difference in creating toString()

I have created a .toString() on a custom object in two ways. Is there a
significant difference between two? they both seem to work. Is there a
reason to do one instead of the other?

This is done within the class definition:

this.toString = function(){
return _Name + " at " + _Address;
}

This is outside of the class def.
ExampleNamespace.cComplexCustomerType.prototype.toString = function(){
return this.getName() + " at " + this.getAddress();
}

--
Wallace B. McClure
"The Harder I Work, the Luckier I Get."
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Blog: http://weblogs.asp.net/wallym/Hi,

everything added through theprototype object is shared between instances. Thus, if you declare the toString() function by expanding prototype, you are sharing the same code, while if you declare the function using thethis pointer, you are duplicating code.

There's nothing wrong in declaring functions using this or prototype, but the thing that must be avoided is pointing to *objects* through prototype, for example arrays.

Consider the following declaration:

function myObject() {
}
myObject.prototype.myArray = new Array('Item1', 'Item2');

Now, create two instances:

var obj1 = new myObject();
var obj2 = new myObject();

Add something to obj1's array:

obj1.myArray.push('Item3_by_obj1');

and finally display the two arrays:

alert(obj1.myArray);
alert(obj2.myArray);

As you can see, both the instances shares the same reference to myArray.

Developing Atlas Friendly Controls

I'm working a custom control that requires client-side javascript. Is there a list of best practices for making a control Atlas friendly?

I'm currently using the ClientScriptManager to register the necessary scripts, but something is not working properly.

hello.

though i still haven't developed none, i think that an atlas control is supposed to implement the IScriptControl interface (this interface introduces a method that is called when you need to register the xml-script emitted by the control).

since there still is no info about it, i think that your best option is to use reflector and see how they implemented the atlas server controls.

If you are developing a server-side control that wishes to perform client-side logic or behavior then you can certainly approach it from a number of angles:

Simply generate your own JavaScript and register with the clientscript on the Page. then tie up your client-side events to functions therein

developer control --> custom TreeWeb into updatepanel

Hi, i have a classic custom treeweb and i have tried to insert it into atlas updatepanel.

All ok, but there is a little problem... now i explain at you.

When the tree is loading it's all ok , but at every postback the treeweb it loses the css_custom property (cssmouseover, cssdefault, etc...) in every inserted TreeElements

I have a base class control Treeweb where i insert the TreeElement in recursive mode, the custom css comes setting into base class Treeweb and they are save in viewstate (standard custom control), after in the render event of the TreeElements i add the attribute class with specify custom css.

Now with atlas this it seems not work because it lose information on this custom property for every TreeElemen.

How I can to arrange this property and to do it css persistent with atlas?

I have see that i must mapped the custom property in a new class that extend TargetControlPropertiesBase<Control> this is right ?

Deriving custom control from UpdatePanel doesnt work

I previously created multiple controls by deriving them from UpdatePanel using ATLAS (before BETA). Today I tried switching one of the controls to BETA and now I am getting PageRequestManagerParserErrorException error.

I created a very simple control to reproduce the problem:

===================================

namespace AtlasControls
{
[ToolboxData("<{0}:TestAtlasCtrl runat=server></{0}:TestAtlasCtrl>")]

public class TestAtlasCtrl : UpdatePanel, INamingContainer
{

public TestAtlasCtrl()
{
}

protected override void Render(HtmlTextWriter writer)
{
writer.WriteLine("Custom text is here...");
base.Render(writer);
}
}
}

=========================================

Here is the test page where I use the control:

==========================================

<%@dotnet.itags.org. Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="AtlasBeta_Test" %>
<%@dotnet.itags.org. Register TagPrefix="Custom" Namespace="AtlasControls" %
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<atlas:ScriptManager runat="server" ID="scriptManager" />
<div>
<Custom:TestAtlasCtrl ID="dlgForgotPassword" runat="server">
<ContentTemplate>
<asp:panel ID="panelForgotPasswordForm" runat="server">
<asp:TextBox id="txtEmail" Columns="40" MaxLength="255" CssClass="xTextBox" runat="server"/>
<asp:RequiredFieldValidator ID="vtxtEmail" ControlToValidate="txtEmail" EnableClientScript="false" runat="server" ErrorMessage="Email is required"></asp:RequiredFieldValidator>
<br /><br />

<center>
<asp:Button ID="btnOk" runat="server" CssClass="xSubmitPrimary" Text="OK" OnClick="btnOk_Click"></asp:Button>
</center>
</asp:panel>
</ContentTemplate>
</Custom:TestAtlasCtrl>
</div>
</form>
</body>
</html>
===================================

When I click OK in the form without entering 'Email' I get PageRequestManagerParserErrorException error. The error hints that it can be caused by Response.Write() and overriding HttpHandlers, but I am not doing any of that.

Regards,

Eric Popivker

I tested your codes and found the same issue as you said in your post.The issue is in the code line "writer.WriteLine("Custom text is here...");".In Ajax controls,you can not use the functionality which is similar toResponse.Writebecause there is no postback happening if you don't specify triggers.
Wish this can help u.

Delaying Content Load using Timer and UpdatePanel

I've created a custom template control that I'm trying to use to delay content loading on a page for long running controls.

Here:

1public sealed class DelayedContentLoader : WebControl, INamingContainer
2 {
3private MultiView mvContent =new MultiView();
45private int interval = 10000;
6public int Interval
7 {
8get {return interval; }
9set { interval =value; }
10 }
1112public delegate bool LoadContentHandler();
13public LoadContentHandler OnLoadContent;
1415private ITemplate loadingTemplate;
16 [TemplateContainer(typeof(LoadingView))]
17public ITemplate LoadingTemplate
18 {
19get {return loadingTemplate; }
20set { loadingTemplate =value; }
21 }
2223private ITemplate loadFailedTemplate;
24 [TemplateContainer(typeof(LoadFailedView))]
25public ITemplate LoadFailedTemplate
26 {
27get {return loadFailedTemplate; }
28set { loadFailedTemplate =value; }
29 }
3031private ITemplate contentTemplate;
32 [TemplateContainer(typeof(ContentView))]
33public ITemplate ContentTemplate
34 {
35get {return contentTemplate; }
36set { contentTemplate =value; }
37 }
3839protected override void OnInit(EventArgs e)
40 {
41if (loadingTemplate !=null)
42 {
43 LoadingView loadingViewContainer =new LoadingView();
44 loadingTemplate.InstantiateIn(loadingViewContainer);
45 mvContent.Views.Add(loadingViewContainer);
46 }
4748if (contentTemplate !=null)
49 {
50 ContentView contentViewContainer =new ContentView();
51 contentTemplate.InstantiateIn(contentViewContainer);
52 mvContent.Views.Add(contentViewContainer);
53 }
54else
55 throw new Exception("A Content Template must be specified.");
5657if (loadFailedTemplate !=null)
58 {
59 LoadFailedView loadFailedViewContainer =new LoadFailedView();
60 loadFailedTemplate.InstantiateIn(loadFailedViewContainer);
61 mvContent.Views.Add(loadFailedViewContainer);
62 }
63 }
6465protected override void OnLoad(EventArgs e)
66 {
67 UpdatePanel updatePanel =new UpdatePanel();
68 updatePanel.UpdateMode = UpdatePanelUpdateMode.Always;
6970 mvContent.ActiveViewIndex = 0;
7172 updatePanel.ContentTemplateContainer.Controls.Add(mvContent);
7374 Timer timer =new Timer();
75 timer.ID ="timerDelayedContentLoader";
76 timer.Interval = interval;
77 timer.Tick +=new EventHandler(timer_Tick);
7879 updatePanel.ContentTemplateContainer.Controls.Add(timer);
8081 Controls.Add(updatePanel);
82 }
8384public override Control FindControl(string id)
85 {
86 Control ctrl = mvContent.Views[1].FindControl(id);
87if (ctrl !=null)
88return ctrl;
8990 ctrl = mvContent.Views[2].FindControl(id);
91if (ctrl !=null)
92return ctrl;
9394 ctrl = mvContent.Views[0].FindControl(id);
9596return ctrl;
97 }
9899private void timer_Tick(object sender, EventArgs e)
100 {
101bool loadedContentSuccessfully =false;
102if (OnLoadContent !=null)
103 loadedContentSuccessfully = OnLoadContent();
104105// Stop the timer.106 Timer timer = FindControl("timerDelayedContentLoader")as Timer;
107if (timer !=null)
108 timer.Enabled =false;
109110int visiblePlh = loadedContentSuccessfully ? 1 : 2;
111 mvContent.ActiveViewIndex = visiblePlh;
112 }
113 }

The control does work, but once the first 'panel' loads I'm getting this error:

Error: Sys.ScriptLoadFailedException: The script 'http://localhost:2059/WebResource.axd?d=2969z1Qx3dbsV5nCF1BRcXhpF5ub86-cDZ-FaGYdZEBQbKzZVJb7tl6DB7CRlXIMyp8MDajf0oi_5PQ_Zb35Pg2&t=633181289164114804' failed to load. Check for:
 Inaccessible path.
 Script errors. (IE) Enable 'Display a notification about every script error' under advanced settings.
 Missing call to Sys.Application.notifyScriptLoaded().
Source File: http://localhost:2059/ScriptResource.axd?d=w7roB_KjU8DhSirRDxfFxPRhP-DUqImf_4Nd1a5Co3kx1o511QAFqGXxMtkfZR8UkArHbaLDYRdK8lHjJK-ARWQArhEXy5Ydco_GHuMUgH41&t=633120912402558276
Line: 3311

The error kills all of the JavaScript on the page - others delayed content loaders stop loading and all other AJAX stuff ceases to work. The line that is referenced is this line #10 below:

// MicrosoftAjax.js
// Microsoft AJAX Framework. 

1function Sys$_ScriptLoader$_raiseError(multipleCallbacks) {
2 var callback = this._scriptLoadFailedCallback;
3 var scriptElement = this._currentTask.get_scriptElement();
4 this._stopLoading();
5
6 if(callback) {
7 callback(this, scriptElement, multipleCallbacks);
8 }
9 else {
10throw Sys._ScriptLoader._errorScriptLoadFailed(scriptElement.src, multipleCallbacks);
11 }
12 }

Is there anything that can be done here? By the way, this control is inside of a Web Part. If I remove all the Web Part stuff, I don't get the error but only one of my delayed content loading controls finishes loading.

Any help would be much appreciated.

Thanks!

Has anyone tried to do this?

Hi

Ok,Just do it like this:

<%@. Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
}
</script>

<script type="text/javascript">
function delayLoad()
{
document.getElementById("<%= Button1.ClientID %>").click();
document.getElementById("<%= UpdateProgress1.ClientID %>").style.display = "block";
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body onload="setTimeout('delayLoad()',3000)">
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<div visible="true"><asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /></div>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
Waiting...........
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>

Thanks:)

How is that the same as what I was trying to do? Unless you're saying I need to have my update panel's UpdateMode set to conditional. Are you?

Hi,

In my code,I delay by 3 second to load the content.

It's the same as following code:

<%@. Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
}

protected void Timer1_Tick(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
Timer1.Enabled = false;
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<div visible="true">
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /></div>
<asp:Timer ID="Timer1" runat="server" Interval="3000" OnTick="Timer1_Tick">
</asp:Timer>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
Waiting...........
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>

A timer for an updatepanel.we can do it.

I know you just want to creat a contorl to include a updatepanel and a timer,I'll do it for you later.

OK

I have done it for you now.

bur I 'm using webcontrol rather than server control,I think it is more simple:)

The code :

The page:

<%@. Page Language="C#" %>

<%@. Register src="http://pics.10026.com/?src=WebUserControl5.ascx" TagName="WebUserControl5" TagPrefix="uc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
protected bool WebUserControl5_1_LoadContent(object sender, EventArgs e)
{
try
{
((WebUserControl5)sender).myContent = "OK..........";
}
catch
{
return false;
}
return true;
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<uc1:WebUserControl5 ID="WebUserControl5_1" runat="server" OnLoadContent="WebUserControl5_1_LoadContent" />
</div>
<div>
<uc1:WebUserControl5 ID="WebUserControl5_2" runat="server" OnLoadContent="WebUserControl5_1_LoadContent" />
</div>
<div>
<uc1:WebUserControl5 ID="WebUserControl5_3" runat="server" OnLoadContent="WebUserControl5_1_LoadContent" />
</div>
<div>
<uc1:WebUserControl5 ID="WebUserControl5_4" runat="server" OnLoadContent="WebUserControl5_1_LoadContent" />
</div>
</form>
</body>
</html>

The control:

<%@. Control Language="C#" ClassName="WebUserControl5" %>

<script runat="server">
protected void Timer1_Tick(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
bool loadedContentSuccessfully = false;
if (LoadContent != null)
loadedContentSuccessfully = LoadContent(this,e);

// Stop the timer.
Timer1.Enabled = false;

int visiblePlh = loadedContentSuccessfully ? 1 : 2;
MultiView1.ActiveViewIndex = visiblePlh;
}

public delegate bool LoadContentHandler(object sender, EventArgs e);
public event LoadContentHandler LoadContent;
public string myContent
{
set
{
TextBox2.Text = value;
}
}
</script>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Timer ID="Timer1" runat="server" Interval="3000" OnTick="Timer1_Tick">
</asp:Timer>
<asp:MultiView ID="MultiView1" runat="server" ActiveViewIndex="0">
<asp:View ID="LoadingView" runat="server">
Loading...........</asp:View>
<asp:View ID="ContentView" runat="server">
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox></asp:View>
<asp:View ID="LoadFailedView" runat="server">
Failed...........</asp:View>
</asp:MultiView>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
Waiting...........
</ProgressTemplate>
</asp:UpdateProgress>

Works cool.....:)

Thanks

Not exactly what I was looking for since I want to build something that's a bit more re-usable than a simple ASCX. Another issue I found was that if I had two instances of the same templated control, say one names 'ctrl1' and the other named 'ctrl2' the timer would just keep updating one or the other like this...

page loads

--ctrl 1 loaded after delayed

--ctrl2 loaded after delayed (ctrl1's content hidden)

--ctrl1 loaded after delayed (ctrl2's content hidden)

--and so on

Very strange.

Delayed content loading is BRILLIANT!....IF you arent delaying an async callback such as a databind. What if you would like to load the graphical content FIRST and then populate a combobox with its records as the delayed content - The browser freezes until the databind is complete! Thats fine if your only VIEWING the page but what if the user would like to start entering input whilst waiting for a Suburb Dropdown to populate....

Hi Delorenzo,

Im also trying for the same. Im trying to delay content loading using ajax controls in Custom control. I have no Idea how to do it, if u got the solution for this problem then plz let me knw.

Thanks in Advance,

Rajak Shaik.

I couldn't get this to work exactly as I wanted it to, so I scrapped it and switched to a solution using JavaScript and Web Services with Prototype and Scriptaculous (for my animation). The solution works great!

Hi Delorenzo,

Thanks for replying. Can u plz tell me how it can be done using Javascript and Webservices, if possible with code.

Thanks in Advance,

Thanks & Regards,

Rajak Shaik.

Another question:

Can I do something like this below? I'd like to update the time as a process is running. However, the time on the edit box only changes (or updates) on the last one. I've tried UpdatePanel1.Update() as well and this doesn't seem to get the refresh to happen either.

protected void Timer1_Tick(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
System.Threading.Thread.Sleep(3000);
TextBox1.Text = DateTime.Now.ToString();
Timer1.Enabled = false;
}

Thanks,

Gary

Hi Gary...

I am a little unclear on what you are trying to achieve. Did you want to show the amount of time that a process takes to complete? or would you just like to show the current time and refresh it every 3 seconds?

Perhaps set the timer to 3000 and then:

protected void Timer1_Tick(object sender, EventArgs e)
{
TextBox1.Text = DateTime.Now.ToString();

Updatepanel.update

}

------
Codey

Well- not exactly so let me ask my real question. I hate to get a little off the posting subject, but hopefully it's helpful.

Inside the timer I'd like to run a loop and when each loop is done then I'd like to update the date in the text box. Actually I don't really want to use a timer either, but if I can make it work that way that would be ok too. It only seems to update the text box at the end and doesn't want to update it after each loop.

protected void Timer1_Tick(object sender, EventArgs e)
{

for (int i = 0; i < 10; i++)

{

CallProcess(i);

TextBox1.Text =DateTime.Now.ToString();

UpdatePanel1.Update();

}

Thanks!!

Gary

The Update wont occur until the postback is complete, therefore the final value that you assign the textbox will be the value that is displayed.

Even though you are forcing an update on the updatepanel, that update wont display until the page completes its postback.

I see that you are trying to place a time stamp in a textbox evertime the CallProcess routine completes.

You probably need to consider multiple textboxes and a Select Case statement:

For i = 1To 10

CallProcedureHere(i)

SelectCase i

Case 1
Textbox1.text = Now
Case 2
textbox2.text = Now

EndSelect

Next

Delay content loading using ajax in Custom control?

Hi All

I Want to Delay content loading using ajax if the running controls are taking so much time in Custom control. I did this in WebPage but i have no idea about how it should be done in an Custom control. The data in custom control is coming from webservice which is taking long time, in the mean while i want to display an image saying "loading..." for it using ajax. Can anyone plz help me out.

Thanks in Advance,

Thanks & Regards,

Rajak Shaik.

Hi

I assume that you are not familiar with the AJAX UpdateProgress control.

Please find this link to see a demo and sample code. You can do it exactly what you wanted to do with this.

http://www.asp.net/AJAX/Documentation/Live/tutorials/UpdateProgressTutorials.aspx

hello.

well, that won't help him.

even though i don't agree there are some guys that are doing something like this:

1. wrap the part that has the user control with an updatepanel

2. don't make the call for loading the data when the user controlo is loaded for the 1st time

3. when the page loads on the client, they refresh the updatepanel (if you have an updateprogress, it'll kick in automatically in this case)

4. during a partial postback, you can perform the call

notice that I'm against this approach, since i believe that ajax programming should envolve mainly client side programming...

Hi,

This question has been discussed athttp://www.codeproject.com/Ajax/DelayedContentLoading.asp &http://forums.asp.net/t/1127147.aspx

Please check out these links to get some idea,

Best Regards,

Hi All,

Thanking u all for replying. I able to do this using UpdateProgress, and Script. Actually my requirement was little bit changed, i.e. i was asked to Delay content loading in case of UserControl, which is having Custom controls init. Whenever an event of Usercontrol fired then i need to display this image 'loading..." until the data comes. So i have written the code below on the webpage(which is having this Usercontrol in it).

<asp:UpdatePanelID="UpdatePanel1"runat="server">

<ContentTemplate>

<uc1:PropertiesID="usrDestination"runat="server"PageUri=""ParentUri=""/>

</ContentTemplate>

</asp:UpdatePanel>

<asp:UpdateProgressID="UpdateProgress1"AssociatedUpdatePanelID="UpdatePanel1"runat="server">

<ProgressTemplate>

<asp:imagerunat="server"ID="image2"ImageAlign="middle"ImageUrl="spinner.gif"/>

<asp:Labelrunat="Server"ID="label2"Font-Size="smaller"ForeColor="orange"Text="Loading..."/>

</ProgressTemplate>

//Script in the Body

<scripttype="text/javascript">

Sys.Application.add_load(ApplicationLoadHandler);

function ApplicationLoadHandler(sender, args)

{

var prm = Sys.WebForms.PageRequestManager.getInstance();

prm.add_initializeRequest(initRequest);

prm.add_endRequest(endRequest);

}

function initRequest(sender, args)

{

$get('UpdateProgress1').style.display ='block';

}

function endRequest(sender, args)

{

$get('UpdateProgress1').style.display ='none';

}

</script>

This is Working fine for me. I would be happy if this code helps to anyone that is in need. Thank u once again for u all for helping me in finding out the solution for this problem.

Thanks & Regards,

Rajak Shaik.

decimal data type

Hi all,

I am having trouble working with the decimal data type in the client side js. I am returning this custom object that has decimal properties. When I try to ready the value of these properties in javascript I get an object type.

How can I get the values?

Decimal should be working well. e.g. I just tested with a simple EchoDecimal method, and it correctly round trips the number I pass in:

[WebMethod]

publicDecimal EchoDecimal(Decimal de) {

return de;

}

What do you mean by "I get an object type"? Have you tried using fiddler to make sure the data over the wire looks proper?

David