Question

我的SQL代码在服务器上运行。

SELECT 
    [LINE_NO], [CUST_ORDER_ID], [PART_ID], 
    [CUSTOMER_PART_ID], [MISC_REFERENCE], [PROMISE_DATE], 
    [PROMISE_DEL_DATE] 
FROM 
    [CUST_ORDER_LINE] 
WHERE 
    ([CUST_ORDER_ID] = '33742-1' 
     AND [PROMISE_DATE] IS NULL
     AND [PROMISE_DEL_DATE] IS NULL)

我的asp.net代码。

SelectCommand = "SELECT [LINE_NO], [CUST_ORDER_ID], [PART_ID], [CUSTOMER_PART_ID], [MISC_REFERENCE], [PROMISE_DATE], [PROMISE_DEL_DATE] FROM [CUST_ORDER_LINE] WHERE ([CUST_ORDER_ID] = ? AND [PROMISE_DATE] = ? AND [PROMISE_DEL_DATE] = ?)"

我正在使用3个查询字符串参数。承诺日期和承诺交付日期可以为空。但是当这些值为null时，它不返回任何记录。

如何对此进行编程以将SQL更改为'is null'而不是= ''。

Answer 1

我认为这就是你想要的：

Param 1 = OrderID
Param 2/3都是Promise Date
Param 4/5都是承诺交付日期

代码：

https: before //ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js

SQL将是：

SelectCommand = "SELECT [LINE_NO], [CUST_ORDER_ID], [PART_ID], [CUSTOMER_PART_ID], [MISC_REFERENCE], [PROMISE_DATE], [PROMISE_DEL_DATE] FROM [CUST_ORDER_LINE] WHERE [CUST_ORDER_ID] = ? AND (? IS NULL OR [PROMISE_DATE] = ?) AND (? IS NULL OR [PROMISE_DEL_DATE] = ?)"

SqlDataSource SelectCommand包含空值

1 个答案: