在项目中添加一个新的网页，在网页上添加一个TextBox控件、三个ImageButton
在项目中添加一个新的网页，在网页上添加一个TextBox控件、三个ImageButton控件、一个DropDownList控件、一个ListBox控件，实现点击第一个Im...
在项目中添加一个新的网页，在网页上添加一个TextBox控件、三个ImageButton控件、一个DropDownList控件、一个ListBox控件，实现点击第一个ImageButton控件时把TextBox中输入的内容同时添加到DropDownList控件和ListBox控件内；点击第二个ImageButton控件时删除DropDownList控件中当前选中项；点击第三个ImageButton控件时删除ListBox控件中选中项，无选中项时提示用户选中；当选择DropDownList控件或者ListBox控件中选项时把当前选中项显示在TexBox控件中。
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protected void Page_Load(object sender, EventArgs e)
{
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
string Txt = TextBox1.Text;
DropDownList1.Items.Add(new ListItem(Txt, Txt));
ListBox1.Items.Add(new ListItem(Txt, Txt));
}
protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
{
int index = DropDownList1.SelectedIndex;
DropDownList1.Items.RemoveAt(index);
}
protected void ImageButton3_Click(object sender, ImageClickEventArgs e)
{
int index = ListBox1.SelectedIndex;
ListBox1.Items.RemoveAt(index);
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (sender.GetType().Name == "DropDownList")
{
TextBox1.Text = DropDownList1.SelectedItem.Text;
}
else {
TextBox1.Text = ListBox1.SelectedItem.Text;
}
}
<html xmlns=" http://www.w3.org/1999/xhtml">
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">
function vali() {
var index = document.getElementById("ListBox1").selectedIndex;
if (index < 0) {
alert("请选择！");
return false;
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton1_Click" />
<br />
<asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton2_Click" />
<br />
<asp:ImageButton ID="ImageButton3" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton3_Click" OnClientClick="javascript:return vali();"/>
<br />
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList><br />
<asp:ListBox ID="ListBox1" runat="server"
onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True"></asp:ListBox><br />
</div>
</form>
</body>
</html>
{
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
string Txt = TextBox1.Text;
DropDownList1.Items.Add(new ListItem(Txt, Txt));
ListBox1.Items.Add(new ListItem(Txt, Txt));
}
protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
{
int index = DropDownList1.SelectedIndex;
DropDownList1.Items.RemoveAt(index);
}
protected void ImageButton3_Click(object sender, ImageClickEventArgs e)
{
int index = ListBox1.SelectedIndex;
ListBox1.Items.RemoveAt(index);
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (sender.GetType().Name == "DropDownList")
{
TextBox1.Text = DropDownList1.SelectedItem.Text;
}
else {
TextBox1.Text = ListBox1.SelectedItem.Text;
}
}
<html xmlns=" http://www.w3.org/1999/xhtml">
<head runat="server">
<title>无标题页</title>
<script type="text/javascript">
function vali() {
var index = document.getElementById("ListBox1").selectedIndex;
if (index < 0) {
alert("请选择！");
return false;
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton1_Click" />
<br />
<asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton2_Click" />
<br />
<asp:ImageButton ID="ImageButton3" runat="server" ImageUrl="~/img/01.jpg"
onclick="ImageButton3_Click" OnClientClick="javascript:return vali();"/>
<br />
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList><br />
<asp:ListBox ID="ListBox1" runat="server"
onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True"></asp:ListBox><br />
</div>
</form>
</body>
</html>
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