Question

我的网络表单上有2个下拉列表，第二个根据选择的值与第一个同步。

其中两个之间的一切都很好，并且能够使用它们中的值来执行我的功能。

然而，第一个下拉列表似乎对我的转发器和分页有影响。基本上它不断增加pageddatesource并清除任何数据的转发器？

SelectedIndexChanged仅用于更新update.panel1，其中第二个下拉列表是，但是我不确定它如何进一步增加页码并从转发器中删除数据？

以下是带有下拉列表的前端。

<section id="section-search">
<div class="fleft">
Start Date: 
<asp:TextBox runat="server" ID="txtStartDate" CssClass="txt txt-sml"></asp:TextBox>
  <ajaxToolkit:CalendarExtender ID="calStartDate" runat="server" PopupPosition="Right" Animated="true" TargetControlID="txtStartDate" />
End Date: 
<asp:TextBox runat="server" ID="txtEndDate" CssClass="txt txt-sml"></asp:TextBox>
  <ajaxToolkit:CalendarExtender runat="server" ID="calEndDate" PopupPosition="Right" Animated="true" TargetControlID="txtEndDate"></ajaxToolkit:CalendarExtender>
<hr />
Product Class:
<asp:DropDownList ID="drpProductClass" runat="server" Width="230px" OnSelectedIndexChanged="drpProductClass_SelectedIndexChanged" AutoPostBack="true" />
   <hr />
<asp:UpdatePanel ID="updatePanel1" runat="server" UpdateMode="Conditional">
  <ContentTemplate>
  Product:
    <asp:DropDownList ID="drpProduct" runat="server" Width="230px"  />
  </ContentTemplate>
</asp:UpdatePanel>
</div>
<div class="fright">
<asp:Button runat="server" ID="btnFilter" Text="Search" CssClass="submit" OnClick="btnFilter_Click"/>
</div>
</section>

<section id="section-title">
<h1>Order Search</h1><h2></h2>  
</section> 

<section class="info-strip tr">
<asp:Literal ID="litResults" runat="server"></asp:Literal>
</section>

<section class="track-table">

<asp:Literal runat="server" ID="litMessage" Visible="false" Text="<div class='wysiwyg'><p>You currently have no orders...</p></div>"></asp:Literal>

<asp:PlaceHolder runat="server" ID="phOrders">    
<%--<table>
  <thead>

  </thead>
  <tbody>--%>
    <asp:Repeater ID="rprOrders" runat="server" OnItemCommand="rprOrders_ItemCommand" >

这是我的代码

protected void SetupControl()
{
  if (this.StopProcessing)
  {
    // Do not process
  }
  else
  {
    if (CMSContext.ViewMode == ViewModeEnum.LiveSite)
    {      
      if(!Page.IsPostBack)
      {
        PopulateProductClass();
        PopulateProduct();
        PopulateOrders();
      }
    }
  }
}

protected void drpProductClass_SelectedIndexChanged(object sender, EventArgs e)
{
  CustomTableItemProvider ctip = new CustomTableItemProvider();

  UserInfo user = CooneenHelper.GetUserImpersonisationUser();
  QueryDataParameters qdp = new QueryDataParameters();
  qdp.Add("@UserID", user.UserID);
  DataSet ds = gc.ExecuteQuery("CN_GetEmpIDByUID", qdp, QueryTypeEnum.StoredProcedure, true);

  int emplID = Convert.ToInt32(ds.Tables[0].Rows[0]["UserEmployeeID"].ToString());

  if (drpProductClass.SelectedValue.ToString() != "0")
  {
    QueryDataParameters qdp2 = new QueryDataParameters();
    qdp2.Add("@WR_ClassID", Convert.ToInt32(drpProductClass.SelectedValue.ToString()));
    qdp2.Add("@UserEmployeeID", emplID);
    DataSet ds2 = gc.ExecuteQuery("CN_OrdersGetProductByClassID", qdp2, QueryTypeEnum.StoredProcedure, true);

    drpProduct.ClearSelection();
    drpProduct.DataSource = ds2.Tables[1];
    drpProduct.DataTextField = "ProductName";
    drpProduct.DataValueField = "SKUNumber";
    drpProduct.DataBind();

    drpProduct.Items.Insert(0, new ListItem("-- Select Product --", "0"));

    updatePanel1.Update();        
  }
  else
  {
    drpProduct.ClearSelection();
    PopulateProduct();        
  }
}

private void PopulateOrders()
{

  CustomerInfo ki = CustomerInfoProvider.GetCustomerInfoByUserID(CooneenHelper.GetUserImpersonisationID());
  int nKustomerID = ki.CustomerID;
  DataTable dts = new DataTable();
  dts.Columns.Add("OrderDate", typeof(string));
  dts.Columns.Add("OrderNumber", typeof(string));
  dts.Columns.Add("OrderItemSKUName", typeof(string));
  dts.Columns.Add("OrderItemSKUID", typeof(string));
  dts.Columns.Add("OrderItemStatus", typeof(string));
  dts.Columns.Add("OrderItemUnitCount", typeof(string));

  QueryDataParameters qdp = new QueryDataParameters();
  qdp.Add("@CustomerID", nKustomerID);
  DataSet ds = gc.ExecuteQuery("CN_OrderList", qdp, QueryTypeEnum.StoredProcedure, true);

  foreach (DataRow dr in ds.Tables[0].Rows)
  {
    DataRow drNew = dts.NewRow();
    drNew["OrderDate"] = ValidationHelper.GetDateTime(dr["OrderDate"], DateTime.Now).ToShortDateString();
    drNew["OrderNumber"] = dr["OrderNumber"].ToString();
    drNew["OrderItemSKUName"] = dr["OrderItemSKUName"].ToString();
    drNew["OrderItemSKUID"] = dr["OrderItemSKUID"].ToString();
    drNew["OrderItemStatus"] = dr["OrderItemStatus"].ToString();
    drNew["OrderItemUnitCount"] = dr["OrderItemUnitCount"].ToString();
    dts.Rows.Add(drNew);
  }

  PagedDataSource pds = new PagedDataSource();
  pds.DataSource = dts.DefaultView;
  //DataView view = dts.DefaultView;

  //allow paging, set page size, and current page
  pds.AllowPaging = true;
  pds.PageSize = PerPage;
  pds.CurrentPageIndex = CurrentPage;

  //show # of current page in label
  if (pds.PageCount > 1) litResults.Text += " - Showing page " + (CurrentPage + 1).ToString() + " of " + pds.PageCount.ToString();

  //disable prev/next buttons on the first/last pages
  btnPrev.Enabled = !pds.IsFirstPage;
  btnNext.Enabled = !pds.IsLastPage;            

  rprOrders.Visible = true;      

  rprOrders.DataSource = pds;
  rprOrders.DataBind();

}

Answer 1

我们遇到了类似的问题并且永远无法弄清楚它的根本原因，我们将其归结为WebForms中的一个错误。但是我们能够通过为控件或页面设置ClientIDMode="AutoID"来解决问题，我们最终设置了整个网站，因为我们发现了碰巧遇到的问题。如果这对您有用，请告诉我。希望我能得到更大的帮助。

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1 个答案: