تفاوت تبدیل ضمنی و صریح داده ها در SqlParameter

کد PHP:

CREATE PROCEDURE procName
@ID int,
@Name nvarchar(50),
@Image varbinary(max),
@Admin bit
AS
BEGIN
.
.
.
END
GO


کد PHP:

.
.
.
SqlParameter idParam = new SqlParameter("@ID", id);
SqlParameter nameParam = new SqlParameter("@Name", name);
SqlParameter identificationCardParam = new SqlParameter("@Image", image);
SqlParameter adminParam = new SqlParameter("@Admin", admin);
.
.
.


کد PHP:

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.
.
SqlParameter idParam = new SqlParameter("@ID", SqlDbType.Int);
idParam.Value = id;
SqlParameter nameParam = new SqlParameter("@Name", SqlDbType.NVarChar);
nameParam.Value = name;
SqlParameter imageParam = new SqlParameter("@Image", SqlDbType.VarBinary);
imageParam.Value = image;
SqlParameter adminParam = new SqlParameter("@Admin", SqlDbType.Bit);
adminParam.Value = admin;
.
.
.