GridView 觸發了未處理的事件 PageIndexChanging

Question

我已經允許分頁並添加了以下代碼，但出現錯誤。 有誰知道可能是什么問題？

代碼：

  protected void SubmitAppraisalGrid_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
    {
        SubmitAppraisalGrid.PageIndex = e.NewSelectedIndex;
        SubmitAppraisalGrid.DataBind();

    }

設計：

<asp:GridView ID="SubmitAppraisalGrid" runat="server" 
                AutoGenerateColumns="False" BorderWidth="0px" 
                onrowcreated="SubmitAppraisalGrid_RowCreated" ShowHeader="False" 
                style="margin-right: 0px" AllowPaging="True" PageSize="1" 
                onselectedindexchanging="SubmitAppraisalGrid_SelectedIndexChanging">
               </asp:GridView>

Answer 1

如果您已將 gridviews AllowPaging 屬性設置為“true”並且不處理PageIndexChanging事件，則會引發此錯誤。

要使用分頁，請將PageIndexChanging事件處理程序添加到網格並將標記和代碼更改為：

<asp:GridView ID="SubmitAppraisalGrid" runat="server" 
                AutoGenerateColumns="False" BorderWidth="0px" 
                onrowcreated="SubmitAppraisalGrid_RowCreated" ShowHeader="False" 
                style="margin-right: 0px" AllowPaging="True" PageSize="1" 
                onselectedindexchanging="SubmitAppraisalGrid_SelectedIndexChanging"
                OnPageIndexChanging="SubmitAppraisalGrid_PageIndexChanging">
               </asp:GridView>

///

protected void gvList_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    SubmitAppraisalGrid.PageIndex = e.NewPageIndex;
    SubmitAppraisalGrid.DataBind();

    //bindGrid(); 
    //SubmitAppraisalGrid.PageIndex = e.NewPageIndex;
    //SubmitAppraisalGrid.DataBind();
}

protected void SubmitAppraisalGrid_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
   /// you selected index related logic here.
}

以編程方式設置PageIndex屬性時不會引發此事件。 檢查GridView.PageIndexChanging 事件的MSDN 文檔

供參考：未處理的 GridView 觸發事件 PageIndexChanging

Answer 2

您的代碼應該在 On PageIndexChanging 事件中

  protected void SubmitAppraisalGrid_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        SubmitAppraisalGrid.PageIndex = e.NewPageIndex;
        SubmitAppraisalGrid.DataBind();
    }

設計：

<asp:GridView ID="SubmitAppraisalGrid" runat="server" 
            AutoGenerateColumns="False" BorderWidth="0px" 
            onrowcreated="SubmitAppraisalGrid_RowCreated" ShowHeader="False" 
            style="margin-right: 0px" AllowPaging="True" PageSize="1" 
            OnPageIndexChanging="SubmitAppraisalGrid_PageIndexChanging">
           </asp:GridView>

Answer 3

嘗試

OnPageIndexChanging="SubmitAppraisalGrid_PageIndexChanging"

代替

onselectedindexchanging="SubmitAppraisalGrid_SelectedIndexChanging"


protected void SubmitAppraisalGrid_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    SubmitAppraisalGrid.PageIndex = e.NewPageIndex;
    BindGrid();
}

Answer 4

一步步：

1. 從設計中選擇 gridview 並轉到屬性並觸發事件（PageIndexChanging）
2. 代碼： gridviewname.pageindex=e.NewPageIndex;

Answer 5

您需要從下拉列表的選定索引更改事件中調用 Pageindex 更改事件。

protected void PageDropDownList_SelectedIndexChanged(Object sender, EventArgs e)
{
     // Retrieve the pager row.
    GridViewRow pagerRow = SubmitAppraisalGrid.BottomPagerRow;

    // Retrieve the PageDropDownList DropDownList from the bottom pager row.
    DropDownList pageList = (DropDownList)pagerRow.Cells[0].FindControl("PageDropDownList");

    // Set the PageIndex property to display that page selected by the user.
    GridViewPageEventArgs evt = new GridViewPageEventArgs(pageList.SelectedIndex);
    SubmitAppraisalGrid_PageIndexChanging(sender, evt);
}

Answer 6

開始使用

SubmitAppraisalGrid.PageIndex = e.NewSelectedIndex;

你必須使用

SubmitAppraisalGrid.PageIndex = e.NewPageIndex;

如果您再次出現錯誤，請也發布錯誤..