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我試圖填充DropDownlist,但它似乎並沒有填充,我不知道爲什麼它不是。我能否得到第二雙眼睛來幫助我弄清楚我的錯在哪裏? 以下是我的代碼:試圖通過LINQ到C中的實體填充下拉列表#
private testhousingEntities1 canceldb = new testhousingEntities1();
/*=================================================*/
/*load form */
/*=================================================*/
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
InitializeForm();
}
}
/*================================================*/
/* */
/*================================================*/
private void InitializeForm()
{
var version = (from v in canceldb.CancellationVersions
where v.Active
select v).FirstOrDefault();
/*populating states and countries drop downlist */
FormHelpers.GenerateStates(ddlState);
FormHelpers.GenerateCountries(ddlCountry);
/*populating drop downlist */
semesterList();
}
/*=================================================*/
/*populating the Semester drop downlist */
/*=================================================*/
private void semesterList()
{
ddlSemester.Items.Insert(0, new ListItem("---------", "000"));
var semester = from s in canceldb.cancellationsemesters
select new {
cid= s.id, cSemester = s.Semester,
};
ddlSemester.DataSource = semester;
ddlSemester.DataTextField = "cSemester";
ddlSemester.DataValueField = "cid";
ddlSemester.DataBind();
}
/*=================================================*/
/*populating the Semester drop downlist */
/*=================================================*/
protected void ddlSemester_SelectedIndexChanged(object sender, EventArgs e)
{
if (!IsPostBack)
{
semesterList();
}
}
這沒有做任何事情。它拿出了「-----」作爲實際列表中的第一項。但是名單仍然是空的 – Paradigm
試着把它分解成一個類。 {cid = s.id,cSemester = s.Semester} 它可能不喜歡綁定到匿名類。 – user959729
匿名對象在這種情況下是正確的。見例如http://brandonatkinson.blogspot.cz/2011/03/populating-aspnet-dropdownlist-control.html – mipe34