SqlError.Class Property

Definition

Namespace:

System.Data.SqlClient

Assembly:

System.Data.SqlClient.dll

Package:

System.Data.SqlClient v4.8.6

Gets the severity level of the error returned from SQL Server.

public:
 property System::Byte Class { System::Byte get(); };

public byte Class { get; }

member this.Class : byte

Public ReadOnly Property Class As Byte

Property Value

Byte

A value from 1 to 25 that indicates the severity level of the error. The default is 0.

Examples

The following example displays each SqlError within the SqlErrorCollection collection.

public void DisplaySqlErrors(SqlException exception)
{
    for (int i = 0; i < exception.Errors.Count; i++)
    {
        Console.WriteLine("Index #" + i + "\n" +
            "Source: " + exception.Errors[i].Source + "\n" +
            "Number: " + exception.Errors[i].Number.ToString() + "\n" +
            "State: " + exception.Errors[i].State.ToString() + "\n" +
            "Class: " + exception.Errors[i].Class.ToString() + "\n" +
            "Server: " + exception.Errors[i].Server + "\n" +
            "Message: " + exception.Errors[i].Message + "\n" +
            "Procedure: " + exception.Errors[i].Procedure + "\n" +
            "LineNumber: " + exception.Errors[i].LineNumber.ToString());
    }
    Console.ReadLine();
}

Public Sub DisplaySqlErrors(ByVal exception As SqlException)
    Dim i As Integer

    For i = 0 To exception.Errors.Count - 1
        Console.WriteLine(("Index #" & i & ControlChars.NewLine & _
            "Source: " & exception.Errors(i).Source & ControlChars.NewLine & _
            "Number: " & exception.Errors(i).Number.ToString() & ControlChars.NewLine & _
            "State: " & exception.Errors(i).State.ToString() & ControlChars.NewLine & _
            "Class: " & exception.Errors(i).Class.ToString() & ControlChars.NewLine & _
            "Server: " & exception.Errors(i).Server & ControlChars.NewLine & _
            "Message: " & exception.Errors(i).Message & ControlChars.NewLine & _
            "Procedure: " & exception.Errors(i).Procedure & ControlChars.NewLine & _
            "LineNumber: " & exception.Errors(i).LineNumber.ToString()))
    Next i
    Console.ReadLine()
End Sub

Remarks

Messages with a severity level of 10 or less are informational and indicate problems caused by mistakes in information that a user has entered. Severity levels from 11 through 16 are generated by the user, and can be corrected by the user. Severity levels from 17 through 25 indicate software or hardware errors. When a level 17, 18, or 19 error occurs, you can continue working, although you might not be able to execute a particular statement.

The SqlConnection remains open when the severity level is 19 or less. When the severity level is 20 or greater, the server usually closes the SqlConnection. However, the user can reopen the connection and continue. In both cases, a SqlException is generated by the method executing the command.

For more information on errors generated by SQL Server, see Database Engine Events and Errors.

See also

• ADO.NET Overview