如何在剃须刀页面中使用 Array.Contains？

Question

我目前在使用包含在 cshtml 文件中时遇到问题。我想检查 devgroup 是否包含 user.

@{ 
                                    string[] devgroup = { "55", "53", "75" };
                                    var devdisplay = "none";
                                    var user = ViewBag.IDEmployee;
                                    if (devgroup.Contains(user))
                                    {
                                        devdisplay = "block";
                                    }

                                }

我目前遇到编译错误。


Error   CS1929  'string[]' does not contain a definition for 'Contains' and the best extension method overload 'MemoryExtensions.Contains<T>(ReadOnlySpan<T>, T)' requires a receiver of type 'ReadOnlySpan<T>'

Answer 1

你在这种情况下列出如下

@{
        List<string> devgroup = new List<string>(){ "55", "53", "75" };
        var devdisplay = "none";
        var user = ViewBag.IDEmployee;
        if (devgroup.Contains(user))
        {
            devdisplay = "block";
        }

    }

或

@{
        List<string> devgroup = new List<string>(){ "55", "53", "75" };
        var devdisplay = "none";
        var user = ViewBag.IDEmployee;
        if (if (Array.Exists(devgroup,(i)=> i==user))
        {
            devdisplay = "block";
        }

    }

Answer 2

尝试使用：

if (devgroup.ToList().Any(d=>d==user))

或

if (devgroup.ToList().Contains(user))

如何在剃须刀页面中使用 Array.Contains？

How to use Array.Contains in razorpages?

c#

razor

asp.net-core