提问人：Semyon Labzov 提问时间：9/16/2018 最后编辑：Semyon Labzov 更新时间：9/16/2018 访问量：29
asp.net - SelectItemTemplate 不起作用
asp.net - SelectItemTemplate doesn't work
问：
我有两张桌子。首先工作正常 - 如果按钮 ID=“Button1” CommandName=“Select” 按下的选定项目变为红色。但是，如果我按下它自己的按钮 ID=“Button2” CommandName=“Select”，第二个表就不会做同样的事情。
第一个表 listView ID=“ListViewGrSDtudents”
第二个表 listView ID=“ListViewGroups”
现在有人为什么它不起作用吗？
这是我的 .aspx 代码：
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body>
<form id="form1" runat="server">
<!-- Таблица групп -->
<div>
<asp:ListView ID="ListViewGroups"
runat="server"
ItemType="BD_Class_Library.studentGroup"
DataKeyNames="groupId"
SelectMethod="GetStudGroups"
InsertMethod="InsertStudGroup"
UpdateMethod="UpdateGroup"
DeleteMethod="DeleteGroup"
OnSelectedIndexChanged="ListViewGroups_SelectedIndexChanged">
<InsertItemTemplate>
<tr style="background-color: yellowgreen">
<td></td>
<td>
<input id="groupName" runat="server" value="<%# BindItem.groupName %>" /></td>
<td>
<asp:Button ID="Button1" Width="100%" CommandName="Insert" runat="server" Text="Вставить" />
</td>
</tr>
</InsertItemTemplate>
<EditItemTemplate>
<tr style="background-color: yellow">
<td><%# Item.groupId %></td>
<td>
<input id="groupName" runat="server" value="<%# BindItem.groupName %>" /></td>
<td>
<asp:Button CommandName="Update" runat="server" Text="Сохранить" />
<asp:Button CommandName="Cancel" runat="server" Text="Отмена" />
</td>
</tr>
</EditItemTemplate>
<LayoutTemplate>
<table border="1">
<tr style="background-color: darkgray">
<th>ID</th>
<th>Группа</th>
<th></th>
</tr>
<tr id="itemPlaceholder" runat="server"></tr>
</table>
</LayoutTemplate>
<SelectedItemTemplate>
<tr style="background-color: red">
<td><%# Item.groupId %></td>
<td><%# Item.groupName %></td>
<td>
<asp:Button CommandName="Edit" runat="server" Text="Изменить" />
<asp:Button CommandName="Delete" runat="server" Text="Удалить" />
</td>
</tr>
</SelectedItemTemplate>
<ItemTemplate>
<tr style="background-color: grey">
<td><%# Item.groupId %></td>
<td><%# Item.groupName %></td>
<td>
<asp:Button CommandName="Select" runat="server" Text="Выбрать" />
<asp:Button CommandName="Edit" runat="server" Text="Изменить" />
<asp:Button CommandName="Delete" runat="server" Text="Удалить" />
</td>
</tr>
</ItemTemplate>
</asp:ListView>
</div>
<div>
<asp:ListView
ID="ListViewGrSDtudents"
runat="server"
ItemType="BD_Class_Library.student"
DataKeyNames="studId"
OnSelectedIndexChanging="ListViewGrSDtudents_SelectedIndexChanging"
OnSelectedIndexChanged="ListViewGrSDtudents_SelectedIndexChanged">
<SelectedItemTemplate>
<tr style="background-color: red">
<td><%# Item.studId %></td>
<td><%# Item.studFam %></td>
<td><%# Item.studName %></td>
<td><%# Item.studOtc %></td>
<td><%# Item.studBiletNum %></td>
</tr>
</SelectedItemTemplate>
<ItemTemplate>
<tr style="background-color: grey">
<td><%# Item.studId %></td>
<td><%# Item.studFam %></td>
<td><%# Item.studName %></td>
<td><%# Item.studOtc %></td>
<td><%# Item.studBiletNum %></td>
<td><asp:Button ID="Button2" CommandName="Select" runat="server" Text="Выбрать" /></td>
</tr>
</ItemTemplate>
<LayoutTemplate>
<table border="1" style="width: 60%">
<tr id="groupPlaceholder" runat="server"></tr>
<tr style="background-color: aqua">
<th>ID студента</th>
<th>Фамилия</th>
<th>Имя</th>
<th>Отчество</th>
<th>Студ. билет</th>
</tr>
<tr id="itemPlaceholder" runat="server" itemplaceholderid="itemPlaceholderStudent"></tr>
</table>
</LayoutTemplate>
<EmptyDataTemplate>
<table border="1" style="width: 60%">
<tr style="background-color: aqua">
<th>ID студента</th>
<th>Фамилия</th>
<th>Имя</th>
<th>Отчество</th>
<th>Студ. билет</th>
<th></th>
</tr>
<tr style="background-color: grey">
<td colspan="5" style="text-align: center">В данной группе нет студентов</<td>
</tr>
</table>
</EmptyDataTemplate>
</asp:ListView>
</div>
</form>
</body>
</html>
event - ListViewGrSDtudents_SelectedIndexChanged代码：
protected void ListViewGrSDtudents_SelectedIndexChanged(object sender, EventArgs e)
{
int selStudent = (int)ListViewGrSDtudents.SelectedDataKey.Value;
Session["SelectedStudent"] = selStudent;
Session["SelectedStudentIndex"] = ListViewGrSDtudents.SelectedIndex;
Response.Redirect("~/Default.aspx");
}
答： 暂无答案
评论
itemplaceholderid属性不属于 itempaceholder 本身。ListViewitemplaceholderid="itemPlaceholderStudent"OnSelectedIndexChangingOnSelectedIndexChanged