DataCommand.Prepare Method (String, DataCommandType, array<IVsDataParameter , Int32)

Artikel
10/10/2013

Prepares the specified command on the data source to be executed; the command can then be executed multiple times, with varying parameters.

Namespace: Microsoft.VisualStudio.Data.Framework
Assembly: Microsoft.VisualStudio.Data.Framework (in Microsoft.VisualStudio.Data.Framework.dll)

Syntax

'Declaration
Public Overridable Function Prepare ( _
    command As String, _
    commandType As DataCommandType, _
    parameters As IVsDataParameter(), _
    commandTimeout As Integer _
) As String

public virtual string Prepare(
    string command,
    DataCommandType commandType,
    IVsDataParameter[] parameters,
    int commandTimeout
)

public:
virtual String^ Prepare(
    String^ command, 
    DataCommandType commandType, 
    array<IVsDataParameter^>^ parameters, 
    int commandTimeout
)

abstract Prepare : 
        command:string * 
        commandType:DataCommandType * 
        parameters:IVsDataParameter[] * 
        commandTimeout:int -> string  
override Prepare : 
        command:string * 
        commandType:DataCommandType * 
        parameters:IVsDataParameter[] * 
        commandTimeout:int -> string

public function Prepare(
    command : String, 
    commandType : DataCommandType, 
    parameters : IVsDataParameter[], 
    commandTimeout : int
) : String

Parameters

command
Type: System.String

A command to execute that is specific to a data source.

commandType
Type: Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandType

The type of the command that specifies how to interpret the contents of the command parameter. The command type could either be a value from the DataCommandType enumeration or a custom command type defined by a provider, which can be passed in by forcing a cast from an integer to the DataCommandType enumeration.

parameters
Type: array<Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataParameter[]

An array of IVsDataParameter objects representing the command parameters for the specified command type.

commandTimeout
Type: System.Int32

The length of time, in seconds, to block the client before canceling the execution and returning to the caller. A value of 0 indicates infinite time-out; a value of -1 indicates a provider default.

Return Value

Type: System.String
An identifier of the prepared command that can later be passed to the Execute or ExecuteWithoutResults method by using the command type Prepared.

Implements

IVsDataCommand.Prepare(String, DataCommandType, array<IVsDataParameter[], Int32)

Exceptions

Exception	Condition
ArgumentNullException	The command parameter is nulla null reference (Nothing in Visual Basic).
ArgumentOutOfRangeException	The commandTimeout parameter is less than -1.

Remarks

Other exceptions that occur indicate that the preparation 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.

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