页面中的动态按钮不激活事件 [英] dynamic button not fire event in the page

问题描述

页面中的动态按钮没有火灾事件



问题：保存按钮没有被解雇...我怎么能解决问题。



这里是后面的代码

  public   partial   class  _Default：System.Web.UI.Page 
 {
 受保护  void  Page_Load（ object  sender ，EventArgs e）
 {
} 
 
  protected   void  Page_PreRender（ object  sender，EventArgs e）
 {
  if （IsPostBack ）
 {
 btnCreate_Click（sender，e）; 
 
} 
} 
 
 受保护  void  btnCreate_Click（ object  sender，EventArgs e）
 {
 DivTextBoxCreator.Controls.Clear（）; 
 HtmlTable htable =  new  HtmlTable（）; 
 htable.BgColor =  黄色; 
  for （ int  i =  1 ; i <  =  int  .Parse（TextBox1.Text）; i ++）
 {
 HtmlTableRow hRow =  new  HtmlTableRow（）; 
 HtmlTableCell hCell =  new  HtmlTableCell（）; 
 TextBox txtGenerator =  new  TextBox（）; 
 
 txtGenerator.Text =   TextBox： + i; 
 hCell.Controls.Add（txtGenerator）; 
 hRow.Controls.Add（hCell）; 
 htable.Controls.Add（hRow）; 
} 
 DivTextBoxCreator.Controls.Add（htable）; 
 
  //  创建保存按钮 
按钮按钮保存= < span class =code-keyword> new  Button（）; 
 buttonSave.ID =   buttonSave; 
 buttonSave.Text =  保存; 
 buttonSave。 önClientClick=   return validate（）; 
 buttonSave.Click + =  new  EventHandler（buttonSave_Click）; 
 buttonSave_Click（发件人，e）; 
 DivTextBoxCreator.Controls.Add（buttonSave）; 
} 
 
 受保护  void  buttonSave_Click（ object  sender，EventArgs e）
 {
 Response.Write（ 测试）; 
} 
} 

这里是标签

 <％@     Page    语言  =   C＃    AutoEventWireup   =  true    CodeFile   =  Default.aspx.cs   继承  =  _Default   ％>  
 
 & lt;  ！DOCTYPE     html     PUBLIC     -  // W3C // DTD     XHTML     1.0     Transitional / / EN   http://www.w3.org/TR/xhtml1/DTD/xhtml1- transitional.dtd >  
 
 <   html     xmlns   =  http://www.w3.org/1999/xhtml >  
 <   head     runat   = 服务器 >  
 <   title  >  <   / title  >  
 <   / head  >  
 <  正文 >  
 <  表格    id   =  form1    runat   = 服务器 >  
 <   div  >  
 
 <   asp：ScriptManager     ID   =  ScriptManager1    runat   =  server >  
 <   / asp：ScriptManager  >  
 
 <  表格 >  
 <   tr  >  
 <   td  >  
 输入文本框数 <   / td  >  
 <   td  >  
 <   asp：TextBox     ID   = < span class =code-keyword> TextBox1     runat   = < span class =code-keyword> server >  <   / asp：TextBox  >  
 <   / td  >  
 <   / tr  >  
 < ;   tr  >  
  <   td  >  
 <   / td  >  
 <   td  < span class =code-attribute>   style   =  margin-removed 40px >  
 <  < span class =code-leadattribute> asp：按钮    ID   =  btnCreate    runat   =  server   文本  = 创建 < span class =code-attribute>  宽度  =  139px    
   
                                                   onclick   =  btnCreate_Click    /  >  
 <   / td  >  
 <   / tr  >  
 <   tr  >  
 <   td  >  
 <   / td  >  
 <   td     style   =  margin -removed 40px >  
 <   / td  >  
 <   / tr  >  
 <   tr  >  
 <  < span class =code-leadattribute> td  >  
 <   / td  >  
 <   td  < span class =code-attribute>   style   =  margin-removed 40px >  
 
 <   asp：UpdatePanel     ID  < span class =code-keyword> =  UpdatePanel1    runat   =  server >  
 <   ContentTemplate  >  
 <   div     id   =  DivTextBoxCreator      runat   = 服务器 >  
 
 <   / div  >  
 <   / ContentTemplate  >  
 
 < span class =code-keyword><   / asp：UpdatePanel  >  
 <   / td  >  
 <   / tr  >  
 <   tr  >  
 <   td  >  
 <   / td  >  
 <   td    样式  =  margin-removed 40px >  
 <   asp：UpdatePanel     ID   =  UpdatePanel2    runat   = 服务器 >  
 <   ContentTemplate  >  
 <   div     id   =  DivButtonCreator      RUNAT   =  server >  
 
 
 
 <   / div  >  
 <   / ContentTemplate  >  
 
 <   / asp：UpdatePanel  >  
 <   / td  >  
 <   / tr  >  
 <   tr  >  
 <   td  >  
 <   / td  >  
 <  < span class =code-leadattribute> td     style   =  margin-removed 40px >  
 <   / td  >  
 <   / tr  >  
 <   / table  >  
 
 < ;   / div  >  
 <   / form  >  
 <   / body  >  
 <   / html  >  

解决方案

当您在asp没有加载新按钮时创建按钮然后你必须刷新你的asp页面或在负载中创建你的按钮。



见这个例子动态创建控制在ASP.NET 中[ ^ ]



祝你好运

可能是你试图挂钩处理程序的问题prerender中的一个按钮（在呈现页面之前）

尝试在事件渲染事件下挂钩事件。



可能是这样的排序你的问题

dynamic button not fire event in the page

problem : save button not fired ... how i could solve the problem.

Here''s the behind code

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

    protected void Page_PreRender(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            btnCreate_Click(sender, e);
            
        }
    }
    
    protected void btnCreate_Click(object sender, EventArgs e)
    {
        DivTextBoxCreator.Controls.Clear();
        HtmlTable htable = new HtmlTable();
        htable.BgColor = "Yellow";
        for (int i = 1; i <= int.Parse(TextBox1.Text); i++)
        {
            HtmlTableRow hRow = new HtmlTableRow();
            HtmlTableCell hCell = new HtmlTableCell();
            TextBox txtGenerator = new TextBox();

            txtGenerator.Text = "TextBox : " + i;
            hCell.Controls.Add(txtGenerator);
            hRow.Controls.Add(hCell);
            htable.Controls.Add(hRow);
        }
        DivTextBoxCreator.Controls.Add(htable);

        // create a Save Button
        Button buttonSave = new Button();
        buttonSave.ID = "buttonSave";
        buttonSave.Text = "Save";
        buttonSave. önClientClick = "return validate()";
        buttonSave.Click += new EventHandler(buttonSave_Click);
        buttonSave_Click(sender, e);
        DivTextBoxCreator.Controls.Add(buttonSave);
    }

    protected void buttonSave_Click(object sender, EventArgs e)
    {
        Response.Write("Test");
    }
}

Here''s the tags

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
    
        <table>
            <tr>
                <td>
                    Enter Number of TextBox</td>
                <td>
                    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td style="margin-removed 40px">
                    <asp:Button ID="btnCreate" runat="server" Text="Create" Width="139px" 

                        onclick="btnCreate_Click" />
                </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td style="margin-removed 40px">
                     </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td style="margin-removed 40px">
           
                        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                    <ContentTemplate>
                      <div id="DivTextBoxCreator"  runat="server">

                    </div>
                    </ContentTemplate>
                    
                    </asp:UpdatePanel>
                 </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td style="margin-removed 40px">
                   <asp:UpdatePanel ID="UpdatePanel2" runat="server">
                    <ContentTemplate>
                      <div id="DivButtonCreator"  runat="server">

                          

                    </div>
                    </ContentTemplate>
                   
                    </asp:UpdatePanel>
                </td>
            </tr>
            <tr>
                <td>
                     </td>
                <td style="margin-removed 40px">
                     </td>
            </tr>
        </table>
    
    </div>
    </form>
</body>
</html>

解决方案

Hi,

when you create the button in event the asp does not load your new button then you must refresh your asp page or you create your button in the load.

see this example Dynamically Created Controls in ASP.NET[^]

good luck

may be the problem is your trying to hook a handler to a button in prerender(before rendering of page)
try to hook the events under post render events.

may be this sorts out ur problem.

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