Asp.net MVC 3存儲過程從表中

Question

我對SQL返回一個值什麼，我想回：

CREATE PROCEDURE [Zinc].[GetUserByEmail] 
    @Email nvarchar (256) 
    AS 
    SELECT zu.UserId FROM zinc.users zu WHERE zu.Email = @Email 

然後在我的倉庫我到目前爲止有：

public int GetUserByEmail(string email) 
{ 
    using (SqlConnection conn = new SqlConnection(ZincModelContainer.CONNECTIONSTRING)) 
    { 
     using (SqlCommand cmd = conn.CreateCommand()) 
     { 
      conn.Open(); 

      cmd.CommandType = System.Data.CommandType.StoredProcedure; 
      cmd.CommandText = "[Zinc].[GetUserByEmail]"; 

      //not sure how to go from here? 
     } 
     return userId; 
    } 
} 

Answer 1

既然是標量，使用方法：

cmd.Parameters.Add("@Email", SqlDbType.NChar).Value = email; 
var UserId = cmd.ExecuteScalar(); 

Answer 2

cmd.Parameters.Add("@Email", SqlDbType.NChar).Value = email; 

int UserId = cmd.ExecuteScalar(); 

Answer 3

微軟d倉庫通常是最好的開始。有關從SqlConnection讀取的示例，請參閱：http://msdn.microsoft.com/en-us/library/877h0y3a.aspx。