2sxc-无法使用C＃变量

Question

I'm trying to use a 2sxc view to create some statistics with linq. However I can't seem to be able to call any c# var. Here's an example:

@{
    if (@Request.QueryString["ano"] == "" || @Request.QueryString["ano"] == null) {
        <p>ano not set, using current year (@DateTime.Now.Year)</p>
        var year = @DateTime.Now.Year;
        } else {
        <p>ano set (@Request.QueryString["ano"])</p>
        var year = @Request.QueryString["ano"];
    }

    var items = AsDynamic(App.Data["entity"]);
    items = items.Where(p => Convert.ToDateTime(p.data_a).Year == year);
}

This results in

error CS0103: The name 'year' does not exist in the current context

Am I doing something really stupid again?

Answer 1

You are declaring variable inside if statement and referencing it outside if
Now you can rewrite you code like this:

@{
    int year = 0;
    if (@Request.QueryString["ano"] == "" || @Request.QueryString["ano"] == null) {
        <p>ano not set, using current year (@DateTime.Now.Year)</p>
        year = @DateTime.Now.Year; // no "var" keyword here!
        } else {
        <p>ano set (@Request.QueryString["ano"])</p>
        year = int.Parse(Request.QueryString["ano"]);
    }

    var items = AsDynamic(App.Data["entity"]);
    items = items.Where(p => Convert.ToDateTime(p.data_a).Year == year);
}