C#操作Nvarchar(max)

 public bool AddMax()
 {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into tb_MaxTest(");
            strSql.Append("id,text) values(@id,@text);");

            SqlParameter[] parameters = new SqlParameter[]
            { 
                new SqlParameter("@id",SqlDbType.VarChar,50),
                new SqlParameter("@text",SqlDbType.NVarChar,-1)
            };
            parameters[0].Value = "111";
            parameters[1].Value = "写stored procedure时候，如果有参数的type是nvarchar(max)在.Net端设定size时候要设为-1 举例：如果有个参数@Message数据型态是nvarchar(max)，在程序端撰写时需写成：new SqlParameter(\"@Message\",SqlDbType.NVarChar,-1)";
            int row = DbHelperSQL.ExecuteSql(@"server=CNPVG-SQLVM\TESTER;Initial Catalog=DMS_Quotation;Pwd=Welcome88;Uid=sqlAdmin;",strSql.ToString(),parameters);
            return row > 0;
        }