Release 10.1A: OpenEdge Development:
.NET Open Clients

Adding parameters using a generic method

You can use the following generic method on the Progress.Open4GL.Proxy.ParamArray class to set the parameters in the ParamArray:

Syntax

public void AddParameter (Int32 position, Object value, Int32 mode,                           Int32 proType, Int32 extentValue,                           Progress.Open4GL.DynamicAPI.MetaDataBase metaData)

position

Specifies a 0-based index indicating the parameter position.

value

Specifies a variable of the appropriate Object data type that contains the value for the parameter, or null for an OUTPUT parameter.

mode

Specifies the 4GL mode (passing direction) of the parameter. This can be one of the following constant values:

ParamArrayMode.INPUT
ParamArrayMode.INPUT_OUTPUT
ParamArrayMode.OUTPUT

proType

Specifies the Progress 4GL data type of the parameter indicated by a class constant defined in the Progress.Open4GL.Parameter class, as shown in Table 8–2.

Table 8–2: Progress 4GL parameter data types for the OpenAPI

Progress data type	Progress.Open4GL.Parameter class constant
CHARACTER	PRO_CHARACTER
COM-HANDLE	PRO_COMHANDLE
DATASET	PRO_DATASET
DATASET-HANDLE	PRO_ DATASETHANDLE
DATE	PRO_DATE
DATETIME	PRO_DATETIME
DATETIME-TZ	PRO_DATETIMETZ
DECIMAL	PRO_DECIMAL
INTEGER	PRO_INTEGER
LOGICAL	PRO_LOGICAL
LONGCHAR	PRO_LONGCHAR
MEMPTR	PRO_MEMPTR
RAW	PRO_RAW
RECID	PRO_RECID
ROWID	PRO_ROWID
TEMP-TABLE	PRO_TEMPTABLE
TABLE-HANDLE	PRO_TABLEHANDLE
WIDGET-HANDLE	PRO_WIDGETHANDLE

extentValue

Specifies the extent of an array, 0 or 1 for a scalar value.

metaData

Specifies the schema for ProDataSet or temp-table parameters, where proType is one of the following:

Parameter.PRO_DATASET
Parameter.PRO_DATASETHANDLE
Parameter.PRO_TEMPTABLE
Parameter.PRO_TABLEHANDLE

The value can be specified using one of the following classes:

TempTableMetaData — To define the schema information for temp-table parameters or temp-tables in a ProDataSet. For more information on defining this schema, see the "Defining the schema for a temp-table parameter" section.
ProDataSetMetaData — To define the schema information for ProDataSet parameters. For more information on defining the schema for ProDataSet parameters, see the "Defining the schema for a ProDataSet parameter" section.

When mode is ParamArrayMode.OUTPUT and proType is Parameter.PRO_DATASETHANDLE or Parameter.PRO_TABLEHANDLE (passing a dynamic ProDataSet or temp-table parameter), you can set this parameter to null.