Visual Studio 2019升級MVC5提示The name 'ViewBag' does not exist in the current context錯誤信息的解決辦吧
原來的項目是MVC4的，我就升級到MVC5但是可以編譯，就是會提示ViewBag的錯誤信息如下圖 在網上查找了一下，覺得應該是升級引起的，那麼修改Web.config就應該沒有問題了 首先是項目目錄下的web.config中的版本號紅色箭頭處 下圖中的版本是4.0.0.0 把這裏修改爲5.2.7.0 然後重新打開項目就ok了 下圖是正常後的效果
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