[英]Get an identity value in a controller for INSERT (Execute Insert command and return inserted Id in Sql)
目前,我正在使用 MVC 創建項目。 現在我想在 INSERT 語句中插入一個身份 ID 值。
在我的 controller 中:
string payment = @"INSERT INTO Payment(Payment_Method,Currency_Type,Total_Amount)
VALUES('{0}','{1}',{2})";
int pay = DBUtl.ExecSQL(payment, "Cash", currency,total);
if (pay == 1)
{
string pid = "SELECT TOP 1 Payment_id FROM Payment ORDER BY Payment_id DESC";
int paymentid = DBUtl.ExecSQL(pid);
if (cart.Count() != 0)
{
string order = @"INSERT INTO [Order](Order_Name,Order_Description,Order_Quantity,Payment_Id)
VALUES('{0}','{1}',{2},{3})";
現在,我想要已經插入到作為第一條語句的payment
表中的 payment_id 並檢索 payment_id 並將其用於Order
表的 INSERT 語句
我怎樣才能做到這一點?
請幫忙
謝謝
實際上, DBUtil
代碼包括:
public static int ExecSQL(string sql, params object[] list)
{
List<String> escParams = new List<String>();
foreach (object o in list)
{
if (o == null)
escParams.Add("");
else
escParams.Add(EscQuote(o.ToString()));
}
DB_SQL = String.Format(sql, escParams.ToArray());
int rowsAffected = 0;
using (SqlConnection dbConn = new SqlConnection(DB_CONNECTION))
using (SqlCommand dbCmd = dbConn.CreateCommand())
{
try
{
dbConn.Open();
dbCmd.CommandText = DB_SQL;
rowsAffected = dbCmd.ExecuteNonQuery();
}
catch (System.Exception ex)
{
DB_Message = ex.Message;
rowsAffected = -1;
}
}
return rowsAffected;
}
如您所知, ExecuteNonQuery
表示影響行的數字
因此,您可以執行以下操作:
適用於 SQL SERVER 2005 及更高版本
using (SqlConnection con=new SqlConnection(@"Your connectionString"))
{
using(SqlCommand cmd=new SqlCommand("INSERT INTO Payment(Payment_Method,Currency_Type,Total_Amount) output INSERTED.Payment_id VALUES(@Payment_Method,@Currency_Type,@Total_Amount)",con))
{
cmd.Parameters.AddWithValue("@Payment_Method", "Cash");
cmd.Parameters.AddWithValue("@Currency_Type", currency);
cmd.Parameters.AddWithValue("@Total_Amount", total);
con.Open();
int payment_id =Convert.ToInt32(cmd.ExecuteScalar());
if (con.State == System.Data.ConnectionState.Open)
con.Close();
return payment_id ;
}
}
此外,您可以將查詢更改為:
"INSERT INTO Payment(Payment_Method,Currency_Type,Total_Amount) VALUES(@Payment_Method,@Currency_Type,@Total_Amount)"; SELECT SCOPE_IDENTITY()"
現在,我嘗試了這樣的事情:
public IActionResult SaveDetail(List<Cart_Has_Services> cart,double total,string currency)
{
string payment = @"INSERT INTO Payment(Payment_Method,Currency_Type,Total_Amount)
VALUES('{0}','{1}',{2});";
int pay = DBUtl.ExecSQL(payment, "Cash", currency,total);
if (pay == 1)
{
object pid = DBUtl.GetList("SELECT Payment_id FROM Payment");
int paymentid = Convert.ToInt32(pid);
if (cart.Count() != 0)
{
string order = @"INSERT INTO [Order](Order_Name,Order_Description,Order_Quantity,Payment_Id)
VALUES('{0}','{1}',{2},{3})";
foreach (var item in cart)
{
int ord = DBUtl.ExecSQL(order, item.Cart_Service, item.Additional_Notes, item.Quantity,paymentid);
就目前而言,代碼將通過將值插入支付表來運行。 之后,我想獲得下一個插入的 payment_id,即訂單表。
我嘗試獲取 payment_id 的方法不起作用。
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