String ch="chvVXMSF1BzwcdoDe899FfSxnhSrmxrr219T6Uvjv7MjryZE5QSx69RqVW7LmyFVf5A%252FBZyCnxsyrqWDOo2RES19t26JNGOlG03UlbOSR3yxlbHWECnPLg5bXpr%252FfMZaGS2NHacsJznm2DQFfN0uXe%252FijyaS4oZ7jNVxjy8PhKDfaDLi2VGCYD8TOnHidi%252F0hh5sYI%252BR0BwyASonEHaI50MW4Hn5vYuuenXGMINDjnfyJQrSFxEbvSK5lTu%252FAHzdgnM8r%252Fl5HR%252Bg7Sdf3IAwOhy6vUavctKTb1Lv3LbG%252BUKwawe0ykGKmpLSPn3AVhQpe9OgNkXR2FzTuUHLmQFkGkdPFb1VhGTyJWbK0TSLITAuCtSUL%252B%252F%252BexPE6ZFYoSZVrH3m1AWrNh4%3d";
this.lbtest.text= HttpUtility.UrlDecode(ch.ToString());
被转换过来的字符:ch="chvVXMSF1BzwcdoDe899FfSxnhSrmxrr219T6Uvjv7MjryZE5QSx69RqVW7LmyFVf5A/BZyCnxsyrqWDOo2RES19t26JNGOlG03UlbOSR3yxlbHWECnPLg5bXpr/fMZaGS2NHacsJznm2DQFfN0uXe/ijyaS4oZ7jNVxjy8PhKDfaDLi2VGCYD8TOnHidi/0hh5sYI+R0BwyASonEHaI50MW4Hn5vYuuenXGMINDjnfyJQrSFxEbvSK5lTu/AHzdgnM8r/l5HR+g7Sdf3IAwOhy6vUavctKTb1Lv3LbG+UKwawe0ykGKmpLSPn3AVhQpe9OgNkXR2FzTuUHLmQFkGkdPFb1VhGTyJWbK0TSLITAuCtSUL+/+exPE6ZFYoSZVrH3m1AWrNh4=";
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