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RAD Studio VCL Reference
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TParam.ParamType Property
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RAD Studio VCL Reference
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Indicates the type of the parameter the TParam represents.
property ParamType: TParamType;
__property TParamType ParamType;
Objects that use TParam objects to represent field parameters set ParamType to indicate how the parameter is used. ParamType must be one of the following values:
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Description | |
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ptUnknown |
Unknown or undetermined. Before executing a stored procedure, the application must set parameters of this type to another kind. |
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ptInput |
Used to input a field value. Identifies a parameter used to pass values to a query or stored procedure for processing. |
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ptOutput |
Used to output a field value. Identifies a parameter used by a stored procedure to return values to an application. |
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ptInputOutput |
Used for both input and output. |
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ptResult |
Used as a return value. Identifies a parameter used by a stored procedure to return an error or status value. A stored procedure can only have one parameter of type ptResult. |
Working with Stored Procedure Parameters
Supplying Parameters at Design Time
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Description