QueryRecordCountException Class

In This Topic

Describes an error that is raised during record count request process.

Syntax

Visual Basic
C#

'Declaration
 
Public Class QueryRecordCountException 
   Inherits System.Exception
   Implements System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

public class QueryRecordCountException : System.Exception, System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

Remarks

This class is used to differentiate exceptions from DbDataTable.QueryRecordCount and other fetch exceptions. The actual error message can be accessed via the System.Exception.InnerException property.

Example

The sample shows a catch block that is defined to catch a QueryRecordCountException exception.

csharp

// Create a command selecting all records from the Dept table.
Devart.Data.PostgreSql.PgSqlCommand command = new Devart.Data.PostgreSql.PgSqlCommand("select * from Dept");
try
{
    // Execution of the command will fail as no connection is set to it.
    command.GetRecordCount();
}
catch (QueryRecordCountException ex)
{
    // Use the InnerException property to determine the actual error occurred.
    Console.WriteLine("An error occurred while counting records in the result set: " 
        + ex.InnerException.Message);
}

Visual Basic

' Create a command selecting all records from the Dept table.
Dim command = New Devart.Data.PostgreSql.PgSqlCommand("select * from Dept")
Try
    ' Execution of the command will fail as no connection is set to it.
    command.GetRecordCount()
Catch ex As QueryRecordCountException
    ' Use the InnerException property to determine the actual error occurred.
    Console.WriteLine("An error occurred while counting records in the result set: " _
        + ex.InnerException.Message)
End Try

Inheritance Hierarchy

System.Object
System.Exception
Devart.Common.QueryRecordCountException

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

QueryRecordCountException Members
Devart.Common Namespace
QueryRecordCount Property

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