I'm sure I'm doing something wrong here, but I cannot figure it out.
This is in my aspx page:
[code]....
And this is in my aspx.vb page:
[code]....
I would like to referecne "div" that I dynamically created in code behind.
[code]....
I get error saying can't find the div.
How do I reference div that I created in code behind?
runat="server" seem not working.
I got problem finding the Control ID in my ASP.NET page.
When I try to refer that ID, it always give me:
I am trying to refer this:
[Code]....
I pass this id from here:
[Code]....
This is my code behind which is driving me crazy :(
[Code]....
When I use label to display the STRING INTIME, IT GIVES ME "textboxCashier1In"
BUT WHEN I DO THIS:
[Code]....
Object reference not set to an instance of an object. when I try to access these dynamically created controls using FindControl.
I have a dynamically created control within a table cell. The table itself is contained within a page that has a master page. I've tried so many different ways to access this control.
Below is the latest iteration
AttrTable is the asp table, and row.Attr_Type is the name I've given to the control (it iterates through a datatable to set the names for the control)
tmpVal = CType(AttrTable.FindControl("TD_" & row.Attr_Type).FindControl(row.Attr_Type), DropDownList).Text
Below are various ways I've tried to access the control:
Dim form As Control = Page.Master.FindControl("form1")
Dim content1 = form.FindControl("ContentPlaceHolder1")
[Code]....
I have an asp:table control that I construct dynamically. I place a few textboxes in it within a for loop and assign their IDs in code. I'll include an abbreviated code fragment showing how I'm doing this:
[Code]....
The page then displays correctly and the ID is set correctly when I view the source, but when I try to access the textbox later when the form is submitted the call to FindControl(idStr) returns null no matter what I do.
I have created an Asp.Net Ajax Server Control that will be dropped on several aspx pages. I have created an HTMLGenericControl within the OnInit method of the control. This control is a div. Within the code I also need to add an onclick event to a button so that this div is shown.
However, when I call divName.ClientID within the control to pass it to the javascript it doesn't include the part of the ID before the "divName" section of the rendered control id - ct01_ct01_divName.Here is part of the OnInit() method within the ASP.Net Ajax Server Control.[Code]....
I add a select control to a ASPX page like below:
hgc = new HtmlGenericControl();
hgc.InnerHtml = @"<select runat='server' id='my_selectlist'>
<option value='volvo'>Volvo</option>
<option value='saab'>Saab</option>
<option value='mercedes'>Mercedes</option>
<option value='audi'>Audi</option>
</select>";
Then in a Button click event, I use the code below, try to get the value selected
HtmlSelect s = (HtmlSelect)hgc.FindControl("my_selectlist");
label.Text = s.Value;
I get a error:"Object reference not set to an instance of an object."Does anyone try it before?
I have a PlaceHolder control inside of a ListView that I am using to render controls from my code behind. The code below adds the controls:
TextBox tb = new TextBox();
tb.Text = quest.Value;
tb.ID = quest.ShortName.Replace(" ", "");
((PlaceHolder)e.Item.FindControl("ph_QuestionInput")).Controls.Add(tb);
I am using the following code to retrieve the values that have been entered into the TextBox:
foreach (ListViewDataItem di in lv_Questions.Items)
{
int QuestionId = Convert.ToInt32(((HiddenField)di.FindControl("hf_QuestionId")).Value);
Question quest = dc.Questions.Single(q => q.QuestionId == QuestionId);
TextBox tb = ((TextBox)di.FindControl(quest.ShortName.Replace(" ","")));
//tb is always null!
}
But it never finds the control. I've looked at the source code for the page and the control i want has the id:
ctl00_cphContentMiddle_lv_Questions_ctrl0_Numberofacres
For some reason when I look at the controls in the ListViewDataItem it has the ClientID:
ctl00_cphContentMiddle_lv_Questions_ctrl0_ctl00
Why would it be changing Numberofacres to ctl00? Is there any way to work around this?
UPDATE:
Just to clarify, I am databinding my ListView in the Page_Init event. I then create the controls in the ItemBound event for my ListView. But based on what @Womp and MSDN are saying the controls won't actually be created until after the Load event (which is after the Page_Init event) and therefore are not in ViewState? Does this sound correct?
If so am I just SOL when it comes to retrieving the values in my dynamic controls from my OnClick event?
UPDATE 2:
So i changed the code i had in my Page_Init event from:
protected void Page_Init(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
//databind lv_Questions
}
}
to:
protected void Page_Init(object sender, EventArgs e)
{
//databind lv_Questions
}
And it fixed my problem. Still a little confused as to why I want to databind regardless of whether it's a postback or not but the issue is resolved.
So all I want to do is simply find a user control I load based on a drop down selection. I have the user control added but now I'm trying to find the control so I can access a couple properties off of it and I can't find the control for the life of me. I'm actually doing all of this in the master page and there is no code in the default.aspx page itself.
MasterPage.aspx
[Code]....
MasterPage.cs
protected void goToSelectedPage(object sender, System.EventArgs e)
{
temp1 ct = this.Page.Master.LoadControl("temp1.ascx") as temp1;
ct.ID = "TestMe";
this.UpdatePanel1.ContentTemplateContainer.Controls.Add(ct);
}
//This is where I CANNOT SEEM TO FIND THE CONTROL ////////////////////////////////////////
protected void lnkSave_Click(object sender, System.EventArgs e)
{
UpdatePanel teest = this.FindControl("UpdatePanel1") as UpdatePanel;
Control test2 = teest.ContentTemplateContainer.FindControl("ctl09") as Control;
temp1 test3 = test2.FindControl("TestMe") as temp1;
string maybe = test3.Col1TopTitle;
}
Here I don't understand what it's telling me. for "par" I get "ctl09" and I have no idea how I am supposed to find this control. temp1.ascx.cs
protected void Page_Load(object sender, EventArgs e)
{
string ppp = this.ID;
string par = this.Parent.ID;
}
m having a object tag on the page.how can make runat="server".so that i can add data dynamically to it.
View 4 RepliesWhy this code not working
[code]....
When i look at url in broswer, look likw following ~/articles/csharp/miscellaneous/asds.aspx
But it will be [URL]
I am working on Asp.net 2.0.I have 1 problem.In my design <table ><td> <tr> structure is present.<table><tr>< td id="PanJan""< d>< r>< able>runat="server" is not use in this. How to find td, tr , table id when runat server property is not used.
View 6 RepliesI have one html string in DB like below
<div style="padding-left: 200px; padding-top: 20px">
<div style="text-align: left;padding-top:10px">
<input id="Text1" type="text" /></div>
<div style="text-align: left;padding-top:10px">
<input id="Text2" type="text" /></div>
<div style="text-align: left; padding-top: 10px">
<input id="Button1" type="button" value="Submit" /></div>
</div>
i wan to render this in aspx page. but before this i want to all runat server to all html control in above string
like
<div style="padding-left: 200px; padding-top: 20px">
<div style="text-align: left;padding-top:10px">
<input id="Text1" runat="server" type="text" /></div>
<div style="text-align: left;padding-top:10px">
<input id="Text2" runat="server" type="text" /></div>
<div style="text-align: left; padding-top: 10px">
<input id="Button1" runat="server" type="button" value="Submit" /></div>
</div>
I want to know differences between ASP.Net WebControls and Html Controls (with runat="server" attribute).
I also want to know the possible scenarios where I have to (or want to) prefer Html Controls (with runat=server) in place of asp.net server controls?
In case of some good articles on web, do forward me. But dont forward me the links with differences between webcontrols and html controls, because my question intended for runat="server" attribute.
I am facing one asp.net server side issue using vb.net the problem is i declared one html input hidden field in my page, the name is hidden1. but when i going to call that name into server side code, that time i got the below error, <b>Name "Hidden1" is not declared</b> Code below:
Default.aspx
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication2._Default" %>
<!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 id="Head1" runat="server">
[code]....
I'm dynamically creating a number of check box controls (CheckBoxList won't format as I need) by allocating HtmlGenericControl objects and adding them to table cells. A portion of my code is shown here:
[Code]....
The result is just as I want and, looking at the HTML, everything seems correct. However, when I try to read back the checkbox values on postback, Request.Form[id] always returns null. Part of this code looks like this:
[Code]....
i get this error with this code
private void Showroom(String Description, int at)
{
Panel pnl = new Panel();
[code]...
I'm building a web app that assembles output on the fly, and I'm trying to find the right way to instantiate HtmlGenericControl to create a DIV tag. By default, instantiating creates a SPAN tag. Anyone know how to use it so it creates a DIV?
View 2 Repliesi am working on a dynamic tree menu with nested <ul><li>-Lists.
when building the nested list every <li> element should contain a <div> with a small icon and a css-style behind.
here is my code:
[Code]....
this way the result in the browser shows the name of every "aNavItem" but there are no icons. if i put the line to set the inner text of the div BEFORE adding the "imgMove" to it both things are shown - the name of the element and on the right the icon
the problem is that i want the icon to be on the left and then the text, but there is no icon at all with the code above (it looks like the setting of the inner text overwrites the already added image-control in the div-tag)
I have the following error message: "Control 'ctl00' of type 'ImageButton' must be placed inside a form tag with runat=server"
The parameter used to create the control collection must be a "System.Web.UI.Page"
Is there a property on the Page object to enable the form tag runat=server?
Here is my code:[Code]....
HOWTO create ASP.NET C# controls on server side for posted data that had no runat=server on the client.
I have processes needing to post files to a ASP.NET application. These processes must post without runat=server as such:
<form ~~~~ to some ASP.NET/C#/aspx page>
<input type=file name=MY_FILE ~~~>
</form>
On the ASP.NET page, in the Page_Load I would code somethign like this:
[URL]
Here is the trick, the control "fileLIST_FILE" does not exist because the HTML does not have runat=server on it.
If the client did have runat=server the designer.cs would have somethign liek this:
System.Web.UI.HtmlControls.HtmlInputFile fileLIST_FILE;
With all that said, I want to make "fileLIST_FILE" on the fly inside Page_Load fromt he posted name of "MY_FILE".
do not focus on the fact that this is a file upload. I would like to know how to do this for any posted FORM data.
When I use an anchor tag on an aspx page as below,
<a href="~/pages/page.aspx?id=<%= ServervariableName %>"> test </a>
it will get the variable value correctly assigned to id but it won't route the page correctly as the ~ will not be evaluated without the runat="server" attribute on the 'a' tag. But once I add the runat server attribute, it does not evaluate the servervariable name anymore.. how this works or what I should do to take care of both?
The AutoPostBack doesn't seem to work. Anything I am leaving out?
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Its simple if I have an ASP.net page with an ASP.net linkbutton / hyperlink and I obtain a value from say a SQL Database and I store it in the label...
For example:
this.myLabel.Text = someValueReturnedFromADatabase
This is simple because it goes right to the code behind page and set the text value to the value returned from my database (aside from going into more details with data access layer, etc).
What I was wondering is what if I dont want to use an ASP.net linkbutton and I simply want to use an HTML link button (as I need to call the jquery fade function). How would I set the value someValueReturnedFromADatabase to a control that is not runat=server?
i'm trying make some stuffs in jQuery using asp.net. but the id from runat="server" is not the same as the id used in html.
i'm used to use this to get the id from this situation:
$("#<%=txtTest.ClientID%>").val();
but in this case. it does not work, and i'm clueless why.
[code]....