我在转发器外面有一个2下拉列表（第一个ddl将触发并刷新转发器的内容，第二个ddl在转发器内的一个项目执行后刷新其列表）和转发器内的下拉列表控件。我不会＃39 ; t通过selectedindexchanged触发第1个下拉列表但第2个下拉列表有问题，它还会触发转发器内下拉列表的selectedindexchanged。我在转发器和第二个下拉列表上放置了UpdatePanel，但仍然发生错误。
如何跟踪逐步执行以及为什么selectedindexchanged处理程序会启动？
以下是代码段：
背后的代码：
public partial class NewStyleItem : System.Web.UI.Page
{
protected StyleTemplateManager styleTempMngr = new StyleTemplateManager();
protected StyleFabricationManager styleFabMngr = new StyleFabricationManager();
protected List<ComponentReferenceView> ReferenceLookUpList
{
get
{
return (List<ComponentReferenceView>)ViewState["ReferenceLookUpView"];
}
set
{
ViewState["ReferenceLookUpView"] = value;
}
}
protected List<ComponentReferenceView> ReferenceViewList
{
get
{
return (List<ComponentReferenceView>)ViewState["CompReferenceView"];
}
set
{
ViewState["CompReferenceView"] = value;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (this.IsPostBack == false)
{
LoadBrandList();
ddlGarmentList.Enabled = false;
//ReferenceLookUpList = new List<ComponentReferenceView>();
}
else
{
}
//rptStyleComponents.DataSource = ReferenceLookUpList;
//rptStyleComponents.DataBind();
}
protected void LoadBrandList()
{
BrandManager brandMngr = new BrandManager();
ddlBrandList.Items.Clear();
ddlBrandList.Items.Add(new ListItem { Text = "Select brand", Value = "" });
foreach (Brand item in brandMngr.Brands())
{
ddlBrandList.Items.Add(new ListItem
{
Text = item.BrandDescription,
Value = item.BrandCode
});
}
}
protected void LoadComponentInfo(string BrandCode)
{
if (styleTempMngr.FindTemplateByBrandCode(BrandCode) == true)
{
ReferenceLookUpList = (from StyleComponent i in styleFabMngr.ComponentList
join StyleFabReference x in styleTempMngr.ReferenceList on
i.SectionCode equals x.SectionCode
select new ComponentReferenceView
{
InOrder = x.SortOrder,
IsNeeded = x.IsRequired,
SCode = x.SeriesCode,
SecCode = x.SectionCode,
SecName = i.SectionName,
EntryValue = x.DataCharacter
}).OrderBy(p => p.InOrder).ToList();
ReferenceLookUpList.Where(row => row.SecCode == "BCODE").ToList()
.ForEach(refItem => refItem.EntryValue = ddlBrandList.SelectedValue);
var DistinctList = (from StyleFabReference x in styleTempMngr.ReferenceList.OrderBy(p => p.SortOrder).ToList()
where x.SectionCode != "SPCHAR" && x.SectionCode != "BCODE"
select x.SectionCode).Distinct().ToList();
ReferenceViewList = (from StyleComponent i in styleFabMngr.ComponentList
join x in DistinctList on
i.SectionCode equals x
select new ComponentReferenceView
{
SecCode = x,
SecName = i.SectionName
}).OrderBy(p => p.InOrder).ToList();
}
else
ReferenceViewList = new List<ComponentReferenceView>();
rptStyleComponents.DataSource = ReferenceViewList;
rptStyleComponents.DataBind();
}
protected void LoadGarments(string ApparelCode)
{
if (string.IsNullOrEmpty(ddlBrandList.SelectedValue) == true)
{
ddlGarmentList.SelectedIndex = 0;
ddlGarmentList.Enabled = false;
}
else
{
ddlGarmentList.Enabled = true;
GarmentManager gmMngr = new GarmentManager();
List<Garment> garmentList = new List<Garment>();
garmentList = gmMngr.GetGarmentsByBrand(ddlBrandList.SelectedValue, ApparelCode);
ddlGarmentList.Items.Clear();
ddlGarmentList.Items.Add(new ListItem { Text = "Select garment", Value = "" });
foreach (Garment item in garmentList)
{
ddlGarmentList.Items.Add(new ListItem { Text = item.GarmentDescription, Value = item.GarmentCode });
}
}
}
protected void ddlBrandList_SelectedIndexChanged(object sender, EventArgs e)
{
txtNewStyleNo.Text = string.Empty;
if (string.IsNullOrEmpty(ddlBrandList.SelectedValue) == false)
LoadComponentInfo(ddlBrandList.SelectedValue);
}
[Serializable]
public class ComponentReferenceView
{
public string SCode
{
get;
set;
}
public string SecCode
{
get;
set;
}
public string SecName
{
get;
set;
}
public int InOrder
{
get;
set;
}
public bool IsNeeded
{
get;
set;
}
public string EntryValue
{
get;
set;
}
}
protected void rptStyleComponents_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
}
protected void rptStyleComponents_ItemCreated(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DropDownList ddlControl = (DropDownList)e.Item.FindControl("ddlDataSelection");
if (ddlControl != null)
{
ddlControl.AppendDataBoundItems = true;
ddlControl.Items.Add(new ListItem { Text = "Select " + ReferenceViewList[e.Item.ItemIndex].SecName.ToLowerInvariant(), Value = "" });
var itemlist = (from x in styleFabMngr.ComponentRowItems(ReferenceViewList[e.Item.ItemIndex].SecCode).AsEnumerable()
select new ListItem
{
Text = x.Field<string>("col_name"),
Value = x.Field<string>("col_value")
});
ddlControl.Items.AddRange(itemlist.ToArray<ListItem>());
ddlControl.EnableViewState = false;
ddlControl.AutoPostBack = true;
ddlControl.SelectedIndexChanged += new EventHandler(DropDownListSelectedIndexChanged);
}
}
}
protected virtual void DropDownListSelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList)sender;
RepeaterItem item = (RepeaterItem)ddl.NamingContainer;
ReferenceViewList[item.ItemIndex].EntryValue = ddl.SelectedValue;
ConstructStyleNo();
var Apparelfound = ReferenceViewList.Where(x => x.SecCode == "APCODE" &&
string.IsNullOrEmpty(x.EntryValue) == false).FirstOrDefault();
if (Apparelfound != null)
{
ddlGarmentList.Enabled = true;
LoadGarments(Apparelfound.EntryValue);
}
else
{
ddlGarmentList.Enabled = false;
}
}
private void ConstructStyleNo()
{
foreach (ComponentReferenceView item in ReferenceViewList)
{
ReferenceLookUpList.Where(row => row.SecCode == item.SecCode).ToList()
.ForEach(refItem => refItem.EntryValue = item.EntryValue);
}
string sResult = string.Empty;
var result = (from x in ReferenceLookUpList.OrderBy(y => y.InOrder)
select x.EntryValue);
txtNewStyleNo.Text = string.Empty;
if (result != null)
txtNewStyleNo.Text = String.Join("", result) + "0001";
}
private void ConstructStyleDescription()
{
txtStyleDescription.Text = ddlBrandList.SelectedItem.Text + "-" + ddlGarmentList.SelectedItem.Text;
}
protected void ddlGarmentList_SelectedIndexChanged(object sender, EventArgs e)
{
txtStyleDescription.Text = string.Empty;
if (string.IsNullOrEmpty(ddlGarmentList.SelectedValue) == false)
ConstructStyleDescription();
}
}
ASPX:
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:UpdatePanel ID="upnlNewFabrication" runat="server">
<ContentTemplate>
<h1>
New Style Item
</h1>
<br />
<%--<usrCtrl:style_generation ID="stylegen_frm" runat="server">
</usrCtrl:style_generation>--%>
<table>
<tr>
<td>
Brand :
</td>
<td>
<asp:DropDownList ID="ddlBrandList" runat="server"
onselectedindexchanged="ddlBrandList_SelectedIndexChanged"
AutoPostBack="True">
</asp:DropDownList>
</td>
</tr>
<tr>
<td colspan="2">
</td>
</tr>
<tr>
<td>
Generated Style# :
</td>
<td>
<asp:TextBox ID="txtNewStyleNo" runat="server" ReadOnly="true"></asp:TextBox>
</td>
</tr>
<tr>
<td>
Style Description :
</td>
<td>
<asp:TextBox ID="txtStyleDescription" runat="server" ReadOnly="true"></asp:TextBox>
</td>
</tr>
<asp:Repeater ID="rptStyleComponents" runat="server"
onitemdatabound="rptStyleComponents_ItemDataBound"
onitemcreated="rptStyleComponents_ItemCreated"
EnableViewState="True">
<ItemTemplate>
<asp:UpdatePanel ID="upnlComponent" runat="server">
<ContentTemplate>
<tr>
<td>
<asp:Label ID="lblSectionName" runat="server" Text='<%# Eval("SecName")%>' ></asp:Label>
</td>
<td>
<asp:DropDownList ID="ddlDataSelection" runat="server">
</asp:DropDownList>
</td>
</tr>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="ddlDataSelection" />
</Triggers>
</asp:UpdatePanel>
</ItemTemplate>
</asp:Repeater>
</table>
<br />
<table>
<tr>
<td colspan="2">Description Items</td>
</tr>
<tr>
<td colspan="4"></td>
</tr>
<tr>
<td>Garment Type:</td>
<td>
<asp:UpdatePanel ID="upGarment" runat="server" >
<ContentTemplate>
<asp:DropDownList ID="ddlGarmentList" runat="server"
AppendDataBoundItems="True" AutoPostBack="True"
onselectedindexchanged="ddlGarmentList_SelectedIndexChanged">
<asp:ListItem Text = "Select garment" Value = ""></asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="sdsGarment" runat="server"
ConnectionString="<%$ ConnectionStrings:IRMSConnectionString %>"
SelectCommand="Select * from Garments"></asp:SqlDataSource>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="ddlGarmentList" />
</Triggers>
</asp:UpdatePanel>
</td>
</tr>
<tr>
<td>Cost Price:</td>
<td>
<asp:TextBox ID="txtCostPrice" runat="server"></asp:TextBox></td>
<td>SRP :</td>
<td><asp:TextBox ID="txtSRP" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>Quantity :</td>
<td><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></td>
<td>Week :</td>
<td><asp:TextBox ID="TextBox2" runat="server"></asp:TextBox></td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>