Render - Server Control Emitting Server Side Tags?
Feb 19, 2010
I'm new to writing custom ASP.NET server controls, and I'm encountering the following issue:
I have a control that inherits from System.Web.UI.HtmlControls.HtmlGenericControl. I override the control's Render method, use the HtmlTextWriter to emit some custom HTML (basically a TD tag with some custom attributes), and then call the case class' Render method.
Using the control:
<dc:Header id="header1" runat="Server" DataColumn="MemberNumber" Width="30%">Member Number</dc:Header >
The problem is that when I view my rendered HTML, the server tag is emitted to the client as well (right after the TD tag):
<dc:Header id="ctl00_ContentPlaceHolder_testData1_testData1_header1">Member Number</dc:Header>
How do I prevent this from happening?
View 1 Replies
Similar Messages:
Nov 17, 2010
I'm working on a custom ServerControl, I've created it like below :
[ParseChildren(true), PersistChildren(true)]
[ToolboxData("<{0}:Menu runat="server"></{0}:Menu>")]
public class Menu : WebControl
{
.....
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public MenuItem MenuItems { get; set; }
}
[ParseChildren(true), PersistChildren(true)]
public class MenuItem : WebControl
{
......
[PersistenceMode(PersistenceMode.InnerProperty)]
public MenuItem SubMenuItems
{
get
{
if (_SubMenuItems == null) return new MenuItem();
return _SubMenuItems;
}
set
{
_SubMenuItems = value;
}
}
private MenuItem _SubMenuItems;
[TemplateContainer(typeof(MenuItem))]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template { get; set; }
}
<%@ Register Assembly="JQueryMenu" Namespace="JQueryMenu" TagPrefix="MdsMenu" %>
<MdsMenu:Menu ID="Menu1" runat="server">
<AnimationItems AnimationSpeed="Fast" AnimationType="Opacity_Height" DropShadow="true"
Delay="1000" />
<MdsMenu:MenuItem ID="MenuItem1" runat="server" Text="MenuItem 01">
<MdsMenu:MenuItem runat="server">
<Template>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:CheckBox ID="CheckBox1" runat="server" />
</Template>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem2" runat="server" Text="MenuItem 01">
<MdsMenu:MenuItem ID="MenuItem3" runat="server">
<Template>
<asp:Button ID="Button2" runat="server" Text="Button" />
<asp:CheckBox ID="CheckBox2" runat="server" />
</Template>
<MdsMenu:MenuItem ID="MenuItem5" runat="server" Text="MenuItem 05">
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem6" runat="server" Text="MenuItem 06">
</MdsMenu:MenuItem>
<MdsMenu:MenuItem ID="MenuItem4" runat="server">
<Template>
<asp:Image ID="Image1" runat="server" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</Template>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
</MdsMenu:MenuItem>
</MdsMenu:Menu>
Now, How can I Parse it and render it in RenderContent method ? !!!
The following method is always throw the first Exception, it means this.Controls is always empty !!! How can I do it and how I can access to the nested children in RenderControl method ?
public class Menu : WebControl
{
....
public override void RenderControl(HtmlTextWriter output)
{
if (!this.HasControls())
throw new Exception("Controls are empty");
....
}
}
View 1 Replies
Apr 8, 2010
The code for the asp.net page is:
<div class="facebox_content">
<% if (CurrentUser.Role == "Free")
{
%>
<table cellpadding="0" cellspacing="0" style="border-collapse:collapse;width:380px;">
<tr>
<td>
User Name :
</td>
<td>
Membership Cost :
</td>
</tr>
<tr>
<td style="width:190px;">
<asp:TextBox ID="txtUserName" Enabled="false" runat="server" Text="<%= CurrentUser.Name %>"/>
</td>
<td style="width:190px;">
<asp:TextBox ID="txtCost" Enabled="false" runat="server" Text="2000"/>
</td>.........
View 1 Replies
Apr 19, 2010
I have an ASP.net page which contains some controls.
I generate this controls by code, [Actually I have a method which uses a stringBuilder and add Serverside tag as flat string on it]
My page shows the content correctly but unfortunately my controls became like a Client-side control
For example I had a LoginView on my generated code which dosen't work, and also I had read some string from LocalResources which dosen't appear on the page What Should I do to make my generating method correct
here is the code
protected string CreateSubSystem(string id, string roles, string AnonymousTemplateClass, string href, string rolesContentTemplateClass, string LoggedInTemplateClass)
{
StringBuilder sb = new StringBuilder();
sb.Append("<div class="SubSystemIconPlacement" id="");
sb.Append(id);
sb.Append(""><asp:LoginView runat="server" ID="");
sb.Append(id);
sb.Append(""><AnonymousTemplate><div class="");
sb.Append(AnonymousTemplateClass);
sb.Append(""></div><asp:Label ID="lblDisabled");
sb.Append(id);
sb.Append("" runat="server" SkinID="OneColLabel" meta:resourcekey="lbl");
sb.Append(id);
sb.Append("" /></AnonymousTemplate><RoleGroups><asp:RoleGroup Roles="");
sb.Append(roles);
sb.Append(""><ContentTemplate><a class="ImageLink" href="");
sb.Append(href);
sb.Append(""><div class="");
sb.Append(rolesContentTemplateClass);
sb.Append(""></div></a><asp:HyperLink runat="server" CssClass="SubSystemText" ID="lnk");
sb.Append(id);
sb.Append(" NavigateUrl="~/");
sb.Append(href);
sb.Append(" " meta:resourcekey="lbl");
sb.Append(id);
sb.Append("" /></ContentTemplate></asp:RoleGroup></RoleGroups><LoggedInTemplate><div class="");
sb.Append(LoggedInTemplateClass);
sb.Append(""></div><asp:Label runat="server" SkinID="OneColLabel" ID="lblDisabledLoggedIn");
sb.Append(id);
sb.Append("" meta:resourcekey="lbl");
sb.Append(id);
sb.Append("" /></LoggedInTemplate></asp:LoginView>");
sb.Append("</div>");
return sb.ToString();
}
I also use this method on page_PreRender event
View 1 Replies
Dec 12, 2010
I have a loop in JS, and I want to pass each parameter in that loop to a function in ASP.NET in the codebehind.
something like that:
for (var i = 0; i < elements.length; i++)
{
}
And I want to pass a function in <%%> the elements[i].
How can I do that?
View 2 Replies
Jan 13, 2011
I'm trying to insert some html 'div' tags inside a tabcontainer from server side. I haven't seen anything similar on the net. Here's the situation:
I have the following TabContainer on a form:
<cc1:TabContainer ID="TabContainer1" runat="server">
<cc1:TabPanel HeaderText="Person">
<ContentTemplate>
<div id="Test">
</div>......
How can I acheive that? If it's not possible, what other alternatives do I have? The most important requirement for me is to allow the user to remove the data by clicking on it.
View 4 Replies
Dec 10, 2010
I need to do stuff after my page is rendered in the browser. In detail, i need to send email/sms and other non-browser related stuff, but the operation takes time, and i dont want my visitors waiting 5-8s for the success message.I have tried putting the "After Rendering Code" in the page Unload event. That seems to work - but only on localhost. It does not work on our production server.So i figgured, maybe this is some IIS setting? I've also read that it's up to the browser, if it will show th epage after rendering is complete - or wait for the whole package to end.So i tried to end the package with Response.end before my "A-R-C", but that just killed it.
View 3 Replies
Nov 6, 2010
i want make html table in format so i used follwing code but it just print tags(rather than analyze them as html and give appropriate output )
[Code]....
Output got when tried to use TransList.ToString() output got was
<html> <head> </head><body><table><tr><td>1</td><td>11/24/2010 12:00:00 AM</td><td>Paypal</td><td>30</td></tr><tr><td>2</td><td>11/24/2010 12:00:00 AM</td><td>Paypal</td><td>300</td></tr><tr><td>3</td><td>12/10/2010 12:00:00 AM</td><td>Paypal</td><td>240</td></tr></table></body></html>
View 4 Replies
Jun 3, 2013
I have created a javascript function along with the scripts in a class file using string builder as follows
public static string ShowAlertMessage(string pHeader, string pError)
{
StringBuilder strScript = new StringBuilder();
strScript.Append("<script type="text/javascript" src="").Append("Scripts/jquery-1.4.1.js").Append(""></script>");
strScript.Append("<script type="text/javascript" src="").Append("Scripts/jquery.msgBox.js").Append(""></script>");
[code]...
This method I am calling on each and every page on the button click where ever I required as follows
ClientScript.RegisterStartupScript(this.GetType(), "Popup", Alert.ShowAlertMessage("Hello", "Welcome"), true);
But this is not giving me the output I needed, the one which I converted is the following URL....
View 1 Replies
Feb 3, 2011
I am creating a custom control and was wondering if it is possible to render any JavaScript in the head tags of the page it is placed on? I am thinking I would need to use the FindControl method, but am not sure what I need to bind to. I am thinking the page object? Let me know if I am thinking in the right direction or if there is another option.
My only concern with the above mentioned idea is that how do I render all my content while placing some code in the head tags?
View 2 Replies
Jan 6, 2010
If I have a standard HTML textbox
[Code]....
but got a readonly error.
View 10 Replies
Oct 26, 2010
I have a hidden variable and its value is being updated using javascript(client side) which I make a call from server side code. After making the call I am not able to retrieve the updated value from Server side variable. I went through this forum [URL] but not able find a way how to implement functionality with IFRAME. I am trying to call the client side code and retrieve the updated value from server side in page_load event.
View 5 Replies
Jan 30, 2010
I've got two textboxes running server side and have their visibility turned off. I'm using a couple of ASP.NET controls which require the textboxes to exist. However, I am filling them from the code behind and would not like the user to see this. Can the user turn the visibility on and see the values entered in the text box? I tried using FireBug, and I couldn't seem to select the visibility option in order to edit it. However, I'm quite new to Firebug, so there may be another way? Or does running it server side mean that the client can't ever view the contents of the textbox?
View 1 Replies
Jan 6, 2010
If I have a standard HTML textbox: I can retrieve the value using Request.Form. But how do I go about populating this textbox from the server-side? I tried Request.Form["txtTest"] = "blah"; but got a readonly error.
View 2 Replies
Aug 27, 2010
I have created dynamic control with both server and client side events.. if i set client side event server side event is not firing.. I have created the link button which will validate and do some necessary actions.. Validation is working but click event of link button is not firing .. if we remove the client side event , server side event is firing.. how to avoid this.. I want both events..
View 2 Replies
Dec 9, 2010
I have a requirement in which I have to call a JavaScript function in between my server side event and in that JavaScript function code I have to set hidden field value and in next line of that same event i have to use that hidden field value.
View 4 Replies
May 20, 2010
For the ASP.NET validator controls, I want to use both client-side validation for the user experience and server-side validation to guard against hackers. ASP.NET documentation leads me to believe that if EnableClientScript="True" then there will be no server-side validation if client-side validation is possible for the user agent. To get server-side validation, the documentation says use EnableClientScript="False", which bypasses client-side validation altogether.
Am I misunderstanding how the validator controls work? I ask because it seems obvious that many developers would want both client and server side validation together, and I find it hard to believe both together is not possible with one of the standard validation controls.
If I am understanding the ASP.NET documentation correctly, then I can find only two options:
Use two validator controls exactly the same except for their ID and EnableClientScript properties. Obviously ugly for maintaining two controls almost the same.Write some code behind to check if postback then invoke the Validate method on the validator group. Why write code behind if there a way to be automatic from the control?
Is there a way to do so using a single validator control with no code behind?
View 4 Replies
Dec 9, 2010
As far as I know server controls doesn't have a .aspx file. So I need to load a aspx file in order for it to work like a template for my server control, and render my server control content.
View 4 Replies
Feb 18, 2010
I am trying to render control(ComboBox) programmatically, and i am getting error that tell me that i have to add ScriptManager to the page.
But, i did that, and still its not working:
[Code]....
And the render control html is:
protected override void Render( System.Web.UI.HtmlTextWriter writer )
View 3 Replies
Sep 27, 2010
I am using HTML control,and want to visible false from the server side with out using attributes runat="Server"
View 2 Replies
Jan 22, 2010
I'm trying to develope a collapsible panel control with designer.
I have the following two classes:
[Code]....
and this one:
[Code]....
In fact, the designer class is a copy of a sample class in MSDN and I only tried to customize it to work for me. I'm not sure if all methods are necessary or not.
I have the following two questions:
1- When I use this contrl in design mode, I can add or delete controls to it, in the html view, tags are not updated. so when I close the page and open it again, all changes are lost.
2- I have added this control to the same asp.net project that is using this control. Isn't there any way to have this controil in tool box?
View 5 Replies
Oct 4, 2010
is it posible to add client side functionality to a custom server control in vb.net?i am looking at msdn library and there is no code for vb :/ http://msdn.microsoft.com/en-us/library/aa719700%28v=VS.71%29.aspxI fount this on MSDN Library Adding Client Capabilities to a Web Server ControlWhat i'm trying to do is to add some client functionality to my control, so that you can get or set some properties/values on client side. From the above link i see that this is doable with Ajax Server Control, but i don't have it, i have Custom Server Control. Can i do this with Custom Server Control and how?
View 16 Replies
Nov 23, 2010
I have a user control which contains a CustomValidator which is used according to whether a RadioButton is checked or not (there are several RadioButtons, I'm only showing the relevant one)
<asp:RadioButton runat="Server" ID="RadioBetween" GroupName="DateGroup" CssClass="date_group_options_control_radio" />
[code]...
There is some client + server side validation code (the server side code does exactly the same thing and is skipped for brevity)
<script type="text/javascript">
function ValidateDateFields_Client(source, args) [code]...
There are two instances of this control in the page. When running the client side version it hits the wrong one (the version of the control which is disabled). You can see from the generated HTML both are correctly specified. I'm not sure how .NET works out which clientside function to call given they both have the same name.
<script type="text/javascript">
//<![CDATA[
var ctl00_MCPH1_QueryTextValidator = document.all ? document.all["ctl00_MCPH1_QueryTextValidator"] : document.getElementById("ctl00_MCPH1_QueryTextValidator");
[code]...
Do i need to add something in to scope it? What's the best way to achieve this? If I disable the loading of the second control everything works fine.
View 1 Replies
Apr 26, 2010
can we use server side controls in MVC, if no then why server side control list appears.
View 3 Replies
Jun 29, 2010
how to get the value of
<textarea id="textarea" style="width: 600px; height: 200px" >
View 12 Replies
