Lưu ý
Cần có ủy quyền mới truy nhập được vào trang này. Bạn có thể thử đăng nhập hoặc thay đổi thư mục.
Cần có ủy quyền mới truy nhập được vào trang này. Bạn có thể thử thay đổi thư mục.
Applies to: Access 2013, Office 2013
This example uses the Status property to display which records have been modified in a batch operation before a batch update has occurred.
// BeginStatusJ
import java.io.*;
import com.ms.wfc.data.*;
public class StatusX
{
// The main entry point of the application.
public static void main (String[] args)
{
StatusX();
System.exit(0);
}
// StatusX Function
static void StatusX()
{
// Define ADO Objects.
Recordset rstTitles = null;
// Declarations.
String strCnn = "Provider='sqloledb';Data Source='MySqlServer';"+
"Initial Catalog='Pubs';Integrated Security='SSPI';";
BufferedReader in =
new BufferedReader(new InputStreamReader(System.in));
try
{
// Open Recordset for batch update.
rstTitles = new Recordset();
rstTitles.setCursorType(AdoEnums.CursorType.KEYSET);
rstTitles.setLockType(AdoEnums.LockType.BATCHOPTIMISTIC);
rstTitles.open("Titles", strCnn, AdoEnums.CursorType.KEYSET,
AdoEnums.LockType.BATCHOPTIMISTIC,
AdoEnums.CommandType.TABLE);
// Change the type of psychology titles.
while(!rstTitles.getEOF())
{
if(rstTitles.getField("Type").getString().trim().
equals(new String("psychology")))
rstTitles.getField("Type").setString("self_help");
rstTitles.moveNext();
}
// Display Title ID and status.
rstTitles.moveFirst();
while(!rstTitles.getEOF())
{
if(rstTitles.getStatus()==AdoEnums.RecordStatus.MODIFIED)
System.out.println(rstTitles.getField("title_id").
getString() + "- Modified");
else
System.out.println(rstTitles.getField("title_id").
getString());
rstTitles.moveNext();
}
// Cancel the update because this is a demonstration.
rstTitles.cancelBatch();
System.out.println("Press <Enter> to continue..");
in.readLine();
}
catch(AdoException ae)
{
// Notify the user of any errors that result from ADO.
// As passing a Recordset, check for the null pointer first.
if(rstTitles != null)
{
PrintProviderError(rstTitles.getActiveConnection());
}
else
{
System.out.println("Exception: " + ae.getMessage());
}
}
// System read requires this catch.
catch(java.io.IOException je)
{
PrintIOError(je);
}
finally
{
// Cleanup objects before exit.
if (rstTitles != null)
if (rstTitles.getState() == 1)
rstTitles.close();
}
}
// PrintProviderError Function
static void PrintProviderError(Connection cnn1)
{
// Print Provider Errors from Connection Object.
// ErrItem is an item object in the Connections Errors Collection.
com.ms.wfc.data.Error ErrItem = null;
long nCount = 0;
int i = 0;
nCount = cnn1.getErrors().getCount();
// If there are any errors in the collection, print them.
if ( nCount > 0)
{
// Collection ranges from 0 to nCount-1.
for ( i=0;i<nCount; i++)
{
ErrItem = cnn1.getErrors().getItem(i);
System.out.println("\t Error Number: " + ErrItem.getNumber()
+ "\t" + ErrItem.getDescription());
}
}
}
// PrintIOError Function
static void PrintIOError(java.io.IOException je)
{
System.out.println("Error: \n");
System.out.println("\t Source: " + je.getClass() + "\n");
System.out.println("\t Description: "+ je.getMessage() + "\n");
}
}
// EndStatusJ