Vb.net 用户登录失败''；。错误

我知道这是一篇重复的文章，但我找不到关于这个主题的解决方案。我想连接调试文件夹中的sql文件，但出现错误，用户“”登录失败

你能告诉我我的错误吗

 Dim ds As New DataSet()
 Using connection As New SqlConnection(String.Format("Data Source=.\SQLEXPRESS;AttachDbFilename={0}\Word.mdf;Integrated Security=true;Connect Timeout=30;User Instance=True", My.Application.Info.DirectoryPath))                   
       connection.Open()
       Using command As New SqlCommand("SELECT * FROM test", connection)
             command.CommandTimeout = 0
             Using da As New SqlDataAdapter(command)
                   da.Fill(ds)
             End Using
       End Using
 End Using

 DataGridView1.DataSource = ds   
 MakePivot()
 DataGridView2.ClearSelection()

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试试这段代码，需要设置“integratedsecurity=true”

否，关于mdf文件的一切都可以。

 Dim ds As New DataSet()
 Using connection As New SqlConnection(String.Format("Data Source=.\SQLEXPRESS;AttachDbFilename={0}\Word.mdf;Integrated Security=true;Connect Timeout=30;User Instance=True", My.Application.Info.DirectoryPath))                   
       connection.Open()
       Using command As New SqlCommand("SELECT * FROM test", connection)
             command.CommandTimeout = 0
             Using da As New SqlDataAdapter(command)
                   da.Fill(ds)
             End Using
       End Using
 End Using

 DataGridView1.DataSource = ds   
 MakePivot()
 DataGridView2.ClearSelection()