一步步使用SAP C4C Cloud Application Studio创建一个BO和对应的屏幕

打开SAP C4C Cloud Application Studio，

进入Solution Explorer，右键菜单里选择Add -> New Item:

新建一个Business Object，取名CarPark:

源代码如下：

import AP.FO.BusinessPartner.Global;

import AP.Common.GDT as apCommonGDT;

 
businessobject CarPark 
  // *Further Development*
    // declare an error message that is called if the BO fails validation
    // raises Message_Car_Park_Full

  
    {
    
    // Root node must not be specified, it is created implicitly
    //

     // Add elements here.

    //

// To declare an element as alternative key, use the [AlternativeKey] 
// annotation.

//Please note:
   // - An alternative key of type UUID exists implicitly for each node, enabling
   //  the node to be used as an association target.

    // - The QueryByElements query is created automatically for each node.

   // Code completion is available with CTRL + SPACE. 
    // *Further Development*
    // define an error message to be displayed if the BO fails validation

   // message Message_Car_Park_Full text "The car park is full - no spaces available"; 

   
    // Car Park ID - (the company may have multiple car parks)
    // - therefore we use this ID to identify the individual car park
    element CarParkID : ID; 

  
    // additional information on the car park
    element CarParkName : LANGUAGEINDEPENDENT_LONG_Text;

    element CarParkDescription : LANGUAGEINDEPENDENT_LONG_Description;

    element Number_of_ParkingSpaces : IntegerValue;

 
    // *Further Development*
    // add an element to display how many parking spaces are available

    // element Number_of_ParkingSpaces_Available : IntegerValue;

    // declare an action to calculate the available car spaces

    // action Update_AvailableParkingSpaces;
    // *Further Development*
    // add an element to record location information

  // this field is used with a URL mashup to display the location of the car park
     // element CarParkLocation : LANGUAGEINDEPENDENT_MEDIUM_Description; 

     // each car park will have multiple parking spaces

    // we create a node with 0 to n parking spaces

 
    node ParkingSpace [0,n]    {
       // each parking space is assigned a unique identifier
       element ParkingSpaceID : ID;
     
      // display the ID of the Employee assigned to the parking space
      element ParkingSpace_AssignedEmployeeID : ID;

      // a parking space may be designated as a "Disabled Friendly" parking space
      element ParkingSpace_Disabled : Indicator;
     
      // is there an electric charging station for this parking space ?
      element ParkingSpace_ElectricChargeStation : Indicator;
    
      // display the license plate number of the employee's car
       element Vehicle_RegistrationNumber : LANGUAGEINDEPENDENT_MEDIUM_Text;
    
     // for a multi-level car park, we have the possibility to specify a level number
      element ParkingSpace_Level : NumberValue;

       // we need to create an association to the SAP BO "Employee"

      // this allows us to include elements from the Employee BO in our screens

      // a parking space may be associated to at most one employee

      association ToEmployee [0,1] to Employee;
      }
}

激活该BO，确保Activation Status为Runtime Objects up to date:

BO激活后，右键菜单选择Create Screens：

选择Screen Scenario with Thing-Based navigation：

会自动生成很多SAP Cloud for Customer 屏幕：

双击QA打开自动生成的UI，发现上面已经有一些来自BO抬头级别的字段了：

点工具栏上这个AddFlexLayoutRow按钮：

出现一个新的空白行：

将Toolbox里的控件AdvancedListPane拖到新建的FlexLayoutRow里：

选中某一个column，右键菜单里添加一个新的column：

现在我们有了一个表格，包含四列：

View菜单里打开：BO Browser / Data Model，使其显示在屏幕右边：

把ParkingSpaceID拖拽到第一列上去：

选择No：

从而建立了UI字段和BO 模型字段的绑定关系：

此处查看绑定关系：

显示employee ID的字段默认是input field，需要将其改成value help：

改成Object Value Selector：OVS

选择/SAP_BYD_APPLICATION_UI/publicovs/employeeid/
EmployeeID: 作为OVS Component：

把字段：ToEmployee.CurrentCommon.Person.Name.GivenName拖到第三列：

familyName拖到第四列：

把GivenName的display type设置为Static Text：

右边properties下拉菜单里，选择AdvancedListPaneVariant: ListPaneVariant：

useToolbar从false改成true：

设置成true之后，多了两个按钮：Add Row和Remove.

选中Add Row按钮，新建一个Event handler：

新建一个operation，类型为List：

Target List里，从下拉菜单选择/Root/DataList：

给Remove按钮也添加一个event handler：

再添加一个save action，确保Row被删除后自动保存：

选中identificationRegion:

点击Advanced：

选择CarParkID：

最终效果：

选中SectionGroup，可以对里面的字段进行位置顺序调整：

最后把用户分配到这个新建好的work center即可：

现在就可以进行测试了：

更多Jerry的原创文章，尽在："汪子熙":