有什么办法只在 CheckBoxList 中获取选定的索引吗？

发布于 2024-10-14 19:45:18 字数 1098 浏览 1 评论 0原文

我只想在 checkBox lsit 中获取选定的索引或项目，而不是像 ListBox 中的 Like 那样迭代每个项目。

我在两种情况下获取选定的值通过这种方式：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class ChkBxList_2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {

        string li = "";
        foreach(ListItem lt in CheckBoxList1.Items)
        {
            if(lt.Selected)
            li += lt.Text;

        }
        Response.Write(li);


    }
    protected void Button2_Click(object sender, EventArgs e)
    {

        string li = "";
        foreach (int lt in ListBox1.GetSelectedIndices())
        {
          li += ListBox1.Items[lt].Text;

        }
        Response.Write(li);


    }
}

在列表框中，我们可以选择仅获取查看的项目是否有复选框列表？

原文

I want to get the selected Indices or Items only in checkBox lsit instead of iterating through each item as Like is there in ListBox.

I am Getting Selected Value In tWo case In this way:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class ChkBxList_2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {

        string li = "";
        foreach(ListItem lt in CheckBoxList1.Items)
        {
            if(lt.Selected)
            li += lt.Text;

        }
        Response.Write(li);


    }
    protected void Button2_Click(object sender, EventArgs e)
    {

        string li = "";
        foreach (int lt in ListBox1.GetSelectedIndices())
        {
          li += ListBox1.Items[lt].Text;

        }
        Response.Write(li);


    }
}

In ListBox we have the Option To get Seected Only Items is there any For Check Box List?

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冬天旳寂寞 2024-10-21 19:45:18

我认为不存在，但您可以使用这个扩展方法来实现这一点：

public List<ListItem> GetSelectedItems(this CheckBoxList checkBoxList)
{
    List<ListItem> list = new List<ListItem>();
    foreach(ListItem lt in checkBoxList)
    {
        if(lt.Selected)
            list.Add(lt);
    }
    return list;
}


//Call it like this
checkBoxList.GetSelectedItems();

I dont think there is but you could use this extension method that does exactly that:

public List<ListItem> GetSelectedItems(this CheckBoxList checkBoxList)
{
    List<ListItem> list = new List<ListItem>();
    foreach(ListItem lt in checkBoxList)
    {
        if(lt.Selected)
            list.Add(lt);
    }
    return list;
}


//Call it like this
checkBoxList.GetSelectedItems();

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