Question

选择查询时

select * from Permissions where AppId='yZVwUoxKQCu'  FOR JSON PATH,INCLUDE_NULL_VALUES

在sql server中执行命令，直接使用数组包装返回完整数据，而没有意外结束。当在C＃中使用DataReader读取查询时，同一查询结果将出现意外结束。 sql使用下面的方法执行。

这样查询

var sql = $"select * from Permissions where AppId='{AppId}'  FOR JSON PATH,INCLUDE_NULL_VALUES";
            var res = Connection.ExecuteScalarCommand(sql);

 public static String ExecuteScalarCommand(string sql)
        {
            string CS = DbConnectionString;
            SqlConnection con = new SqlConnection(CS);
            string val = "";
            try
            {

                con.Open();
                SqlCommand cmd = new SqlCommand(sql, con);
                val = cmd.ExecuteScalar().ToString();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message.ToString());
            }
            finally
            {
                con.Close();
            }
            return val;

        }

sql server direct给出的输出已给出。其预期输出。

[{"Id":49,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Season","UserId":60,"PermissionTitleId":1,"AppId":"yZVwUoxKQCu"},{"Id":50,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Categories","UserId":60,"PermissionTitleId":2,"AppId":"yZVwUoxKQCu"},{"Id":51,"IsCreatable":2,"IsViewable":2,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Tabs","UserId":60,"PermissionTitleId":3,"AppId":"yZVwUoxKQCu"},{"Id":52,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Fields","UserId":60,"PermissionTitleId":4,"AppId":"yZVwUoxKQCu"},{"Id":53,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"ContentBlock","UserId":60,"PermissionTitleId":5,"AppId":"yZVwUoxKQCu"},{"Id":54,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"User","UserId":60,"PermissionTitleId":6,"AppId":"yZVwUoxKQCu"},{"Id":55,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Roles","UserId":60,"PermissionTitleId":7,"AppId":"yZVwUoxKQCu"},{"Id":56,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Season","UserId":60,"PermissionTitleId":1,"AppId":"yZVwUoxKQCu"},{"Id":57,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Categories","UserId":60,"PermissionTitleId":2,"AppId":"yZVwUoxKQCu"},{"Id":58,"IsCreatable":2,"IsViewable":2,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Tabs","UserId":60,"PermissionTitleId":3,"AppId":"yZVwUoxKQCu"},{"Id":59,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Fields","UserId":60,"PermissionTitleId":4,"AppId":"yZVwUoxKQCu"},{"Id":60,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"ContentBlock","UserId":60,"PermissionTitleId":5,"AppId":"yZVwUoxKQCu"},{"Id":61,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"User","UserId":60,"PermissionTitleId":6,"AppId":"yZVwUoxKQCu"},{"Id":62,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Roles","UserId":60,"PermissionTitleId":7,"AppId":"yZVwUoxKQCu"},{"Id":42,"IsCreatable":0,"IsViewable":0,"IsDeletable":1,"IsUpdatable":0,"RoleId":28,"Title":"Season","UserId":60,"PermissionTitleId":1,"AppId":"yZVwUoxKQCu"},{"Id":43,"IsCreatable":1,"IsViewable":0,"IsDeletable":1,"IsUpdatable":1,"RoleId":28,"Title":"Categories","UserId":60,"PermissionTitleId":2,"AppId":"yZVwUoxKQCu"},{"Id":44,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":28,"Title":"Tabs","UserId":60,"PermissionTitleId":3,"AppId":"yZVwUoxKQCu"},{"Id":45,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":28,"Title":"Fields","UserId":60,"PermissionTitleId":4,"AppId":"yZVwUoxKQCu"},{"Id":46,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":28,"Title":"ContentBlock","UserId":60,"PermissionTitleId":5,"AppId":"yZVwUoxKQCu"},{"Id":47,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":28,"Title":"User","UserId":60,"PermissionTitleId":6,"AppId":"yZVwUoxKQCu"},{"Id":48,"IsCreatable":0,"IsViewable":0,"IsDeletable":1,"IsUpdatable":0,"RoleId":28,"Title":"Roles","UserId":60,"PermissionTitleId":7,"AppId":"yZVwUoxKQCu"}]

但是从asp.net核心输出的是

[{"Id":49,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Season","UserId":60,"PermissionTitleId":1,"AppId":"yZVwUoxKQCu"},{"Id":50,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Categories","UserId":60,"PermissionTitleId":2,"AppId":"yZVwUoxKQCu"},{"Id":51,"IsCreatable":2,"IsViewable":2,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Tabs","UserId":60,"PermissionTitleId":3,"AppId":"yZVwUoxKQCu"},{"Id":52,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Fields","UserId":60,"PermissionTitleId":4,"AppId":"yZVwUoxKQCu"},{"Id":53,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"ContentBlock","UserId":60,"PermissionTitleId":5,"AppId":"yZVwUoxKQCu"},{"Id":54,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"User","UserId":60,"PermissionTitleId":6,"AppId":"yZVwUoxKQCu"},{"Id":55,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":29,"Title":"Roles","UserId":60,"PermissionTitleId":7,"AppId":"yZVwUoxKQCu"},{"Id":56,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Season","UserId":60,"PermissionTitleId":1,"AppId":"yZVwUoxKQCu"},{"Id":57,"IsCreatable":0,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Categories","UserId":60,"PermissionTitleId":2,"AppId":"yZVwUoxKQCu"},{"Id":58,"IsCreatable":2,"IsViewable":2,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Tabs","UserId":60,"PermissionTitleId":3,"AppId":"yZVwUoxKQCu"},{"Id":59,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"Fields","UserId":60,"PermissionTitleId":4,"AppId":"yZVwUoxKQCu"},{"Id":60,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"ContentBlock","UserId":60,"PermissionTitleId":5,"AppId":"yZVwUoxKQCu"},{"Id":61,"IsCreatable":1,"IsViewable":1,"IsDeletable":1,"IsUpdatable":1,"RoleId":30,"Title":"User","UserId":60,"PermissionT

Answer 1

ExecuteScalar有一个字符限制：

结果集中第一行的第一列，或者为null 如果结果集为空，则引用（Visual Basic中为Nothing）。返回最多2033个字符。

要解决此问题，您将需要使用其他功能，例如ExecuteReader。

JSON输入的意外结尾：asp.net核心

1 个答案: