Winform实现登录窗体中记住密码的功能，模仿QQ登录记住密码的实现
用户名输入框我们采用下拉列表框ComboBox
密码框我们采用textBox，并设置为密码框
设置textBox输入时不显示明文，需要将useSystemPasswordChar改为true，然后multiline设置为false，然后重新生成一下就可以了，因为textbox为显示为密码字符是当textbox为单行编辑的时候，useSystemPasswordchar的设置才会生效，然后我们还可以通过passwordChar设置textbox中以哪种形式来显示你输入的字符，默认是”*”。
记住密码功能的常见实现方法有三种：
方法一：写入本地数据库
方法二：写入文件——txt、xml、ini
方法三：注册表
资源文件列表
Winform登陆记住密码/.vs/Winform登陆记住密码/v14/.suo , 56320
Winform登陆记住密码/Winform登陆记住密码.sln , 1042
Winform登陆记住密码/Winform登陆记住密码/App.config , 189
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/data.bin , 1699
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Data.v14.1.dll , 3489272
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Data.v14.1.xml , 1061142
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Printing.v14.1.Core.dll , 2534392
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Printing.v14.1.Core.xml , 901244
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Sparkline.v14.1.Core.dll , 74744
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Sparkline.v14.1.Core.xml , 21144
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Utils.v14.1.dll , 5187576
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.Utils.v14.1.xml , 558505
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.XtraEditors.v14.1.dll , 3495928
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/DevExpress.XtraEditors.v14.1.xml , 1562508
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/de/DevExpress.Data.v14.1.resources.dll , 171000
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/de/DevExpress.Printing.v14.1.Core.resources.dll , 12792
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/de/DevExpress.Sparkline.v14.1.Core.resources.dll , 11768
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/de/DevExpress.Utils.v14.1.resources.dll , 25592
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/de/DevExpress.XtraEditors.v14.1.resources.dll , 61944
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/es/DevExpress.Data.v14.1.resources.dll , 174584
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/es/DevExpress.Printing.v14.1.Core.resources.dll , 13304
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/es/DevExpress.Sparkline.v14.1.Core.resources.dll , 12280
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/es/DevExpress.Utils.v14.1.resources.dll , 26616
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/es/DevExpress.XtraEditors.v14.1.resources.dll , 71160
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ja/DevExpress.Data.v14.1.resources.dll , 177656
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ja/DevExpress.Printing.v14.1.Core.resources.dll , 12792
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ja/DevExpress.Sparkline.v14.1.Core.resources.dll , 11256
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ja/DevExpress.Utils.v14.1.resources.dll , 32248
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ja/DevExpress.XtraEditors.v14.1.resources.dll , 84472
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ru/DevExpress.Data.v14.1.resources.dll , 187896
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ru/DevExpress.Printing.v14.1.Core.resources.dll , 13816
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ru/DevExpress.Sparkline.v14.1.Core.resources.dll , 11768
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ru/DevExpress.Utils.v14.1.resources.dll , 28664
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/ru/DevExpress.XtraEditors.v14.1.resources.dll , 91128
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.exe , 64000
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.exe.config , 189
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.pdb , 30208
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.vshost.exe , 22696
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.vshost.exe.config , 189
Winform登陆记住密码/Winform登陆记住密码/bin/Debug/Winform登陆记住密码.vshost.exe.manifest , 490
Winform登陆记住密码/Winform登陆记住密码/frm_Login.cs , 4731
Winform登陆记住密码/Winform登陆记住密码/frm_Login.Designer.cs , 9189
Winform登陆记住密码/Winform登陆记住密码/frm_Login.resx , 5817
Winform登陆记住密码/Winform登陆记住密码/frm_Main.cs , 412
Winform登陆记住密码/Winform登陆记住密码/frm_Main.Designer.cs , 1435
Winform登陆记住密码/Winform登陆记住密码/frm_Main.resx , 5817
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/DesignTimeResolveAssemblyReferences.cache , 83114
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache , 8388
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs , 0
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs , 0
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs , 0
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/TempPE/Properties.Resources.Designer.cs.dll , 4096
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.csproj.FileListAbsolute.txt , 5066
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.csproj.GenerateResource.Cache , 1211
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.csprojResolveAssemblyReference.cache , 56232
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.exe , 64000
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.frm_Login.resources , 180
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.frm_Main.resources , 180
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.pdb , 30208
Winform登陆记住密码/Winform登陆记住密码/obj/Debug/Winform登陆记住密码.Properties.Resources.resources , 50311
Winform登陆记住密码/Winform登陆记住密码/Program.cs , 541
Winform登陆记住密码/Winform登陆记住密码/Properties/AssemblyInfo.cs , 1358
Winform登陆记住密码/Winform登陆记住密码/Properties/Resources.Designer.cs , 4390
Winform登陆记住密码/Winform登陆记住密码/Properties/Resources.resx , 6945
Winform登陆记住密码/Winform登陆记住密码/Properties/Settings.Designer.cs , 1112
Winform登陆记住密码/Winform登陆记住密码/Properties/Settings.settings , 249
Winform登陆记住密码/Winform登陆记住密码/Resources/close.png , 15351
Winform登陆记住密码/Winform登陆记住密码/Resources/Login - 1副本.png , 57054
Winform登陆记住密码/Winform登陆记住密码/Resources/Login.png , 57054
Winform登陆记住密码/Winform登陆记住密码/Resources/mini.png , 18211
Winform登陆记住密码/Winform登陆记住密码/Resources/未标题2.png , 16700
Winform登陆记住密码/Winform登陆记住密码/User.cs , 727
Winform登陆记住密码/Winform登陆记住密码/Winform登陆记住密码.csproj , 5414