Web Forms :: Finding Dynamic Controls I Add In A PlaceHolder

Jun 27, 2010

My code was actually working before. I think since I switched to .NET 4, it may have stopped functioning.What I do is this: I add some TextBox controls inside a PlaceHolder control. Then when user clicks the submit button, I am reading values entered into these texboxes.

This is what's on the page:

[Code]....
This is how I add controls into my PlaceHolder:

[Code]....

And this is the button click event: [Code]....

Like I said, this code was working before but now it doesn't.

View 2 Replies

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Web Forms :: Placeholder Dynamic Controls - FindControl Doesn't Work

Jun 23, 2010

using VS 2005,Ajax and master pages This is how i'm adding controls to placeholder

[Code]....

here is code to read value but it returns null

TextBox text = PlaceHold1.FindControl("TxtSlotName0") as TextBox;

aspx page follows

<%@ Page Language="C#" MasterPageFile="~/Admin.master" AutoEventWireup="true" CodeFile="SlotAlloc.aspx.cs" Inherits="SlotAlloc" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label><br />
<table align="center" width="50%">
<tr>
<td align="center" colspan="2">
<asp:Label ID="LblErr" runat="server"></asp:Label>
</td>
</tr>
<tr>
<td align="right" width="50%">
<asp:Label ID="LblType" runat="server" Text="Type"></asp:Label></td>
<td style="width: 811px">
<asp:DropDownList ID="DropType" runat="Server">
</asp:DropDownList></td>
</tr>
<tr>
<td align="right">
<asp:Label ID="LblLogin" runat="server" Text="Login"></asp:Label>
</td>
<td style="width: 811px">
<asp:DropDownList ID="DropinHours" runat="server">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
<asp:ListItem>8</asp:ListItem>
<asp:ListItem>9</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>11</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
<asp:ListItem>16</asp:ListItem>
<asp:ListItem>17</asp:ListItem>
<asp:ListItem>18</asp:ListItem>
<asp:ListItem>19</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
<asp:ListItem>21</asp:ListItem>
<asp:ListItem>22</asp:ListItem>
<asp:ListItem>23</asp:ListItem>
<asp:ListItem>24</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="DropInMinutes" runat="server">
<asp:ListItem>01</asp:ListItem>
<asp:ListItem>02</asp:ListItem>
<asp:ListItem>03</asp:ListItem>
<asp:ListItem>04</asp:ListItem>
<asp:ListItem>05</asp:ListItem>
<asp:ListItem>06</asp:ListItem>
<asp:ListItem>07</asp:ListItem>
<asp:ListItem>08</asp:ListItem>
<asp:ListItem>09</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
<asp:ListItem>16</asp:ListItem>
<asp:ListItem>17</asp:ListItem>
<asp:ListItem>18</asp:ListItem>
<asp:ListItem>19</asp:ListItem>
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<asp:ListItem>25</asp:ListItem>
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<asp:ListItem>31</asp:ListItem>
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<asp:ListItem>34</asp:ListItem>
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<asp:ListItem>38</asp:ListItem>
<asp:ListItem>39</asp:ListItem>
<asp:ListItem>40</asp:ListItem>
<asp:ListItem>41</asp:ListItem>
<asp:ListItem>42</asp:ListItem>
<asp:ListItem>43</asp:ListItem>
<asp:ListItem>44</asp:ListItem>
<asp:ListItem>45</asp:ListItem>
<asp:ListItem>46</asp:ListItem>
<asp:ListItem>47</asp:ListItem>
<asp:ListItem>48</asp:ListItem>
<asp:ListItem>49</asp:ListItem>
<asp:ListItem>50</asp:ListItem>
<asp:ListItem>51</asp:ListItem>
<asp:ListItem>52</asp:ListItem>
<asp:ListItem>53</asp:ListItem>
<asp:ListItem>54</asp:ListItem>
<asp:ListItem>55</asp:ListItem>
<asp:ListItem>56</asp:ListItem>
<asp:ListItem>57</asp:ListItem>
<asp:ListItem>58</asp:ListItem>
<asp:ListItem>59</asp:ListItem>
<asp:ListItem>60</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="DropInSeconds" runat="server">
<asp:ListItem>01</asp:ListItem>
<asp:ListItem>02</asp:ListItem>
<asp:ListItem>03</asp:ListItem>
<asp:ListItem>04</asp:ListItem>
<asp:ListItem>05</asp:ListItem>
<asp:ListItem>06</asp:ListItem>
<asp:ListItem>07</asp:ListItem>
<asp:ListItem>08</asp:ListItem>
<asp:ListItem>09</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
<asp:ListItem>16</asp:ListItem>
<asp:ListItem>17</asp:ListItem>
<asp:ListItem>18</asp:ListItem>
<asp:ListItem>19</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
<asp:ListItem>21</asp:ListItem>
<asp:ListItem>22</asp:ListItem>
<asp:ListItem>23</asp:ListItem>
<asp:ListItem>24</asp:ListItem>
<asp:ListItem>25</asp:ListItem>
<asp:ListItem>26</asp:ListItem>
<asp:ListItem>27</asp:ListItem>
<asp:ListItem>28</asp:ListItem>
<asp:ListItem>29</asp:ListItem>
<asp:ListItem>30</asp:ListItem>
<asp:ListItem>31</asp:ListItem>
<asp:ListItem>32</asp:ListItem>
<asp:ListItem>33</asp:ListItem>
<asp:ListItem>34</asp:ListItem>
<asp:ListItem>35</asp:ListItem>
<asp:ListItem>36</asp:ListItem>
<asp:ListItem>37</asp:ListItem>
<asp:ListItem>38</asp:ListItem>
<asp:ListItem>39</asp:ListItem>
<asp:ListItem>40</asp:ListItem>
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<asp:ListItem>50</asp:ListItem>
<asp:ListItem>51</asp:ListItem>
<asp:ListItem>52</asp:ListItem>
<asp:ListItem>53</asp:ListItem>
<asp:ListItem>54</asp:ListItem>
<asp:ListItem>55</asp:ListItem>
<asp:ListItem>56</asp:ListItem>
<asp:ListItem>57</asp:ListItem>
<asp:ListItem>58</asp:ListItem>
<asp:ListItem>59</asp:ListItem>
<asp:ListItem>60</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td align="right">
<asp:Label ID="Lbllogout" runat="server" Text="Log Out"></asp:Label>
</td>
<td style="width: 811px">
<asp:DropDownList ID="DropOutHours" runat="server">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
<asp:ListItem>8</asp:ListItem>
<asp:ListItem>9</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>11</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
<asp:ListItem>16</asp:ListItem>
<asp:ListItem>17</asp:ListItem>
<asp:ListItem>18</asp:ListItem>
<asp:ListItem>19</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
<asp:ListItem>21</asp:ListItem>
<asp:ListItem>22</asp:ListItem>
<asp:ListItem>23</asp:ListItem>
<asp:ListItem>24</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="DropOutMinutes" runat="server">
<asp:ListItem>01</asp:ListItem>
<asp:ListItem>02</asp:ListItem>
<asp:ListItem>03</asp:ListItem>
<asp:ListItem>04</asp:ListItem>
<asp:ListItem>05</asp:ListItem>
<asp:ListItem>06</asp:ListItem>
<asp:ListItem>07</asp:ListItem>
<asp:ListItem>08</asp:ListItem>
<asp:ListItem>09</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
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<asp:ListItem>26</asp:ListItem>
<asp:ListItem>27</asp:ListItem>
<asp:ListItem>28</asp:ListItem>
<asp:ListItem>29</asp:ListItem>
<asp:ListItem>30</asp:ListItem>
<asp:ListItem>31</asp:ListItem>
<asp:ListItem>32</asp:ListItem>
<asp:ListItem>33</asp:ListItem>
<asp:ListItem>34</asp:ListItem>
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<asp:ListItem>45</asp:ListItem>
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<asp:ListItem>47</asp:ListItem>
<asp:ListItem>48</asp:ListItem>
<asp:ListItem>49</asp:ListItem>
<asp:ListItem>50</asp:ListItem>
<asp:ListItem>51</asp:ListItem>
<asp:ListItem>52</asp:ListItem>
<asp:ListItem>53</asp:ListItem>
<asp:ListItem>54</asp:ListItem>
<asp:ListItem>55</asp:ListItem>
<asp:ListItem>56</asp:ListItem>
<asp:ListItem>57</asp:ListItem>
<asp:ListItem>58</asp:ListItem>
<asp:ListItem>59</asp:ListItem>
<asp:ListItem>60</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList ID="DropOutSeconds" runat="server">
<asp:ListItem>01</asp:ListItem>
<asp:ListItem>02</asp:ListItem>
<asp:ListItem>03</asp:ListItem>
<asp:ListItem>04</asp:ListItem>
<asp:ListItem>05</asp:ListItem>
<asp:ListItem>06</asp:ListItem>
<asp:ListItem>07</asp:ListItem>
<asp:ListItem>08</asp:ListItem>
<asp:ListItem>09</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
<asp:ListItem>13</asp:ListItem>
<asp:ListItem>14</asp:ListItem>
<asp:ListItem>15</asp:ListItem>
<asp:ListItem>16</asp:ListItem>
<asp:ListItem>17</asp:ListItem>
<asp:ListItem>18</asp:ListItem>
<asp:ListItem>19</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
<asp:ListItem>21</asp:ListItem>
<asp:ListItem>22</asp:ListItem>
<asp:ListItem>23</asp:ListItem>
<asp:ListItem>24</asp:ListItem>
<asp:ListItem>25</asp:ListItem>
<asp:ListItem>26</asp:ListItem>
<asp:ListItem>27</asp:ListItem>
<asp:ListItem>28</asp:ListItem>
<asp:ListItem>29</asp:ListItem>
<asp:ListItem>30</asp:ListItem>
<asp:ListItem>31</asp:ListItem>
<asp:ListItem>32</asp:ListItem>
<asp:ListItem>33</asp:ListItem>
<asp:ListItem>34</asp:ListItem>
<asp:ListItem>35</asp:ListItem>
<asp:ListItem>36</asp:ListItem>
<asp:ListItem>37</asp:ListItem>
<asp:ListItem>38</asp:ListItem>
<asp:ListItem>39</asp:ListItem>
<asp:ListItem>40</asp:ListItem>
<asp:ListItem>41</asp:ListItem>
<asp:ListItem>42</asp:ListItem>
<asp:ListItem>43</asp:ListItem>
<asp:ListItem>44</asp:ListItem>
<asp:ListItem>45</asp:ListItem>
<asp:ListItem>46</asp:ListItem>
<asp:ListItem>47</asp:ListItem>
<asp:ListItem>48</asp:ListItem>
<asp:ListItem>49</asp:ListItem>
<asp:ListItem>50</asp:ListItem>
<asp:ListItem>51</asp:ListItem>
<asp:ListItem>52</asp:ListItem>
<asp:ListItem>53</asp:ListItem>
<asp:ListItem>54</asp:ListItem>
<asp:ListItem>55</asp:ListItem>
<asp:ListItem>56</asp:ListItem>
<asp:ListItem>57</asp:ListItem>
<asp:ListItem>58</asp:ListItem>
<asp:ListItem>59</asp:ListItem>
<asp:ListItem>60</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td align="right">
<asp:Label ID="LblNoofSlots" runat="Server" Text="Number Of Slots"></asp:Label></td>
<td style="width: 811px">
<asp:TextBox ID="TxtSlots" runat="server" AutoPostBack="True"></asp:TextBox>
</td>
</tr>
</table>
<asp:UpdatePanel id="UpdatePanel1" runat="server">
<contenttemplate>
<TABLE width="80%" align=center><TR><TD align=center colSpan=4> <asp:Button id="BtnGenerate" onclick="Button1_Click" runat="server" Text="GENERATE"></asp:Button></TD></TR><TR><TD style="TEXT-ALIGN: center" width="20%">Slot Name</TD><TD style="TEXT-ALIGN:
center" width="30%">OnTime/Time period</TD><TD style="TEXT-ALIGN: center" width="20%">Time From</TD><TD style="TEXT-ALIGN: center" width="30%">Time To</TD></TR><TR><TD colSpan=4><asp:PlaceHolder id="PlaceHold1" runat="server"><br/><br/></asp:PlaceHolder> </TD></TR></TABLE>
</contenttemplate>
</asp:UpdatePanel>
<table align="center" width="80%">
<tr>
<td align="center">
<asp:Button ID="BtnSubmit" runat="server" OnClick="BtnSubmit_Click" Text="Submit" />
</td>
</tr>
</table>
</asp:Content>

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Web Forms :: Finding Radiobutton In Placeholder

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I am having problems finding my UserControls inside the Controls collection of a Placeholder control.

I have a ListView control with a PlaceHolder control in its ItemTemplate. OnItemdataBound for the ListView control I am adding a custom UserControl to the Controls collection of the Placeholder control. It all renders fine. My problem is when I try to find my user controls in the Placeholder. I just can't get it back. My code is below.

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[Code]....

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Loading the controls to the placeholder.

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[Code]....

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[Code]....

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[Code]....

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I recently built a table dynamically on a page.

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Now that I've added a master page to this things apparently have gotten more complicated. This won't fill the value for the textbox in the table cell that I want. I know the value still exists because if I do this

Request.Form.GetValues("ctl00$MainContent$TextBoxRow_" + i + "Col_1")[0]

Has the value that I want to put into that text box. I know the text box gets created because it's there when the page refreshes. But I can't seem to find that text box so i can put a value in it.

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Web Forms :: How To Copy A Placeholder To Another Placeholder

Aug 4, 2010

[Code]....

I want to copy a placeholder to another placeholder, i know, i can't write somethin like this,

plh_footer = plh_header;

how can i do that?

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Finding A Dynamic Reporting Tool?

Jan 23, 2010

I'am looking for a dynamic reporting tool for Asp.Net. Tool should support drag drop of data fields, simple grouping and simple expressions. Actually end users will use this tool for data listing. Rendering to html and pdf is enough.

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C# - Placeholder Containing Dynamic Table Is Empty Unless Create Table Twice?

Jun 4, 2010

I am dynamically creating a table that contains a textbox in each cell. The table is put in a placeholder control. Everything displays perfectly. The problem is when I go to retrieve the values entered in the cells. I have the code to generate the table in a separate method called CreateTable(). In order for my program to find a table in the placeholder when I go to save, I have to run CreateTable() in a postback event AND in the PageLoad event. If I call CreateTable() in only one of those places and I try to save, it says the placeholder is empty and, therefore, I cannot save the textbox contents. I've tried calling CreateTable() from InitLoad but that doesn't work because it needs to reference values from three static controls: 1 dropdown, 1 listbox, and 1 calendar control, which I don't believe have had their viewstate rendered yet.

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IE8 Says It "cannot Display The Webpage" When Using A Dynamic PlaceHolder?

Aug 19, 2010

I have a ASP.NET page using a PlaceHolder. Grids are build programmatically and added to this PlaceHolder when the page is run. Example:

ASPX Code:

<asp:PlaceHolder ID="myPlaceHolder" runat="server" />

Code behind:foreach (var country in Tables.Countries())
{
var nGrid = BuildGrid(country.Code);[Code]....

This page works flawlessly in Opera and Firefox. Internet Explorer 8 shows me the "cannot display the webpage" screen.

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Web Forms :: Delete Controls By ID In Placeholder?

Jun 14, 2010

I have an .aspx form that has a place holder that allows a user to add controls on button click. Upon button click of "Remove last added control" the user will see the last control be removed. I have searched this and can capture the control that they are wanting to delete but am having trouble actually removing the darn thing!!

Here is my code that I have that iterates through the controls and finds the specific ID that i want to delete but does not seem to delete it due to my syntax I believe (Coded in C# in .Net envirnomnet).

foreach (Control c in myPlaceHolder.Controls)
{
if (c.ID == "myTextBox" + Convert.ToString(Session["Control_Count"]))
{
this.Controls.Remove((c));
}
}

The session["Control_Count"] is the highest or greatest value that is added to the page. (example of 2 control ID's: myTextBox1, myTextBox2.) I want to be able to Delete TextBox2 and leave TextBox1 and thought thi swas a way of doing so.

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Forms Data Controls :: HyperLink Added To Placeholder?

Sep 29, 2010

I have a Placeholder in which I added a Hyperlink (the hyperlink is an attachment in messaging application) how do I get the hyperlink to go hot when the user put there mouse over it:

[Code]....

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Forms Data Controls :: PlaceHolder Contents Not Shown After PostBack

Oct 5, 2010

I have a GridView control which contains a custom <pagertemplate> with a <asp:PlaceHolder runat="server" ID="plcPages"> control. The .aspx.cs file contains the following code:
protected void Page_Load(object sender, EventArgs e) {
... {Other Code} ...
GridViewRow pagerRow = GridView1.BottomPagerRow;
PlaceHolder PagePlc = (PlaceHolder)pagerRow.Cells[0].FindControl("plcPages");
Button btnPage;
int iPageNum;
for (int i = 0; i < GridView1.PageCount; i++) { iPageNum = i + 1;
btnPage = new Button(); btnPage.ID = "btnPage" + iPageNum.ToString();
btnPage.CommandName = "Page"; btnPage.CommandArgument = iPageNum.ToString();
btnPage.Text = " " + iPageNum.ToString() + " ";
PagePlc.Controls.Add(btnPage); } }

Everything works fine the first time the page is displayed. But, when I click any pager button, including the Next and Prev command buttons that are not part of the PlaceHolder, the contents of the PlaceHolder are never re-displayed. I know from searching other posts that the PlaceHolder contents are lost during the trip to the server, but I am already recreating them every time the page is loaded. They are just never being shown again. I've spent the last two days playing with ViewState And every other combination.

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Forms Data Controls :: How To Add And Access To Placeholder In A Repeater Control

Aug 16, 2010

i want to add and access to placeholder in a repeater control. for example,

[Code]....

how can i acces to placeholder, on codebehind. i couldn't acces with it's id.

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Forms Data Controls :: Create A Placeholder For Drop Down Lists?

Aug 25, 2010

I'm using VWD with a database back end. I have a list of teams which are marked off by league, level, division, teamid and then using gridview for the list of players per teams.I've got the drop downs working correctly but running into a little snag and that is on the auto postback.When I only have one option come up in a list, i obviously don't change that list and thus it doesn't change the next drop down because there is no post back. is there a way to use a "header" value?

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