我想要做的是使用我的spLogin
存储过程从同一个表中返回两个值,我想在C#中的会话中保存这两个值。
这是表格
create table tbClients
(
ClientID int primary key identity(0,1),
ClientFirstName varchar(20),
ClientLastName varchar(20),
ClientAddress varchar(60),
ClientOrigin varchar(20),
ClientUsername varchar(20),
ClientPassword int,
ClientSecurity int
)
当客户端点击登录按钮时,我想编写一个程序来检查用户是否有效,他们的安全级别是什么,以及他们的名字是什么。
这是我到目前为止所拥有的
create procedure spLogin(
@ClientUsername varchar(20),
@ClientPassword int
)
AS BEGIN
DECLARE @Security int
DECLARE @ClientFirstName varchar(20)
IF EXISTS (SELECT * FROM tbClients
WHERE ClientUsername = @ClientUsername
AND ClientPassword = @ClientPassword)
BEGIN
SELECT
@Security = ClientSecurity,
@ClientFirstName = ClientFirstName
FROM tbClients
WHERE
ClientUsername = @ClientUsername
AND ClientPassword = @ClientPassword
IF(@Security = 1)
BEGIN
SELECT 'Admin' as Security, @ClientFirstName
END
ELSE
BEGIN
SELECT 'Customer' as Security, @ClientFirstName
END
END
ELSE
BEGIN
SELECT 'INVALID'
END
END
GO
不知道这是否有效,因为我不知道如何在不使用数据集的情况下将这些值存储在C#中,到目前为止似乎无法正常工作?
答案 0 :(得分:6)
我会写这个程序有点像这样......
create procedure spLogin
@ClientUsername varchar(20)
,@ClientPassword int
,@Security VARCHAR(10) OUTPUT
,@ClientFirstName varchar(20) OUTPUT
,@ValidLogin INT OUTPUT
AS
BEGIN
SET NOCOUNT ON;
IF EXISTS (SELECT * FROM tbClients
WHERE ClientUsername = @ClientUsername
AND ClientPassword = @ClientPassword)
BEGIN
SELECT @ValidLogin = 1
,@Security = CASE WHEN ClientSecurity = 1
THEN 'Admin' ELSE 'Customer' END
,@ClientFirstName = ClientFirstName
FROM tbClients
WHERE ClientUsername = @ClientUsername
AND ClientPassword = @ClientPassword
END
ELSE
BEGIN
SET @ValidLogin = 0;
END
END
GO
不是C#的专家,但你会在C#中处理输出参数,比如....
// define connection and command, in using blocks to ensure disposal
using(SqlConnection conn = new SqlConnection(pvConnectionString ))
using(SqlCommand cmd = new SqlCommand("dbo.spLogin", conn))
{
cmd.CommandType = CommandType.StoredProcedure;
// set up the input parameters
cmd.Parameters.Add("@ClientUsername", SqlDbType.VarChar, 20);
cmd.Parameters.Add("@ClientPassword", SqlDbType.Int);
cmd.Parameters.Add("@Security", SqlDbType.VarChar, 10).Direction = ParameterDirection.Output;
cmd.Parameters.Add("@ClientFirstName", SqlDbType.VarChar, 20).Direction = ParameterDirection.Output;
cmd.Parameters.Add("@Success", SqlDbType.Int).Direction = ParameterDirection.Output;
// set parameter values
cmd.Parameters["@ClientUsername"].Value = UserNamTextbox.Text;
// open connection and execute stored procedure
conn.Open();
cmd.ExecuteNonQuery();
// read output value from @Security
int Security = Convert.ToInt32(cmd.Parameters["@Security"].Value);
if Security == 1 ....... and so on.......
conn.Close();
}
答案 1 :(得分:0)
所以我不是100%确定你有多少C#,但这里是基础知识:
使用此SO问题中的代码从SQL Server获取数据: Fill DataTable from SQL Server database
然后,一旦你拥有了数据表,就可以使用for循环遍历它(假设你将Datatable定义为'dt'):
foreach (DataRow row in dt.Rows)
{
//do what you need with your data.
var value = row["ColumnName"];
Console.WriteLine(value.ToString());
}
希望有所帮助。
答案 2 :(得分:0)
商店流程只返回一行的结果,您可以检查数据表中是否存在列:
ember server
答案 3 :(得分:0)
您可以执行storedprocedure并将结果填充到数据集中。
每个select语句都将存储为数据表,您可以使用索引访问相应的表。