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Lazarus+KOL for wince 下使用Tsqlite3dataset控件操作SQLite3要注意的事项

2009-05-13 14:51:06| 分类： Delphi | 标签： |举报 |字号大中小订阅

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作者：廖伯志

Lazarus+KOL for wince 下使用Tsqlite3dataset控件操作SQLite3要注意的事项：

1)使用KOL-CE时，不能使用sqlite3dataset可视控件，只能用代码创建：

var   sqlite3dataset1 :Tsqlite3dataset;  
begin  
  sqlite3dataset1:=tsqlite3dataset.Create(nil);  
..  
End;

2)必须将数据库的文件名及路径用UTF8Encode转为UTF8否则含中文时会出错,例如：
Sqlite3Dataset1.FileName:= UTF8Encode((ExtractFilePath(ParamStr(0))+'myTest.db'));
3)读取含中文内容时，要用PWideChar(UTF8Decode(要取的字段))，例如：
editbox2.text:=PWideChar(UTF8Decode(Sqlite3Dataset1.FieldByName('uname').AsString));

sqlite3dataset1:=tsqlite3dataset.Create(nil);  
Sqlite3Dataset1.FileName:= UTF8Encode((ExtractFilePath(ParamStr(0))+'myTest.db'));//必须将文件名及路径转为UTF8否则含中文时会出错  
Sqlite3Dataset1.TableName:='Demo';  
Sqlite3Dataset1.SQL:='select * from demo';  
Sqlite3Dataset1.Active:=true;  
editbox1.text:=Sqlite3Dataset1.FieldByName('uid').AsString;  
editbox2.text:=PWideChar(UTF8Decode(Sqlite3Dataset1.FieldByName('uname').AsString));  
Sqlite3Dataset1.First;  
i:=0;  
while not Sqlite3Dataset1.EOF do 
begin  
  ListView1.LVItemAdd('');  
  ListView1.LVItems[i,0] :=(Sqlite3Dataset1.FieldByName('uid').AsString);  
  ListView1.LVItems[i,1] :=(PWideChar(UTF8Decode(Sqlite3Dataset1.FieldByName('uname').AsString)));  
  inc(i);  
  Sqlite3Dataset1.Next;  
end;  
Sqlite3Dataset1.First;

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              blogAbstract:'作者：廖伯志<br\><br\><p\>Lazarus+KOL for wince 下使用Tsqlite3dataset控件操作SQLite3要注意的事项：</p\><p\>1)使用KOL-CE时，不能使用sqlite3dataset可视控件，只能用代码创建：<br\></p\><pre\><ol \><li \><span\><span\>var   sqlite3dataset1 :Tsqlite3dataset;  </span\></span\></li\><li\><span\>begin  </span\></li\><li \><span\>  sqlite3dataset1:=tsqlite3dataset.Create(nil);  </span\></li\><li\><span\>..  </span\></li\><li \><span\>End;  </span\></li\></ol\></pre\><p\>2)必须将数据库的文件名及路径用UTF8Encode转为UTF8否则含中文时会出错,例如：<br\>   Sqlite3Dataset1.FileName:= UTF8Encode((ExtractFilePath(ParamStr(0))+\'myTest.db\'));<br\>3)读取含中文内容时，要用PWideChar(UTF8Decode(要取的字段))，例如：</p\>',
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