如何使下一页显示为false？

Question

我是c＃asp.net网络表单的新手。这是我在aspx.cs中用于分页的PagedDataSource的代码：

//This property will contain the current page number 
public int PageNumber
{
    get
    {
        if (ViewState["PageNumber"] != null)
        {
            return Convert.ToInt32(ViewState["PageNumber"]);
        }
        else
        {
            return 0;
        }
    }
    set { ViewState["PageNumber"] = value; }
}

//Asp:ListView
private void BindRepeater()
{
    //ConnectionString for accessing into MSSql
    connector.ConnectionString = "SERVER=xbetasql,52292;UID=AutoTrakker;Password=trinidad2win;DATABASE=ATDBSQL;";

    //Get the values from id's
    string customer = (this.search.Value);
    string country = (this.Country.Value);
    string idcurrency = (this.Currency.Value);

    //Conditions for query
    if (country != "select")
    {
        if (idcurrency != "selected")
        {
            query = "select * from customer where country = '" + country + "' and idcurrency = '" + idcurrency + "'";
        }
        else
        {
            query = "select * from customer where country = '" + country + "'";
        }
    }
    else if (idcurrency != "selected")
    {
        query = "select * from customer where idcurrency = '" + idcurrency + "'";
    }
    else if ((this.search.Value) == customer)
    {
        query = "select * from customer where idcustomer = '" + customer + "'";
    }
    else if (customer == "")
    {
        Response.Write("<script>alert('No Id Inputted, Data Not Found.')</script>");
    }

    //DataSet and DataTable (get the data and display it into asp:repeater
    selectedData = connector.ExecuteQuery(query);
    dt = selectedData.Tables[0];

    //Set PageData Settings
    PagedDataSource pagedData = new PagedDataSource();
    pagedData.DataSource = dt.DefaultView;
    pagedData.AllowPaging = true;
    pagedData.PageSize = 2;
    pagedData.CurrentPageIndex = PageNumber;

    int vcnt = dt.DefaultView.Count / pagedData.PageSize;

    if (PageNumber == 1)
    {
        linkPrevious.Visible = false;
        linkNext.Visible = false;
    }
    else if (PageNumber < 1)
    {
        linkPrevious.Visible = false;
        linkNext.Visible = false;
    }
    else if (PageNumber > 0)
    {
        linkPrevious.Visible = true;
    }
    if (PageNumber >= vcnt)
    {
        linkNext.Visible = false;
    }
    else if(PageNumber < vcnt)
    {
        linkNext.Visible = true;
        linkPrevious.Visible = !pagedData.IsFirstPage;
    }

   //Binding the repeater 
   if (dt.Rows.Count > 0)
    {
        repeater.Visible = true;
        repeater.DataSource = pagedData;
        repeater.DataBind();
    }
    else
    {
        Response.Write("<script>alert('No Data Found.')</script>");
    }
}

protected void linkNext_Click(object sender, EventArgs e)
{
    linkNext.Visible = true;
    PageNumber += 1;
    BindRepeater();
}
protected void linkPrevious_Click(object sender, EventArgs e)
{
    linkPrevious.Visible = true;
    PageNumber -= 1;
    BindRepeater();
}

BindRepeater函数是我获取数据的pagenumber的地方。我的问题是我应该为我的PageNumber做什么条件才能使下一页不可见？当我搜索示例：Country（Aduanas）时，我搜索的国家/地区只有2个数据，但函数linkNext_Click即使只有2个数据，（）也可见。

以下是它的图像：

如何在PageNumber条件中看不到NextPage链接：

我应该添加什么条件才能使上一页中的nextpage显示为false？

if (PageNumber == 1)
{
    linkPrevious.Visible = false;
    linkNext.Visible = false;
}
else if (PageNumber < 1)
{
    linkPrevious.Visible = false;
    linkNext.Visible = false;
}
else if (PageNumber > 0)
{
    linkPrevious.Visible = true;
}
if (PageNumber >= vcnt)
{
    linkNext.Visible = false;
}
else if(PageNumber < vcnt)
{
    linkNext.Visible = true;
    linkPrevious.Visible = !pagedData.IsFirstPage;
}

Answer 1

知道了！在这种情况下：

else if(PageNumber < vcnt)
{
    //linkNext.Visible = true;
    // Change it to

    linkNext.Visible = !pagedData.IsLastPage;
    linkPrevious.Visible = !pagedData.IsFirstPage;
}