数据库附近的语法不正确

Question

“ Database [DatabaseName]”中出现语法错误提示

Here is the screenshot of the error

我不知道查询中有什么错误。

这是此问题的代码：

Private Sub btnBackUp_Click(sender As Object, e As EventArgs) Handles btnBackUp.Click
        Try
            Me.Cursor = Cursors.WaitCursor
            Dim Filename As String
            get_servername = cmbservername.Text.Trim
            get_userid = txtuser.Text.Trim
            get_password = txtpassword.Text.Trim
            database = cmbdatabase.Text
        If cmbauth.SelectedIndex = 0 Then
            constr = "Data Source=" & get_servername & ";Initial Catalog=" & cmbdatabase.Text & "; Integrated Security= True "
        Else
            constr = "Data Source=" & get_servername & ";Initial Catalog=" & cmbdatabase.Text & "; user id=" & get_userid & ";password=" & get_password & ";Integrated Security=false"
        End If
        con = New SqlConnection(constr)
        con.Open()
        Dim strquery As String
        Dim save_dialog As New SaveFileDialog
        save_dialog.FileName = database
        save_dialog.ShowDialog()
        Filename = save_dialog.FileName
        strquery = "BACKUP DATABASE" & database & " TO DISK ='" & Filename & "'"
        Me.Cursor = Cursors.Default
        Try
            com = New SqlCommand(strquery, con)
            data_affector = com.ExecuteNonQuery
            MessageBox.Show("Backup has been successfully created", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Me.Cursor = Cursors.Default
        Catch ex As Exception
            Me.Cursor = Cursors.Default
            MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Exit Sub
        End Try
    Catch ex As Exception
        Me.Cursor = Cursors.Default
        MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Information)

    End Try

End Sub

Answer 1

您在查询中缺少空格

strquery = "BACKUP DATABASE" & database & " TO DISK ='" & Filename & "'"

如果数据库的值为Northwinds，则查询将从BACKUP DATABASENorthwinds开始。尝试更新以添加空间：

strquery = "BACKUP DATABASE " & database & " TO DISK ='" & Filename & "'"