How can the information be retrieved from a table in an ADODB.RecordSet using VB?

In VB, you can use loops to iterate through ADODB.Recordset objects to retrieve information from a table. Below is an example code demonstrating how to extract information from a table using Recordset.

Dim conn As New ADODB.Connection
Dim rs As New ADODB.Recordset

' 建立数据库连接
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\your_database.mdb;"

' 执行SQL查询并将结果存储在Recordset中
rs.Open "SELECT * FROM your_table", conn

' 遍历Recordset并获取表的信息
Do While Not rs.EOF
    ' 获取每一行记录的字段值
    Dim fieldValue As String
    fieldValue = rs.Fields("your_field_name").Value
    
    ' 处理获取到的字段值
    ' ...
    
    ' 移动到下一条记录
    rs.MoveNext
Loop

' 关闭Recordset和数据库连接
rs.Close
conn.Close
Set rs = Nothing
Set conn = Nothing

In the above code, first an ADODB.Connection object conn is created and the database connection is opened using the Open method. Then an ADODB.Recordset object rs is created and the SQL query is executed using the Open method, storing the query result in the Recordset. Next, a Do While loop is used to iterate through each record in the Recordset, retrieving the field values of each record using the Fields property. For each record, processing can be done as needed. After processing a record, the MoveNext method is used to move the Recordset to the next record until rs.EOF is True, indicating that the entire Recordset has been traversed. Finally, the Recordset and database connection are closed to release resources.

Please note that the above examples assume the use of a Microsoft Access database (.mdb file), if using a different type of database, the connection string needs to be modified. Additionally, the SQL query and code for retrieving field values need to be adjusted according to your table structure and field names.