1
我使用列表框来查看我的数据库的一些记录作为字符串。但现在有两个不同的问题: 1.选择更改不会通过双击或单击进行调用,它仅在您选择某个项目并按下返回时调用。 2.即使当选择发生变化时,selectedIndex返回-1,所选值为null。 ASP代码:如何在asp中的列表框中获取选定的项目?
<form runat="server">
<div class="clearfix">
<asp:ListBox runat="server" ID="g1SeasonsListView" CssClass="adminSeasonsListView" OnSelectedIndexChanged="g1SeasonsListView_SelectedIndexChanged" />
<asp:ListBox runat="server" ID="g2SeasonsListView" CssClass="adminSeasonsListView" />
<asp:ListBox runat="server" ID="g3SeasonsListView" CssClass="adminSeasonsListView" />
</div>
<div class="clearfix">
<asp:Button ID="g1DeleteBtn" Text="Delete" runat="server" OnClick="g1DeleteBtn_Click" CssClass="adminDeleteBtn" />
<asp:Button ID="g2DeleteBtn" Text="Delete" runat="server" OnClick="g2DeleteBtn_Click" CssClass="adminDeleteBtn" />
<asp:Button ID="g3DeleteBtn" Text="Delete" runat="server" OnClick="g3DeleteBtn_Click" CssClass="adminDeleteBtn" />
</div>
</form>
和CS代码,我通过在VS2013监视窗口中检查并没有什么特别的变量:
protected void g1DeleteBtn_Click(object sender, EventArgs e)
{
}
protected void g2DeleteBtn_Click(object sender, EventArgs e)
{
}
protected void g3DeleteBtn_Click(object sender, EventArgs e)
{
}
protected void g1SeasonsListView_SelectedIndexChanged(object sender, EventArgs e)
{
}
,当我想更新列表框使用:
private void UpdateListeView()
{
List<string> seasonsListTemp = null;
g1SeasonsListView.Items.Clear();
seasonsListTemp = (from s in database.Gs where s.grade == 1 select s.season).ToList();
for (int i = 0; i < seasonsListTemp.Count; i++)
g1SeasonsListView.Items.Add(seasonsListTemp[i]);
g2SeasonsListView.Items.Clear();
seasonsListTemp = (from s in database.Gs where s.grade == 2 select s.season).ToList();
for (int i = 0; i < seasonsListTemp.Count; i++)
g2SeasonsListView.Items.Add(seasonsListTemp[i]);
g3SeasonsListView.Items.Clear();
seasonsListTemp = (from s in database.Gs where s.grade == 3 select s.season).ToList();
for (int i = 0; i < seasonsListTemp.Count; i++)
g3SeasonsListView.Items.Add(seasonsListTemp[i]);
}
我甚至试图在按下删除按钮时得到选定的索引,但结果是一样的。
检查你是否绑定了ListView!Postback block – Adil 2015-02-24 10:13:13
:D whats that?!! 这是我所有的代码,我是新的ASP – 2015-02-24 10:14:43
如何绑定列表框? – Adil 2015-02-24 10:15:55