在 ASP.NET CORE 中使用 SESSION

蔚落 2022-04-03 18:26 316阅读 0赞

**1、如果之前没有安装过Session依赖，则通过nuget控制台，安装session支持：**

Install-Package Microsoft.AspNetCore.Session

**2、打开Startup.cs文件**

2.1.在ConfigureServices方法里面添加：

services.AddSession();

2.2.在Configure方法里面添加：

app.UseSession();

2.3 修改配置，防止页面切换后session ID改变（默认是改变的，Seesion会失效）

services.Configure<CookiePolicyOptions>(options =>
                {
                    // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                    options.CheckConsentNeeded = context => false;//这里要改为false，默认是true，true的时候session无效
                    options.MinimumSameSitePolicy = SameSiteMode.None;
                });

**3、代码Demo：**

var username = "aaa";
                var bytes = System.Text.Encoding.UTF8.GetBytes(username);
                HttpContext.Session.Set("username", bytes);
    
                Byte[] bytesTemp;
                HttpContext.Session.TryGetValue("username", out bytesTemp);
                var usernameTemp = System.Text.Encoding.UTF8.GetString(bytesTemp);
    
                //扩展方法的使用
                HttpContext.Session.SetString("password", "111");
                var password = HttpContext.Session.GetString("password");
    
                string key_LoginTimes = "LoginTimes";
                int? loginTimes = HttpContext.Session.GetInt32(key_LoginTimes);
                if (loginTimes == null){
                    loginTimes = 1;
                }
                else
                {
                    loginTimes++;
                }
                HttpContext.Session.SetInt32(key_LoginTimes, loginTimes.Value);
                ViewData[key_LoginTimes] = loginTimes;