众果搜的博客

脚踏大地,仰望星空,致力于在线网络工具的开发与普及,以及其他思考

Search(博客搜索)

热文排行

最近发表

最新评论及回复

« 房屋光照计算器上线英语单词纵横字谜生成器上线 »

控件查找-控件访问有用的方法

 今天找了较长时间,老是用遍历的方法,很是费时间。如果不是对控件逐个操作,完全可以用这个方法。这里记录一下,用来在页面或者其他容器控件中找其他控件。vb或者C#、C shap中的控件查找,尤其是当动态生成了控件ID的时候,就需要这个,适合asp.net或.net Framework的windows应用程序。

The following example defines a Button1_Click event handler. When invoked, this handler uses the FindControl method to locate a control with an ID property of TextBox2 on the containing page. If the control is found, its parent is determined using the Parent property and the parent control's ID is written to the page. If TextBox2 is not found, "Control Not Found" is written to the page.
Security Note
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
C#代码:
private void Button1_Click(object sender, EventArgs MyEventArgs)
{
      // Find control on page.
      Control myControl1 = FindControl("TextBox2");
      if(myControl1!=null)
      {
         // Get control's parent.
         Control myControl2 = myControl1.Parent;
         Response.Write("Parent of the text box is : " + myControl2.ID);
      }
      else
      {
         Response.Write("Control not found");
      }
 
vb代码:
Private Sub Button1_Click(sender As Object, MyEventArgs As EventArgs)
   ' Find control on page.
   Dim myControl1 As Control = FindControl("TextBox2")
   If (Not myControl1 Is Nothing)
      ' Get control's parent.
      Dim myControl2 As Control = myControl1.Parent
      Response.Write("Parent of the text box is : " & myControl2.ID)
   Else
      Response.Write("Control not found.....")
   End If
   End Sub

发表评论:

◎欢迎参与讨论,请在这里发表您的看法、交流您的观点。

Powered By Z-Blog 1.8 Spirit Build 80722 Code detection by Codefense

Copyright www.zhongguosou.com. Some Rights Reserved.