在C＃.NET应用程序传递存储过程的参数

Question

我有一个存储过程，我把它连接到我的项目，我想知道我可以通过不同的参数类型：

存储过程：

[dbo].[UploadAssignment] 
      @studentId int  
    , @guid uniqueidentifier 
    , @originalfilename nvarchar(500) 
    , @uploaddate datetime  

在我的项目：

public virtual IEnumerable<T> GetUploadStudentSubmission<T>(int studentId, .."How should i format the remaining parameters") 
{ 
    SqlCommand _command = new SqlCommand("dbo.UploadAssignment"); 
    _command.CommandType = CommandType.StoredProcedure; 
    _command.Parameters.Add(new SqlParameter { ParameterName = "studentId",SqlDbType = SqlDbType.Int, Value = sectionId}); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "guid", SqlDbType = SqlDbType.Int, Value = guid }); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "originalfilename", SqlDbType = SqlDbType.Int, Value = originalfilename }); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "uploaddate", SqlDbType = SqlDbType.Int, Value = uploaddate }); 
} 

Answer 1

的official documentation状态：

参数名称的格式为@paramname。

因此，您需要在参数名称中包含@。除此之外，你只需要在相关的参数传递，就像你到任何其他的功能，如：

public virtual IEnumerable<T> GetUploadStudentSubmission<T>(
    int studentId, Guid guid, string originalfilename, DateTime uploaddate) 
{ 
    SqlCommand _command = new SqlCommand("dbo.UploadAssignment"); 
    _command.CommandType = CommandType.StoredProcedure; 
    _command.Parameters.Add(new SqlParameter { ParameterName = "@studentId",SqlDbType = SqlDbType.Int, Value = sectionId}); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "@guid", SqlDbType = SqlDbType.UniqueIdentifier, Value = guid }); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "@originalfilename", SqlDbType = SqlDbType.NVarChar, Value = originalfilename }); 
    _command.Parameters.Add(new SqlParameter { ParameterName = "@uploaddate", SqlDbType = SqlDbType.DateTime, Value = uploaddate }); 
} 

Answer 2

public virtual IEnumerable<T> GetUploadStudentSubmission<T>(int studentId, Guid guid, string originalfilename, DateTime uploaddate) 
{ 
    SqlCommand _command = new SqlCommand("dbo.UploadAssignment"); 
    _command.CommandType = CommandType.StoredProcedure; 
    _command.Parameters.AddWithValue("@studentId",sectionId); 
    _command.Parameters.AddWithValue("@guid", guid); 
    _command.Parameters.AddWithValue("@originalfilename", originalfilename); 
    _command.Parameters.AddWithValue("@uploaddate", uploaddate); 
} 

Answer 3

您也可以使用下面的代码：

public virtual IEnumerable<T> GetUploadStudentSubmission<T>(int studentId, Guid guid, string originalfilename, DateTime uploaddate) 
{ 
    var command = Database.GetStoredProcCommand("[dbo].[UploadAssignment]"); 
    Database.AddInParameter(command, "studentId", DbType.Int32, studentId); 
    Database.AddInParameter(command, "guid", DbType.Guid, guid); 
    Database.AddInParameter(command, "originalfilename", DbType.String, originalfilename); 
    Database.AddInParameter(command, "uploaddate", DbType.DateTime, uploaddate); 

    var reader = Database.ExecuteReader(command); 
    commandText = command.CommandAsSql(); 
    reader.Close(); 
} 

Answer 4

微软还提供了伟大的企业库，除了其他东西包含一个DataAccess块和处理参数。

看到这个答案更多细节https://stackoverflow.com/a/3038469/69433