AdoDotNetConnectionSupport.DeriveSchemaCore Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Derives the schema returned from a specified command, indicating the layout of items and blocks in a given data reader.
protected:
virtual Microsoft::VisualStudio::Data::Services::SupportEntities::IVsDataReader ^ DeriveSchemaCore(System::String ^ command, Microsoft::VisualStudio::Data::Services::SupportEntities::DataCommandType commandType, cli::array <Microsoft::VisualStudio::Data::Services::SupportEntities::IVsDataParameter ^> ^ parameters, int commandTimeout);protected virtual Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataReader DeriveSchemaCore(string command, Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandType commandType, Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataParameter[] parameters, int commandTimeout);abstract member DeriveSchemaCore : string * Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandType * Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataParameter[] * int -> Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataReader
override this.DeriveSchemaCore : string * Microsoft.VisualStudio.Data.Services.SupportEntities.DataCommandType * Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataParameter[] * int -> Microsoft.VisualStudio.Data.Services.SupportEntities.IVsDataReaderProtected Overridable Function DeriveSchemaCore (command As String, commandType As DataCommandType, parameters As IVsDataParameter(), commandTimeout As Integer) As IVsDataReader- command
- String
Data source–specific command for which to derive the schema.
- commandType
- DataCommandType
Type of the indicated command, specifying how to interpret the contents of the command parameter.
- parameters
- IVsDataParameter[]
Array of AdoDotNetParameter objects for the specified command type.
- commandTimeout
- Int32
Length of time, in seconds, to block the client before canceling the schema derivation and returning to the caller. A value of zero indicates infinite time-out; value of -1 indicates a provider default.
An IVsDataReader object instance representing the command schema.
| Product | Versions |
|---|---|
| Visual Studio SDK | 2017, 2019, 2022 |