如何在javascript中的警报中显示checkboxlist的选定值 [英] how to display the selected values of checkboxlist in an alert in javascript

问题描述

如何在javascript中的警报中显示checkboxlist的选定值

例如：

how to display the selected values of checkboxlist in an alert in javascript
eg:

<asp:CheckBoxList ID="chklist" runat="server" >
<asp:ListItem Text="Apple" Value="Apple">
<asp:ListItem Text="Banana" Value="Banana">
<asp:ListItem Text="Orange" Value="Orange">

如果我们选择任何3项，输出应如下所示

输出：Apple，Banana和Orange

if we select any 3 items the output should be as below
output: Apple , Banana and Orange

推荐答案

aspx页面代码：

aspx page code:

<asp:CheckBoxList ID="CheckBoxList1" runat="server">
  <asp:ListItem Text="Apple" Value="Apple"></asp:ListItem>
  <asp:ListItem Text="Banana" Value="Banana"></asp:ListItem>
  <asp:ListItem Text="Orange" Value="Orange"></asp:ListItem>
</asp:CheckBoxList>

<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

代码落后（aspx.cs）：

code behind(aspx.cs):

protected void Button1_Click(object sender, EventArgs e)
    {
        string abc = "";
        foreach (ListItem item in CheckBoxList1.Items)
        {
            if (item.Selected)
            {
                abc += item.Value + ',';
            }
        }
        string test = "you have selected " + abc;
        Label labelshow = new Label();
        labelshow.Text = "<script language='javascript'>" + Environment.NewLine + "window.alert('" + test + "')</script>";
        Page.Controls.Add(labelshow);
    }

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