如何從SQL字符串獲取值？ vb.net

Question

我有一些可以完美工作的代碼，但是我不確定如何從String中獲取價值？

Dim SelectQuery As String = "SELECT OrderID FROM Orders_Header"
        Dim WhereQuery As String = " WHERE 1=1"

    Dim SO As String = BOX_SearchSO.Text
    Dim RowID As Integer = Nothing

    If SO = Nothing Then
        LBL_Status.ForeColor = System.Drawing.Color.Red
        LBL_Status.Text = "Please insert SO !"
        Exit Sub
    End If

    If SO <> Nothing Then
        WhereQuery = WhereQuery & " AND DVMOrderNumber LIKE '" & "%" + SO + "%" & "'"
    End If

    Dim myQuery As String = SelectQuery & WhereQuery

MyQuery是完整的SQL查詢，如何從String中獲取值？

Answer 1

建立數據庫連接並從數據庫中獲取數據。 要了解更多信息，請單擊此處

Answer 2

    Dim con As New SqlConnection
    Dim cmd As New SqlCommand

    con = FunctionConnection()
    cmd.Connection = con
    cmd.CommandText = myQuery
    cmd.CommandType = CommandType.Text

    con.Open()
    RowID = cmd.ExecuteScalar
    con.Close()

這是解決方案