我有一个Panel visible = false。我有逻辑，如果满足条件，应该使面板可见。 我无法找到我猜测的面板，因为它不可见。也许我会尝试另一个事件，看看我是否应该在那里看到面板。像数据绑定事件一样？
UPDATE **************** 根据下面的评论使用display：none 优秀的建议。我当然认为它会解决我的问题。但是在做了好几件事后，我无法得到面板样式=＆＃34; display：none＆＃34;甚至隐藏面板。我知道我在编辑中的正确面板，因为我在里面更改了文本。
我已经完成了一些事情，例如禁用的viewstate，代码前面板中的样式硬编码，add.attribute（＆＃34; style＆＃34;，block）位于itemcommand事件的顶部，放入一个testPanel认为我有某种东西覆盖了能见度......
更新＃2 *************** 我完全难过......这一切都应该工作......所以，我做了一些进一步的谷歌搜索。现在我可能遗漏了一些重要的信息，不知道它是否重要。 - 我有一个网格视图 - 下面的表格由selectedindex事件产生 - 我尝试从以下帖子实施，但没有快乐 I cannot change control's visibility on C# code
测试结果： - 编辑命令正在被正确触发 - 我删除了除太平洋控制之外的任何控件 - 可以更改更新面板外部的面板 - 我更改了更新面板＆＃34; UpdateMode＆＃34;有条件地确保没有其他东西被覆盖 即使我知道这个面板仅在此时存在，因为我刚刚添加它。
这与gridview有关吗？我在下面添加了它
的.aspx
<asp:Panel ID="pnlCollectionEventAll" runat="server">
<asp:GridView ID="gvCollectionEventDetail" runat="server" SkinID="annualReportGridview" AllowSorting="True"
AutoGenerateColumns="False" CellPadding="4" DataSourceID="odsMRWCollectionDetailByReportId" EnableSortingAndPagingCallbacks="false"
DataKeyNames="MRWCollectionReportDetailId" ForeColor="#333333" GridLines="Vertical" Width="720px"
ShowFooter="True" OnRowDataBound="gvCollectionEventDetail_RowDataBound" OnSelectedIndexChanged="gvCollectionEventDetail_SelectedIndexChanged">
<Columns>
<asp:CommandField ButtonType="button" ShowSelectButton="true" SelectText="Select"
ItemStyle-HorizontalAlign="Left" ControlStyle-ForeColor="#1A3B69" />
<asp:TemplateField HeaderText="Disposal Method" SortExpression="DisposalMethodCode"
FooterStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:Label ID="lblDisposalMethod" runat="server" Text='<%# Eval("DisposalMethodCode") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Qty disposed (lbs)" FooterStyle-HorizontalAlign="Left"
HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:Label ID="lblWasteQty" runat="server" Text='<%# Eval("WasteQuantity") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Left" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Contractor" FooterStyle-HorizontalAlign="Left"
HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
County:<asp:Label ID="lblSourceCounty" runat="server" Text='<%# Eval("CountyName") %>'></asp:Label>
State:<asp:Label ID="lblSourceState" runat="server" Text='<%# Eval("StateCode") %>'></asp:Label>
Country:<asp:Label ID="lblSourceCountry" runat="server" Text='<%# Eval("CountryName") %>'></asp:Label> <br />
</ItemTemplate>
<ItemStyle HorizontalAlign="Left" />
</asp:TemplateField>
</Columns>
<EmptyDataTemplate>
No MRW Collection details have been entered for this report.
</EmptyDataTemplate>
</asp:GridView>
</asp:Panel>
<asp:Button ID="btn_addWasteCollectedRecord" runat="server" Text="Add a New Waste Collected Record" OnClick="btn_addWasteCollectedRecord_Click" />
<asp:Button ID="btn_addWasteCollectedRecordDone" runat="server" Text="Done Adding Waste Collected Records" Visible="false" OnClick="btn_addWasteCollectedRecordDone_Click" />
<br /><br />
<asp:FormView ID="fvWasteCollected" runat="server" SkinID="annualReportFormview" ViewStateMode="Disabled"
HeaderText="Selected Waste Collected Detail" DataKeyNames="MRWCollectionReportDetailId" DefaultMode="Insert"
DataSourceID="odsMRWWasteCollectedDetail" OnDataBound="fvWasteCollected_DataBound"
OnItemCommand="fvWasteCollected_ItemCommand" OnItemInserted="fvWasteCollected_ItemInserted"
OnItemUpdated="fvWasteCollected_ItemUpdated" OnItemDeleted="fvWasteCollected_ItemDeleted">
<EditItemTemplate>
<table class="detailstable">
<asp:Panel ID="pnlOtherContractor" runat="server" Visible="false">
<tr>
<th></th>
<td align="left">
Blah Blah
</td>
</tr>
</asp:Panel>
</table>
</EditItemTemplate>
aspx.cs
protected void gvCollectionEventDetail_SelectedIndexChanged(object sender, EventArgs e)
{
fvWasteCollected.ChangeMode(FormViewMode.ReadOnly);
fvWasteCollected.DataBind();
pnlMWRCOllectionForm.Visible = true;
//hide the compost produced add linkbutton
btn_addWasteCollectedRecord.Visible = false;
btn_addWasteCollectedRecordDone.Visible = false;
// hide the edit delete button on fvFeedstockDetail if the annual report already submitted
//and the logon user is not ecy staff authorized to edit report ##################################
Label myLblSubmitDate1 = (Label)fvRptHeader.FindControl("lblSubmitDate");
LinkButton lbtnWasteCollectedEdit = (LinkButton)fvWasteCollected.FindControl("lbtnWasteCollectedEdit");
LinkButton lbtnWasteCollectedDelete = (LinkButton)fvWasteCollected.FindControl("lbtnWasteCollectedDelete");
if (!String.IsNullOrEmpty(myLblSubmitDate1.Text.Trim()))
{
lbtnWasteCollectedEdit.Visible = false;
lbtnWasteCollectedDelete.Visible = false;
btn_addWasteCollectedRecord.Visible = false;
}
}
protected void fvWasteCollected_ItemCommand(object sender, FormViewCommandEventArgs e)
{
if (e.CommandName.Equals("Edit"))
{
ValidationSummaryWasteDetail.ValidationGroup = "WasteReceivedDetail";
fvWasteCollected.ChangeMode(FormViewMode.Edit);
gvCollectionEventDetail.Columns[0].Visible = false;
DataRowView rowView = (DataRowView)fvWasteCollected.DataItem;
DropDownList ddl = (DropDownList)fvWasteCollected.FindControl("ddl_MRWContractor");
//Tried Panel pnlOtherContractor = (Panel)fvWasteCollected.FindControl("pnlOtherContractor");
FormViewRow myFormRow = fvWasteCollected.Row;
Panel pnlOtherContractor = (Panel)myFormRow.FindControl("pnlOtherContractor");
var s_contractorId = rowView["MRWContractorId"].ToString();
if (s_contractorId == "0")
{
pnlOtherContractor.Visible = true;
}
}
}
答案 0 :(得分：0)
应该有一个按钮触发表单视图上的编辑/更新。检查它是否具有CommandName =＆＃34;编辑＆＃34;作为其属性。
答案 1 :(得分：0)
尝试100％工作和测试：
即使您设置了Visible="false"或Visible="true"或
Style="display: none"
无关紧要您肯定会从FormView's行获得Panel
使用这个
FormViewRow myFormRow = fvWasteCollected.Row;
Panel pnlOtherContractor1 = (Panel)myFormRow.FindControl("pnlOtherContractor");
注意：您的问题在我的电脑上工作正常。我建议您设置断点并检查每个控件是否为空或myFormRow是否为空{{1事件。
答案 2 :(得分：0)
解决了它。表单在生命周期中还为时过早。在Databound事件中，检查currentMode是否在编辑中，然后我对数据进行了检查
protected void fvWasteCollected_DataBound(object sender, EventArgs e)
{
FormView formview = fvWasteCollected;
FormViewRow row = fvWasteCollected.Row;
DataRowView rowview = (DataRowView)fvWasteCollected.DataItem;
Panel pnlOtherContractor = (Panel)fvWasteCollected.FindControl("pnlOtherContractor2");
if (fvWasteCollected.CurrentMode == FormViewMode.Edit)
{
var s_contractorId = rowview["MRWContractorId"].ToString();
if (s_contractorId == "0")
{
pnlOtherContractor.Visible = true;
}
else
{
pnlOtherContractor.Visible = false;
}
}
}