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

Reference

QueryRecordCountException Members
Devart.Common Namespace
QueryRecordCount Property

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