you are implementing an asp net page that includes the following drop..., Appendix, ASP.NET

Question:You are implementing an ASP.NET page that includes the following drop-down list.

<asp:PlaceHolder ID="dynamicControls" runat="server">
    <asp:DropDownList ID="MyDropDown" runat="server">
        <asp:ListItem Text="abc" value="abc" />
        <asp:ListItem Text="def" value="def" />
    </asp:DropDownList>
</asp:PlaceHolder>

You need to dynamically add values to the end of the drop-down list.
What should you do?

A Add the following OnPreRender event handler to the asp:DropDownList

protected void MyDropDown_PreRender(object sender, EventArgs e)
{
    DropDownList ddl = sender as DropDownList;
    Label lbl = new Label();
    lbl.Text = "Option";
    lbl.ID = "Option";
    ddl.Controls.Add(lbl);
} 
B Add the following OnPreRender event handler to the asp:DropDownList

protected void MyDropDown_PreRender(object sender, EventArgs e)
{
    DropDownList ddl = sender as DropDownList;
    ddl.Items.Add("Option");
} 
C Add the following event handler to the page code-behind.

protected void Page_LoadComplete(object sender, EventArgs e)
{
    DropDownList ddl = Page.FindControl("MyDropDown") as DropDownList;
    Label lbl = new Label();
    lbl.Text = "Option";
    lbl.ID = "Option";
    ddl.Controls.Add(lbl);
} 
D Add the following event handler to the page code-behind.

protected void Page_LoadComplete(object sender, EventArgs e)
{
    DropDownList ddl = Page.FindControl("MyDropDown") as DropDownList;
    ddl.Items.Add("Option");
}

/29

+ AnswerB

+ Report

Descriptive on Appendix Ebook

Total Preview: 860

A Add the following OnPreRender event handler to the asp:DropDownList protected void MyDropDown_PreRender(object sender, EventArgs e) { DropDownList ddl = sender as DropDownList; Label lbl = new Label(); lbl.Text = "Option"; lbl.ID = "Option"; ddl.Controls.Add(lbl); }

B Add the following OnPreRender event handler to the asp:DropDownList protected void MyDropDown_PreRender(object sender, EventArgs e) { DropDownList ddl = sender as DropDownList; ddl.Items.Add("Option"); }

C Add the following event handler to the page code-behind. protected void Page_LoadComplete(object sender, EventArgs e) { DropDownList ddl = Page.FindControl("MyDropDown") as DropDownList; Label lbl = new Label(); lbl.Text = "Option"; lbl.ID = "Option"; ddl.Controls.Add(lbl); }

D Add the following event handler to the page code-behind. protected void Page_LoadComplete(object sender, EventArgs e) { DropDownList ddl = Page.FindControl("MyDropDown") as DropDownList; ddl.Items.Add("Option"); }

B