ADODataSet1.Parameters[0].Value:=username;
到这时出现错误
List index out of bounds(0)ADODataSet1.CommandType:=cmdText;
AdoDataSet1.CommandText:='Select * from 操作员表 where 操作员名=:username';
adodataset1.Open;
怎么回事?
到这时出现错误
List index out of bounds(0)ADODataSet1.CommandType:=cmdText;
AdoDataSet1.CommandText:='Select * from 操作员表 where 操作员名=:username';
adodataset1.Open;
怎么回事?
ADODataSet1.CommandText:='select * from authors where city=:city';
ADODataSet1.Parameters.ParamByName('city').Value:='Oakland';
ADODataSet1.Open;
ADODataSet1.CommandText:='select * from authors where city=:city';
ADODataSet1.Parameters[0].Value:='Oakland';//我这样写也没报错啊!!
ADODataSet1.Open;
AdoDataSet1.CommandText:='Select * from 操作员表 where 操作员名=:username';
这两句.没有指定变量
AdoDataSet1.CommandText:='Select * from 操作员表 where 操作员名=:username';
// SQL语句的后边
ADODataSet1.Parameters[0].Value:=username;
adodataset1.Open;