Dispatches the asynchronous prepare operation to the synchronous Prepare method call.
Namespace:  Microsoft.VisualStudio.Data.Framework
Assembly:  Microsoft.VisualStudio.Data.Framework (in Microsoft.VisualStudio.Data.Framework.dll)
Syntax
声明
Protected Overridable Function OnPrepare ( _
    command As String, _
    commandType As DataCommandType, _
    parameters As IVsDataParameter(), _
    commandTimeout As Integer _
) As String
protected virtual string OnPrepare(
    string command,
    DataCommandType commandType,
    IVsDataParameter[] parameters,
    int commandTimeout
)
protected:
virtual String^ OnPrepare(
    String^ command, 
    DataCommandType commandType, 
    array<IVsDataParameter^>^ parameters, 
    int commandTimeout
)
abstract OnPrepare : 
        command:string * 
        commandType:DataCommandType * 
        parameters:IVsDataParameter[] * 
        commandTimeout:int -> string 
override OnPrepare : 
        command:string * 
        commandType:DataCommandType * 
        parameters:IVsDataParameter[] * 
        commandTimeout:int -> string 
protected function OnPrepare(
    command : String, 
    commandType : DataCommandType, 
    parameters : IVsDataParameter[], 
    commandTimeout : int
) : String
Parameters
- command
Type: System.String
The command for which the schema is derived. 
- commandType
Type: Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandType
A value from the DataCommandType enumeration representing the command type for the indicated command. The value specifies how to interpret the contents of the command parameter. 
- parameters
Type: array<Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataParameter[]
A list of parameters to pass with the command. 
- commandTimeout
Type: System.Int32
Amount of time, in seconds, before which the command times out. 
Return Value
Type: System.String
An identifier of the prepared command that can later be passed to the Execute or ExecuteWithoutResults methods by using the command type Prepared.
.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.