我是数据库与应用程序接口(interface)的新手,并且正在尝试从数据库中提取几个字段,其中我指定的参数应该过滤掉结果。我不断收到没有提供参数或参数的消息。谁能对此有所了解?谢谢。
下面是存储过程:
ALTER PROC dbo.PassParamUserID
AS
set nocount on
DECLARE @UserID int;
SELECT f_Name, l_Name
FROM tb_User
WHERE tb_User.ID = @UserID;
这是我的代码
class StoredProcedureDemo
{
static void Main()
{
StoredProcedureDemo spd = new StoredProcedureDemo();
//run a simple stored procedure that takes a parameter
spd.RunStoredProcParams();
}
public void RunStoredProcParams()
{
SqlConnection conn = null;
SqlDataReader rdr = null;
string ID = "2";
Console.WriteLine("\n the customer full name is:");
try
{
//create a new connection object
conn = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=c:\\Program Files\\Microsoft SQL Server\\MSSQL10.SQLEXPRESS\\MSSQL\\DATA\\UserDB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True; Integrated Security=SSPI");
conn.Open();
//create command objects identifying the stored procedure
SqlCommand cmd = new SqlCommand("PassParamUserID", conn);
//Set the command object so it know to execute the stored procedure
cmd.CommandType = CommandType.StoredProcedure;
//ADD PARAMETERS TO COMMAND WHICH WILL BE PASSED TO STORED PROCEDURE
cmd.Parameters.Add(new SqlParameter("@UserID", 2));
//execute the command
rdr = cmd.ExecuteReader();
//iterate through results, printing each to console
while (rdr.Read())
{
Console.WriteLine("First Name: {0,25} Last Name: {0,20}", rdr["f_Name"], rdr["l_Name"]);
}
}
最佳答案
您需要将 SQL 存储过程修改为:
ALTER PROC dbo.PassParamUserID
@UserID int
AS set nocount on
SELECT f_Name, l_Name FROM tb_User WHERE tb_User.ID = @UserID;
目前您只需将其声明为过程中的变量。
以下一些 MSDN 文章可能会帮助您继续前进:
关于c# - 通过存储过程传递参数,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4661058/