Listview Datapager-索引超出范围.必须是非负数并且小于集合的大小
本文关键字:小于 集合 是非 索引 Datapager- 范围 Listview | 更新日期: 2023-09-27 18:00:58
我正在使用Listview显示数据库中的产品列表。OnPageLoad产品可以正常加载,但当我尝试使用数据寻呼机分页切换页面时,会出现以下错误
索引超出范围。必须是非负数并且小于集合的大小。参数名称:shop.products_ItemDataBound(Object sender,ListViewItemEventArgs e(处System.Collections.ArrayList.get_Item(Int32索引(处的索引
问题是,如果我使用ItemDataBound,那么只有我会得到这个错误。否则分页效果良好。
<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>
项目数据绑定
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
protected void OnPagePropertiesChanging(object sender, PagePropertiesChangingEventArgs e)
{
(products.FindControl("DataPager1") as DataPager).SetPageProperties(e.StartRowIndex, e.MaximumRows, false);
products.DataSource = ViewState("Data");
products.DataBind();
}
你能试试这个吗。您只需要将"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);
}
}