some common used tips in web development

待我称王封你为后i 2021-11-26 11:54 176阅读 0赞

Been working on the post-production phase in a web project recently, and some features can be really nice to have..  
  
**1. Prevent duplication form post when you insert a new record.**  
[http://www.eggheadcafe.com/PrintSearchContent.asp?LINKID=98][http_www.eggheadcafe.com_PrintSearchContent.asp_LINKID_98]  
  
<SCRIPT language=JavaScript >   
                    var submitcount=0;     
                   function checkSubmit()  
                   \{       
                    if (submitcount == 0)  
                       \{ submitcount++; return true; \}    
                    else  
                       \{ alert('This form has already been submitted.' ); return false; \}   
                    \}   
</SCRIPT>  
  
<form name=frmSubmit method=post onSubmit=" return checkSubmit();" action="mypage.asp" >  
  
  
**2. A simple progress bar to wait the next page...**  
[http://blogs.crsw.com/mark/articles/642.aspx][http_blogs.crsw.com_mark_articles_642.aspx]  
[http://blogs.crsw.com/mark/samples/BusyBoxDemo/Default.aspx][http_blogs.crsw.com_mark_samples_BusyBoxDemo_Default.aspx]  
  
 All that is need for this page is:  
\- a single line of code to reference the busy box javascript.  
\- a small javascript statement in the body tag's onbeforeunload event.  
\- a small iframe tag.  
\- a single line of code to instantiate our busy box object.  
\- a BusyBox.htm file to reference (or any name you like).  
  
  
**3. Open IIS6 compression to make asp.net faster**  
you need to manually modify the iis6 config file, just following through the links  
[http://www.dotnetdevs.com/articles/IIS6compression.aspx][http_www.dotnetdevs.com_articles_IIS6compression.aspx]  
[http://support.microsoft.com/?id=322603][http_support.microsoft.com_id_322603]

4. Make the block collapsable  
example is in a custom control format  
  
//this is the javascript function to be emitted.  
  private string getJsScript()  
  \{  
   StringBuilder sb = new StringBuilder();  
   sb.Append("<script>\\n");  
   sb.Append("function collapse(id)\{\\n");  
   sb.Append("var ul = document.getElementById(id);\\n");  
   sb.Append("ul.style.display = (ul.style.display == \\"block\\") ? \\"none\\" : \\"block\\";\\n");  
   sb.Append("\}\\n");  
   sb.Append("</script>");

return sb.ToString();  
  \}  
  
//release the javascrip  
  protected override void OnPreRender(EventArgs e)  
  \{  
   Page.RegisterClientScriptBlock("collapseScript", getJsScript());  
   base.OnPreRender(e);  
  \}  
  
  
//in the create control function add the javascript function call when click  
  protected override void Render(HtmlTextWriter writer)  
  \{     
     this.EnsureChildControls();  
     string ulId = "leftmenusep";

writer.AddAttribute("src", CollapseIconLocation);  
     writer.AddAttribute("onclick", String.Format("javascript:collapse('\{0\}');", ulId));  
     writer.RenderBeginTag("img");  
     writer.RenderEndTag();  
\}

转载于:https://www.cnblogs.com/gozh2002/archive/2005/07/13/192085.html

[http_www.eggheadcafe.com_PrintSearchContent.asp_LINKID_98]: http://www.eggheadcafe.com/PrintSearchContent.asp?LINKID=98
[http_blogs.crsw.com_mark_articles_642.aspx]: http://blogs.crsw.com/mark/articles/642.aspx
[http_blogs.crsw.com_mark_samples_BusyBoxDemo_Default.aspx]: http://blogs.crsw.com/mark/samples/BusyBoxDemo/Default.aspx
[http_www.dotnetdevs.com_articles_IIS6compression.aspx]: http://www.dotnetdevs.com/articles/IIS6compression.aspx
[http_support.microsoft.com_id_322603]: http://support.microsoft.com/?id=322603