1
我使用列表框來查看我的數據庫的一些記錄作爲字符串。但現在有兩個不同的問題: 1.選擇更改不會通過雙擊或單擊進行調用,它僅在您選擇某個項目並按下返回時調用。 2.即使當選擇發生變化時,selectedIndex返回-1,所選值爲null。 ASP代碼:如何在asp中的列表框中獲取選定的項目?
<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代碼,我通過在VS2013監視窗口中檢查並沒有什麼特別的變量:
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)
{
}
,當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]);
}
我甚至試圖在按下刪除按鈕時得到選定的索引,但結果是一樣的。
檢查你是否綁定了ListView!Postback block – Adil 2015-02-24 10:13:13
:D whats that?!! 這是我所有的代碼,我是新的ASP – 2015-02-24 10:14:43
如何綁定列表框? – Adil 2015-02-24 10:15:55