Question

我使用以下代码使用名为db.sdf的SQlServer CE创建了一个数据库。

Dim connStr As String = "Data Source =\temp\emp.sdf;"
Try
            'creating database
            Dim engine As SqlCeEngine
            engine = New SqlCeEngine(connStr)
            engine.CreateDatabase()
            engine.Dispose()

            'creating table
            Dim cn As New SqlCeConnection(connStr)
            Dim sql As String
            sql = "CREATE TABLE login "
            sql &= "("
            sql &= "    username   nvarchar(20) PRIMARY KEY,"
            sql &= "    password   nvarchar(20)"
            sql &= ")"
            Dim cmd As New SqlCeCommand(sql, cn)
            cmd.Connection.Open()
            cmd.ExecuteNonQuery()
            cmd.Connection.Close()
            cmd.Dispose()
            cn.Dispose()

            MessageBox.Show("Succesfully created")
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try

但是我不知道它保存这个emp.sdf文件的位置以及如何查看它。我今天刚刚开始研究VB.NET Pocket PC应用程序，我很困惑，因为我的VB.NET连接代码与Pocket PC应用程序不兼容所以请帮我解决这个问题。请任何可以帮助我的教程。感谢

Answer 1

Imports System.Data.SqlClient
Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim connetionString As String
        Dim cnn As SqlConnection

        connetionString = "Data Source=database server name;Initial Catalog=database name"
        cnn = New SqlConnection(connection string)
        Try
            cnn.Open()

            MsgBox("Connection Open ! ")
            cnn.Close()
        Catch ex As Exception
            MsgBox("Can not open connection ! ")


        End Try
    End Sub
End Class

Answer 2

创建数据库时，您已在连接字符串中提供了数据库名称...

Dim connStr As String = "Data Source =\temp\emp.sdf;"

...所以你应该在\ My Device下面找到一个\ temp文件夹，里面有emp.sdf文件。

VB.NET Pocket PC数据库连接

2 个答案: