Question

我有两个具有相同列的表。我想知道的是如何从数据库中查看两个表到一个数据网格视图？

这是我的代码

con = New MySqlConnection
con.ConnectionString = cons
ds = New Dataset
tables = ds.Tables

da = New MysqlDataAdapter("Select * from haspostingusername where User ='" & txtUser.Text & "'",con)
d1 = New MysqlDataAdapter("Select * from laspostingusername where User ='" & txtUser.Text & "'",con)
da.Fill(ds, "hapostingusername")
da1.Fill(ds, "lapostingusername")
Dim view As New DataView(tables(0))
DgvReport.DataSource = view

请帮助我。谢谢！

Answer 1

尝试使用union并一次性返回结果。而不是

da = New MysqlDataAdapter("Select * from haspostingusername where User ='" & txtUser.Text & "'",con)
d1 = New MysqlDataAdapter("Select * from laspostingusername where User ='" & txtUser.Text & "'",con)

你可以尝试

foobar = New MysqlDataAdapter("Select * from haspostingusername where User ='" & txtUser.Text & " UNION Select * from laspostingusername where User ='" & txtUser.Text & "'",con)

此外，如果从用户输入txtUser，您应该将其包装在准备好的语句中以避免SQL注入。

Answer 2

现在好了。非常感谢你！ :)是我的代码：

da = New MysqlDataAdapter("Select * from haspostingusername where User ='" & txtUser.Text & "' UNION ALL Select * from laspostingusername where User ='" & txtUser.Text & "'",con)

如何在一个gridview中查看两个表？

2 个答案: