如何從SQL String中獲取值？ vb.net

Question

我有一些完美的代碼，但我不知道如何從字符串中獲取值？

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，我如何從字符串中獲取值？

Answer 1

建立數據庫連接並從數據庫中獲取數據。要了解更多，請點擊here

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