加載所有數據到DropDownList

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讓說我的部門Product Department。我是誰登錄在system/project。可以先在DropDownList中加載我的部門？我第一次加載的意思是在加載下拉菜單時，我的部門被設置爲第一個。

控制器

ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentDesc", null).OrderBy(m => m.Text);

HTML

@Html.DropDownList("DepartmentId ", ViewData["DepartmentId "] as SelectList, "", new { @style = "width:130px;" })

2017-01-20 KiRa

只要你通過在視圖模型前設置property'DepartmentId'的值在GET方法，以及選項將被選擇 –

@StephenMuecke如何設置屬性值？ – KiRa

請參閱[這個答案]（http://stackoverflow.com/questions/41719293/mvc5-how-to-set-selectedvalue-in-dropdownlistfor-html-helper/41731685#41731685） –

如果你設置新的SelectList空，將所選選項。

ViewBag.DepartmentId = new SelectList(db.Departments.OrderBy(m => m.Text), "DepartmentId", "DepartmentDesc", selectedDepartmentId);

2017-01-20 15:43:13

試試這個代碼： -

ViewBag.DepartmentId = new SelectList(db.Departments, "DepartmentId", "DepartmentDesc",SelectedDepartmentId).OrderBy(m => m.Text);

而且

@Html.DropDownList("DepartmentId ", ViewData["DepartmentId "] as SelectList, "My Department", new { @style = "width:130px;" })

2017-01-20 17:22:23 manika

回答