ITsModelParams.Add

Syntax

Description

The Add method adds a parameter to the collection.

Comments

To remove a specific parameter from the collection, use the ITsModelParams.Remove and ITsModelParams.RemoveByKey methods; to remove all parameters, use the ITsModelParams.Clear method.

Example

Executing the example requires that the repository contains a modeling container with the MODEL_SPACE identifier. The modeling container must include a metamodel with the METAMODEL identifier calculated by the problem with the PROBLEM identifier. The metamodel calculation chain must include a model of determinate equation with the MODEL identifier.

Add links to the Dal, Metabase, Ms, Transform system assemblies.

Sub ModelParams;
Var
    mb: IMetabase;
    Ms: IMetabaseObjectDescriptor;
    Problem: IMsProblem;
    MetaModel: IMsMetaModel;
    Model: IMsModel;
    MMParams: ITsModelParams;
    TsParam: ITsModelParam;
    CalcSett: IMsProblemCalculationSettings;
    Calc: IMsProblemCalculation;
    Method: IMsDeterministicTransform;
    ParamsVals: ITsModelParamValues;
Begin
    mb := MetabaseClass.Active;
    // Get modeling container
    Ms := mb.ItemById("MODEL_SPACE");
    // Get metamodel
    MetaModel := mb.ItemByIdNamespace("METAMODEL", Ms.Key).Edit As IMsMetaModel;
    // Set metamodel parameters
    MMParams := MetaModel.Params As ITsModelParams;
    MMParams.Clear;
    // Add the parameter that determines lower limit of values
    TsParam := MMParams.Add;
    TsParam.Name := "MIN_VALUE";
    TsParam.Id := "MIN_VALUE";
    TsParam.Tag := "No default value ";
    TsParam.Hidden := True;
    TsParam.DataType := DbDataType.Integer;
    TsParam.ParamType := TsParamType.Simple;
    // Add the parameter that determines upper limit of values
    TsParam := MMParams.Add As ITsModelParam;
    TsParam.Name := "MAX_VALUE";
    TsParam.Id := "MAX_VALUE";
    TsParam.Tag := "No default value ";
    TsParam.Hidden := True;
    TsParam.DataType := DbDataType.Integer;
    TsParam.ParamType := TsParamType.Simple;
    // Save changes made in the metamodel
    (MetaModel As IMetabaseObject).Save;
    // Get the model
    Model := mb.ItemByIdNamespace("MODEL", Ms.Key).Edit As IMsModel;
    Method := Model.Transform.FormulaItem(0).Method As IMsDeterministicTransform;
    // Set expression for model calculation based on parameter values
    Method.Expression.AsString := "Randbetween({MIN_VALUE}, {MAX_VALUE})";
    // Save changes made in the model
    (Model As IMetabaseObject).Save;
    // Get modeling problem
    Problem := mb.ItemByIdNamespace("PROBLEM", Ms.Key).Edit As IMsProblem;
    // Set parameters of model calculation
    CalcSett := Problem.CreateCalculationSettings;
    // Set parameter values
    ParamsVals := CalcSett.ParamValues As ITsModelParamValues;
    ParamsVals.FindById("MIN_VALUE").Value := -100;
    ParamsVals.FindById("MAX_VALUE").Value := 100;
    CalcSett.FactIncluded := True;
    // Calculate
    Calc := Problem.Calculate(CalcSett);
    Calc.Run;
End Sub ModelParams;

After executing the example two parameters are created in the METAMODEL metamodel. A formula for calculation of the MODEL model is set using these parameters. Then metamodel chain is calculated. Before calculation parameter values are set.