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我创建了显示文章的自定义页面，我添加了可以选择排序顺序的下拉菜单，还实现了自定义分页。这是代码

var sortOrder = new List<string> {"Title", "Date", "Author"};

if (!IsPostBack)
{
    sortOrderDropDownList.DataSource = sortOrder;
    sortOrderDropDownList.DataBind();
}

articles = articles.OrderBy(a => a.Heading).ToList();

if (IsPostBack)
{
    switch (sortOrderDropDownList.SelectedItem.Value)
    {
       case "Date":
           articles = articles.OrderByDescending(a => a.StartDate).ToList();
           break;
       case "Author":
           articles = articles.OrderBy(a => a.AuthorComment).ToList();
           break;
       default:
          articles = articles.OrderBy(a => a.Heading).ToList();
          break;
     }
}

this.ArticleRepeater.DataSource = articles;

if (articles.Count > 10)
{
     int count = articles.Count - (number - 1) * 10 >= 10 ? 10 : articles.Count - (number - 1) * 10 - 1;
     this.ArticleRepeater.DataSource = articles.GetRange((number - 1) * 10, count);
     StringBuilder stringBuilder = new StringBuilder();
     if (number > 1)
     {
        stringBuilder.AppendFormat("<a href='{0}?page={1} '>&lt; Prev</a>  |  ", Request.Url.AbsolutePath, (number - 1));
        stringBuilder.AppendFormat("<b>Page {0}</b>", number);
        if (articles.Count > number * 10)
            stringBuilder.AppendFormat("  |  <a href='{0}?page={1}'>Next &gt;</a>", Request.Url.AbsolutePath, (number + 1));

        this.ArticlePaginator.Text = string.Format("<div class='ArticleListPagination'>{0}</div>", stringBuilder);
      }

      this.ArticleRepeater.DataBind();
}

我添加autoPostBack ='true'到下拉列表中，然后我从中选择dropdown，我的文章已排序，但是dropdown当我转到下一页时，从中选择的值不会保存（因为我每次创建页面时都会创建下拉列表）如何将dropdown值保存到视图状态？我也设置EnableViewState="True" ViewStateMode="Enabled"了下拉

4

1 回答 1

1

ViewState保存在页面正文中，因此当您转到不同的页面时，ViewState会创建新的页面。要在不同页面之间保存值，请使用Session,Cookies或QueryString。

于 2013-10-18T09:24:46.380 回答