DataCommand.DeriveParameters Method
Derives the parameters that can be specified for a given command.
Namespace: Microsoft.VisualStudio.Data
Assembly: Microsoft.VisualStudio.Data (in Microsoft.VisualStudio.Data.dll)
Syntax
'Declaración
Public Overridable Function DeriveParameters ( _
command As String, _
commandType As Integer, _
commandTimeout As Integer _
) As DataParameter()
public virtual DataParameter[] DeriveParameters(
string command,
int commandType,
int commandTimeout
)
public:
virtual array<DataParameter^>^ DeriveParameters(
String^ command,
int commandType,
int commandTimeout
)
abstract DeriveParameters :
command:string *
commandType:int *
commandTimeout:int -> DataParameter[]
override DeriveParameters :
command:string *
commandType:int *
commandTimeout:int -> DataParameter[]
public function DeriveParameters(
command : String,
commandType : int,
commandTimeout : int
) : DataParameter[]
Parameters
- command
Type: System.String
A command from which to derive parameters specific to a data source.
- commandType
Type: System.Int32
The command type for the indicated command, specifying how to interpret the contents of the command parameter.
- commandTimeout
Type: System.Int32
The length of time, in seconds, to block the client before canceling the parameter derivation and returning to the caller. A value of 0 indicates infinite timeout; a value of -1 indicates a provider default.
Return Value
Type: array<Microsoft.VisualStudio.Data.DataParameter[]
Returns an array of DataParameter objects. Each object represents a parameter derived from the command.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | The command or asyncCommandEvents are null. |
| ArgumentException | The commandType specifies an invalid type. |
| ArgumentOutOfRangeException | The commandTimeout is less than -1. |
| NotSupportedException | The provider does not support this method. |
Remarks
Once the instances of the derived parameter objects are retrieved, the client owns them and can modify their values as needed; the client will then pass these values to an Execute
call.
Nota
Other exceptions that occur indicate that the parameter derivation failed for a provider-specified reason.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.