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所以当我尝试通过文件菜单构建我的网站时，我遇到了标题中提到的错误。导致这种情况的代码如下（出现在 body 标记中的 JavaScript）：

            if(editedRow != null)
            {
                var SundayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_SunLocale.ClientID %>");
                var MondayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_MonLocale.ClientID %>");
                var TuesdayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_TuesLocale.ClientID %>");
                var WednesdayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_WedLocale.ClientID %>");
                var ThursdayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_ThursLocale.ClientID %>");
                var FridayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_FriLocale.ClientID %>");
                var SaturdayLoc = $find("<%= FieldOpsScheduler_ctl00_ctl05_RCB_SatLocale.ClientID %>");

                if(currentCombo == "OFF" || currentCombo == "OFFICE")
                {                
                    if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_SunActivity")
                    {
                        SundayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_MonActivity")
                    {
                        MondayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_TuesActivity")
                    {
                        TuesdayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_WedActivity")
                    {
                        WednesdayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_ThursActivity")
                    {
                        ThursdayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_FriActivity")
                    {
                        FridayLoc.disable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_SatActivity")
                    {
                        SaturdayLoc.disable();
                    }

                    sender.hideDropDown();
                }
                else if(currentCombo != "OFF" && currentCombo != "OFFICE")
                {
                    if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_SunActivity")
                    {
                        SundayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_MonActivity")
                    {
                        MondayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_TuesActivity")
                    {
                        TuesdayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_WedActivity")
                    {
                        WednesdayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_ThursActivity")
                    {
                        ThursdayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_FriActivity")
                    {
                        FridayLoc.enable();
                    }
                    else if(rcbID == "FieldOpsScheduler_ctl00_ctl05_RCB_SatActivity")
                    {
                        SaturdayLoc.enable();
                    }

                    sender.hideDropDown();
                } 
            }

现在真正奇怪的（也许是这种情况发生的根本原因）是，当我删除上面的代码时，恰好有一半指出那些 Web 表单元素 ID 名称的错误消失了。但是只有一半——不是全部，这没有意义，因为我摆脱了所有要求 Web 表单元素 ID 的 JavaScript 代码部分。

删除所有相关的 JavaScript 并双击 VS2005 中剩余的 7 条错误消息后，它们都将我带到页面的第一行代码，即：

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="DistrictSchedule.aspx.vb" Inherits="FieldOperations_DistrictSchedule" %>

Myself nor my coworker knows what the deuce is going on. When I get rid of half of the errors, at least the page will execute. However it all SHOULD work, judging by the code..

Additional Error Info: I should mention that those web form element IDs that I'm trying to find exist ONLY when my RadGrid is in edit mode, so it would make sense that they're not originally there to begin with. Regardless, this should NOT be causing a site-crippling error, although for whatever reason it is. Lastly, the specific lines throwing the error are the ones utilizing $find, and the lines utilizing the vars that $find gets values for throw the error too.

Whoever out there who can tell me what is going on would be a MAJOR help. I thank you in advance.

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2 回答 2

1

So I got my bright-idea for a fix to this when I randomly browsed some other page looking for information regarding find() and Telerik. I noticed in some cases you have things like:

var whatever = $find("<%= SomeControlIDDeclaredServerSide.ClientID %>");

And in other cases you have things like:

var whatever = $find("SomeControlIDAsDisplayedOnWebpage");

Turns out, these two quite similar lines of code are not interchangeable, though at first-glance one might think they are. Specifically what got rid of ALL of these utterly-annoying errors in my case was to use the second line without the brackets and percent signs.

My theory as to why line two works in my case and not line one, is that when selecting Compile/Build Website, if you utilize code like line one, the compiler expects your object to be created via markup syntax on the .aspx page immediately at runtime. In my case, the "FieldOpsScheduler_blahblahblah" was being dynamically created when my RadGrid gets put into edit mode (so, not immediately at runtime).

Anyway hopefully my experience will help someone out there who runs into this problem or a similar one.

于 2010-07-16T13:55:32.693 回答
1

Glad you found your own solution. For further clarification, here's what's happening.

<%= %>

The above is shorthand for Response.Write. So, when you use the following line of code:

var whatever = $find("<%= SomeControlIDDeclaredServerSide.ClientID %>");

You are telling your ASPX page to get the ClientID of your server-side control and then output that ID to your JavaScript when the page is processed, resulting in something like this on the rendered page:

var whatever = $find("ctl00_ctl05_SomeControlIDDeclaredServerSide");

This is often used when doing JavaScript programming with ASP.NET to get the client-side HTML ID of server-side controls because ASP.NET can dynamically adjusts HTML IDs at runtime. This code ensures you always have the correct ID in JavaScript regardless of ASP.NET container naming adjustments.

If your client ID is static (what you set at design-time is what renders to the page), then you don't need the ClientID look-up and can instead write this:

var whatever = $find("SomeControlIDAsDisplayedOnWebpage");

Where "SomeControlID..." is the actual HTML ID of the control you're targeting. The JavaScript $find method will look for that HTML ID directly and get a reference to the HTML object.

Hope that helps with the "why."

于 2010-07-20T20:19:49.727 回答