如果选中checkboxlist2中的项目，如何检查checkboxlist1中的项目？ [英] How to check a item in checkboxlist1 when a item in checkboxlist2 is checked?

问题描述

您好，

我有2个复选框列表，我从数据库中填充数据。 checkboxlist1获取名称，而checkboxlist2获取该名称的相应roll_number。现在，当我检查checkboxlist1中的第二个名称时，第二个roll_number必须从checkboxlist2中选择。

谢谢

解决方案

让你有一个名为Students的数据库表的表如下
 ID |卷|姓名
 ------------------------ 
 1 | 0718004 | Anis 
 ------------------------ 
 2 | 0718003 | Asad 
 ----------------------- 
 3 | 0718002 | Toma 
 ----------------------- 

 In aspx 

 <   div  >  
 <  < span class =code-leadattribute> h3  > 选择名称<   / h3  >  
 <   asp：checkboxlist     id   =  CheckBoxListName    autopostback   =  true    onselectedindexchanged   =  CheckBoxListName_SelectedIndexChanged    runat   =  server    xmlns：asp   =  #unknown >  <   / asp：checkboxlist  >  
 <   h3  > 选择Roll <   / h3  >  
 <   asp：checkboxlist     id   =  CheckBoxListRoll    autopostback   =  true     onselectedindexchanged   =  CheckBoxListRoll_SelectedIndexChanged    runat   =  server    xmlns：asp   = ＃unknown >  <   / asp：checkboxlist  >  
 < ;   / div  >  

使用实体框架的.cs（代码隐藏）

  public   partial   class  _Default：System.Web.UI.Page 
 {
 
 
 BooksDBEntities db =  new  BooksDBEntities（ ）; 
 受保护  void  Page_Load（ object  sender，EventArgs e）
 {
  if （！IsPostBack）
 {
 
 List< student> ; lstStudents =  new  List< student>（）; 
 lstStudents = db.Students.ToList（）; 
  //  填写姓名复选框 
  foreach （学生 in  lstStudents）
 {
 ListItem li =  new  ListItem（）; 
 li.Text = s.Name; 
 li.Value = s.Roll; 
 
 CheckBoxListName.Items.Add（li）; 
} 
 
  //  填写滚动复选框 
 
  foreach （学生的 in  lstStudents）
 {
 ListItem li =  new  ListItem（）; 
 li.Text = s.Roll; 
 li.Value = s.Roll; 
 CheckBoxListRoll.Items.Add（li）; 
} 
  //    
 
 
} 
 
} 
 
  protected   void  CheckBoxListName_SelectedIndexChanged （ object  sender，EventArgs e）
 {
  foreach （ListItem li  CheckBoxListName.Items中的class =code-keyword> 
 {
 
 CheckBoxListRoll.Items.FindByValue（li.Value）.Selected = li.Selected; 
 
 
} 
 
} 
 
 受保护  void  CheckBoxListRoll_SelectedIndexChanged（ object  sender，EventArgs e）
 {
 
  foreach （ListItem li  in  CheckBoxListRoll.Items）
 {
 CheckBoxListName.Items.FindByValue（li.Value ）.Selected = li。选择; 
 
} 
} 
 
 
} 
 < /  学生 >  < /  学生 >  

使用上面的代码，如果你选择一个卷号，请说0718004，那么Name的复选框将自动选择Anis，反之亦然。我有链接，其中我提供了您可以下载的完整解决方案。如果它有效，那么upvote并接受为答案

下载

Hello,
I have 2 checkboxlist to which I am populating data from database. The checkboxlist1 get names while the checkboxlist2 get respective roll_number of that names. Now when I check the 2nd name in checkboxlist1, then 2nd roll_number has to get select from checkboxlist2.
Thank You

解决方案

Let you have a table having data database table named Students as follows
ID   |	Roll     | Name
------------------------
1    |	0718004	 | Anis
------------------------
2    | 0718003   | Asad
-----------------------
3    | 0718002   | Toma
-----------------------

In aspx

<div>
<h3>Select Name </h3>
<asp:checkboxlist id="CheckBoxListName" autopostback="true" onselectedindexchanged="CheckBoxListName_SelectedIndexChanged" runat="server" xmlns:asp="#unknown"></asp:checkboxlist>
<h3>Select Roll</h3>
<asp:checkboxlist id="CheckBoxListRoll" autopostback="true" onselectedindexchanged="CheckBoxListRoll_SelectedIndexChanged" runat="server" xmlns:asp="#unknown"></asp:checkboxlist>
</div>

In .cs (Code behind) using Entity Framework

  public partial class _Default : System.Web.UI.Page
    {
           

	  BooksDBEntities db = new BooksDBEntities();
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
              
                List<student> lstStudents = new List<student>();
                lstStudents = db.Students.ToList();
                //filling Names checkboxlist
                foreach (Student s in lstStudents)
                {
                    ListItem li = new ListItem();
                    li.Text = s.Name;
                    li.Value = s.Roll;

                    CheckBoxListName.Items.Add(li);
                }

                //filling Roll Checkboxlist

                foreach (Student s in lstStudents)
                {
                    ListItem li = new ListItem();
                    li.Text = s.Roll;
                    li.Value = s.Roll;
                    CheckBoxListRoll.Items.Add(li);
                }
                //


            }

        }
		
		 protected void CheckBoxListName_SelectedIndexChanged(object sender, EventArgs e)
        {
            foreach (ListItem li in CheckBoxListName.Items)
            {
               
                    CheckBoxListRoll.Items.FindByValue(li.Value).Selected = li.Selected;
          
            
            }
        
        }

        protected void CheckBoxListRoll_SelectedIndexChanged(object sender, EventArgs e)
        {

            foreach (ListItem li in CheckBoxListRoll.Items)
            {
                CheckBoxListName.Items.FindByValue(li.Value).Selected = li.Selected;

            }
        }
		
		
		}
</student></student>

Using above code if you select a roll number say 0718004 then the in checkboxlist for Name will automatically select Anis and vice versa. I have link wherein I provided the complete solution you can download. If it works then upvote and accept as answer 

Download

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