          FFileHelper::LoadFileToString(CSVData, *CSVPath);
          UDataTable* DT_UserInfo = NewObject<UDataTable>(GetTransientPackage(), FName(TEXT("DT_UserInfo2")));
          DT_UserInfo->RowStruct = FSimpleStruct::StaticStruct();
          DT_UserInfo->CreateTableFromCSVString(CSVData);
      return DT_UserInfo;
  }
  return nullptr;
  }

导出 CSV

• GetTableAsCSV

  UserInfoDataTable = LoadObject<UDataTable>(this, TEXT("DataTable'/Game/CPPFunction/DataDrive/DT_UserInfo.DT_UserInfo'"));
  if (UserInfoDataTable)
  {
      FString CSVString = UserInfoDataTable->GetTableAsCSV();
      FString CSVPath = FPaths::ProjectDir() + TEXT("DataDrive/UserInfo2.csv");
      FFileHelper::SaveStringToFile(CSVString, *CSVPath, FFileHelper::EEncodingOptions::ForceUTF8);
  }

导入导出Json

省略