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关于mvc中@Html.DropDownListFor和@Html.DropDownList默认值无法选中问题简单总结
- PHP中文网Original
- 2017-03-29 16:16:361378browse
当我们在做类似编辑功能的时候，会给定select选中默认值，然而mvc中偶尔这个功能不能用，或者是强类型的@Html.DropDownListFor不能用。凑巧今天遇到问题，解决问题时发现了mvc的一个小bug，做记录如下：
后台无论用viewbag或是viewdata都不是重点，前台无论用@Html.DropDownList @Html.DropDownListFor都无所谓
重点是当后台用ViewData["typeBtnList"]=..... 或者ViewBag.typeBtnList =......前台用
@Html.DropDownList("typeBtnList", ViewData["typeBtnList"] as List@Html.DropDownList("typeBtnList", ViewBag.typeBtnList as List而当我们把前台改成
@Html.DropDownList("aaaaa", ViewData["typeBtnList"] as List@Html.DropDownList("aaaaa", ViewBag.typeBtnList as List结论：
参数命名很重要，因为看不到源码，故猜测问题便是名称问题
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