IRdsParamsControl.Expression

Fore Syntax

Expression(Param: IRdsParam): IExpression;

Fore.NET Syntax

Expression[Prognoz.Platform.Interop.Rds.IRdsParam] : Prognoz.Platform.Interop.ForeSystem.IExpression;

Parameters

Param. Parameter of a linked dictionary, for which it is necessary to determine a value.

Description

The Expression property returns an expression that determines a permanent value of a parameter of a linked dictionary.

Fore Example

Executing the example requires the MDM repository with the NSI_1 identifier that contains MDM dictionaries with the Dict_1 and Dict_2 identifiers. The second dictionary has one parameter. Add links to the Metabase, Dal and Rds system assemblies.

Sub Macro;
Var
    MB: IMetabase;
    MObj: IMetabaseObject;
    Dict, Dict2: IRdsDictionary;
    Attrs: IRdsAttributes;
    LinkAttr: IRdsAttribute;
    Link: IRdsLink;
    Param: IRdsParam;
    ParamsControl: IRdsParamsControl;
Begin
    MB := MetabaseClass.Active;
    MObj := MB.ItemByIdNamespace("Dict_1", MB.ItemById("NSI_1").Key).Edit;
    Dict := MObj As IRdsDictionary;
    Dict2 := MB.ItemByIdNamespace("Dict_2", MB.ItemById("NSI_1").Key).Bind As IRdsDictionary;
    //Attributes of the first dictionary
    Attrs := Dict.Attributes;
    //Attribute for linking with the dictionary
    LinkAttr := Attrs.Add;
    LinkAttr.DataType := DbDataType.Integer;
    LinkAttr.Id := "LinkAttr";
    LinkAttr.Name := Link attribute;
    //Link with the parameterized dictionary
    Link:= Dict.Links.Add;
    Link.Attribute := LinkAttr;
    Link.Reference := Dict2.Attributes.Key;
    Link.Id := "Link";
    Link.Name := Link with the dictionary Dict_2;
    //Parameter that needs to be controlled
    ParamsControl := Link.ParamsControl;
    Param := ParamsControl.ReferenceDictionary.Params.Item(0);
    ParamsControl.Expression(Param).AsString := "10";
    MObj.Save;
End Sub Macro;

After executing the example, the attribute used to link with the Dict_2 dictionary is created in the first dictionary. The link between the Dict_1 and Dict_2 dictionaries is established by the Key attribute. A permanent value 10 is set as a parameter value of the linked Dict_2 dictionary.

Fore.NET Example

Imports Prognoz.Platform.Interop.Dal;
Imports Prognoz.Platform.Interop.Rds;

...

Public Shared Sub Macro(Params: StartParams);
Var
    MB: IMetabase;
    MObj: IMetabaseObject;
    Dict, Dict2: IRdsDictionary;
    Attrs: IRdsAttributes;
    LinkAttr, ParamAttr: IRdsAttribute;
    Link: IRdsLink;
    Param: IRdsParam;
    ParamsControl: IRdsParamsControl;
Begin
    MB := Params.Metabase;
    MObj := MB.ItemByIdNamespace["Dict_1", MB.ItemById["NSI_1"].Key].Edit();
    Dict := MObj As IRdsDictionary;
    Dict2 := MB.ItemByIdNamespace["Dict_2", MB.ItemById["NSI_1"].Key].Bind() As IRdsDictionary;
    //Attributes of the first dictionary
    Attrs := Dict.Attributes;
    //Attribute for linking with the dictionary
    LinkAttr := Attrs.Add();
    LinkAttr.DataType := DbDataType.ddtInteger;
    LinkAttr.Id := "LinkAttr";
    LinkAttr.Name := Link attribute;
    //Link with the parameterized dictionary
    Link := Dict.Links.Add();
    Link.Attribute := LinkAttr;
    Link.Reference := Dict2.Attributes.Key;
    Link.Id := "Link";
    Link.Name := Link with the dictionary Dict_2;
    //Parameter that needs to be controlled
    Param := Link.Reference.Dictionary.Params.Item[0];
    //Attribute for linking with the dictionary
    ParamAttr := Attrs.Add();
    ParamAttr.DataType := Param.Attribute.DataType;
    ParamAttr.Id := "ParamAttr";
    ParamAttr.Name := Parameter control;
    //Linking attribute to the parameter of the second dictionary
    ParamsControl := Link.ParamsControl;
    ParamsControl.ParamAttribute[Dict2.Params.Item[0]] := ParamAttr;
    MObj.Save();
End Sub;