Listview Datapager - 索引超出范围。必须为非负且小于集合

Question

我使用列表视图来显示从数据库产品列表的大小。的onpage负载的产品得到正确加载，但是当我尝试使用DataPager的分页它给这个错误

指数超出范围切换页面。必须是非负数且小于集合的大小。参数名称：在System.Web.UI.WebControls.DataKeyArray.get_Item（Int32索引）上的System.Collections.ArrayList.get_Item（Int32索引）处的索引。在shop.products_temperatureBound（Object sender，ListViewItemEventArgs e）

Thing is if我使用ItemDataBound然后只有我得到这个错误。其他分页工作正常。

<asp:ListView ID="products" runat="server" DataKeyNames="ID" OnPagePropertiesChanging="OnPagePropertiesChanging"> 
          <ItemTemplate> 
           content 
          </ItemTemplate> 

          <LayoutTemplate> 
           <div id="itemPlaceholderContainer" runat="server" style=""> 
            <div runat="server" id="itemPlaceholder" /> 
           </div> 

           <div class="datapager"> 
            <asp:DataPager ID="DataPager1" ClientIDMode="Static" runat="server" PageSize="12" PagedControlID="products" ViewStateMode="Enabled"> 
             <Fields> 
              <asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="false" ShowPreviousPageButton="False" ShowNextPageButton="false" ButtonCssClass="nextPre" /> 
              <asp:NumericPagerField ButtonType="Link" ButtonCount="10" /> 

              <asp:NextPreviousPagerField ButtonType="Link" ShowNextPageButton="true" ShowLastPageButton="false" ShowPreviousPageButton="false" ButtonCssClass="nextPre" /> 
             </Fields> 
            </asp:DataPager> 
            <div class="clear"></div> 
           </div> 
          </LayoutTemplate> 

          <EmptyDataTemplate> 
           <strong>No Items Found....</strong> 
          </EmptyDataTemplate> 
         </asp:ListView> 

项数据绑定

private void products_ItemDataBound(object sender, ListViewItemEventArgs e) 
    { 
     try { 
      if (e.Item.ItemType == ListViewItemType.DataItem) { 
       ListViewDataItem itm = (ListViewDataItem)e.Item; 
       string productID = products.DataKeys(itm.DataItemIndex)("ID"); 
       query = "SELECT stock_status FROM products WHERE ID = '" + productID + "'"; 
       DataTable dt = this.GetData(query); 
       if (dt.Rows.Count > 0) { 
        ((Label)e.Item.FindControl("checkReadyStock")).Text = dt.Rows(0)("stock_status").ToString; 

        if (((Label)e.Item.FindControl("checkReadyStock")).Text == "Ready Stock") { 
         ((Image)e.Item.FindControl("readyStock")).Visible = true; 
        } 
       } 
      } 
     } catch (Exception ex) { 
      Response.Write(ex); 
     } 
    } 

DataPager的

protected void OnPagePropertiesChanging(object sender, PagePropertiesChangingEventArgs e) 
{ 
    (products.FindControl("DataPager1") as DataPager).SetPageProperties(e.StartRowIndex, e.MaximumRows, false); 
    products.DataSource = ViewState("Data"); 
    products.DataBind(); 
} 

Answer 1

你可以试试这个。您只需将“ColumnNameWithID”更改为正确的名称即可。

protected void products_ItemDataBound1(object sender, ListViewItemEventArgs e) 
{ 
    try 
    { 
     if (e.Item.ItemType == ListViewItemType.DataItem) 
     { 
      string productID = DataBinder.Eval(e.Item.DataItem, "ColumnNameWithID").ToString(); 
      string query = "SELECT stock_status FROM products WHERE ID = '" + productID + "'"; 
      DataTable dt = this.GetData(query); 
      if (dt.Rows.Count > 0) 
      { 
       ((Label)e.Item.FindControl("checkReadyStock")).Text = dt.Rows[0][2].ToString(); 
       if (((Label)e.Item.FindControl("checkReadyStock")).Text == "Ready Stock") 
       { 
        ((Image)e.Item.FindControl("readyStock")).Visible = true; 
       } 
      } 
     } 
    } 
    catch (Exception ex) 
    { 
     Response.Write(ex); 
    } 
}