单击按钮后获取运行时生成的复选框值 [英] Get runtime genrated checkbox value after clicking on a button

问题描述

  protected   void  btnSet_Click（对象发​​件人，EventArgs e）
 {
 CheckBox chkBx =  new  CheckBox（）; 
 chkBx.ID =   chk1; 
 appentDiv.Controls.Add（chkBx）; 
} 
 
 受保护  void  btnGet_Click（ object  sender，EventArgs e）
 {
 CheckBox n =  this  .appentDiv.FindControl（  chk1） as  CheckBox; 
} 

可以帮忙从这里获取复选框值...？

请回复...



问候

Sujeet Singh

解决方案

它为我工作

  protected   void  btnGet_Click（对象发​​件人，EventArgs e）
 {
 CheckBox n =（CheckBox） this  .appentDiv.FindControl（  chk1）; 
} 

你将获得null $

  this  .appentDiv.FindControl（  chk1） as  CheckBox 

原因是回发后动态添加的控件将无法使用。 ..

所以你需要使用Session或Viewstate处理这个...

请检查这些链接...



解决PostBack动态控制问题 [ ^ ]



http://chiragrdarji.wordpress.com/2009/05/20/maintain-v iewstate-for-dynamic-controls-across-the -backback / [ ^ ]



http://www.codestructs.com/tag-blogger-com-1999-blog-2555797619867133640-post-2780447821170012635 [ ^

protected void btnSet_Click(object sender, EventArgs e) 
  { 
         CheckBox chkBx = new CheckBox(); 
         chkBx.ID = "chk1"; 
      appentDiv.Controls.Add(chkBx);
  } 

protected void btnGet_Click(object sender, EventArgs e) 
{ 
       CheckBox n = this.appentDiv.FindControl("chk1") as CheckBox;  
} 

Could any please help to get checkbox value from here...?
Please reply...

Regards
Sujeet Singh

解决方案

Its working for me

protected void btnGet_Click(object sender, EventArgs e) 
{ 
       CheckBox n = (CheckBox)this.appentDiv.FindControl("chk1") ;  
} 

You will be getting null at

this.appentDiv.FindControl("chk1") as CheckBox

The reason is Dynamically added controls will not be available after postback....
So you need to handle this by using Session or Viewstate...
Please check these links...

Solve Dynamic Control Problem With PostBack[^]

http://chiragrdarji.wordpress.com/2009/05/20/maintain-viewstate-for-dynamic-controls-across-the-postback/[^]

http://www.codestructs.com/tag-blogger-com-1999-blog-2555797619867133640-post-2780447821170012635[^]

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