Microsoft KB Archive/105976: Difference between revisions
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The RecordCount property, when used with a recordset or snapshot, returns a recordset that has an incorrect number of records.<br /> | The RecordCount property, when used with a recordset or snapshot, returns a recordset that has an incorrect number of records.<br /> | ||
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This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the | This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.<br /> | ||
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NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access versions 1.x and 2.0. For more information about Access Basic, please refer to the | NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access versions 1.x and 2.0. For more information about Access Basic, please refer to the "Introduction to Programming" manual in Microsoft Access version 1.x or the "Building Applications" manual in Microsoft Access version 2.0. | ||
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Dim MyRS as Recordset | Dim MyRS as Recordset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.OpenRecordset( | Set MyRS = MyDb.OpenRecordset("Customers", dbOpenDynaset) | ||
MyWrongRecordCount = MyRS.RecordCount | MyWrongRecordCount = MyRS.RecordCount | ||
MyRS.Close | MyRS.Close | ||
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Dim MyRS as Recordset | Dim MyRS as Recordset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.OpenRecordset( | Set MyRS = MyDb.OpenRecordset("Customers", dbOpenDynaset) | ||
MyRS.MoveLast | MyRS.MoveLast | ||
MyRightRecordCount = MyRS.RecordCount | MyRightRecordCount = MyRS.RecordCount | ||
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Dim MyRS as Recordset | Dim MyRS as Recordset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.OpenRecordset( | Set MyRS = MyDb.OpenRecordset("Customers", DB_OPEN_DYNASET) | ||
MyWrongRecordCount = MyRS.RecordCount | MyWrongRecordCount = MyRS.RecordCount | ||
MyRS.Close | MyRS.Close | ||
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Dim MyRS as Recordset | Dim MyRS as Recordset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.OpenRecordset( | Set MyRS = MyDb.OpenRecordset("Customers", DB_OPEN_DYNASET) | ||
MyRS.MoveLast | MyRS.MoveLast | ||
MyRightRecordCount = MyRS.RecordCount | MyRightRecordCount = MyRS.RecordCount | ||
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Dim MyRS as Dynaset | Dim MyRS as Dynaset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.CreateDynaset( | Set MyRS = MyDb.CreateDynaset("Customers") | ||
MyWrongRecordCount = MyRS.RecordCount | MyWrongRecordCount = MyRS.RecordCount | ||
MyRS.Close | MyRS.Close | ||
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Dim MyRS as Dynaset | Dim MyRS as Dynaset | ||
Set MyDB = CurrentDB() | Set MyDB = CurrentDB() | ||
Set MyRS = MyDb.CreateDynaset( | Set MyRS = MyDb.CreateDynaset("Customers") | ||
MyRS.MoveLast | MyRS.MoveLast | ||
MyRightRecordCount = MyRS.RecordCount | MyRightRecordCount = MyRS.RecordCount |
Latest revision as of 09:57, 20 July 2020
Article ID: 105976
Article Last Modified on 1/18/2007
APPLIES TO
- Microsoft Access 1.0 Standard Edition
- Microsoft Access 1.1 Standard Edition
- Microsoft Access 2.0 Standard Edition
- Microsoft Access 95 Standard Edition
- Microsoft Access 97 Standard Edition
This article was previously published under Q105976
Moderate: Requires basic macro, coding, and interoperability skills.
SYMPTOMS
The RecordCount property, when used with a recordset or snapshot, returns a recordset that has an incorrect number of records.
This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.
NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access versions 1.x and 2.0. For more information about Access Basic, please refer to the "Introduction to Programming" manual in Microsoft Access version 1.x or the "Building Applications" manual in Microsoft Access version 2.0.
CAUSE
For recordsets and snapshots, Microsoft Access does not automatically return the number of records that exist in the recordset. Rather, it returns the number of records accessed.
RESOLUTION
To determine the exact number of records in a recordset or snapshot, use the MoveLast method before checking the RecordCount property.
STATUS
This behavior is by design.
MORE INFORMATION
The following Visual Basic function, MyWrongRecordCount(), returns the number 1 for the Customers table in the sample database Northwind.mdb (or NWIND.MDB in versions 1.x and 2.0) because only one record has been accessed. The MyRightRecordCount() function uses the MoveLast method first to access all records in the recordset and then to return the RecordCount value.
Steps to Reproduce Behavior
- Open the sample database Northwind.mdb (or NWIND.MDB in versions 1.x and 2.0).
- Create a module and type the following line in the Declarations section if it is not already there:
Option Explicit
Type the following procedures:
In Microsoft Access 7.0 and 97:'=========================================================== ' The following function, MyWrongRecordCount(), demonstrates ' the incorrect way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyWrongRecordCount () Dim MyDB As Database Dim MyRS as Recordset Set MyDB = CurrentDB() Set MyRS = MyDb.OpenRecordset("Customers", dbOpenDynaset) MyWrongRecordCount = MyRS.RecordCount MyRS.Close End Function '=========================================================== ' The following function, MyRightRecordCount(), demonstrates ' the correct way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyRightRecordCount () Dim MyDB As Database Dim MyRS as Recordset Set MyDB = CurrentDB() Set MyRS = MyDb.OpenRecordset("Customers", dbOpenDynaset) MyRS.MoveLast MyRightRecordCount = MyRS.RecordCount MyRS.Close End Function In Microsoft Access 2.0: '=========================================================== ' The following function, MyWrongRecordCount(), demonstrates ' the incorrect way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyWrongRecordCount () Dim MyDB As Database Dim MyRS as Recordset Set MyDB = CurrentDB() Set MyRS = MyDb.OpenRecordset("Customers", DB_OPEN_DYNASET) MyWrongRecordCount = MyRS.RecordCount MyRS.Close End Function '=========================================================== ' The following function, MyRightRecordCount(), demonstrates ' the correct way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyRightRecordCount () Dim MyDB As Database Dim MyRS as Recordset Set MyDB = CurrentDB() Set MyRS = MyDb.OpenRecordset("Customers", DB_OPEN_DYNASET) MyRS.MoveLast MyRightRecordCount = MyRS.RecordCount MyRS.Close End Function In Microsoft Access 1.x: '=========================================================== ' The following function, MyWrongRecordCount(), demonstrates ' the incorrect way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyWrongRecordCount () Dim MyDB As Database Dim MyRS as Dynaset Set MyDB = CurrentDB() Set MyRS = MyDb.CreateDynaset("Customers") MyWrongRecordCount = MyRS.RecordCount MyRS.Close End Function '=========================================================== ' The following function, MyRightRecordCount(), demonstrates ' the correct way to use the RecordCount property to count ' records in a dynaset. '=========================================================== Function MyRightRecordCount () Dim MyDB As Database Dim MyRS as Dynaset Set MyDB = CurrentDB() Set MyRS = MyDb.CreateDynaset("Customers") MyRS.MoveLast MyRightRecordCount = MyRS.RecordCount MyRS.Close End Function
To test these functions, type the following lines in the Debug window (or Immediate window in versions 1.x and 2.0), and then press ENTER after you've entered each one:
?MyWrongRecordCount()
Note that the function returns 1.
?MyRightRecordCount()
Note that the function returns the correct number of records in the Customers table.
REFERENCES
For more information about RecordCount Property, search the Help Index for RecordCount Property, or ask the Microsoft Access 97 Office Assistant.
Additional query words: record count move last
Keywords: kbprb kbprogramming KB105976