Asp.net MVC3 Razor语法小记

1.在MVC View中使用三元运算符的方式：@(bool?"":"")

2.在@{}中输出一行：@:<html>.如果这一行的上下文在程序代码中则用：@Html.Raw(string.Format(""));而不是Html.Raw();

3.Radio默认选中： @Html.RadioButtonFor(m => m.BookType, 0, new { @checked="checked"})小学

4.DropDownList添加非数据库数据项：

IEnumerable<SelectListItem> ColumnList = from a in Company.Column.ToList()

where a.parentID==0

select new SelectListItem

{

Value = a.ColumnID.ToString(),

Text = a.name

};

List<SelectListItem> Items = new List<SelectListItem>();

Items.Add(new SelectListItem { Value = "0", Text = "一级栏目" });

Items.AddRange(ColumnList);

ViewBag.ColumnList = Items;

。。。。

***直接使用后台ViewBag:
@Html.DropDownList("groupid", new SelectList((IEnumerable<SelectListItem>)ViewBag.GroupList, "groupid", "groupname"));

***添加静态数据项：

@Html.DropDownListFor(model => model.GroupCategoryID,new SelectListItem[] { new SelectListItem { Text = "小学", Value = "1" }, new SelectListItem { Text = "中学", Value = "2" } })

5.在页面中输出javascript变量值：

<script language="JavaScript" type="text/javascript">
        var teacher = @Html.Raw(HttpUtility.HtmlDecode(teacherStr.ToString()));

。。。。

6.使用@helper

@helper PrintTab(Tab tab, bool active)
{
    if(active)
    {
        <li class="active">
            <a href="@tab.Url">@tab.Text</a>

            @if(tab.Closable)
            {
                <span class="button-tab-close">×</span>

                using (Html.BeginForm("Close", "Tab", FormMethod.Post, new { id = "closeTab" }))
                {
                    @Html.Hidden("tabId", tab.TabId)
                }
            }
        </li>
    }
    else
    {
        <li>
            <a href="@tab.Url">@tab.Text</a>
        </li>
    }
}
@PrintTab(tab, (tab.TabId == Model.ActiveTab));