C# ASP.NET GridView,分页后启用/禁用按钮
我现在已经成功地实现了GridView,但是,像往常一样,整个ASP.NET生命周期的事情困扰着我。我不明白为什么这样不行。我已将GridView的OnPageIndexchange绑定为:C# ASP.NET GridView,分页后启用/禁用按钮,c#,asp.net,gridview,user-controls,pagination,C#,Asp.net,Gridview,User Controls,Pagination,我现在已经成功地实现了GridView,但是,像往常一样,整个ASP.NET生命周期的事情困扰着我。我不明白为什么这样不行。我已将GridView的OnPageIndexchange绑定为: protected void GridView_PageIndexChanged(object sender, EventArgs e) { // Enable/disable the previous/next buttons. LinkButton btnNextPage = (Link
protected void GridView_PageIndexChanged(object sender, EventArgs e)
{
// Enable/disable the previous/next buttons.
LinkButton btnNextPage = (LinkButton)gvTable.BottomPagerRow.FindControl("btnNextPage");
LinkButton btnPreviousPage = (LinkButton)gvTable.BottomPagerRow.FindControl("btnPreviousPage");
btnNextPage.Enabled = false;
btnPreviousPage.Enabled = false;
}
这是我的ASCX:
<asp:GridView ID="gvTable" runat="server" ShowHeader="true" PageSize="1"
AllowPaging="true" AllowSorting="true" DataSourceID="dsLinqActivities"
AutoGenerateColumns="false" OnRowDataBound="GridView_DataBound"
OnPageIndexChanged="GridView_PageIndexChanged">
<Columns>
<asp:BoundField DataField="Edited" HeaderText="Date" />
<asp:BoundField DataField="Status" HeaderText="Status" />
<asp:BoundField DataField="Activity" />
</Columns>
<PagerSettings Position="Bottom" Visible="true" />
<PagerStyle CssClass="pager" />
<PagerTemplate>
<asp:LinkButton ID="btnPreviousPage" class="navbtn prev left"
runat="server" CommandName="Page" CommandArgument="Prev">
<span>Newer activities</span></asp:LinkButton>
<asp:LinkButton ID="btnNextPage" class="navbtn next right"
runat="server" CommandName="Page" CommandArgument="Next">
<span>Older activities</span></asp:LinkButton>
</PagerTemplate>
</asp:GridView>
新活动
旧活动
我调试我的应用程序,看到代码正在运行,并且做了正确的事情,但是由于某些原因,当呈现控件时,这两个按钮始终处于启用状态。我做错了什么?如果我是你,我会在“GridView\u PageIndexChanged”方法中这样编码 编辑:您还可以尝试添加setter吗
set
{
gvTable.BottomPagerRow.FindControl("btnNextPage") as LinkButton =value;
}
编辑:好的,我的朋友,我终于想出了一个解决办法。可能不是很优雅,但它工作,我测试了它。有几件事需要注意:
1.我们有一个“Prev”和一个“Next”按钮,我们需要处理这些按钮的“OnCommand”事件,因为我们使用自己的寻呼机模板
2.我们必须在处理OnCommand事件后绑定数据
我有一个静态的列表
,我在GET期间用随机字符串(礼貌:)填充它,并将它们绑定到我的网格。您可以在这里替换自己的数据源。此外,我们必须在OnCommand事件中手动更改网格的页面索引
这是我的aspx/ascx网格
<asp:GridView ID="GridView1" runat="server" OnRowDataBound="GridView_DataBound"
AllowPaging="true" PagerSettings-Mode="NextPrevious" PagerSettings-Position="Bottom" PageSize="10"
OnPageIndexChanged="GridView_PageIndexChanged">
<PagerSettings Position="Bottom" Visible="true" />
<PagerStyle CssClass="pager" />
<PagerTemplate>
<asp:LinkButton ID="btnPreviousPage" OnCommand="ChangePage"
runat="server" CommandName="Prev" Text="prev">
</asp:LinkButton>
<asp:LinkButton ID="btnNextPage" OnCommand="ChangePage"
runat="server" CommandName="Next" Text="next">
</asp:LinkButton>
</PagerTemplate>
</asp:GridView>
这是代码背后
public partial class TestPage : System.Web.UI.Page
{
private static Random _random = new Random();
static List<string> lst = new List<string>();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
for (int i = 1; i <= 30; i++)
{
lst.Add(RandomString(i));
}
GridView1.DataSource = lst;
GridView1.DataBind();
SetPageNumbers();
}
}
private void SetPageNumbers()
{
if (GridView1.PageIndex == 0)
{
(GridView1.BottomPagerRow.FindControl("btnPreviousPage")as LinkButton).Enabled = false;
}
if(GridView1.PageIndex ==GridView1.PageCount-1)
{
(GridView1.BottomPagerRow.FindControl("btnNextPage") as LinkButton).Enabled = false;
}
}
protected void ChangePage(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "Prev":
GridView1.PageIndex = GridView1.PageIndex - 1;
break;
case "Next":
GridView1.PageIndex = GridView1.PageIndex + 1;
break;
}
GridView1.DataSource = lst;
GridView1.DataBind();
SetPageNumbers();
}
public static string RandomString(int size)
{
StringBuilder builder = new StringBuilder();
for (int i = 0; i < size; i++)
{
//26 letters in the alfabet, ascii + 65 for the capital letters
builder.Append(Convert.ToChar(Convert.ToInt32(Math.Floor(26 * _random.NextDouble() + 65))));
}
return builder.ToString();
}
}
公共部分类测试页:System.Web.UI.Page
{
私有静态随机_Random=新随机();
静态列表lst=新列表();
受保护的无效页面加载(对象发送方、事件参数e)
{
如果(!Page.IsPostBack)
{
对于(int i=1;i您的CSS是否有可能设置enabled属性
我在没有CSS的情况下复制了你的代码,对我来说效果很好
发布你的css怎么样?有趣,老实说,我没有尝试代码。我以前是按照我前面提到的方式设置的。试试吧?你能在前面发布代码吗(aspx/ascx)对于您的网格?让我看看。另外,在分页之后,您是否再次将数据绑定到网格?@Ram:我只显式地将GridView数据绑定一次,这是在OnLoad
(如果!IsPostBack
)。我在问题中添加了ascx
。非常感谢,Ram,我会给您10次“接受”如果我能为这一巨大的努力。遗憾的是,我们似乎无法解决OnPageIndexchange的问题。:(对不起,但我肯定CSS不是这里的问题。
public partial class TestPage : System.Web.UI.Page
{
private static Random _random = new Random();
static List<string> lst = new List<string>();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
for (int i = 1; i <= 30; i++)
{
lst.Add(RandomString(i));
}
GridView1.DataSource = lst;
GridView1.DataBind();
SetPageNumbers();
}
}
private void SetPageNumbers()
{
if (GridView1.PageIndex == 0)
{
(GridView1.BottomPagerRow.FindControl("btnPreviousPage")as LinkButton).Enabled = false;
}
if(GridView1.PageIndex ==GridView1.PageCount-1)
{
(GridView1.BottomPagerRow.FindControl("btnNextPage") as LinkButton).Enabled = false;
}
}
protected void ChangePage(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "Prev":
GridView1.PageIndex = GridView1.PageIndex - 1;
break;
case "Next":
GridView1.PageIndex = GridView1.PageIndex + 1;
break;
}
GridView1.DataSource = lst;
GridView1.DataBind();
SetPageNumbers();
}
public static string RandomString(int size)
{
StringBuilder builder = new StringBuilder();
for (int i = 0; i < size; i++)
{
//26 letters in the alfabet, ascii + 65 for the capital letters
builder.Append(Convert.ToChar(Convert.ToInt32(Math.Floor(26 * _random.NextDouble() + 65))));
}
return builder.ToString();
}
}