[英]Passing stored procedure parameters in c# .net application
我有一個存儲過程,我將它連接到我的項目,我想知道如何傳遞不同的參數類型:
存儲過程:
[dbo].[UploadAssignment]
@studentId int
, @guid uniqueidentifier
, @originalfilename nvarchar(500)
, @uploaddate datetime
在我的項目中:
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 });
}
官方文件說明:
ParameterName以
@paramname
形式@paramname
。
因此,您需要在參數名稱中包含@
。 除此之外,您只需要傳遞相關參數,就像對待任何其他函數一樣,如下所示:
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 });
}
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);
}
您還可以使用以下代碼:
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();
}
Microsoft還提供了優秀的企業庫,除了其他東西之外,它還包含DataAccess塊並處理參數。
有關詳細信息,請參閱此答案https://stackoverflow.com/a/3038469/69433
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