从url值导航gridview页面

Question

我有一个启用了分页的数据库驱动的gridview.一切正常,并在page_load上绑定如下:

sqldataadapter da = new saldatadapter("sql query"), con);
datatable dt = new datatable();
gridview1.datasource = dt;
gridview1.databind();

是否有一个选项,我可以启用页面号自动出现在网址中？我想这样做的原因是我可以通过电子邮件发送带有页码的URL,然后当用户点击该URL时,它会使gridview显示来自正确页面的数据.

更新2 - 请求的当前完整代码:

public partial class conflict_search_Default : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {

            if (Request.QueryString["page"] != null)
            {

                int index = int.Parse(Request.QueryString["page"]);
                GridView1.PageIndex = index;
                BindData();


            }
            else
            {

                BindData();

            }

        }
        else
        {

            BindData();

        }
    }

    private void BindData()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["connString"]);
        SqlDataAdapter da = new SqlDataAdapter("sql query here which returns over 100 pages", con);

        DataTable dt = new DataTable();
        da.Fill(dt);

        GridView1.DataSource = dt;

        GridView1.DataBind();
    }

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        int index = e.NewPageIndex + 1;
        string url = HttpContext.Current.Request.Url.AbsoluteUri;
        e.Cancel = true;

        Response.Redirect(string.Format("{0}?page={1}", url, index));
    }

    protected void GridView1_PageIndexChanged(object sender, EventArgs e)
    {
        BindData();
    }
}

当我尝试单击datagrid底部的分页号时,这会给我一个错误.错误如下:

如果我加载页面新鲜,它将加载.如果我然后单击第5页,它会显示?page=5在我期望的URL中,但出于某种原因,在屏幕底部的分页编号上选择了第6页.如果我然后单击第10页,例如,url更改?page=5?page=10为明显错误,这会给出错误:

Input string was not in a correct format. 
int index = int.Parse(Request.QueryString["page"]);

Answer 1

使用:

protected void GridView1_PageIndexChanging(Object sender, GridViewPageEventArgs e)
{
    int index = e.NewPageIndex + 1;
    string url = HttpContext.Current.Request.Url.AbsoluteUri;
    e.Cancel;

    Response.Redirect(string.Format("{0}?page={1}", url, index));
}

PageLoad(...)
{
    if (!Page.IsPostBack)
    {
          if (Request.QueryString["page"] != null)
          {
              int index = int.Parse(Request.QueryString["page"]);
              // bind your gridview
             GridView1.PageIndex = index;
          }
    }
}

来自GridView分页和使用url参数排序

Answer 2

如果您更改函数 GridView1_PageIndexChanging 中的代码，如下所示，一切都会起作用：

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
   e.Cancel = true;
   int index = e.NewPageIndex;
   string urlPath =  HttpContext.Current.Request.Url.AbsoluteUri;
   Uri uri = new Uri(urlPath);
   string url = uri.GetLeftPart(UriPartial.Path);
   Response.Redirect(string.Format("{0}?page={1}", url, index));
}

您也不需要处理GridView1_PageIndexChanged事件。