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我有模型來表示用戶。我創建了一個幫助器類來返回一組這些用戶,如List(Of Users)
。如何將List(Of <Model>)作爲SelectListItems傳遞給DropDownList HTML Helper?
這裏是我該怎麼辦
Function getDoctorsList() As List(Of Users)
Dim userCollection As New List(Of Users)
Dim sql = "SELECT * FROM " + _tblName + " WHERE usertype = 'doctor'"
Dim dr As SqlDataReader = dbHelper.ExecuteAndGetReader(sql)
While dr.Read
Dim user As New Users
user.Id = IIf(IsDBNull(dr("id")), 0, dr("id"))
user.UserName = IIf(IsDBNull(dr("username")), "", dr("username"))
user.UserNin = IIf(IsDBNull(dr("user_nin")), 0, dr("user_nin"))
user.UserType = IIf(IsDBNull(dr("usertype")), "", dr("usertype"))
user.Password = IIf(IsDBNull(dr("password")), "", dr("password"))
userCollection.Add(user)
End While
Return userCollection
End Function
我抓住他們,並把他們從控制器這樣的查看到:
ViewData("LoginUserModel") = New LoginUser
ViewData("doctorList") = usersHelper.getDoctorsList
現在,模型有兩個屬性Id
和UserName
我希望分別用作值和文本。
我試過這樣的事情,但是這給了類型轉換的問題。所以我顯然做錯了。
<%= Html.DropDownList("doctors", ViewData("doctorList")) %>
如何將List作爲SelectListItems傳遞給DropDownList?