SqlContext Class

Definition

Namespace:

Microsoft.SqlServer.Server

Assembly:

System.Data.dll

Represents an abstraction of the caller's context, which provides access to the SqlPipe, SqlTriggerContext, and WindowsIdentity objects. This class cannot be inherited.

public ref class SqlContext sealed

public sealed class SqlContext

type SqlContext = class

Public NotInheritable Class SqlContext

Inheritance

Object

SqlContext

Examples

The following example creates a new SqlDataRecord and its SqlMetaData. The example then marks the beginning of a result set using the SendResultsStart method, sends records with example data back to the client using the SendResultsRow method, and marks the end of the result set with the SendResultsEnd method.

[Microsoft.SqlServer.Server.SqlProcedure]
public static void StoredProcReturnResultSet()
{
    // Create the record and specify the metadata for the columns.
    SqlDataRecord record = new SqlDataRecord(
        new SqlMetaData("col1", SqlDbType.NVarChar, 100),
        new SqlMetaData("col2", SqlDbType.Int));

    // Mark the begining of the result-set.
    SqlContext.Pipe.SendResultsStart(record);

    // Send 10 rows back to the client.
    for (int i = 0; i < 10; i++)
    {
        // Set values for each column in the row.
        record.SetString(0, "row " + i.ToString());
        record.SetInt32(1, i);

        // Send the row back to the client.
        SqlContext.Pipe.SendResultsRow(record);
    }

    // Mark the end of the result-set.
    SqlContext.Pipe.SendResultsEnd();
}

<Microsoft.SqlServer.Server.SqlProcedure()> _
Public Shared Sub StoredProcReturnResultSet()

    ' Create the record and specify the metadata for the columns.
    Dim record As New SqlDataRecord( _
        New SqlMetaData("col1", SqlDbType.NVarChar, 100), _
        New SqlMetaData("col2", SqlDbType.Int))

    ' Mark the begining of the result-set.
    SqlContext.Pipe.SendResultsStart(record)

    ' Send 10 rows back to the client.
    Dim i As Integer
    For i = 0 To 9

        ' Set values for each column in the row.
        record.SetString(0, "row " & i.ToString())
        record.SetInt32(1, i)

        ' Send the row back to the client.
        SqlContext.Pipe.SendResultsRow(record)
    Next

    ' Mark the end of the result-set.
    SqlContext.Pipe.SendResultsEnd()
End Sub

Remarks

The SqlContext object can be used to obtain the trigger context (for code executing in a trigger) and the pipe object (when available, such as in stored procedures). It can also be used to obtain a WindowsIdentity object that represents the Microsoft Windows identity of the calling client, if the client authenticated with the server using integrated authentication.

Properties

IsAvailable	Specifies whether the calling code is running within SQL Server, and if the context connection can be accessed.
Pipe	Gets the pipe object that allows the caller to send result sets, messages, and the results of executing commands back to the client.
TriggerContext	Gets the trigger context used to provide the caller with information about what caused the trigger to fire, and a map of the columns that were updated.
WindowsIdentity	The Microsoft Windows identity of the caller.