[英]SQL Server stored procedure and execute in VB.NET
This is a bit old-contents to be discussed but I need someone who can explain me how to create stored procedure in SQL Server for returning a value from procedure, example: 这是一个有待讨论的旧内容,但我需要有人可以解释如何在SQL Server中创建存储过程以从过程返回值,例如:
SELECT NAME, ADDRESS
FROM CUSTOMER
WHERE IDCUSTOMER = 'DS212';
Then I need the name of its customer and the address instead. 然后我需要其客户的名称和地址。
I need to make it as a stored procedure and show me how to execute it on VB.NET. 我需要将它作为存储过程,并告诉我如何在VB.NET上执行它。 Perhaps we assume that the name will be prompted to LABEL1.TEXT and the address will be prompted to LABEL2.TEXT.
也许我们假设名称将被提示到LABEL1.TEXT,并且地址将被提示到LABEL2.TEXT。
I've improved this SQL-Server Stored Procedure Using return but I have nothing to return after I execute it 我已经改进了这个SQL-Server存储过程使用return但是在执行它之后我没有任何东西可以返回
CREATE PROCEDURE inserting_customer
@custId varchar(10),
@usr_id int
AS
BEGIN
SET @usr_id = (SELECT MAX(SUBSTRING(CUSTOMER.idCustomer,3, LEN(CUSTOMER.IDCUSTOMER))) FROM CUSTOMER
WHERE
SUBSTRING(CUSTOMER.idCustomer,1,2) = @custId)
END
RETURN @usr_id
GO
This is my VB.NET 这是我的VB.NET
conn.Open()
Dim cmd As New SqlCommand("inserting_customer", conn)
Try
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add("@custId", SqlDbType.VarChar)
cmd.Parameters("@custId").Value = "YW"
cmd.Parameters.Add("@usr_id", SqlDbType.Int)
cmd.Parameters("@usr_id").Value = 0
cmd.ExecuteNonQuery()
Finally
If cmd IsNot Nothing Then cmd.Dispose()
If conn IsNot Nothing AndAlso conn.State <> ConnectionState.Closed Then conn.Close()
End Try
Supposing you have this sproc in sqlserver 假设你在sqlserver中有这个sproc
CREATE PROCEDURE GetNameAddress(@custID nvarchar(10))
as
BEGIN
SELECT NAME,ADDRESS FROM CUSTOMER WHERE IDCUSTOMER = @custID;
END
you call it and get the result in the standard way 你打电话给它,并以标准方式得到结果
' GetConnection is a method that creates and return the '
' SqlConnection used here according to your connection string'
Using cn = GetConnection()
cn.Open()
' Create the command with the sproc name and add the parameter required'
Dim cmd As SqlCommand = new SqlCommand("GetNameAddress", cn)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.AddWithValue("@custID", "DS212")
' Ask the command to create an SqlDataReader on the result of the sproc'
Using r = cmd.ExecuteReader()
' If the SqlDataReader.Read returns true then there is a customer with that ID'
if r.Read() then
' Get the first and second field frm the reader'
lblName.Text = r.GetString(0)
lblAddress.Text = r.GetString(1)
end if
End Using
End using
Notice that this is the standard approach when you expect zero or one record returned by the sproc. 请注意,当您期望sproc返回零或一条记录时,这是标准方法。 If you have more than one record then you use a while loop over the SqlDataReader.Read method and you should provide the controls where store the returned records.
如果你有多个记录,那么你在SqlDataReader.Read方法上使用while循环,你应该提供存储返回记录的控件。
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