如何在动态复选框列表中绑定动态复选框列表中的数据选择asp.net c＃中的索引更改？ [英] how to bind data in dynamic checkboxlist on dynamic checkboxlist selected index change in asp.net c#?

问题描述

如何在动态复选框列表中绑定动态复选框列表中的数据在asp.net c中选择索引更改＃??

请帮帮我

解决方案

< blockquote>我在asp.net中使用asp.net = DetailsView1，DropDownList1，Entities DataBase

 <   asp：dropdownlist     id   =  DropDownList1    runat   =  server    datatextfield   = 名称    datavaluefield   =  UserName    xmlns：asp   = ＃unknown >  <   / asp：dropdownlist  >  <   br     /  >  
 

c＃代码中的
for DropDownList1：

  if （！IsPostBack）
 {
 尝试 
 {
  //   DropDownList dropper = （DropDownList）DetailsView1.FindControl（DDL）;  
  //   if（dropper！= null） 
 {
 使用（DBNezamEntities db =  new  DBNezamEntities（））
 {
  var  Query = 来自 ro   db.Profiles.AsEnumerable（）
 
 选择  new  
 {
 UserName = ro.User.UserName，
 Name = getpro（ro.User .UserName）
 
 
}; 
  var  Query2 = 来自 val  查询
  orderby  val.Name 升序 
 选择 val; 
 
 DropDownList1.DataSource = Query2; 
 DropDownList1.DataBind（）; 
 
} 
} 
} 
  catch （例外）
 {
 
  throw ; 
} 
} 
 

用于数据库中的保存数据：

  protected   void  DetailsView1_ItemInserting（ object  sender，DetailsViewInsertEventArgs e）
 {
 
 e.Values [  UserName] = DropDownList1.SelectedValue.ToString（）; 
} 
 

例如：

HTML code

< asp：checkboxlist id =CheckBoxList1runat =serverautopostback =trueonselectedindexchanged =CheckBoxList1_SelectedIndexChangedxmlns：asp =＃unknown> 
< asp：listitem text =Test1value =1>< / asp：listitem> 
< asp：listitem text =Test2value =2>< / asp：listitem> 
< / asp：checkboxlist> 
< asp：panel runat =serverid =pnlDynamicxmlns：asp =＃unknown> < / ASP：面板> 
 

和后端代码

 protected void Page_Load（object sender，EventArgs e）
 {
 if（ViewState [cb]！= null）bindDynamicCB（Convert.ToInt32（ViewState [cb]））; 
} 
 protected void CheckBoxList1_SelectedIndexChanged（object sender，EventArgs e）
 {
 if（CheckBoxList1.SelectedIndex> -1）
 {
 ViewState [ cb] = CheckBoxList1.SelectedValue; 
 bindDynamicCB（Convert.ToInt32（ViewState [cb]））; 
} 
} 
 void bindDynamicCB（int value）
 {
 CheckBoxList cbDynamic = new CheckBoxList（）; 
 //您只需在参数条件下绑定数据库
 //cbDynamic.Items.Add(new ListItem {Text =Text+ value + 1，Value =Val1}）; 
 //cbDynamic.Items.Add(new ListItem {Text =Text+ value + 2，Value =Val1}）; 
 //cbDynamic.Items.Add(new ListItem {Text =Text+ value + 3，Value =Val2}）; 
 cbDynamic.Datasource = PutYOurValueMehod（value）; 
 cbDynamic.DataBinde（）; 
 //在这里创建一个动态事件
 cbDynamic.SelectedIndexChanged + = cbDynamic_SelectedIndexChanged; 
 cbDynamic.AutoPostBack = true; 
 
 //将动态控件添加到面板
 pnlDynamic.Controls.Add（cbDynamic）; 
} 
 void cbDynamic_SelectedIndexChanged（object sender，EventArgs e）
 {
 CheckBoxList cb =（CheckBoxList）sender; 
 Response.Write（cb.Text）; 
} 

how to bind data in dynamic checkboxlist on dynamic checkboxlist selected index change in asp.net c#??
please help me out

解决方案

i used asp.net = DetailsView1,DropDownList1,Entities DataBase

in asp.net

<asp:dropdownlist id="DropDownList1" runat="server" datatextfield="Name" datavaluefield="UserName" xmlns:asp="#unknown"></asp:dropdownlist><br />

in c# code for DropDownList1:

if (!IsPostBack)
       {
           try
           {
               //DropDownList dropper = (DropDownList)DetailsView1.FindControl("DDL");
               //if (dropper != null)
               {
                   using (DBNezamEntities db = new DBNezamEntities())
                   {
                       var Query = from ro in db.Profiles.AsEnumerable()

                                   select new
                                   {
                                       UserName = ro.User.UserName,
                                       Name = getpro(ro.User.UserName)


                                   };
                       var Query2 = from val in Query
                                    orderby val.Name ascending
                                    select val;

                       DropDownList1.DataSource = Query2;
                       DropDownList1.DataBind();

                   }
               }
           }
           catch (Exception)
           {

               throw;
           }
       }

for save data in database:

protected void DetailsView1_ItemInserting(object sender, DetailsViewInsertEventArgs e)
  {

      e.Values["UserName"] = DropDownList1.SelectedValue.ToString();
  }

For Example:
HTML code

<asp:checkboxlist id="CheckBoxList1" runat="server" autopostback="true" onselectedindexchanged="CheckBoxList1_SelectedIndexChanged" xmlns:asp="#unknown">
           <asp:listitem text="Test1" value="1"></asp:listitem>
            <asp:listitem text="Test2" value="2"></asp:listitem>
       </asp:checkboxlist>
       <asp:panel runat="server" id="pnlDynamic" xmlns:asp="#unknown"> </asp:panel>

And Backend CODE

 protected void Page_Load(object sender, EventArgs e)
    {
        if (ViewState["cb"] != null) bindDynamicCB(Convert.ToInt32(ViewState["cb"]));
    }
    protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (CheckBoxList1.SelectedIndex > -1)
        {
            ViewState["cb"] = CheckBoxList1.SelectedValue;
            bindDynamicCB(Convert.ToInt32(ViewState["cb"]));
        }
    }
    void bindDynamicCB(int value)
    { 
        CheckBoxList cbDynamic = new CheckBoxList(); 
        //You just bind with database given your parameter condition
        //cbDynamic.Items.Add(new ListItem { Text = "Text" + value + 1, Value = "Val1" });
        //cbDynamic.Items.Add(new ListItem { Text = "Text" + value + 2, Value = "Val1" });
        //cbDynamic.Items.Add(new ListItem { Text = "Text" + value + 3, Value = "Val2" });
        cbDynamic.Datasource=PutYOurValueMehod(value);
cbDynamic.DataBinde();
//Create a dynamic event here
        cbDynamic.SelectedIndexChanged += cbDynamic_SelectedIndexChanged;
        cbDynamic.AutoPostBack = true;

        //Add your dynamic control to panel
        pnlDynamic.Controls.Add(cbDynamic);
    }
 void cbDynamic_SelectedIndexChanged(object sender, EventArgs e)
    {
        CheckBoxList cb=(CheckBoxList)sender;
        Response.Write(cb.Text);
    }

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