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
'宣言
Public Function Prepare ( _
command As String, _
commandType As DataCommandType _
) As String
'使用
Dim instance As DataCommand
Dim command As String
Dim commandType As DataCommandType
Dim returnValue As String
returnValue = instance.Prepare(command, _
commandType)
public string Prepare(
string command,
DataCommandType commandType
)
public:
virtual String^ Prepare(
String^ command,
DataCommandType commandType
) sealed
public final function Prepare(
command : String,
commandType : DataCommandType
) : String
Parameters
command
Type: System.StringA command to execute that is specific to a data source.
commandType
Type: Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandTypeThe 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.
Return Value
Type: System.String
An identifier of the prepared command that can later be passed to the Execute(String, DataCommandType, [], Int32) or ExecuteWithoutResults(String, DataCommandType, [], Int32) method by using the command type Prepared.
Implements
IVsDataCommand.Prepare(String, DataCommandType)
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | The command parameter is a null reference (Nothing in Visual Basic). |
Remarks
Other exceptions that occur indicate that the preparation failed for a provider-specified reason.
Permissions
- 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.