如果我通过搜索，然后转到第 3 页的资源（查看链接），然后在浏览器上点击“返回”，它只会再次返回搜索的第一页。
private void BindResourcesRepater()
{
string tag = Request.QueryString["tag"];
if (String.IsNullOrEmpty(tag))
{
//Guid userID = Guid.Parse(Membership.GetUser(HttpContext.Current.User.Identity.Name).ProviderUserKey.ToString());
DataSet ds = new DataSet();
int selectedTopicID = Convert.ToInt32(ddlTopics.SelectedValue);
int selectedSkillID = Convert.ToInt32(ddlSkills.SelectedValue);
int selectedTypeID = Convert.ToInt32(ddlTypes.SelectedValue);
string keyword = txtbKeyword.Text.Trim();
int sortBy = Convert.ToInt32(ddlSortBy.SelectedValue);
ds = Resource.Search_Resource(selectedTopicID, selectedSkillID, selectedTypeID, keyword, sortBy);
PagedDataSource objPds = new PagedDataSource();
objPds.DataSource = ds.Tables[0].DefaultView;
objPds.AllowPaging = true;
objPds.PageSize = 6;
int curpage;
if (ViewState["Page"] != null)
{
curpage = Convert.ToInt32(ViewState["Page"]);
}
else
{
ViewState["Page"] = 1;
curpage = 1;
}
// Set the currentindex
objPds.CurrentPageIndex = curpage - 1;
rp_resList.DataSource = objPds;
rp_resList.DataBind();
if (rp_resList.Items.Count == 0)
{
lnkNext.Visible = false;
if (Convert.ToInt32(ViewState["Page"]) == 1)
{
lnkPrev.Visible = false;
}
else
{
lnkNext.Visible = false;
}
}
else
{
lnkNext.Visible = true;
if (rp_resList.Items.Count < objPds.PageSize)
{
lnkNext.Visible = false;
}
if (Convert.ToInt32(ViewState["Page"]) == 1)
{
lnkPrev.Visible = false;
}
else
{
lnkPrev.Visible = true;
}
}
int numberOfItems = ds.Tables[0].Rows.Count;
lbl_totalResult.Text = GetCurrentVisibleItemsText(numberOfItems, objPds.PageSize, objPds.CurrentPageIndex);
}
else
{
DataSet ds = new DataSet();
int selectedTopicID = Convert.ToInt32(ddlTopics.SelectedValue);
int selectedSkillID = Convert.ToInt32(ddlSkills.SelectedValue);
int selectedTypeID = Convert.ToInt32(ddlTypes.SelectedValue);
txtbKeyword.Text = tag;
string keyword = tag.ToString();
int sortBy = Convert.ToInt32(ddlSortBy.SelectedValue);
ds = Resource.Search_Resource(selectedTopicID, selectedSkillID, selectedTypeID, tag, sortBy);
rp_resList.DataSource = ds.Tables[0];
rp_resList.DataBind();
}
}
protected void lnkNext_Click(object sender, EventArgs e)
{
// Set viewstate variable to the next page
ViewState["Page"] = Convert.ToInt32(ViewState["Page"]) + 1;
// reload the control
BindResourcesRepater();
}
protected void lnkPrev_Click(object sender, EventArgs e)
{
if (Convert.ToInt32(ViewState["Page"]) > 1)
{
// Set viewstate variable to the previous page
ViewState["Page"] = Convert.ToInt32(ViewState["Page"]) - 1;
// reload the control
}
BindResourcesRepater();
}