MVC 3：在 ActionLink 上附加获取参数

发布于 2024-11-28 19:42:27 字数 474 浏览 0 评论 0原文

我正在使用 MVCContrib 网格输出一些数据。当我对列进行排序时，我得到一个可能如下所示的网址：

/?Column=ColumnName&Direction=Ascending

假设我想添加链接来控制显示的结果数量。我会自发地写出这样的内容：

Html.ActionLink("View 10", "Index", new { pageSize = 10 })

...这会给我：

/?PageSize=10

但是假设我已经对网格进行了排序。在这种情况下，我想保存 url 参数，使新的 url 看起来像这样：

/?Column=ColumnName&Direction=Ascending&PageSize=10

如何完成此操作？

原文

I'm using the MVCContrib grid to output some data. When I sort a column, I get a url which may look like this:

/?Column=ColumnName&Direction=Ascending

Lets say I want to add links to control how many results are being shown. Spontaneously I would write something like this:

Html.ActionLink("View 10", "Index", new { pageSize = 10 })

... which would give me:

/?PageSize=10

But say I already sorted the grid. In that case I want to save the url parameters, making the new url look something like this:

/?Column=ColumnName&Direction=Ascending&PageSize=10

How can accomplish this?

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下雨或天晴 2024-12-05 19:42:27

您可以在生成链接时包含这些其他参数：

Html.ActionLink(
    "View 10", 
    "Index", 
    new {
        Column = Request["Column"],
        Direction = Request["Direction"],
        pageSize = 10 
    }
)

或者编写一个自定义 html 帮助程序，它将自动包含所有当前查询字符串参数并附加 pageSize 参数：

Html.PaginateLink("View 10", 10)

该帮助程序如下所示：

public static class HtmlExtensions
{
    public static MvcHtmlString PaginateLink(
        this HtmlHelper helper, 
        string linkText, 
        int pageSize
    )
    {
        var query = helper.ViewContext.HttpContext.Request.QueryString;
        var values = query.AllKeys.ToDictionary(key => key, key => (object)query[key]);
        values["pageSize"] = pageSize;
        var routeValues = new RouteValueDictionary(values);
        return helper.ActionLink(linkText, "Index", routeValues);
    }
}

You could include those other parameters when generating the link:

Html.ActionLink(
    "View 10", 
    "Index", 
    new {
        Column = Request["Column"],
        Direction = Request["Direction"],
        pageSize = 10 
    }
)

or write a custom html helper which will automatically include all current query string parameters and append the pageSize parameter:

Html.PaginateLink("View 10", 10)

and here's how the helper could look like:

public static class HtmlExtensions
{
    public static MvcHtmlString PaginateLink(
        this HtmlHelper helper, 
        string linkText, 
        int pageSize
    )
    {
        var query = helper.ViewContext.HttpContext.Request.QueryString;
        var values = query.AllKeys.ToDictionary(key => key, key => (object)query[key]);
        values["pageSize"] = pageSize;
        var routeValues = new RouteValueDictionary(values);
        return helper.ActionLink(linkText, "Index", routeValues);
    }
}

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