我有一個工作數據集和datagrid已經在我的項目,但我想做我自己的quicksearch按鈕。下面的代碼提供了錯誤的ConnectionString Provider關鍵字不被支持如何從VB.net(訪問數據庫)做一個簡單的SQL查詢
connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\prod.mdb"
sql = "Select (*) from table1 where prodid=" + searchfield.Text
cnn = New SqlConnection(connetionString)
Try
cnn.Open()
cmd = New SqlCommand(sql, cnn)
Dim ret = (cmd.ExecuteScalar())
cmd.Dispose()
cnn.Close()
Text = ret
不應該使用OleDbConnection而不是SQLConnection? SQLConnection是爲SQLServer – 2009-06-02 07:47:22