我有这个SQL Select语句来选择用户id等于特定ID的篮子ID。
我想将查询结果存储在变量中,所以我想我可以做到:
BasketPage.SelectCommand="SELECT BasketID FROM tblBasket WHERE (UserID = '9f96bd94-91b9-4328-8214-4eac179c3a26')"
var BasketID = BasketPage.ExecuteScalar().ToString();
但显然我需要创建一个新的SQL命令实例才能工作,如何为BasketPage Select命令执行此操作?
答案 0 :(得分:2)
我不知道你的BasketPage
,但是你无法使用ExecuteScalar
方法对底层数据库执行此查询。假设SQL Server:
using (var connection = new SqlConnection(connString))
using (var command = connection.CreateCommand()) {
command.CommandText = "select BasketId from tblBasket where UserId = N'9f96bd94-91b9-4328-8214-4eac179c3a26'";
command.CommandType = CommandType.Text;
try {
var basketId = (string)command.ExecuteScalar(); // Assuming BasketId is a string, since you called ToString() in your question.
} finally {
command.Dispose();
connection.Dispose();
}
}
答案 1 :(得分:1)
假设您正在使用SQL Server,您尝试了类似
的内容BasketPage.SelectCommand =
new SqlCommand("SELECT BasketID FROM tblBasket WHERE (UserID = '9f96bd94-91b9-4328-8214-4eac179c3a26')",
"yourconnectionstring");