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  • OnPreRender(EventArgs e) 事件常用的方法

    protected override void OnPreRender(EventArgs e)

    1) 加入脚本

            protected override void OnPreRender(EventArgs e)
            {
                base.OnPreRender(e);
                this.Page.RegisterClientScriptBlock("InsertText", this.RenderScript());
       this.Page.RegisterOnSubmitStatement("StorePostBody", "StorePostBody();");
            }


    2) 设定标题
           

       protected override void OnPreRender(EventArgs e)
            {
                if(_mainTitle != null)
                    _mainTitle.Text = ResourceManager.GetString(Title);

                if(_subTitle != null)
                    _subTitle.Text = ResourceManager.GetString(SubTitle);

                base.OnPreRender (e);
            }

    3) 设定按钮客户端事件


      protected override void OnPreRender(EventArgs e)
      {
       Submit.Attributes.Add("onclick", "return SubmitSendToFriend('" + From.ClientID + "', '" + To.ClientID + "');");
      }

    4) 设定控件的状态

      protected override void OnPreRender(System.EventArgs e)
      {

        if(replyButton.Visible == false)
         ((Literal)FindControl("Sep1")).Visible = false;
        

        if(threadSubButton.Visible == false)
         ((Literal)FindControl("Sep3")).Visible = false;

        if(rateButton.Visible == false)
         ((Literal)FindControl("Sep2")).Visible = false;

       base.OnPreRender (e);

      }

    5) 加入脚本块

      protected override void OnPreRender(EventArgs e)
      {
       base.OnPreRender (e);
       StringBuilder sb = new StringBuilder();
       sb.Append(" ");
       sb.Append("  function ToggleRateMenu() {");
       sb.Append("    rateMenu = document.getElementById('RateMenu');");
       sb.Append("    rateButton = document.getElementById('RateButton');");
       sb.Append("");
       sb.Append("    rateMenu.style.left = getposOffset(rateButton, \"left\");");
       sb.Append("    rateMenu.style.top = getposOffset(rateButton, \"top\") + rateButton.offsetHeight;");
       sb.Append("");
       sb.Append("    if (rateMenu.style.visibility == \"hidden\") {");
       sb.Append("      rateMenu.style.visibility = \"visible\";");
       sb.Append("      rateMenu.style.display = 'block';");
       sb.Append("    } else {");
       sb.Append("      rateMenu.style.visibility = \"hidden\";");
       sb.Append("      rateMenu.style.display = 'none';");
       sb.Append("    }");
       sb.Append("  }");
       sb.Append("  ");
       sb.Append("  function getposOffset(what, offsettype){");
       sb.Append("  var totaloffset=(offsettype==\"left\")? what.offsetLeft : what.offsetTop;");
       sb.Append("  var parentEl=what.offsetParent;");
       sb.Append("  while (parentEl!=null){");
       sb.Append("    totaloffset=(offsettype==\"left\")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;");
       sb.Append("    parentEl=parentEl.offsetParent;");
       sb.Append("  }");
       sb.Append("  return totaloffset;");
       sb.Append("}");
       sb.Append(" ");
       Page.RegisterClientScriptBlock("RatePost",sb.ToString());
      }

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  • 原文地址:https://www.cnblogs.com/KUDO/p/443402.html
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